CN102925469A - 一种编码β-葡萄糖苷酶的基因及应用 - Google Patents
一种编码β-葡萄糖苷酶的基因及应用 Download PDFInfo
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Abstract
本发明提供一种编码β-葡萄糖苷酶的基因,名称为Unglu135B12,是通过构建芒草驯养牛瘤胃未培养微生物宏基因组DNA文库和文库克隆的β-葡萄糖苷酶活性检测筛选法获得,是下列核苷酸序列之一:1)序列表中序列1的DNA序列及其部分序列;2)与序列表中序列1限定的DNA序列具有80%以上同源性的DNA序列。序列表中序列1的DNA是克隆载体pUC19部分DNA序列和克隆在该载体上的外源未培养微生物的DNA,该外源DNA片段由3470个碱基组成,包含基因Unglu135B12长2340bp,该基因的GC含量为61.15%。该基因用于生产β-葡萄糖苷酶。本发明亦提供Unglu135B12编码氨基酸序列:1)序列表中序列2的氨基酸序列;2)与序列表中序列2限定的氨基酸序列具有80%以上同源性的氨基酸序列。该β-葡萄糖苷酶具有很好的稳定性,具有应用降解纤维素工业生产。
Description
技术领域
本发明涉及从未培养微生物中克隆的酶基因,尤其涉及通过构建芒草驯养牛瘤胃未培养微生物的宏基因组DNA文库而筛选得到的酶基因。
背景技术
纤维素是地球上丰富且可再生的生物聚合物。由于其结构复杂,所以纤维素降解过程依靠复杂的多酶体系即内切纤维素酶、外切纤维素酶与β-葡萄糖苷酶三种酶的协同作用才能完成,其中β-葡萄糖苷酶是此过程的限速酶。
β-葡萄糖苷酶在自然界的分布较为广泛。目前针对微生物中的β-葡萄糖苷酶的研究文献主要集中在酵母、真菌、细菌中。夏永振应用表面表达技术将来自Trichoderma reesei的β-葡萄糖苷酶在酿酒酵母表面进行表达,并研究其酶学性质,实验结果表明酵母表面表达的酶有活性,产酶的最佳诱导时间为24 h,最适温度是70℃。Shipkowski 和Brenchley在Paenibacillus sp. strain C7中发现一种耐低温的β-葡萄糖苷酶,该酶属于糖苷水解酶家族3 (Shipkowski et al., 2005)。Brunner等从致病疫霉Phytophthora infestans中获得的基因bgx1,编码一个具有木糖酶/β-葡萄糖苷酶的双功能酶。
公开号为CN1778907的中国专利介绍了一种β-葡萄糖苷酶及其编码基因与应用,公开了一种β-葡萄糖苷酶及其编码基因与应用。本发明提供的β-葡萄糖苷酶,是具有下述氨基酸残基序列之一的蛋白质:1)序列表中的SEQ ID NO:2;2) 将序列表中SEQ ID NO:2的氨基酸残基序列经过一个或几个氨基酸残基的取代和/或缺失和/或添加且具有β-葡萄糖苷酶活性的蛋白质。本发明的β-葡萄糖苷酶及其编码基因在纤维素的降解中具有广泛的用途。
公开号为CN1786171的中国专利介绍了一种嗜热碱性β-葡萄糖苷酶及其编码基因,涉及一种β-葡萄糖苷酶及其编码基因。该酶具有在高温、碱性条件下保持较高酶活性的特点,其最适反应温度约为70℃,最适反应pH 值约为8.0,该酶能催化水解β-葡萄糖苷键生成葡萄糖,在食品、医药、纺织、能源等方面具有重要的应用价值。
公开号为CN101050447的中国专利介绍了一种β-葡萄糖苷酶基因工程菌及其应用,公开了一种β-葡萄糖苷酶基因工程菌——大肠埃希氏菌(Escherichia coli)CGMCC No.1626,以及该菌种在制备有效霉亚基胺A化合物中的应用。利用该工程菌转化有效霉素A可得到有效霉亚基胺A产物,具有转化效率高、成本较低、反应条件温和、产物纯度高、分离纯化容易、化学污染少等优点。
公开号为CN102268421A的中国专利介绍了一种β-葡萄糖苷酶基因的克隆、表达及应用,具体涉及一种能够分解乳糖的在高温和低温条件下都具备很强活性的β-葡萄糖苷酶,并能够高效表达的分泌型β-葡萄糖苷酶的基因工程菌。本发明公开了一种具有如SEQ ID NO:2所示的氨基酸序列的β-葡萄糖苷酶,并构建出能高效分泌所述β-葡萄糖苷酶的基因工程菌,并保藏于中国微生物菌种保藏管理委员会普通微生物中心,其保藏编号为CGMCCNo.4891。本发明所述方法生产的β-葡萄糖苷酶具有很强的半乳糖苷酶的活性,可应用于乳品工业,同时被发明所述的β-葡萄糖苷酶在较大的pH值范围及温度范围内具有稳定的活性。
公开号为CN102358898A的中国专利介绍了一种中温β-葡萄糖苷酶BglA1及其基因和应用,涉及一种中温β-葡萄糖苷酶BglA1及其基因和应用。本发明提供了一种新的中温β-葡萄糖苷酶BglA1,其具有如SEQ ID NO.1所示氨基酸序列,且本发明还提供了编码上述中温β-葡萄糖苷酶BglA1的基因,其核苷酸序列如SEQ ID NO:2所示,以及包含该基因的重组载体和重组菌株及其应用。本发明提供的中温β-葡萄糖苷酶BglA1最适pH为6.0,在 pH 5.0~7.0都有较高的酶活性。最适温度为50℃,其耐热特性好,可使其在需求耐热环境的工业生产上应用。
公开号为CN102399803A的中国专利介绍了一种改进的β-葡萄糖苷酶基因及其重组酶的制备,改进的β-葡萄糖苷酶基因及其重组酶的制备,改进的β-葡萄糖苷酶基因核苷酸序列bglII如SEQIDNO.1所述。本发明同时提供了以基础盐为培养基的该重组菌表达β-葡萄糖苷酶的方法。通过对基因的人工进化和高密度发酵,改造后的黑曲霉β-葡萄糖苷酶基因bglII在毕氏酵母中的表达量较原始基因bglI提高了36倍。本发明可用于β-葡萄糖苷酶基因的分子改造及其重组毕赤酵母基因工程菌的高密度发酵,能显著提高β-葡萄糖苷酶的表达水平。
公开号为CN102492710A的中国专利介绍了一种β-葡萄糖苷酶Cel1b及其表达基因与应用,涉及β-葡萄糖苷酶Cel1b及其表达基因与应用,属于生物工程技术领域。本发明提供一种表达β-葡萄糖苷酶Cel1b的基因cel1b,其核苷酸序列如SEQ ID NO:1所示;本发明还提供一种β-葡萄糖苷酶Cel1b,其氨基酸序列如SEQ ID NO:2所示。本发明中的β-葡萄糖苷酶Cel1b可以用于工业上合成价格昂贵的纤维寡糖,进而应用于研究纤维素酶水解机理、微生物对纤维素的利用过程等。另外这种体外生物法合成的纤维寡糖可作为功能性食品或食品添加剂,也可作为糖尿病患者的甜味剂,还可以应用于化妆品工业和制药工业,其应用前景广阔。
公开号为 CN1500872的中国专利介绍了一种高温β-葡萄糖苷酶、其编码基因及其用途,由嗜热菌(Thermoanaerobacter tengcongensis)MB4总DNA获得高温β-葡萄糖苷酶基因(β-glucosidase gene),构建了原核表达质粒,转化大肠杆菌表达β-葡萄糖苷酶。通过氨基酸序列比较,该酶为一新型β-葡萄糖苷酶。
公开号为CN101100659的中国专利介绍了一种β-葡萄糖苷酶及其编码基因与应用,公开了一种β-葡萄糖苷酶及其编码基因与应用。该β-葡萄糖苷酶,是如下(a)或(b)的蛋白质:(a)由序列表中序列3所示的氨基酸序列组成的蛋白质;(b)将序列表中序列3的氨基酸序列经过一个或几个氨基酸残基的取代和/或缺失和/或添加且具有β-葡萄糖苷酶活性的由(a)衍生的蛋白质。在以纤维素为原料生产燃料酒精的同步糖化共发酵工艺中的发酵微生物酵母菌最适发酵条件下,该酶具有较高的酶活,可以应用于该工艺中以生产燃料酒精。
公开号为CN101363026的中国专利介绍了一种编码β-葡萄糖苷酶的基因,提供了一种编码β-葡萄糖苷酶的基因,名称为Unbgl1B,它通过构建碱性污染土壤未培养微生物的宏基因组DNA文库和文库克隆的β- 葡萄糖苷酶活性检测筛选法获得,是下列核苷酸序列之一:1)序列表中序列1的DNA序列及其部分序列;2)与序列表中序列1限定的DNA序列具有80%以上同源性的DNA序列。序列表中序列1的DNA是克隆载体 pGEM-3Zf(+)部分DNA序列和克隆在该载体上的外源未培养微生物的 DNA,该外源DNA片段由838个碱基组成,该基因的GC含量为54.3%。该基因用于生产β-葡萄糖苷酶,以将纤维二糖解离成单个葡萄糖分子。
公开号为CN101418306的中国专利介绍了一种耐高温β-葡萄糖苷酶基因在植物基因转化中的应用,涉及一种通过基因体外定向分子进化和定点突变相结合获得的耐高温β-葡萄糖苷酶基因在植物基因转化中作为报告基因的应用,属于植物基因工程领域。本发明公开了该耐高温β-葡萄糖苷酶基因在植物遗传转化中使用方法和效果。耐高温的β-葡萄糖苷酶基因可免除转基因生物体中内源背景的干扰,增加转基因检测的可靠性,使用耐高温β-葡萄糖苷酸酶还将明显提高转基因检测的灵敏度,使时空特异、生物或非生物环境诱导的表达调控研究结果差异更大、数据更准确,并且将大大降低底物的用量,降低检测成本。
公开号为CN101492661的中国专利介绍了一种β-葡萄糖苷酶基因的克隆、表达及用于龙胆低聚糖的制备, 一种β-葡萄糖苷酶基因的克隆、表达及用于龙胆低聚糖的制备,属于酶基因工程和酶工程领域。本发明由黑曲霉WX-07总RNA逆转录合成β-葡萄糖苷酶基因 (bgl)SEQ ID NO:1,bgl的cDNA以质粒pPIC9K为表达载体,以毕赤酵母(P.pastoris)为表达宿主,实现bgl基因在胞外的可溶性表达;bgl的cDNA 全长2523个核苷酸,编码841个氨基酸,构建的bgl/pPIC9K转化P.pastoris KM71 可表达BGL酶。BGL酶具有转糖苷活性,能将葡萄糖转糖苷生成龙胆低聚糖。优化酶法制备龙胆低聚糖的工艺,并利用阳离子树脂进行分离精制,达到较好效果。制得的龙胆低聚糖产品作为功能性食品配料,具有低热量,低龋齿,整肠等生理功能。本发明为龙胆低聚糖的制备提供了具有商业化价值的新途径。
公开号为CN101880680A的中国专利介绍了一种编码β-葡萄糖苷酶的基因及其应用,一种编码β-葡萄糖苷酶的基因bgl,含有SEQ ID NO:1的核苷酸序列或其功能等同变异体。本发明含涉及该基因或其功能等同变异体编码的β-葡萄糖苷酶(SEQ ID NO:2)及该酶在降解纤维素中的应用。
公开号为 CN102477417A的中国专利介绍了一种β-葡萄糖苷酶及其编码基因与应用,公开了一种β-葡萄糖苷酶及其编码基因与应用。本发明提供的β-葡萄糖苷酶是如下1)或2)的蛋白质:1)由序列表中序列2所示的氨基酸序列组成的蛋白质;2)将序列表中序列2的氨基酸残基序列经过一个或几个氨基酸残基的取代和/或缺失和/或添加且具有β-葡萄糖苷酶活性的由1)衍生的蛋白质。实验证明:该重组酶在毕赤酵母中高效分泌表达高达190.2U/mL,该重组酶最适pH和最适温度分别为pH6.0和55℃,具有较宽的底物作用范围和良好的热稳定性,且可水解纤维多糖、大麦葡聚糖、地衣多糖和昆布多糖。该重组酶具有一定的转糖苷能力,利用纤维二糖为底物,可以生成纤维三糖、龙胆二糖等,在食品、饲料、生物化工及医药行业中具有很大的应用潜力。
公开号为 CN102321647A的中国专利介绍了一种β-葡萄糖苷酶、编码基因、载体、工程菌及其应用,公开了一种β-葡萄糖苷酶、编码基因、载体、工程菌及β-葡萄糖苷酶水解虎杖苷制备白藜芦醇的应用,所述β-葡萄糖苷酶基因具有与SEQ ID NO:2所示的多核苷酸序列70-100%的同源性,所述β-葡萄糖苷酶基因编码的β-葡萄糖苷酶具有与SEQ ID NO:1所示氨基酸序列95%-100%的同源性;本发明β-葡萄糖苷酶能够水解虎杖苷制备白藜芦醇,环境友好,产率高,应用前景广阔。
公开号为CN101845426A的中国专利介绍了一种黑翅土白蚁β-葡萄糖苷酶、编码基因、载体及应用,提供了一种黑翅土白蚁β-葡萄糖苷酶、编码基因、载体及应用。所述β-葡萄糖苷酶具有与SEQ ID NO:2所示多肽同源性95%以上的氨基酸序列。本发明发现了一种编码黑翅土白蚁β-葡萄糖苷酶的基因,该基因可在宿主细胞中大量表达以生产该β-葡萄糖苷酶,用于纤维素的降解,经检测本发明β-葡萄糖苷酶酶活达117U。本发明所提供的β-葡萄糖苷酶及其编码基因可应用于纤维素的降解。
而针对纯培养技术未能涉及的另一巨大的微生物资源库——未培养微生物,自从上世纪90年代末就吸引了越来越多研究者的目光。近年来通过宏基因组学技术,以获得目的基因的方法已日趋成熟,在以草食性动物消化道系统未培养微生物为对象的研究中,新的有关纤维素降解功能基因的发现层出不穷。郭宏等构建了水牛瘤胃总微生物的宏基因组文库,筛选得到一个具有β-葡萄糖苷酶活性的克隆。马淑华从兔盲肠微生物宏基因组文库中得到一个具有β-葡萄糖苷酶,全长为282 bp的核苷酸序列编码,其GC含量为60.3%,编码93个氨基酸。赵广存通过构建牛瘤胃宏基因组文库,筛选得到10个具有β-葡萄糖苷酶活性以及10个具有β-1,4-内切葡聚糖酶活性的克隆。
本发明以芒草驯养牛瘤胃未培养微生物作为研究对象,因芒草茎秆中纤维素和半纤维的含量高达80%,故经芒草驯养的牛瘤胃微生物具有更高的可获得纤维素降解酶的潜力。通过对其瘤胃微生物多样性分析发现,芒草驯养后牛瘤胃细菌中Bacteroidetes的比例从16.33%提高到28.15%,同时,在Firmicutes门,经芒草驯养的牛瘤胃细菌文库的比对信息中出现了Ruminococcus flavefaciens和Butyrivibrio fibrisolvens,这几种细菌均是主要的纤维素降解 菌,它们可以分泌大量的纤维素酶和半纤维素酶,促进宿主的食物消化和营养能量的吸收。我们进一步通过研究从芒草驯养牛瘤胃未培养微生物的宏基因组DNA文库中发现了新的具有β-葡萄糖苷酶活性的基因,这将极大的促进纤维素资源的降解利用,对缓解世界范围内的能源紧张起到巨大的推动作用。
发明内容
本发明所要解决的技术问题是提供一种具有高酶活力的β-葡萄糖苷酶基因 (Unglu135B12),是通过构建芒草驯养牛瘤胃未培养微生物宏基因组DNA文库和文库克隆的β-葡萄糖苷酶活性检测筛选法获得,以此为β-葡萄糖苷酶的生产提供一条新的途径和方法。
为解决上述技术问题,本发明提供了一种编码β-葡萄糖苷酶的基因,名称为Unglu135B12,来源于芒草驯养牛瘤胃未培养微生物,是下列核苷酸序列之一:
1)序列表中SEQ ID No:1的DNA序列及其部分序列;
2)与序列表中SEQ ID No:1限定的DNA序列具有80%以上同源性的DNA序列。
序列表中SEQ ID No:1的DNA是克隆载体pUC19部分DNA序列和克隆在该载体上的外源未培养微生物的DNA,该外源DNA片段由3470个碱基组成,重组质粒携带的外源DNA片段中包含完整的新基因Unglu135B12,该基因长2340 bp,GC含量为61.15%。
序列从序列表中的SEQ ID No:1的DNA从5’端第700位核苷酸开始到3039位核苷酸结束,存在一个完整的开放阅读框 (ORF,Open Reading Frame)。其中,自5’端的第700位至702位核苷酸为Unglu135B12的起始密码子ATG,自5’端的第3037位至3039位核苷酸为Unglu135B12的终止密码子TAG。
开放阅读框共2340个核苷酸,可编码序列SEQ ID No:2中780个氨基酸组成的蛋白质。
本发明提供了一种β-葡萄糖苷酶的氨基酸序列,名称为SEQ ID No:2,来源于芒草驯养牛瘤胃未培养微生物,是下列氨基酸序列之一:
1)与序列表中SEQ ID No:2限定的氨基酸序列具有60%以上同源性的氨基酸序列。
2)与序列表中SEQ ID No:3限定的氨基酸序列具有60%以上同源性的氨基酸序列。
3)与序列表中SEQ ID No:4限定的氨基酸序列具有60%以上同源性的氨基酸序列。
为了解决上述技术问题,本发明提供了一种β-葡萄糖苷酶基因的克隆方法,包括以下步骤:
(1)从芒草驯养牛瘤胃内容物中直接提取未培养微生物的宏基因组DNA;
(2)构建芒草驯养牛瘤胃未培养微生物宏基因组DNA文库;
(3)从芒草驯养牛瘤胃未培养微生物宏基因组DNA文库中筛选表达β-葡萄糖苷酶的克隆;
(4)β-葡萄糖苷酶基因的克隆及表达分析。
步骤(1)包括:
(1-1) 从芒草驯养牛瘤胃内容物样品中直接抽提宏基因组DNA;
