CN114560918A - Yh66_14275蛋白或其突变体在制备l-精氨酸中的应用 - Google Patents
Yh66_14275蛋白或其突变体在制备l-精氨酸中的应用 Download PDFInfo
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- CN114560918A CN114560918A CN202210247407.9A CN202210247407A CN114560918A CN 114560918 A CN114560918 A CN 114560918A CN 202210247407 A CN202210247407 A CN 202210247407A CN 114560918 A CN114560918 A CN 114560918A
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Abstract
本发明公开了YH66_14275蛋白或其突变体在制备L‑精氨酸中的应用。本发明公开的YH66_14275突变体是将YH66_14275蛋白质第87位氨基酸残基由脯氨酸突变为亮氨酸得到的蛋白质。本发明首先通过对YH66_14275基因进行单点突变得到YH66_14275C260T,然后通过对构建的YH66_14275或突变基因的过表达重组菌以及YH66_14275敲除重组菌进行发酵培养发现,YH66_14275基因或其突变基因可以调控细菌L‑精氨酸产量。本发明首次发现YH66_14275基因参与精氨酸的生物合成,对于培育符合工业化生产的高产、高质量菌种,以及精氨酸工业化生产具有重大的应用价值。
Description
技术领域
本发明属于生物技术领域,具体涉及YH66_14275蛋白或其突变体在制备L-精氨酸中的应用。
背景技术
精氨酸是一种α氨基酸,分子式为C6H14N4O2,分子量为174,熔点244℃,溶于水,不溶于乙醚,微溶于乙醇。精氨酸是20种普遍的自然氨基酸之一,是人体和动物体内半必需氨基酸,是鸟氨酸循环中的一个组成成分,也是生物体尿素循环的一种重要中间代谢物,天然精氨酸为L-型,从水中结晶的产物含两分子结晶水,在乙醇中结晶的是无水物,由于胍基的存在,精氨酸呈碱性,易与酸反应形成盐。
精氨酸在医药、食品和饲料添加剂等行业具有广泛的用途,精氨酸可作为复方氨基酸输液的主要组分之一,还广泛用作氨中毒性肝昏迷的解毒剂和肝功能促进剂,对病毒性肝炎疗效显著;对肠道溃疡、血栓形成和神经衰弱等症都有治疗效果;有促进伤口的愈合作用,它可促进胶原组织的合成,在伤口分泌液中可观察到精氨酸酶活性的升高,这也表明伤口附近的精氨酸需要量大增,以促进伤口周围的微循环而促使伤口早日痊愈。精氨酸的免疫调节功能,可防止胸腺的退化,补充精氨酸能增加胸腺的重量,促进胸腺中淋巴细胞的生长;精氨酸与谷氨酰胺一样,人体处于巨大压力之下时才需要,像健美运动员就经常处于此状态中,故需补充精氨酸,对成人来说虽然不是必需氨基酸,但在有些情况如机体发育不成熟或在严重应激条件下,如果缺乏精氨