(1-2) 采取脉冲场电泳和电洗脱法回收纯化粗制宏基因组DNA。
步骤(2)包括:
(2-1) 将回收的DNA连接到pcc2FOS vector上,包装,转导至EPI300宿主细胞中,构建成Fosmid文库;
(2-2) 检测Fosmid文库的覆盖度
步骤(3)包括:
(3-1) 获得具有β-葡萄糖苷酶活性的克隆;
(3-2) 酶切插入片段,回收1-5 kb长度的DNA片段;
(3-3) 以pUC19为载体构建亚克隆文库,并用β-葡萄糖苷酶活性检测筛选进行活性克隆的筛选。
步骤(4)包括:
(4-1) 获得表达Unglu135B12基因的阳性克隆;
(4-2) 设计合适特异引物,用PCR的方法扩增Unglu135B12基因;
(4-3) 用合适的限制性内切酶酶切PCR产物和表达载体pET28a(+),酶切回收产物连接,得到重组质粒pET135B12。
基因克隆的步骤还包括:对重组质粒pET135B12表达的β-葡萄糖苷酶基因进行测序和分析,对重组质粒pET135B12进行表达,对β-葡萄糖苷酶基因表达的蛋白质Unglu135B12的氨基酸序列进行分析。并且初步进行了该β-葡萄糖苷酶酶学性质的研究,包括温度、pH对酶活力的影响。
在一个具体实施中,重组表达载体所用宿主细胞可以是重组表达载体中的任意一种。
在一个具体实施中,Unglu135B12基因可应用于纤维素降解生产方面。
本发明通过构建芒草驯养牛瘤胃未培养微生物宏基因组DNA文库和文库克隆的β-葡萄糖苷酶活性检测筛选法,得到新的β-葡萄糖苷酶基因,可在宿主细胞中大量表达该基因以生产β-葡萄糖苷酶,酶学性质研究发现该β-葡萄糖苷酶对pH的适应范围较宽,因此更利于工业生产过程的应用,为推动纤维素资源利用开辟了一条新的途径。
附图说明
图1为从芒草驯养牛瘤胃内容物样品中直接提取未培养微生物的宏基因组DNA及电洗脱回收用于Fosmid文库构建的DNA,其中1:电洗脱回收的DNA;2:粗提DNA;M:Lambda Mix Marker 19。
图2为芒草驯养牛瘤胃未培养微生物宏基因组文库克隆的限制性内切酶EcoRΙ与Hind Ⅲ酶切分析以判断文库质量,其中 10:λ/Hind III digestive marker;1-9及11-17:文库克隆质粒酶切谱带。
图3为芒草驯养牛瘤胃未培养微生物宏基因组文库克隆的筛选;
图4为亚克隆文库的筛选;
图5 为Unglu135B12基因DNA序列分析图;
图6为重组质粒pET135B12经EcoR I、Not I酶切带型,其中M:λ/Hind III digestive marker;1:空载体酶切谱带;2:重组质粒pET135B12酶切谱带。
图7为验证重组质粒pET135B12携带的Unglu135B12基因转化大肠杆菌E.coli BL21后得到的转化子依然具有β-葡萄糖苷酶活性;
图8为温度对该β-葡萄糖苷酶活力的影响;
图9为pH对该β-葡萄糖苷酶活力的影响。
具体实施方式
本发明提供的一种编码β-葡萄糖苷酶的基因,名称为Unglu135B12,是下列核苷酸序列之一:
1)序列表中序列1的DNA序列及其部分序列;
2)与序列表中序列1限定的DNA序列具有80%以上同源性的DNA序列。
本发明提供的Unglu135B12基因是通过以下克隆方法的步骤获得的:
(1) 从芒草驯养牛瘤胃内容物中直接提取未培养微生物的宏基因组DNA;
(2) 构建芒草驯养牛瘤胃未培养微生物宏基因组DNA文库;
(3) 从芒草驯养牛瘤胃未培养微生物宏基因组DNA文库中筛选表达β-葡萄糖苷酶的克隆;
(4) β-葡萄糖苷酶基因的克隆及表达分析。
以下将通过实施例和附图详细解释本发明的技术方案。在本发明实施例中所用到的主要材料包括:限制性内切酶EcoR Ι和Hind Ⅲ、T4 DNA连接酶、pMD-18 T载体、购自大连宝生物公司;Fosmid文库构建试剂盒、高拷贝诱导剂、Fosmid DNA提取试剂盒购自美国Epicentre公司;Lambda Mix Marker 19购自Fermentas公司。
实施例1、从芒草驯养牛瘤胃内容物中直接提取微生物宏基因组DNA。
1) 从-80℃冰箱取出50g/管样品,室温解冻,放入250 mL三角瓶,并加入50粒直径50 mm的玻璃珠,向三角瓶中倒入已灭菌的磷酸缓冲液100 mL,200 rpm震荡15 min,静置1 min,取悬浮液置于灭菌50 mL离心管中,500 g离心3 min,将上清液转移到另一离心管,再次8000 g离心10 min,收集菌体,用此样品进行总DNA的提取。
2) 向沉淀的菌体加入6.3 mL提取缓冲液(Sodium Phosphate:100 mmol/L,pH 8.0;Tris-HCl:100 mmol/L, pH 8.0;EDTA:100 mmol/L,pH 8.0;NaCl::1.5 mol/L;CTAB:2%),反复吹打充分悬浮菌体,加入2%酸洗PVPP,100 μL溶菌酶(10 mg/mL),充分涡旋;
3) 37℃水浴30 min;
4) 加入蛋白酶K(20mg/mL)50 μL,37℃水浴30 min;
5) 加入0.7 mL SDS(20%,w/v),65℃水浴90 min,每隔10-15 min颠倒一次;
6) 8000 g离心15 min,吸出上清液;
7) 剩余沉淀再次加入2.7 mL提取缓冲液和0.3 mL 20%的SDS,65℃水浴10 min;
8) 8000 g离心15 min,吸出上清液与5中上清液合并;
9) 加入等体积的氯仿-异戊醇(24:1)溶液,8000g离心15 min,吸出上层水相;
10) 重复上个步骤;
11) 向上清液加入0.6倍体积的异丙醇,室温放置1 h;
12) 常温下,12000 g离心20 min,收集DNA;
13) 75%乙醇溶液洗涤2遍,室温晾干,加水溶解。
实施例2、采用脉冲场电泳和电洗脱法纯化粗提宏基因组DNA
1) 脉冲场电泳
① 将DNA样品制成低熔点琼脂糖凝胶的包埋块,4℃放置45 min方可上样;
② 脉冲场电泳凝胶的配置:
a.1 g琼脂糖加入100 ml 0.5×TBE,配置1%琼脂糖凝胶;
b.彻底清洗制胶槽、梳子,吹干;
c.充分溶解琼脂糖,冷却至50℃左右,灌胶,插好梳子,室温放置至少45 min可使用。
③ 封胶:
将①中制备的包埋块放入梳孔中,用少量的液态琼脂糖封口,室温放置5 min左右,即可开始电泳。
④ 电泳槽和恒温系统的准备:
a. 向电泳槽中倒入2 L左右的0.5×TBE;
b. 打开低温循环水浴,设定温度12℃,待电泳槽内缓冲液温度保持在12℃即可开始电泳;
c. 设定脉冲场电泳条件,时间15 h,脉冲范围1-12 s,电压4.5 V/cm。
注意观察整个电泳过程温度必须维持在15℃以下。
2) 电洗脱纯化DNA
a.取长10-20 cm长的透析袋,在2% NaHCO3,1 mM EDTA (pH 8.0)溶液中煮沸10 min,蒸馏水彻底冲洗;再次于1 mM EDTA溶液煮沸10 min,自然冷却,浸泡于1 mM EDTA溶液,4℃贮存,直至使用。使用前,取出透析袋用蒸馏水反复冲洗其内外壁;
b.透析袋一端用透析袋夹封口,注满1×TAE,将切下的胶条小心装入上述处理好的透析袋中,挤出大部分缓冲液,但剩余液体要始终包围凝胶块,取另一透析袋夹夹紧,注意不要残留气泡;
c.透析袋置于电泳槽中,设置电压为4 V/cm,时间3 h,使DNA结合在透析袋内壁;倒转电流电泳1 min,DNA进入袋内缓冲液。打开透析袋一端,吸出袋内所有液体,转移至一无菌离心管中,再次用缓冲液洗透析袋,收集到同一离心管中。
请参见图1,其中泳道1是电洗脱回收的DNA,2为粗提宏基因组DNA,M为Lambda Mix Marker 19。
实施例3、芒草驯养牛瘤胃未培养微生物宏基因组文库的构建
选用Epicentre公司Fosmid文库构建试剂盒进行宏基因组文库的构建
1) 宏基因组DNA的准备:用1 mL注射器反复吹吸纯化好的高分子量DNA,将经过注射器打断20次,50次,100次的产物分别在0.8%的琼脂糖凝胶上电泳,与control DNA和Mix Marker进行比较,选取大小最接近40 kb的DNA进行文库的构建。
2)按照如下体系进行插入DNA的末端修复:
(所有试剂务必完全溶解混匀,方可使用。)
末端修复反应在室温下进行45 min,即可终止反应。加入loading buffer,70℃水浴10 min。可放置于-20℃,保存备用。
3) 末端补平DNA与载体的连接
连接体系如下:
室温进行连接反应2 h,置于70℃水浴10 min,灭活Ligase,可放置于-20℃,保存备用,也可继续后续包装反应。
4) 感受态的制备
在包装反应的前两天,取出甘油保存的EPI300-T1R菌液,在补充LB培养基上划线,次日挑取单菌落,37℃摇培过夜。包装反应当天取过夜菌,按照10%比例转接,当菌液浓度达到OD600=0.8-1.0时,迅速放冰上,此感受态细胞应在72 h内使用。
5) 包装
① 取一管(50 μL)λ包装提取物(MaxPlax Lambda Packaging Extracts),冰上融化,分为两份,各25μL,一份放冰上备用,另一份放回超低温冰箱中,注意不要将MaxPlax Lambda Packaging Extracts暴露于干冰或其他CO2类物质;
② 将10μL 连接产物与完全融化的λ包装提取物25μL混合;
③ 移液枪吹打几次,混匀,注意避免气泡产生;
④ 30℃温育90 min;
⑤ 再次加入另一份25μL的λ包装提取物,混匀,30℃温育90 min;
⑥ 加入噬菌体稀释液(phage dilution buffer, PDB),使总体积为1 mL,轻微混匀;
⑦ 加入25 μL氯仿,轻微混匀,4℃放置备用。
6) 转导
取已制备好的EPI300-T1R感受态置冰上,每10 μL连接产物加入100μL感受态中,混匀,37℃温育20 min。将此感染了噬菌体的EPI300-T1R细胞涂布于含有12.5 μg/mL氯霉素的LB固体培养基上,37℃培养过夜。待菌落长出,挑取CopyControl Fosmid克隆。
实施例4、芒草驯养牛瘤胃未培养微生物宏基因组文库覆盖度的检测
经过瘤胃微生物总DNA的提取、纯化、连接、包装与转化等过程,最终构建的Fosmid文库含有20,160个阳性克隆。随机挑取16个转化子提取质粒,用EcoR Ι、Hind Ⅲ双酶切,发现均含有外源DNA片段,平均长度为30.23 kb。因此,该Fosmid文库的库容量达到609 Mb。
请参见图2,其中10为λ/Hind III digestive marker,其余泳道为文库克隆质粒酶切谱带。
同时随机挑取Fosmid文库中的92个克隆子进行单向测序(平均有效读取长度为656 bp),对随机末端测序结果进行Blast检测,比对结果表明只有3条测序结果具有同源序列(1条序列结果比对上多形拟杆菌,2条测序结果比对上非培养细菌),占3.26%;另外89条测序结果均未发现同源序列,占96.74%,说明该Fosmid文库覆盖的微生物多样性极其丰富且蕴藏着丰富的新基因资源。
实施例5、从芒草驯养牛瘤胃未培养微生物宏基因组文库中筛选β-葡萄糖苷酶活性克隆
将文库中的克隆子逐个挑取,接入含氯霉素(Chloramphenical,Cm) 22.5 μg/mL的LB液体培养基,37℃振荡培养过夜。吸取过夜菌液1 μL转移至含Cm (22.5 μg/mL)的固体β-葡萄糖苷酶筛选培养基上,37℃培养14-16 h,菌斑周围出现黑色变色圈的即初步确定为具有β-葡萄糖苷酶活性的克隆。
筛选培养基成分为:胰蛋白胨1%、酵母提取物0.5%、氯化钠1%、柠檬酸铁铵0.25%、七叶苷0.1%、琼脂粉1.5-2.0%。
重复筛选一次后,仍在筛选培养基上产生黑色水解圈的克隆F135B12,提取该克隆的质粒,进行EcoRΙ、Hind Ⅲ双酶切,用于构建亚克隆文库。
请参见图3,其中出现黑色水解圈的克隆为F135B12。
实施例6、F135B12外源DNA亚克隆文库的构建及β-葡萄糖苷酶活性克隆筛选
以克隆载体pUC19为载体,构建F135B12外源DNA亚克隆文库。
1) 目的片段酶切产物与pUC19载体的连接
提取筛选得到的β-葡萄糖苷酶活性克隆的Fosmid质粒,根据载体图谱选择EcoRΙ、Hind Ⅲ 进行双酶切,酶切产物经琼脂糖电泳后回收1-5 kb范围的片段。同时将pUC19载体进行相同内切酶的双酶切,按如下体系进行连接(总体积:10 μL):
连接反应于16℃进行,连接过夜。
2) 连接产物的转化
①DH5α化学感受态的制备(CaCl2法)
a. 制备感受态前两天在固体LB平板上划线培养DH5α,37℃培养14-16 h;
b. 从平板挑取一个单菌落接入液体LB培养基,37℃振荡培养过夜;
c. 按照1%-10%的比例转接过夜菌至新鲜液体LB培养基,180 rpm振荡培养2-3 h,待OD600达到0.4-0.6,迅速置冰上,放置30 min;
d. 4000 rpm离心1 min,收集菌体;
e. 吸出上清液,加入150 μL预冷的CaCl2溶液,重悬菌体,冰上放置3-5 min;
f. 4000 rpm离心1 min,吸出上清液,再次加入150 μL预冷的CaCl2溶液,重悬菌体,冰上放置3-5 min;
g. 4000 rpm离心1 min,吸出上清液,加入50 μL预冷的CaCl2溶液,重悬菌体,此即为感受态细胞。4℃放置不超过72 h使用。
热击转化
a. 将连接产物与感受态细胞混合,冰上放置30 min;
b. 准备42℃水浴,温度稳定后将a中混合液放入,热击60 s,迅速放冰上;
c. 冰上放置5 min,加入700 μL新鲜LB培养基,37℃恢复培养1 h;
d. 4000 rpm离心1 min,吸出上清液,留适当体积菌液,涂布于含Amp(100 μg/mL)的固体LB培养基上;
e. 37℃静置培养。
3) 亚克隆文库的筛选
将文库中的克隆子逐个挑取,接入含Amp(100 μg/mL)的LB液体培养基,37℃振荡培养过夜。吸取过夜菌液1 μL转移至含Amp(100 μg/mL)的固体β-葡萄糖苷酶筛选培养基上,37℃培养14-16 h,菌斑周围出现黑色变色圈,确定为具有β-葡萄糖苷酶活性的亚克隆。
请参见图4,其中出现黑色水解圈的克隆为pUC135B12。
实施例7、亚克隆pUC135-138上表达β-葡萄糖苷酶的基因测序和开放阅读框的分析
基因测序由华大基因(武汉)完成。测序结果分析涉及软件:DNAStar、在线工具Blast (http://www.ncbi.nlm.nih.gov/);SMART (http://smart.embl-heidelberg.de)。
图5为Unglu135B12基因DNA序列分析。序列表中序列1的DNA由片段由3470个碱基组成,请参见图5,从5’端第700位核苷酸开始到3039位核苷酸结束,存在一个完整的开放阅读框 (ORF,Open Reading Frame)。其中,自5’端的第700位至702位核苷酸为Unglu135B12的起始密码子ATG,自5’端的第3037位至3039位核苷酸为Unglu135B12的终止密码子TAG。经过Blast比对,Unglu135B12预测编码蛋白与来自Parabacteroides distasonis的β-glucosidase (YP_001303775.1)相似性为56%;与来自Bacteroides uniformis的hypothetical protein BACUNI_00919(ZP_02069505.1)相似性为56%。Unglu135B12基因编码的780个氨基酸组成的蛋白质,经简单组件结构研究工具SMART(http://smart.embl-heidelberg.de)分析,结果预测从第71-290个氨基酸是糖基水解酶家族3高度保守结构功能域,从第356-642个氨基酸是糖基水解酶家族3C端高度保守结构功能域。
实施例8、基因Unglu135B12重组质粒的表达及功能验证
使用本实验室保存的pET28a表达载体,设计正向扩增引物135B12F:5'-CGGAATTC TCCTTTGTCTACCTTTGTCAG-3',引入EcoR I酶切位点;反向扩增引物 135B12R:5'-ATGCGGCCGCCGAGGTATTTACAAAACACG-3',引入Not I酶切位点。PCR扩增产物与pET28a载体连接后转化大肠杆菌DH5α,并在含X-gal和IPTG的LB固体平板上筛选正向连接的阳性克隆,重组质粒命名为pET135B12。经酶切验证,转化空载体和重组质粒pET135B12经EcoR I、Not I酶切,证实重组质粒构建成功,且经公司测序,与原基因Unglu135B12序列一致,读码框正确。提取重组质粒pET135B12转化至E.coli BL21,得到菌株BL21/ pET135B12。在含有檬酸铁铵、七叶苷和卡那霉素的LB固体平板上培养菌株BL21/ pET135B12 (37℃)16 h后,发现在克隆周围产生了明显的黑色水解圈,说明pET135B12在大肠杆菌中的表达产物具有β-葡萄糖苷酶活性,pET135B12的催化功能域具有独立的催化活性。
请参见图6,提取转化空载体pET28a和转化重组质粒的转化子的质粒,经EcoR I、Not I酶切,证实重组质粒确实插入长度约为2400 bp的外源片段。
请参见图7,其中空载体pET28a转化得到的转化子(图中CK)不能表达β-葡萄糖苷酶活性,在功能验证平板上无黑色显色圈出现。
实施例9、Unglu135B12表达β-葡萄糖苷酶酶学性质初步研究
① β-葡萄糖苷酶最适反应温度的研究:将分离纯化得到的粗酶液与反应底物混合,在不同温度条件下(30℃、35℃、40℃、45℃、50℃、55℃、60℃、65℃)恒温反应10 min,再按1.2.1中方法测定β-葡萄糖苷酶活力,以确定β-葡萄糖苷酶的最适反应温度。如图8所示,该酶的最适温度在35℃-40℃之间,此时酶活力在39.94U-40.98U之间。
② β-葡萄糖苷酶最适反应pH的研究:将分离纯化得到的粗酶液与反应底物混合,加入不同pH的缓冲液(3.2、4、4.5、5、5.5、6、6.5、7、7.5、8、8.5、8.9、10)于最适温度恒温反应10 min,按1.2.1中方法测定β-葡萄糖苷酶活力,以确定酶的最适pH。如图9所示,该酶最适pH为7.0,此时酶活力为43.92U,在pH 4.5-7.5范围,酶活力保持85%以上。
③ β-葡萄糖苷酶活力的测定:采用pNPG法测定β-葡萄糖苷酶活力。由于β-葡萄糖苷酶可水解对硝基苯-β-D-葡萄糖苷(pNPG)生成对硝基苯酚,产物对硝基苯酚在碱性条件下显黄色,因此可通过测定OD405的数值对对硝基苯酚进行定量,进一步可计算β-葡萄糖苷酶活力。酶活力单位规定为(IU):每分钟产生1μmol pNP所需要的酶量。
SEQ ID No:1:DNA序列表为克隆pET135B12所携带外源DNA序列
gattcttgta tactatctgg tagggaaggg gatacccgta ctcgtgatgg agcccgtcaa 60
gggcggcgcg ctggccagcg tcagcgacgg cgtcgcgggc gtgatgcgcg agcgccatcc 120
cgacctgacg cctgcggcga acgccctgac cttcgttggt tcgcttccgg gtgtcatggt 180
caccttgagc ggcatgtcca acatggagca gctcaaggag aatgtctcgg tgttcaccgg 240
cttcaagccc ttcgaccaga aggagatgga cttcatgctt acggtggccg acctccacaa 300
gtccaagggc cagatcccct gcacggcctg caagtactgc atgccctgtc cggcaggcgt 360
ggacatcccc ggcaatttca agatatacaa cagcgccagc gaagccctca tctcttccga 420
gaccgacagg aaggatgtcg ttagcaagcg caacgccttc ctcaagctct acaacgagca 480
ggacaaggcc gttagggcag atgcctgcgt ggcgtgcaac gcctgccttt ccaaatgccc 540
gcagcacatc agcatccccc agcacatgca gcgcatcaaa gacattgtcg ccagcctgta 600
gtttgaacat acagtacaca ttttgaactt ccggctcttt ccggaagccc ttcctttgtc 660
tacctttgtc agacacgaaa ccaaaccaat taccattata tgaaaagaat cttcttgatc 720
gtcgctgcgg gccttatggc gctttccgcc gccgcccagc cgcagctcac caaagacaac 780
attgaggaag tcctcaaagc catgaccctt caggagaagg ccacgctcct cgtcggagga 840
gcccgcgccc agatggtgaa cggcgtcacc tccggtgtcg ccgcccaggt gcccggcgcg 900
gccggcaaca cccgcccgat cgagcgcctc ggcatccccg gcaccgtcct cgccgacggc 960
cctgccggtc tccgcatctc tccgacccgt cagggtacga ccgacacttt ctactgcacc 1020
ggtttcccgg tgggtactct tctcgccagc tcctgggacc ttgacctcgt ccgggcagtt 1080
accaccgcca tgggccagga ggttcacgag tacggcgtag acgtccttct cgccccgggt 1140
atgaacatcc accgcaatcc tctatgcggc cgtaacttcg agtatttctc cgaggatcct 1200
ctcctctccg gaaagatggc cgccgcctat gtcaacggca tccagtccaa caatgtgggc 1260
gtgtccgtca agcactacgc agtgaacaac caggagacca accgcaacga ggacaacgcc 1320
cgcgtcagcg agcgcgctct ccgcgagatc taccttagga acttcgagat agccattaag 1380
gaagccaagc cctggaccgt catgtcctcc tacaaccagc tcaacggcga gtacacccag 1440
cagaagaagg accttctcac caccatcctt cgcgatgagt ggggctttgg cggcatcgtc 1500
atgaccgact ggggtaacaa agcgggtaca gtcaagtccg catgggccgg caacgatctc 1560
atggagcccg gcaaccagaa cgaaatcgac cgcatcgtcg ccggtgtcca ggacggcagc 1620
ctctccatcg aggatgtcga caggaatgtc cgccacatgc tcgagtacat cgtcaagact 1680
ccttcgttca acaagtacaa gtattccaac aaacctgacc ttgccggaca cgcccaggtc 1740
gcccgcaagg ctgccgccga gtccatggtg ctcctccgca acgaggataa cacccttcct 1800
ctcaagggtg gccagaaggt cgctctctac ggcgtttccg ccatcgactt cgttgccggc 1860
ggcaccggtt ccggtgacgt taacaaggcc tatgtcgtga atatggtgca gggacttgag 1920
aatgccggat ttgtcctgga caagggtctg gtggattact acaatgcctt tgccgcttac 1980
gacaaagcgc agagcgcgct ctccggcggc aacaattcct ggttctcgcg ccgcaagctc 2040
gccgagatcg ccatccccga ggctgccatc gccaacgagg cgcgcaacaa tgacgttgcc 2100
gtcatcgtca tcggccgcaa tgccggtgag ggcgccgacc gcaagatgat cgacgacttc 2160
gacctgacta ccgtcgagcg cgagctgatc cgcgacgtca gccttgcctt ccacggacag 2220
ggcaagaagg tcgtcgtcgt gctgaacatc ggaggcgtca tcgagaccaa ctcctggaag 2280
aacagcgtcg acgccatcct ccttccctgg tctcccggcc aggagggcgc caatgccgtc 2340
gccgacgtgc ttctcggcaa ggtcaatcct tccggcaagc tccctatgac cttcccggtc 2400
aacttcatgg accacccgtc ctccgccaac ttcccttaca actacaaccg caacgcccag 2460
cctcagggca tgggtatggg attcggcggc cctcagcagc gtcagctcca gaaggatgtc 2520
gattatacca actatgagga aggcatctac gtcggctacc gctacttcac cactgccggc 2580
aaggaagttt cctatccgtt cggctatggc atgagctaca cctccttctc ctacaccaag 2640
cccgtcgtca aggccgtgtc gggcggcttc gtagccagcg tcaccgtgac caataccggt 2700
gccgtcgccg gcaaggaagt cgtcgagctc tacgtctccg cccctgccgg cggtctcgag 2760
aagcctgcgc gcgagcttcg tggttttgcc aagacccgcg agctcaagcc cggcgagagc 2820
caggtcgtga acatagaggt caccaactac gagatcgctt ccttcaatga agccgcttcc 2880
gcttgggagg ctccggcagg cgcatacaag atctgcttcg gcgccagcgt cgatgacatc 2940
cgcgccaccg ccacctatca gctcaagaag gccgccagct ggaagaccaa caagctcttc 3000
gccctcgacg ccccgctcaa cgagctttcc ctcaagtagg cagcgtgttt tgtaaatacc 3060
tcgttatgag gtgattaaat aaatgtcccc ctccgttttt ggagggggac gtttgtttat 3120
gttgttgatt tactgaaagt tacaaaacac ggagtttgta tcgtcctaaa aaaagtttac 3180
caccaaaggt aagtttttat ggaagctaaa tgctatcggg cgatgcagcg tgcccaagga 3240
aagatgctgc gtgagtattt ctccggagta ccggtggaga acctgtcaaa gcgatacgga 3300
tacagtgtcc taaaaataaa gacgcttgca tccgattaca aacaagggaa aattgatatc 3360
tttgacaatc cgcagaaacg tcggataact atgtcgatta tgacccacca ggaagaagta 3420
caattactgc aggacaagat caaggcgctg gagaacgcct gaagctggcg 3470
SEQ ID No:2:基因Unglu135B12翻译氨基酸序列
1 MET Lys Arg Ile Phe Leu Ile Val Ala Ala Gly Leu MET Ala Leu Ser Ala Ala Ala Gln
21 Pro Gln Leu Thr Lys Asp Asn Ile Glu Glu Val Leu Lys Ala MET Thr Leu Gln Glu Lys
41 Ala Thr Leu Leu Val Gly Gly Ala Arg Ala Gln MET Val Asn Gly Val Thr Ser Gly Val
61 Ala Ala Gln Val Pro Gly Ala Ala Gly Asn Thr Arg Pro Ile Glu Arg Leu Gly Ile Pro
81 Gly Thr Val Leu Ala Asp Gly Pro Ala Gly Leu Arg Ile Ser Pro Thr Arg Gln Gly Thr
101 Thr Asp Thr Phe Tyr Cys Thr Gly Phe Pro Val Gly Thr Leu Leu Ala Ser Ser Trp Asp
121 Leu Asp Leu Val Arg Ala Val Thr Thr Ala MET Gly Gln Glu Val His Glu Tyr Gly Val
141 Asp Val Leu Leu Ala Pro Gly MET Asn Ile His Arg Asn Pro Leu Cys Gly Arg Asn Phe
161 Glu Tyr Phe Ser Glu Asp Pro Leu Leu Ser Gly Lys MET Ala Ala Ala Tyr Val Asn Gly
181 Ile Gln Ser Asn Asn Val Gly Val Ser Val Lys His Tyr Ala Val Asn Asn Gln Glu Thr
201 Asn Arg Asn Glu Asp Asn Ala Arg Val Ser Glu Arg Ala Leu Arg Glu Ile Tyr Leu Arg
221 Asn Phe Glu Ile Ala Ile Lys Glu Ala Lys Pro Trp Thr Val MET Ser Ser Tyr Asn Gln
241 Leu Asn Gly Glu Tyr Thr Gln Gln Lys Lys Asp Leu Leu Thr Thr Ile Leu Arg Asp Glu
261 Trp Gly Phe Gly Gly Ile Val MET Thr Asp Trp Gly Asn Lys Ala Gly Thr Val Lys Ser
281 Ala Trp Ala Gly Asn Asp Leu MET Glu Pro Gly Asn Gln Asn Glu Ile Asp Arg Ile Val
301 Ala Gly Val Gln Asp Gly Ser Leu Ser Ile Glu Asp Val Asp Arg Asn Val Arg His MET
321 Leu Glu Tyr Ile Val Lys Thr Pro Ser Phe Asn Lys Tyr Lys Tyr Ser Asn Lys Pro Asp
341 Leu Ala Gly His Ala Gln Val Ala Arg Lys Ala Ala Ala Glu Ser MET Val Leu Leu Arg
361 Asn Glu Asp Asn Thr Leu Pro Leu Lys Gly Gly Gln Lys Val Ala Leu Tyr Gly Val Ser
381 Ala Ile Asp Phe Val Ala Gly Gly Thr Gly Ser Gly Asp Val Asn Lys Ala Tyr Val Val
401 Asn MET Val Gln Gly Leu Glu Asn Ala Gly Phe Val Leu Asp Lys Gly Leu Val Asp Tyr
421 Tyr Asn Ala Phe Ala Ala Tyr Asp Lys Ala Gln Ser Ala Leu Ser Gly Gly Asn Asn Ser
441 Trp Phe Ser Arg Arg Lys Leu Ala Glu Ile Ala Ile Pro Glu Ala Ala Ile Ala Asn Glu
461 Ala Arg Asn Asn Asp Val Ala Val Ile Val Ile Gly Arg Asn Ala Gly Glu Gly Ala Asp
481 Arg Lys MET Ile Asp Asp Phe Asp Leu Thr Thr Val Glu Arg Glu Leu Ile Arg Asp Val
501 Ser Leu Ala Phe His Gly Gln Gly Lys Lys Val Val Val Val Leu Asn Ile Gly Gly Val
521 Ile Glu Thr Asn Ser Trp Lys Asn Ser Val Asp Ala Ile Leu Leu Pro Trp Ser Pro Gly
541 Gln Glu Gly Ala Asn Ala Val Ala Asp Val Leu Leu Gly Lys Val Asn Pro Ser Gly Lys
561 Leu Pro MET Thr Phe Pro Val Asn Phe MET Asp His Pro Ser Ser Ala Asn Phe Pro Tyr
581 Asn Tyr Asn Arg Asn Ala Gln Pro Gln Gly MET Gly MET Gly Phe Gly Gly Pro Gln Gln
601 Arg Gln Leu Gln Lys Asp Val Asp Tyr Thr Asn Tyr Glu Glu Gly Ile Tyr Val Gly Tyr
621 Arg Tyr Phe Thr Thr Ala Gly Lys Glu Val Ser Tyr Pro Phe Gly Tyr Gly MET Ser Tyr
641 Thr Ser Phe Ser Tyr Thr Lys Pro Val Val Lys Ala Val Ser Gly Gly Phe Val Ala Ser
661 Val Thr Val Thr Asn Thr Gly Ala Val Ala Gly Lys Glu Val Val Glu Leu Tyr Val Ser
681 Ala Pro Ala Gly Gly Leu Glu Lys Pro Ala Arg Glu Leu Arg Gly Phe Ala Lys Thr Arg
701 Glu Leu Lys Pro Gly Glu Ser Gln Val Val Asn Ile Glu Val Thr Asn Tyr Glu Ile Ala
721 Ser Phe Asn Glu Ala Ala Ser Ala Trp Glu Ala Pro Ala Gly Ala Tyr Lys Ile Cys Phe
741 Gly Ala Ser Val Asp Asp Ile Arg Ala Thr Ala Thr Tyr Gln Leu Lys Lys Ala Ala Ser
761 Trp Lys Thr Asn Lys Leu Phe Ala Leu Asp Ala Pro Leu Asn Glu Leu Ser Leu Lys ***
SEQ ID No:3:基因Unglu135B12翻译氨基酸序列的部分序列
1 Thr Arg Pro Ile Glu Arg Leu Gly Ile Pro Gly Thr Val Leu Ala Asp Gly Pro Ala Gly
21 Leu Arg Ile Ser Pro Thr Arg Gln Gly Thr Thr Asp Thr Phe Tyr Cys Thr Gly Phe Pro
41 Val Gly Thr Leu Leu Ala Ser Ser Trp Asp Leu Asp Leu Val Arg Ala Val Thr Thr Ala
61 MET Gly Gln Glu Val His Glu Tyr Gly Val Asp Val Leu Leu Ala Pro Gly MET Asn Ile
81 His Arg Asn Pro Leu Cys Gly Arg Asn Phe Glu Tyr Phe Ser Glu Asp Pro Leu Leu Ser
101 Gly Lys MET Ala Ala Ala Tyr Val Asn Gly Ile Gln Ser Asn Asn Val Gly Val Ser Val
121 Lys His Tyr Ala Val Asn Asn Gln Glu Thr Asn Arg Asn Glu Asp Asn Ala Arg Val Ser
141 Glu Arg Ala Leu Arg Glu Ile Tyr Leu Arg Asn Phe Glu Ile Ala Ile Lys Glu Ala Lys
161 Pro Trp Thr Val MET Ser Ser Tyr Asn Gln Leu Asn Gly Glu Tyr Thr Gln Gln Lys Lys
181 Asp Leu Leu Thr Thr Ile Leu Arg Asp Glu Trp Gly Phe Gly Gly Ile Val MET Thr Asp
201 Trp Gly Asn Lys Ala Gly Thr Val Lys Ser Ala Trp Ala Gly Asn Asp Leu MET Glu Pro
SEQ ID No:4:基因Unglu135B12翻译氨基酸序列的部分序列
1 MET Val Leu Leu Arg Asn Glu Asp Asn Thr Leu Pro Leu Lys Gly Gly Gln Lys Val Ala
21 Leu Tyr Gly Val Ser Ala Ile Asp Phe Val Ala Gly Gly Thr Gly Ser Gly Asp Val Asn
41 Lys Ala Tyr Val Val Asn MET Val Gln Gly Leu Glu Asn Ala Gly Phe Val Leu Asp Lys
61 Gly Leu Val Asp Tyr Tyr Asn Ala Phe Ala Ala Tyr Asp Lys Ala Gln Ser Ala Leu Ser
81 Gly Gly Asn Asn Ser Trp Phe Ser Arg Arg Lys Leu Ala Glu Ile Ala Ile Pro Glu Ala
101 Ala Ile Ala Asn Glu Ala Arg Asn Asn Asp Val Ala Val Ile Val Ile Gly Arg Asn Ala
121 Gly Glu Gly Ala Asp Arg Lys MET Ile Asp Asp Phe Asp Leu Thr Thr Val Glu Arg Glu
141 Leu Ile Arg Asp Val Ser Leu Ala Phe His Gly Gln Gly Lys Lys Val Val Val Val Leu
161 Asn Ile Gly Gly Val Ile Glu Thr Asn Ser Trp Lys Asn Ser Val Asp Ala Ile Leu Leu
181 Pro Trp Ser Pro Gly Gln Glu Gly Ala Asn Ala Val Ala Asp Val Leu Leu Gly Lys Val
201 Asn Pro Ser Gly Lys Leu Pro MET Thr Phe Pro Val Asn Phe MET Asp His Pro Ser Ser
221 Ala Asn Phe Pro Tyr Asn Tyr Asn Arg Asn Ala Gln Pro Gln Gly MET Gly MET Gly Phe
241 Gly Gly Pro Gln Gln Arg Gln Leu Gln Lys Asp Val Asp Tyr Thr Asn Tyr Glu Glu Gly
261 Ile Tyr Val Gly Tyr Arg Tyr Phe Thr Thr Ala Gly Lys Glu Val Ser Tyr Pro Phe Gly
281 Tyr Gly MET Ser Tyr Thr Ser
SEQUENCE LISTING
<110> 湖南农业大学
<120> 一种编码β-葡萄糖苷酶的基因及其应用
<130> 2012
<160> 6
<170> PatentIn version 3.5
<210> 1
<211> 3470
<212> DNA
<213> 牛瘤胃细菌
<400> 1
gattcttgta tactatctgg tagggaaggg gatacccgta ctcgtgatgg agcccgtcaa 60
gggcggcgcg ctggccagcg tcagcgacgg cgtcgcgggc gtgatgcgcg agcgccatcc 120
cgacctgacg cctgcggcga acgccctgac cttcgttggt tcgcttccgg gtgtcatggt 180
caccttgagc ggcatgtcca acatggagca gctcaaggag aatgtctcgg tgttcaccgg 240
cttcaagccc ttcgaccaga aggagatgga cttcatgctt acggtggccg acctccacaa 300
gtccaagggc cagatcccct gcacggcctg caagtactgc atgccctgtc cggcaggcgt 360
ggacatcccc ggcaatttca agatatacaa cagcgccagc gaagccctca tctcttccga 420
gaccgacagg aaggatgtcg ttagcaagcg caacgccttc ctcaagctct acaacgagca 480
ggacaaggcc gttagggcag atgcctgcgt ggcgtgcaac gcctgccttt ccaaatgccc 540
gcagcacatc agcatccccc agcacatgca gcgcatcaaa gacattgtcg ccagcctgta 600
gtttgaacat acagtacaca ttttgaactt ccggctcttt ccggaagccc ttcctttgtc 660
tacctttgtc agacacgaaa ccaaaccaat taccattata tgaaaagaat cttcttgatc 720
gtcgctgcgg gccttatggc gctttccgcc gccgcccagc cgcagctcac caaagacaac 780
attgaggaag tcctcaaagc catgaccctt caggagaagg ccacgctcct cgtcggagga 840
gcccgcgccc agatggtgaa cggcgtcacc tccggtgtcg ccgcccaggt gcccggcgcg 900
gccggcaaca cccgcccgat cgagcgcctc ggcatccccg gcaccgtcct cgccgacggc 960
cctgccggtc tccgcatctc tccgacccgt cagggtacga ccgacacttt ctactgcacc 1020
ggtttcccgg tgggtactct tctcgccagc tcctgggacc ttgacctcgt ccgggcagtt 1080
accaccgcca tgggccagga ggttcacgag tacggcgtag acgtccttct cgccccgggt 1140
atgaacatcc accgcaatcc tctatgcggc cgtaacttcg agtatttctc cgaggatcct 1200
ctcctctccg gaaagatggc cgccgcctat gtcaacggca tccagtccaa caatgtgggc 1260
gtgtccgtca agcactacgc agtgaacaac caggagacca accgcaacga ggacaacgcc 1320
cgcgtcagcg agcgcgctct ccgcgagatc taccttagga acttcgagat agccattaag 1380
gaagccaagc cctggaccgt catgtcctcc tacaaccagc tcaacggcga gtacacccag 1440
cagaagaagg accttctcac caccatcctt cgcgatgagt ggggctttgg cggcatcgtc 1500
atgaccgact ggggtaacaa agcgggtaca gtcaagtccg catgggccgg caacgatctc 1560
atggagcccg gcaaccagaa cgaaatcgac cgcatcgtcg ccggtgtcca ggacggcagc 1620
ctctccatcg aggatgtcga caggaatgtc cgccacatgc tcgagtacat cgtcaagact 1680
ccttcgttca acaagtacaa gtattccaac aaacctgacc ttgccggaca cgcccaggtc 1740
gcccgcaagg ctgccgccga gtccatggtg ctcctccgca acgaggataa cacccttcct 1800
ctcaagggtg gccagaaggt cgctctctac ggcgtttccg ccatcgactt cgttgccggc 1860
ggcaccggtt ccggtgacgt taacaaggcc tatgtcgtga atatggtgca gggacttgag 1920
aatgccggat ttgtcctgga caagggtctg gtggattact acaatgcctt tgccgcttac 1980
gacaaagcgc agagcgcgct ctccggcggc aacaattcct ggttctcgcg ccgcaagctc 2040
gccgagatcg ccatccccga ggctgccatc gccaacgagg cgcgcaacaa tgacgttgcc 2100
gtcatcgtca tcggccgcaa tgccggtgag ggcgccgacc gcaagatgat cgacgacttc 2160
gacctgacta ccgtcgagcg cgagctgatc cgcgacgtca gccttgcctt ccacggacag 2220
ggcaagaagg tcgtcgtcgt gctgaacatc ggaggcgtca tcgagaccaa ctcctggaag 2280
aacagcgtcg acgccatcct ccttccctgg tctcccggcc aggagggcgc caatgccgtc 2340
gccgacgtgc ttctcggcaa ggtcaatcct tccggcaagc tccctatgac cttcccggtc 2400
aacttcatgg accacccgtc ctccgccaac ttcccttaca actacaaccg caacgcccag 2460
cctcagggca tgggtatggg attcggcggc cctcagcagc gtcagctcca gaaggatgtc 2520
gattatacca actatgagga aggcatctac gtcggctacc gctacttcac cactgccggc 2580
aaggaagttt cctatccgtt cggctatggc atgagctaca cctccttctc ctacaccaag 2640
cccgtcgtca aggccgtgtc gggcggcttc gtagccagcg tcaccgtgac caataccggt 2700
gccgtcgccg gcaaggaagt cgtcgagctc tacgtctccg cccctgccgg cggtctcgag 2760
aagcctgcgc gcgagcttcg tggttttgcc aagacccgcg agctcaagcc cggcgagagc 2820
caggtcgtga acatagaggt caccaactac gagatcgctt ccttcaatga agccgcttcc 2880
gcttgggagg ctccggcagg cgcatacaag atctgcttcg gcgccagcgt cgatgacatc 2940
cgcgccaccg ccacctatca gctcaagaag gccgccagct ggaagaccaa caagctcttc 3000
gccctcgacg ccccgctcaa cgagctttcc ctcaagtagg cagcgtgttt tgtaaatacc 3060
tcgttatgag gtgattaaat aaatgtcccc ctccgttttt ggagggggac gtttgtttat 3120
gttgttgatt tactgaaagt tacaaaacac ggagtttgta tcgtcctaaa aaaagtttac 3180
caccaaaggt aagtttttat ggaagctaaa tgctatcggg cgatgcagcg tgcccaagga 3240
aagatgctgc gtgagtattt ctccggagta ccggtggaga acctgtcaaa gcgatacgga 3300
tacagtgtcc taaaaataaa gacgcttgca tccgattaca aacaagggaa aattgatatc 3360
tttgacaatc cgcagaaacg tcggataact atgtcgatta tgacccacca ggaagaagta 3420
caattactgc aggacaagat caaggcgctg gagaacgcct gaagctggcg 3470
<210> 2
<211> 3470
<212> PRT
<213> Unglu135B12基因的氨基酸序列
<400> 2
Gly Ala Thr Thr Cys Thr Thr Gly Thr Ala Thr Ala Cys Thr Ala Thr
1 5 10 15
Cys Thr Gly Gly Thr Ala Gly Gly Gly Ala Ala Gly Gly Gly Gly Ala
20 25 30
Thr Ala Cys Cys Cys Gly Thr Ala Cys Thr Cys Gly Thr Gly Ala Thr
35 40 45
Gly Gly Ala Gly Cys Cys Cys Gly Thr Cys Ala Ala Gly Gly Gly Cys
50 55 60
Gly Gly Cys Gly Cys Gly Cys Thr Gly Gly Cys Cys Ala Gly Cys Gly
65 70 75 80
Thr Cys Ala Gly Cys Gly Ala Cys Gly Gly Cys Gly Thr Cys Gly Cys
85 90 95
Gly Gly Gly Cys Gly Thr Gly Ala Thr Gly Cys Gly Cys Gly Ala Gly
100 105 110
Cys Gly Cys Cys Ala Thr Cys Cys Cys Gly Ala Cys Cys Thr Gly Ala
115 120 125
Cys Gly Cys Cys Thr Gly Cys Gly Gly Cys Gly Ala Ala Cys Gly Cys
130 135 140
Cys Cys Thr Gly Ala Cys Cys Thr Thr Cys Gly Thr Thr Gly Gly Thr
145 150 155 160
Thr Cys Gly Cys Thr Thr Cys Cys Gly Gly Gly Thr Gly Thr Cys Ala
165 170 175
Thr Gly Gly Thr Cys Ala Cys Cys Thr Thr Gly Ala Gly Cys Gly Gly
180 185 190
Cys Ala Thr Gly Thr Cys Cys Ala Ala Cys Ala Thr Gly Gly Ala Gly
195 200 205
Cys Ala Gly Cys Thr Cys Ala Ala Gly Gly Ala Gly Ala Ala Thr Gly
210 215 220
Thr Cys Thr Cys Gly Gly Thr Gly Thr Thr Cys Ala Cys Cys Gly Gly
225 230 235 240
Cys Thr Thr Cys Ala Ala Gly Cys Cys Cys Thr Thr Cys Gly Ala Cys
245 250 255
Cys Ala Gly Ala Ala Gly Gly Ala Gly Ala Thr Gly Gly Ala Cys Thr
260 265 270
Thr Cys Ala Thr Gly Cys Thr Thr Ala Cys Gly Gly Thr Gly Gly Cys
275 280 285
Cys Gly Ala Cys Cys Thr Cys Cys Ala Cys Ala Ala Gly Thr Cys Cys
290 295 300
Ala Ala Gly Gly Gly Cys Cys Ala Gly Ala Thr Cys Cys Cys Cys Thr
305 310 315 320
Gly Cys Ala Cys Gly Gly Cys Cys Thr Gly Cys Ala Ala Gly Thr Ala
325 330 335
Cys Thr Gly Cys Ala Thr Gly Cys Cys Cys Thr Gly Thr Cys Cys Gly
340 345 350
Gly Cys Ala Gly Gly Cys Gly Thr Gly Gly Ala Cys Ala Thr Cys Cys
355 360 365
Cys Cys Gly Gly Cys Ala Ala Thr Thr Thr Cys Ala Ala Gly Ala Thr
370 375 380
Ala Thr Ala Cys Ala Ala Cys Ala Gly Cys Gly Cys Cys Ala Gly Cys
385 390 395 400
Gly Ala Ala Gly Cys Cys Cys Thr Cys Ala Thr Cys Thr Cys Thr Thr
405 410 415
Cys Cys Gly Ala Gly Ala Cys Cys Gly Ala Cys Ala Gly Gly Ala Ala
420 425 430
Gly Gly Ala Thr Gly Thr Cys Gly Thr Thr Ala Gly Cys Ala Ala Gly
435 440 445
Cys Gly Cys Ala Ala Cys Gly Cys Cys Thr Thr Cys Cys Thr Cys Ala
450 455 460
Ala Gly Cys Thr Cys Thr Ala Cys Ala Ala Cys Gly Ala Gly Cys Ala
465 470 475 480
Gly Gly Ala Cys Ala Ala Gly Gly Cys Cys Gly Thr Thr Ala Gly Gly
485 490 495
Gly Cys Ala Gly Ala Thr Gly Cys Cys Thr Gly Cys Gly Thr Gly Gly
500 505 510
Cys Gly Thr Gly Cys Ala Ala Cys Gly Cys Cys Thr Gly Cys Cys Thr
515 520 525
Thr Thr Cys Cys Ala Ala Ala Thr Gly Cys Cys Cys Gly Cys Ala Gly
530 535 540
Cys Ala Cys Ala Thr Cys Ala Gly Cys Ala Thr Cys Cys Cys Cys Cys
545 550 555 560
Ala Gly Cys Ala Cys Ala Thr Gly Cys Ala Gly Cys Gly Cys Ala Thr
565 570 575
Cys Ala Ala Ala Gly Ala Cys Ala Thr Thr Gly Thr Cys Gly Cys Cys
580 585 590
Ala Gly Cys Cys Thr Gly Thr Ala Gly Thr Thr Thr Gly Ala Ala Cys
595 600 605
Ala Thr Ala Cys Ala Gly Thr Ala Cys Ala Cys Ala Thr Thr Thr Thr
610 615 620
Gly Ala Ala Cys Thr Thr Cys Cys Gly Gly Cys Thr Cys Thr Thr Thr
625 630 635 640
Cys Cys Gly Gly Ala Ala Gly Cys Cys Cys Thr Thr Cys Cys Thr Thr
645 650 655
Thr Gly Thr Cys Thr Ala Cys Cys Thr Thr Thr Gly Thr Cys Ala Gly
660 665 670
Ala Cys Ala Cys Gly Ala Ala Ala Cys Cys Ala Ala Ala Cys Cys Ala
675 680 685
Ala Thr Thr Ala Cys Cys Ala Thr Thr Ala Thr Ala Thr Gly Ala Ala
690 695 700
Ala Ala Gly Ala Ala Thr Cys Thr Thr Cys Thr Thr Gly Ala Thr Cys
705 710 715 720
Gly Thr Cys Gly Cys Thr Gly Cys Gly Gly Gly Cys Cys Thr Thr Ala
725 730 735
Thr Gly Gly Cys Gly Cys Thr Thr Thr Cys Cys Gly Cys Cys Gly Cys
740 745 750
Cys Gly Cys Cys Cys Ala Gly Cys Cys Gly Cys Ala Gly Cys Thr Cys
755 760 765
Ala Cys Cys Ala Ala Ala Gly Ala Cys Ala Ala Cys Ala Thr Thr Gly
770 775 780
Ala Gly Gly Ala Ala Gly Thr Cys Cys Thr Cys Ala Ala Ala Gly Cys
785 790 795 800
Cys Ala Thr Gly Ala Cys Cys Cys Thr Thr Cys Ala Gly Gly Ala Gly
805 810 815
Ala Ala Gly Gly Cys Cys Ala Cys Gly Cys Thr Cys Cys Thr Cys Gly
820 825 830
Thr Cys Gly Gly Ala Gly Gly Ala Gly Cys Cys Cys Gly Cys Gly Cys
835 840 845
Cys Cys Ala Gly Ala Thr Gly Gly Thr Gly Ala Ala Cys Gly Gly Cys
850 855 860
Gly Thr Cys Ala Cys Cys Thr Cys Cys Gly Gly Thr Gly Thr Cys Gly
865 870 875 880
Cys Cys Gly Cys Cys Cys Ala Gly Gly Thr Gly Cys Cys Cys Gly Gly
885 890 895
Cys Gly Cys Gly Gly Cys Cys Gly Gly Cys Ala Ala Cys Ala Cys Cys
900 905 910
Cys Gly Cys Cys Cys Gly Ala Thr Cys Gly Ala Gly Cys Gly Cys Cys
915 920 925
Thr Cys Gly Gly Cys Ala Thr Cys Cys Cys Cys Gly Gly Cys Ala Cys
930 935 940
Cys Gly Thr Cys Cys Thr Cys Gly Cys Cys Gly Ala Cys Gly Gly Cys
945 950 955 960
Cys Cys Thr Gly Cys Cys Gly Gly Thr Cys Thr Cys Cys Gly Cys Ala
965 970 975
Thr Cys Thr Cys Thr Cys Cys Gly Ala Cys Cys Cys Gly Thr Cys Ala
980 985 990
Gly Gly Gly Thr Ala Cys Gly Ala Cys Cys Gly Ala Cys Ala Cys Thr
995 1000 1005
Thr Thr Cys Thr Ala Cys Thr Gly Cys Ala Cys Cys Gly Gly Thr
1010 1015 1020
Thr Thr Cys Cys Cys Gly Gly Thr Gly Gly Gly Thr Ala Cys Thr
1025 1030 1035
Cys Thr Thr Cys Thr Cys Gly Cys Cys Ala Gly Cys Thr Cys Cys
1040 1045 1050
Thr Gly Gly Gly Ala Cys Cys Thr Thr Gly Ala Cys Cys Thr Cys
1055 1060 1065
Gly Thr Cys Cys Gly Gly Gly Cys Ala Gly Thr Thr Ala Cys Cys
1070 1075 1080
Ala Cys Cys Gly Cys Cys Ala Thr Gly Gly Gly Cys Cys Ala Gly
1085 1090 1095
Gly Ala Gly Gly Thr Thr Cys Ala Cys Gly Ala Gly Thr Ala Cys
1100 1105 1110
Gly Gly Cys Gly Thr Ala Gly Ala Cys Gly Thr Cys Cys Thr Thr
1115 1120 1125
Cys Thr Cys Gly Cys Cys Cys Cys Gly Gly Gly Thr Ala Thr Gly
1130 1135 1140
Ala Ala Cys Ala Thr Cys Cys Ala Cys Cys Gly Cys Ala Ala Thr
1145 1150 1155
Cys Cys Thr Cys Thr Ala Thr Gly Cys Gly Gly Cys Cys Gly Thr
1160 1165 1170
Ala Ala Cys Thr Thr Cys Gly Ala Gly Thr Ala Thr Thr Thr Cys
1175 1180 1185
Thr Cys Cys Gly Ala Gly Gly Ala Thr Cys Cys Thr Cys Thr Cys
1190 1195 1200
Cys Thr Cys Thr Cys Cys Gly Gly Ala Ala Ala Gly Ala Thr Gly
1205 1210 1215
Gly Cys Cys Gly Cys Cys Gly Cys Cys Thr Ala Thr Gly Thr Cys
1220 1225 1230
Ala Ala Cys Gly Gly Cys Ala Thr Cys Cys Ala Gly Thr Cys Cys
1235 1240 1245
Ala Ala Cys Ala Ala Thr Gly Thr Gly Gly Gly Cys Gly Thr Gly
1250 1255 1260
Thr Cys Cys Gly Thr Cys Ala Ala Gly Cys Ala Cys Thr Ala Cys
1265 1270 1275
Gly Cys Ala Gly Thr Gly Ala Ala Cys Ala Ala Cys Cys Ala Gly
1280 1285 1290
Gly Ala Gly Ala Cys Cys Ala Ala Cys Cys Gly Cys Ala Ala Cys
1295 1300 1305
Gly Ala Gly Gly Ala Cys Ala Ala Cys Gly Cys Cys Cys Gly Cys
1310 1315 1320
Gly Thr Cys Ala Gly Cys Gly Ala Gly Cys Gly Cys Gly Cys Thr
1325 1330 1335
Cys Thr Cys Cys Gly Cys Gly Ala Gly Ala Thr Cys Thr Ala Cys
1340 1345 1350
Cys Thr Thr Ala Gly Gly Ala Ala Cys Thr Thr Cys Gly Ala Gly
1355 1360 1365
Ala Thr Ala Gly Cys Cys Ala Thr Thr Ala Ala Gly Gly Ala Ala
1370 1375 1380
Gly Cys Cys Ala Ala Gly Cys Cys Cys Thr Gly Gly Ala Cys Cys
1385 1390 1395
Gly Thr Cys Ala Thr Gly Thr Cys Cys Thr Cys Cys Thr Ala Cys
1400 1405 1410
Ala Ala Cys Cys Ala Gly Cys Thr Cys Ala Ala Cys Gly Gly Cys
1415 1420 1425
Gly Ala Gly Thr Ala Cys Ala Cys Cys Cys Ala Gly Cys Ala Gly
1430 1435 1440
Ala Ala Gly Ala Ala Gly Gly Ala Cys Cys Thr Thr Cys Thr Cys
1445 1450 1455
Ala Cys Cys Ala Cys Cys Ala Thr Cys Cys Thr Thr Cys Gly Cys
1460 1465 1470
Gly Ala Thr Gly Ala Gly Thr Gly Gly Gly Gly Cys Thr Thr Thr
1475 1480 1485
Gly Gly Cys Gly Gly Cys Ala Thr Cys Gly Thr Cys Ala Thr Gly
1490 1495 1500
Ala Cys Cys Gly Ala Cys Thr Gly Gly Gly Gly Thr Ala Ala Cys
1505 1510 1515
Ala Ala Ala Gly Cys Gly Gly Gly Thr Ala Cys Ala Gly Thr Cys
1520 1525 1530
Ala Ala Gly Thr Cys Cys Gly Cys Ala Thr Gly Gly Gly Cys Cys
1535 1540 1545
Gly Gly Cys Ala Ala Cys Gly Ala Thr Cys Thr Cys Ala Thr Gly
1550 1555 1560
Gly Ala Gly Cys Cys Cys Gly Gly Cys Ala Ala Cys Cys Ala Gly
1565 1570 1575
Ala Ala Cys Gly Ala Ala Ala Thr Cys Gly Ala Cys Cys Gly Cys
1580 1585 1590
Ala Thr Cys Gly Thr Cys Gly Cys Cys Gly Gly Thr Gly Thr Cys
1595 1600 1605
Cys Ala Gly Gly Ala Cys Gly Gly Cys Ala Gly Cys Cys Thr Cys
1610 1615 1620
Thr Cys Cys Ala Thr Cys Gly Ala Gly Gly Ala Thr Gly Thr Cys
1625 1630 1635
Gly Ala Cys Ala Gly Gly Ala Ala Thr Gly Thr Cys Cys Gly Cys
1640 1645 1650
Cys Ala Cys Ala Thr Gly Cys Thr Cys Gly Ala Gly Thr Ala Cys
1655 1660 1665
Ala Thr Cys Gly Thr Cys Ala Ala Gly Ala Cys Thr Cys Cys Thr
1670 1675 1680
Thr Cys Gly Thr Thr Cys Ala Ala Cys Ala Ala Gly Thr Ala Cys
1685 1690 1695
Ala Ala Gly Thr Ala Thr Thr Cys Cys Ala Ala Cys Ala Ala Ala
1700 1705 1710
Cys Cys Thr Gly Ala Cys Cys Thr Thr Gly Cys Cys Gly Gly Ala
1715 1720 1725
Cys Ala Cys Gly Cys Cys Cys Ala Gly Gly Thr Cys Gly Cys Cys
1730 1735 1740
Cys Gly Cys Ala Ala Gly Gly Cys Thr Gly Cys Cys Gly Cys Cys
1745 1750 1755
Gly Ala Gly Thr Cys Cys Ala Thr Gly Gly Thr Gly Cys Thr Cys
1760 1765 1770
Cys Thr Cys Cys Gly Cys Ala Ala Cys Gly Ala Gly Gly Ala Thr
1775 1780 1785
Ala Ala Cys Ala Cys Cys Cys Thr Thr Cys Cys Thr Cys Thr Cys
1790 1795 1800
Ala Ala Gly Gly Gly Thr Gly Gly Cys Cys Ala Gly Ala Ala Gly
1805 1810 1815
Gly Thr Cys Gly Cys Thr Cys Thr Cys Thr Ala Cys Gly Gly Cys
1820 1825 1830
Gly Thr Thr Thr Cys Cys Gly Cys Cys Ala Thr Cys Gly Ala Cys
1835 1840 1845
Thr Thr Cys Gly Thr Thr Gly Cys Cys Gly Gly Cys Gly Gly Cys
1850 1855 1860
Ala Cys Cys Gly Gly Thr Thr Cys Cys Gly Gly Thr Gly Ala Cys
1865 1870 1875
Gly Thr Thr Ala Ala Cys Ala Ala Gly Gly Cys Cys Thr Ala Thr
1880 1885 1890
Gly Thr Cys Gly Thr Gly Ala Ala Thr Ala Thr Gly Gly Thr Gly
1895 1900 1905
Cys Ala Gly Gly Gly Ala Cys Thr Thr Gly Ala Gly Ala Ala Thr
1910 1915 1920
Gly Cys Cys Gly Gly Ala Thr Thr Thr Gly Thr Cys Cys Thr Gly
1925 1930 1935
Gly Ala Cys Ala Ala Gly Gly Gly Thr Cys Thr Gly Gly Thr Gly
1940 1945 1950
Gly Ala Thr Thr Ala Cys Thr Ala Cys Ala Ala Thr Gly Cys Cys
1955 1960 1965
Thr Thr Thr Gly Cys Cys Gly Cys Thr Thr Ala Cys Gly Ala Cys
1970 1975 1980
Ala Ala Ala Gly Cys Gly Cys Ala Gly Ala Gly Cys Gly Cys Gly
1985 1990 1995
Cys Thr Cys Thr Cys Cys Gly Gly Cys Gly Gly Cys Ala Ala Cys
2000 2005 2010
Ala Ala Thr Thr Cys Cys Thr Gly Gly Thr Thr Cys Thr Cys Gly
2015 2020 2025
Cys Gly Cys Cys Gly Cys Ala Ala Gly Cys Thr Cys Gly Cys Cys
2030 2035 2040
Gly Ala Gly Ala Thr Cys Gly Cys Cys Ala Thr Cys Cys Cys Cys
2045 2050 2055
Gly Ala Gly Gly Cys Thr Gly Cys Cys Ala Thr Cys Gly Cys Cys
2060 2065 2070
Ala Ala Cys Gly Ala Gly Gly Cys Gly Cys Gly Cys Ala Ala Cys
2075 2080 2085
Ala Ala Thr Gly Ala Cys Gly Thr Thr Gly Cys Cys Gly Thr Cys
2090 2095 2100
Ala Thr Cys Gly Thr Cys Ala Thr Cys Gly Gly Cys Cys Gly Cys
2105 2110 2115
Ala Ala Thr Gly Cys Cys Gly Gly Thr Gly Ala Gly Gly Gly Cys
2120 2125 2130
Gly Cys Cys Gly Ala Cys Cys Gly Cys Ala Ala Gly Ala Thr Gly
2135 2140 2145
Ala Thr Cys Gly Ala Cys Gly Ala Cys Thr Thr Cys Gly Ala Cys
2150 2155 2160
Cys Thr Gly Ala Cys Thr Ala Cys Cys Gly Thr Cys Gly Ala Gly
2165 2170 2175
Cys Gly Cys Gly Ala Gly Cys Thr Gly Ala Thr Cys Cys Gly Cys
2180 2185 2190
Gly Ala Cys Gly Thr Cys Ala Gly Cys Cys Thr Thr Gly Cys Cys
2195 2200 2205
Thr Thr Cys Cys Ala Cys Gly Gly Ala Cys Ala Gly Gly Gly Cys
2210 2215 2220
Ala Ala Gly Ala Ala Gly Gly Thr Cys Gly Thr Cys Gly Thr Cys
2225 2230 2235
Gly Thr Gly Cys Thr Gly Ala Ala Cys Ala Thr Cys Gly Gly Ala
2240 2245 2250
Gly Gly Cys Gly Thr Cys Ala Thr Cys Gly Ala Gly Ala Cys Cys
2255 2260 2265
Ala Ala Cys Thr Cys Cys Thr Gly Gly Ala Ala Gly Ala Ala Cys
2270 2275 2280
Ala Gly Cys Gly Thr Cys Gly Ala Cys Gly Cys Cys Ala Thr Cys
2285 2290 2295
Cys Thr Cys Cys Thr Thr Cys Cys Cys Thr Gly Gly Thr Cys Thr
2300 2305 2310
Cys Cys Cys Gly Gly Cys Cys Ala Gly Gly Ala Gly Gly Gly Cys
2315 2320 2325
Gly Cys Cys Ala Ala Thr Gly Cys Cys Gly Thr Cys Gly Cys Cys
2330 2335 2340
Gly Ala Cys Gly Thr Gly Cys Thr Thr Cys Thr Cys Gly Gly Cys
2345 2350 2355
Ala Ala Gly Gly Thr Cys Ala Ala Thr Cys Cys Thr Thr Cys Cys
2360 2365 2370
Gly Gly Cys Ala Ala Gly Cys Thr Cys Cys Cys Thr Ala Thr Gly
2375 2380 2385
Ala Cys Cys Thr Thr Cys Cys Cys Gly Gly Thr Cys Ala Ala Cys
2390 2395 2400
Thr Thr Cys Ala Thr Gly Gly Ala Cys Cys Ala Cys Cys Cys Gly
2405 2410 2415
Thr Cys Cys Thr Cys Cys Gly Cys Cys Ala Ala Cys Thr Thr Cys
2420 2425 2430
Cys Cys Thr Thr Ala Cys Ala Ala Cys Thr Ala Cys Ala Ala Cys
2435 2440 2445
Cys Gly Cys Ala Ala Cys Gly Cys Cys Cys Ala Gly Cys Cys Thr
2450 2455 2460
Cys Ala Gly Gly Gly Cys Ala Thr Gly Gly Gly Thr Ala Thr Gly
2465 2470 2475
Gly Gly Ala Thr Thr Cys Gly Gly Cys Gly Gly Cys Cys Cys Thr
2480 2485 2490
Cys Ala Gly Cys Ala Gly Cys Gly Thr Cys Ala Gly Cys Thr Cys
2495 2500 2505
Cys Ala Gly Ala Ala Gly Gly Ala Thr Gly Thr Cys Gly Ala Thr
2510 2515 2520
Thr Ala Thr Ala Cys Cys Ala Ala Cys Thr Ala Thr Gly Ala Gly
2525 2530 2535
Gly Ala Ala Gly Gly Cys Ala Thr Cys Thr Ala Cys Gly Thr Cys
2540 2545 2550
Gly Gly Cys Thr Ala Cys Cys Gly Cys Thr Ala Cys Thr Thr Cys
2555 2560 2565
Ala Cys Cys Ala Cys Thr Gly Cys Cys Gly Gly Cys Ala Ala Gly
2570 2575 2580
Gly Ala Ala Gly Thr Thr Thr Cys Cys Thr Ala Thr Cys Cys Gly
2585 2590 2595
Thr Thr Cys Gly Gly Cys Thr Ala Thr Gly Gly Cys Ala Thr Gly
2600 2605 2610
Ala Gly Cys Thr Ala Cys Ala Cys Cys Thr Cys Cys Thr Thr Cys
2615 2620 2625
Thr Cys Cys Thr Ala Cys Ala Cys Cys Ala Ala Gly Cys Cys Cys
2630 2635 2640
Gly Thr Cys Gly Thr Cys Ala Ala Gly Gly Cys Cys Gly Thr Gly
2645 2650 2655
Thr Cys Gly Gly Gly Cys Gly Gly Cys Thr Thr Cys Gly Thr Ala
2660 2665 2670
Gly Cys Cys Ala Gly Cys Gly Thr Cys Ala Cys Cys Gly Thr Gly
2675 2680 2685
Ala Cys Cys Ala Ala Thr Ala Cys Cys Gly Gly Thr Gly Cys Cys
2690 2695 2700
Gly Thr Cys Gly Cys Cys Gly Gly Cys Ala Ala Gly Gly Ala Ala
2705 2710 2715
Gly Thr Cys Gly Thr Cys Gly Ala Gly Cys Thr Cys Thr Ala Cys
2720 2725 2730
Gly Thr Cys Thr Cys Cys Gly Cys Cys Cys Cys Thr Gly Cys Cys
2735 2740 2745
Gly Gly Cys Gly Gly Thr Cys Thr Cys Gly Ala Gly Ala Ala Gly
2750 2755 2760
Cys Cys Thr Gly Cys Gly Cys Gly Cys Gly Ala Gly Cys Thr Thr
2765 2770 2775
Cys Gly Thr Gly Gly Thr Thr Thr Thr Gly Cys Cys Ala Ala Gly
2780 2785 2790
Ala Cys Cys Cys Gly Cys Gly Ala Gly Cys Thr Cys Ala Ala Gly
2795 2800 2805
Cys Cys Cys Gly Gly Cys Gly Ala Gly Ala Gly Cys Cys Ala Gly
2810 2815 2820
Gly Thr Cys Gly Thr Gly Ala Ala Cys Ala Thr Ala Gly Ala Gly
2825 2830 2835
Gly Thr Cys Ala Cys Cys Ala Ala Cys Thr Ala Cys Gly Ala Gly
2840 2845 2850
Ala Thr Cys Gly Cys Thr Thr Cys Cys Thr Thr Cys Ala Ala Thr
2855 2860 2865
Gly Ala Ala Gly Cys Cys Gly Cys Thr Thr Cys Cys Gly Cys Thr
2870 2875 2880
Thr Gly Gly Gly Ala Gly Gly Cys Thr Cys Cys Gly Gly Cys Ala
2885 2890 2895
Gly Gly Cys Gly Cys Ala Thr Ala Cys Ala Ala Gly Ala Thr Cys
2900 2905 2910
Thr Gly Cys Thr Thr Cys Gly Gly Cys Gly Cys Cys Ala Gly Cys
2915 2920 2925
Gly Thr Cys Gly Ala Thr Gly Ala Cys Ala Thr Cys Cys Gly Cys
2930 2935 2940
Gly Cys Cys Ala Cys Cys Gly Cys Cys Ala Cys Cys Thr Ala Thr
2945 2950 2955
Cys Ala Gly Cys Thr Cys Ala Ala Gly Ala Ala Gly Gly Cys Cys
2960 2965 2970
Gly Cys Cys Ala Gly Cys Thr Gly Gly Ala Ala Gly Ala Cys Cys
2975 2980 2985
Ala Ala Cys Ala Ala Gly Cys Thr Cys Thr Thr Cys Gly Cys Cys
2990 2995 3000
Cys Thr Cys Gly Ala Cys Gly Cys Cys Cys Cys Gly Cys Thr Cys
3005 3010 3015
Ala Ala Cys Gly Ala Gly Cys Thr Thr Thr Cys Cys Cys Thr Cys
3020 3025 3030
Ala Ala Gly Thr Ala Gly Gly Cys Ala Gly Cys Gly Thr Gly Thr
3035 3040 3045
Thr Thr Thr Gly Thr Ala Ala Ala Thr Ala Cys Cys Thr Cys Gly
3050 3055 3060
Thr Thr Ala Thr Gly Ala Gly Gly Thr Gly Ala Thr Thr Ala Ala
3065 3070 3075
Ala Thr Ala Ala Ala Thr Gly Thr Cys Cys Cys Cys Cys Thr Cys
3080 3085 3090
Cys Gly Thr Thr Thr Thr Thr Gly Gly Ala Gly Gly Gly Gly Gly
3095 3100 3105
Ala Cys Gly Thr Thr Thr Gly Thr Thr Thr Ala Thr Gly Thr Thr
3110 3115 3120
Gly Thr Thr Gly Ala Thr Thr Thr Ala Cys Thr Gly Ala Ala Ala
3125 3130 3135
Gly Thr Thr Ala Cys Ala Ala Ala Ala Cys Ala Cys Gly Gly Ala
3140 3145 3150
Gly Thr Thr Thr Gly Thr Ala Thr Cys Gly Thr Cys Cys Thr Ala
3155 3160 3165
Ala Ala Ala Ala Ala Ala Gly Thr Thr Thr Ala Cys Cys Ala Cys
3170 3175 3180
Cys Ala Ala Ala Gly Gly Thr Ala Ala Gly Thr Thr Thr Thr Thr
3185 3190 3195
Ala Thr Gly Gly Ala Ala Gly Cys Thr Ala Ala Ala Thr Gly Cys
3200 3205 3210
Thr Ala Thr Cys Gly Gly Gly Cys Gly Ala Thr Gly Cys Ala Gly
3215 3220 3225
Cys Gly Thr Gly Cys Cys Cys Ala Ala Gly Gly Ala Ala Ala Gly
3230 3235 3240
Ala Thr Gly Cys Thr Gly Cys Gly Thr Gly Ala Gly Thr Ala Thr
3245 3250 3255
Thr Thr Cys Thr Cys Cys Gly Gly Ala Gly Thr Ala Cys Cys Gly
3260 3265 3270
Gly Thr Gly Gly Ala Gly Ala Ala Cys Cys Thr Gly Thr Cys Ala
3275 3280 3285
Ala Ala Gly Cys Gly Ala Thr Ala Cys Gly Gly Ala Thr Ala Cys
3290 3295 3300
Ala Gly Thr Gly Thr Cys Cys Thr Ala Ala Ala Ala Ala Thr Ala
3305 3310 3315
Ala Ala Gly Ala Cys Gly Cys Thr Thr Gly Cys Ala Thr Cys Cys
3320 3325 3330
Gly Ala Thr Thr Ala Cys Ala Ala Ala Cys Ala Ala Gly Gly Gly
3335 3340 3345
Ala Ala Ala Ala Thr Thr Gly Ala Thr Ala Thr Cys Thr Thr Thr
3350 3355 3360
Gly Ala Cys Ala Ala Thr Cys Cys Gly Cys Ala Gly Ala Ala Ala
3365 3370 3375
Cys Gly Thr Cys Gly Gly Ala Thr Ala Ala Cys Thr Ala Thr Gly
3380 3385 3390
Thr Cys Gly Ala Thr Thr Ala Thr Gly Ala Cys Cys Cys Ala Cys
3395 3400 3405
Cys Ala Gly Gly Ala Ala Gly Ala Ala Gly Thr Ala Cys Ala Ala
3410 3415 3420
Thr Thr Ala Cys Thr Gly Cys Ala Gly Gly Ala Cys Ala Ala Gly
3425 3430 3435
Ala Thr Cys Ala Ala Gly Gly Cys Gly Cys Thr Gly Gly Ala Gly
3440 3445 3450
Ala Ala Cys Gly Cys Cys Thr Gly Ala Ala Gly Cys Thr Gly Gly
3455 3460 3465
Cys Gly
3470
<210> 3
<211> 663
<212> PRT
<213> Unglu135B12基因的部分氨基酸序列
<400> 3
Gly Cys Thr Cys Ala Ala Gly Gly Ala Gly Ala Ala Thr Gly Thr Cys
1 5 10 15
Thr Cys Gly Gly Thr Gly Thr Thr Cys Ala Cys Cys Gly Gly Cys Thr
20 25 30
Thr Cys Ala Ala Gly Cys Cys Cys Thr Thr Cys Gly Ala Cys Cys Ala
35 40 45
Gly Ala Ala Gly Gly Ala Gly Ala Thr Gly Gly Ala Cys Thr Thr Cys
50 55 60
Ala Thr Gly Cys Thr Thr Ala Cys Gly Gly Thr Gly Gly Cys Cys Gly
65 70 75 80
Ala Cys Cys Thr Cys Cys Ala Cys Ala Ala Gly Thr Cys Cys Ala Ala
85 90 95
Gly Gly Gly Cys Cys Ala Gly Ala Thr Cys Cys Cys Cys Thr Gly Cys
100 105 110
Ala Cys Gly Gly Cys Cys Thr Gly Cys Ala Ala Gly Thr Ala Cys Thr
115 120 125
Gly Cys Ala Thr Gly Cys Cys Cys Thr Gly Thr Cys Cys Gly Gly Cys
130 135 140
Ala Gly Gly Cys Gly Thr Gly Gly Ala Cys Ala Thr Cys Cys Cys Cys
145 150 155 160
Gly Gly Cys Ala Ala Thr Thr Thr Cys Ala Ala Gly Ala Thr Ala Thr
165 170 175
Ala Cys Ala Ala Cys Ala Gly Cys Gly Cys Cys Ala Gly Cys Gly Ala
180 185 190
Ala Gly Cys Cys Cys Thr Cys Ala Thr Cys Thr Cys Thr Thr Cys Cys
195 200 205
Gly Ala Gly Ala Cys Cys Gly Ala Cys Ala Gly Gly Ala Ala Gly Gly
210 215 220
Ala Thr Gly Thr Cys Gly Thr Thr Ala Gly Cys Ala Ala Gly Cys Gly
225 230 235 240
Cys Ala Ala Cys Gly Cys Cys Thr Thr Cys Cys Thr Cys Ala Ala Gly
245 250 255
Cys Thr Cys Thr Ala Cys Ala Ala Cys Gly Ala Gly Cys Ala Gly Gly
260 265 270
Ala Cys Ala Ala Gly Gly Cys Cys Gly Thr Thr Ala Gly Gly Gly Cys
275 280 285
Ala Gly Ala Thr Gly Cys Cys Thr Gly Cys Gly Thr Gly Gly Cys Gly
290 295 300
Thr Gly Cys Ala Ala Cys Gly Cys Cys Thr Gly Cys Cys Thr Thr Thr
305 310 315 320
Cys Cys Ala Ala Ala Thr Gly Cys Cys Cys Gly Cys Ala Gly Cys Ala
325 330 335
Cys Ala Thr Cys Ala Gly Cys Ala Thr Cys Cys Cys Cys Cys Ala Gly
340 345 350
Cys Ala Cys Ala Thr Gly Cys Ala Gly Cys Gly Cys Ala Thr Cys Ala
355 360 365
Ala Ala Gly Ala Cys Ala Thr Thr Gly Thr Cys Gly Cys Cys Ala Gly
370 375 380
Cys Cys Thr Gly Thr Ala Gly Thr Thr Thr Gly Ala Ala Cys Ala Thr
385 390 395 400
Ala Cys Ala Gly Thr Ala Cys Ala Cys Ala Thr Thr Thr Thr Gly Ala
405 410 415
Ala Cys Thr Thr Cys Cys Gly Gly Cys Thr Cys Thr Thr Thr Cys Cys
420 425 430
Gly Gly Ala Ala Gly Cys Cys Cys Thr Thr Cys Cys Thr Thr Thr Gly
435 440 445
Thr Cys Thr Ala Cys Cys Thr Thr Thr Gly Thr Cys Ala Gly Ala Cys
450 455 460
Ala Cys Gly Ala Ala Ala Cys Cys Ala Ala Ala Cys Cys Ala Ala Thr
465 470 475 480
Thr Ala Cys Cys Ala Thr Thr Ala Thr Ala Thr Gly Ala Ala Ala Ala
485 490 495
Gly Ala Ala Thr Cys Thr Thr Cys Thr Thr Gly Ala Thr Cys Gly Thr
500 505 510
Cys Gly Cys Thr Gly Cys Gly Gly Gly Cys Cys Thr Thr Ala Thr Gly
515 520 525
Gly Cys Gly Cys Thr Thr Thr Cys Cys Gly Cys Cys Gly Cys Cys Gly
530 535 540
Cys Cys Cys Ala Gly Cys Cys Gly Cys Ala Gly Cys Thr Cys Ala Cys
545 550 555 560
Cys Ala Ala Ala Gly Ala Cys Ala Ala Cys Ala Thr Thr Gly Ala Gly
565 570 575
Gly Ala Ala Gly Thr Cys Cys Thr Cys Ala Ala Ala Gly Cys Cys Ala
580 585 590
Thr Gly Ala Cys Cys Cys Thr Thr Cys Ala Gly Gly Ala Gly Ala Ala
595 600 605
Gly Gly Cys Cys Ala Cys Gly Cys Thr Cys Cys Thr Cys Gly Thr Cys
610 615 620
Gly Gly Ala Gly Gly Ala Gly Cys Cys Cys Gly Cys Gly Cys Cys Cys
625 630 635 640
Ala Gly Ala Thr Gly Gly Thr Gly Ala Ala Cys Gly Gly Cys Gly Thr
645 650 655
Cys Ala Cys Cys Thr Cys Cys
660
<210> 4
<211> 861
<212> PRT
<213> Unglu135B12基因的部分氨基酸序列
<400> 4
Gly Thr Cys Cys Gly Gly Gly Cys Ala Gly Thr Thr Ala Cys Cys Ala
1 5 10 15
Cys Cys Gly Cys Cys Ala Thr Gly Gly Gly Cys Cys Ala Gly Gly Ala
20 25 30
Gly Gly Thr Thr Cys Ala Cys Gly Ala Gly Thr Ala Cys Gly Gly Cys
35 40 45
Gly Thr Ala Gly Ala Cys Gly Thr Cys Cys Thr Thr Cys Thr Cys Gly
50 55 60
Cys Cys Cys Cys Gly Gly Gly Thr Ala Thr Gly Ala Ala Cys Ala Thr
65 70 75 80
Cys Cys Ala Cys Cys Gly Cys Ala Ala Thr Cys Cys Thr Cys Thr Ala
85 90 95
Thr Gly Cys Gly Gly Cys Cys Gly Thr Ala Ala Cys Thr Thr Cys Gly
100 105 110
Ala Gly Thr Ala Thr Thr Thr Cys Thr Cys Cys Gly Ala Gly Gly Ala
115 120 125
Thr Cys Cys Thr Cys Thr Cys Cys Thr Cys Thr Cys Cys Gly Gly Ala
130 135 140
Ala Ala Gly Ala Thr Gly Gly Cys Cys Gly Cys Cys Gly Cys Cys Thr
145 150 155 160
Ala Thr Gly Thr Cys Ala Ala Cys Gly Gly Cys Ala Thr Cys Cys Ala
165 170 175
Gly Thr Cys Cys Ala Ala Cys Ala Ala Thr Gly Thr Gly Gly Gly Cys
180 185 190
Gly Thr Gly Thr Cys Cys Gly Thr Cys Ala Ala Gly Cys Ala Cys Thr
195 200 205
Ala Cys Gly Cys Ala Gly Thr Gly Ala Ala Cys Ala Ala Cys Cys Ala
210 215 220
Gly Gly Ala Gly Ala Cys Cys Ala Ala Cys Cys Gly Cys Ala Ala Cys
225 230 235 240
Gly Ala Gly Gly Ala Cys Ala Ala Cys Gly Cys Cys Cys Gly Cys Gly
245 250 255
Thr Cys Ala Gly Cys Gly Ala Gly Cys Gly Cys Gly Cys Thr Cys Thr
260 265 270
Cys Cys Gly Cys Gly Ala Gly Ala Thr Cys Thr Ala Cys Cys Thr Thr
275 280 285
Ala Gly Gly Ala Ala Cys Thr Thr Cys Gly Ala Gly Ala Thr Ala Gly
290 295 300
Cys Cys Ala Thr Thr Ala Ala Gly Gly Ala Ala Gly Cys Cys Ala Ala
305 310 315 320
Gly Cys Cys Cys Thr Gly Gly Ala Cys Cys Gly Thr Cys Ala Thr Gly
325 330 335
Thr Cys Cys Thr Cys Cys Thr Ala Cys Ala Ala Cys Cys Ala Gly Cys
340 345 350
Thr Cys Ala Ala Cys Gly Gly Cys Gly Ala Gly Thr Ala Cys Ala Cys
355 360 365
Cys Cys Ala Gly Cys Ala Gly Ala Ala Gly Ala Ala Gly Gly Ala Cys
370 375 380
Cys Thr Thr Cys Thr Cys Ala Cys Cys Ala Cys Cys Ala Thr Cys Cys
385 390 395 400
Thr Thr Cys Gly Cys Gly Ala Thr Gly Ala Gly Thr Gly Gly Gly Gly
405 410 415
Cys Thr Thr Thr Gly Gly Cys Gly Gly Cys Ala Thr Cys Gly Thr Cys
420 425 430
Ala Thr Gly Ala Cys Cys Gly Ala Cys Thr Gly Gly Gly Gly Thr Ala
435 440 445
Ala Cys Ala Ala Ala Gly Cys Gly Gly Gly Thr Ala Cys Ala Gly Thr
450 455 460
Cys Ala Ala Gly Thr Cys Cys Gly Cys Ala Thr Gly Gly Gly Cys Cys
465 470 475 480
Gly Gly Cys Ala Ala Cys Gly Ala Thr Cys Thr Cys Ala Thr Gly Gly
485 490 495
Ala Gly Cys Cys Cys Gly Gly Cys Ala Ala Cys Cys Ala Gly Ala Ala
500 505 510
Cys Gly Ala Ala Ala Thr Cys Gly Ala Cys Cys Gly Cys Ala Thr Cys
515 520 525
Gly Thr Cys Gly Cys Cys Gly Gly Thr Gly Thr Cys Cys Ala Gly Gly
530 535 540
Ala Cys Gly Gly Cys Ala Gly Cys Cys Thr Cys Thr Cys Cys Ala Thr
545 550 555 560
Cys Gly Ala Gly Gly Ala Thr Gly Thr Cys Gly Ala Cys Ala Gly Gly
565 570 575
Ala Ala Thr Gly Thr Cys Cys Gly Cys Cys Ala Cys Ala Thr Gly Cys
580 585 590
Thr Cys Gly Ala Gly Thr Ala Cys Ala Thr Cys Gly Thr Cys Ala Ala
595 600 605
Gly Ala Cys Thr Cys Cys Thr Thr Cys Gly Thr Thr Cys Ala Ala Cys
610 615 620
Ala Ala Gly Thr Ala Cys Ala Ala Gly Thr Ala Thr Thr Cys Cys Ala
625 630 635 640
Ala Cys Ala Ala Ala Cys Cys Thr Gly Ala Cys Cys Thr Thr Gly Cys
645 650 655
Cys Gly Gly Ala Cys Ala Cys Gly Cys Cys Cys Ala Gly Gly Thr Cys
660 665 670
Gly Cys Cys Cys Gly Cys Ala Ala Gly Gly Cys Thr Gly Cys Cys Gly
675 680 685
Cys Cys Gly Ala Gly Thr Cys Cys Ala Thr Gly Gly Thr Gly Cys Thr
690 695 700
Cys Cys Thr Cys Cys Gly Cys Ala Ala Cys Gly Ala Gly Gly Ala Thr
705 710 715 720
Ala Ala Cys Ala Cys Cys Cys Thr Thr Cys Cys Thr Cys Thr Cys Ala
725 730 735
Ala Gly Gly Gly Thr Gly Gly Cys Cys Ala Gly Ala Ala Gly Gly Thr
740 745 750
Cys Gly Cys Thr Cys Thr Cys Thr Ala Cys Gly Gly Cys Gly Thr Thr
755 760 765
Thr Cys Cys Gly Cys Cys Ala Thr Cys Gly Ala Cys Thr Thr Cys Gly
770 775 780
Thr Thr Gly Cys Cys Gly Gly Cys Gly Gly Cys Ala Cys Cys Gly Gly
785 790 795 800
Thr Thr Cys Cys Gly Gly Thr Gly Ala Cys Gly Thr Thr Ala Ala Cys
805 810 815
Ala Ala Gly Gly Cys Cys Thr Ala Thr Gly Thr Cys Gly Thr Gly Ala
820 825 830
Ala Thr Ala Thr Gly Gly Thr Gly Cys Ala Gly Gly Gly Ala Cys Thr
835 840 845
Thr Gly Ala Gly Ala Ala Thr Gly Cys Cys Gly Gly Ala
850 855 860
<210> 5
<211> 29
<212> DNA
<213> 人工合成序列
<400> 5
cggaattctc ctttgtctac ctttgtcag 29
<210> 6
<211> 30
<212> DNA
<213> 人工合成序列
<400> 6
atgcggccgc cgaggtattt acaaaacacg 30
Claims (5)
1.一种编码β-葡萄糖苷酶的基因(Unglu135B12),其核苷酸序列从序列表中的SEQ ID No:1的5’端第700位核苷酸开始到3039位核苷酸结束;其中,起始密码子ATG为自5’端的第700位至702位核苷酸,终止密码子TAG为自5’端的第3037位至3039位核苷酸;所述基因Unglu135B12的GC含量为61.15%。
2.一种编码β-葡萄糖苷酶基因,其特征在于为下述核苷酸序列之一的基因:
(1)SEQ ID No:1;
(2)与SEQ ID No:1限定的核苷酸序列具有80%以上同源性的核苷酸序列;
(3)在高严谨条件下可与SEQ ID No:1限定的DNA序列杂交的核苷酸序列;
(4)在高严谨条件下可与SEQ ID No:1限定的DNA序列杂交的核苷酸序列。
3.一种β-葡萄糖苷酶的氨基酸序列,其特征在于为下述氨基酸序列之一的氨基酸:
(1)SEQ ID No:3或SEQ ID No:4;
(2)与SEQ ID No: 3或SEQ ID No:4限定的氨基酸序列具有60%以上同源性的氨基酸序列。
4.根据权利要求1的方法,重组表达载体所用宿主细胞可以是重组表达载体中的任意一种。
5.根据权利要求1的方法,Unglu135B12基因可应用于纤维素降解生产方面。
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CN103352031A (zh) * | 2013-04-26 | 2013-10-16 | 中山大学 | 一种糖基转移酶基因及应用 |
CN113667661A (zh) * | 2021-07-26 | 2021-11-19 | 青岛大学 | 一种β-葡萄糖苷酶及其在制备葡萄糖和昆布寡糖中的应用 |
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CN101100659A (zh) * | 2007-07-06 | 2008-01-09 | 广西大学 | 一种β-葡萄糖苷酶及其编码基因与应用 |
CN102041251A (zh) * | 2009-10-26 | 2011-05-04 | 复旦大学 | 葡萄糖苷酶/木糖苷酶双功能纤维素降解酶RuBGX2及其编码基因和应用 |
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CN101100659A (zh) * | 2007-07-06 | 2008-01-09 | 广西大学 | 一种β-葡萄糖苷酶及其编码基因与应用 |
CN102041251A (zh) * | 2009-10-26 | 2011-05-04 | 复旦大学 | 葡萄糖苷酶/木糖苷酶双功能纤维素降解酶RuBGX2及其编码基因和应用 |
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Cited By (3)
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CN103352031A (zh) * | 2013-04-26 | 2013-10-16 | 中山大学 | 一种糖基转移酶基因及应用 |
CN113667661A (zh) * | 2021-07-26 | 2021-11-19 | 青岛大学 | 一种β-葡萄糖苷酶及其在制备葡萄糖和昆布寡糖中的应用 |
CN113667661B (zh) * | 2021-07-26 | 2023-11-07 | 青岛大学 | 一种β-葡萄糖苷酶及其在制备葡萄糖和昆布寡糖中的应用 |
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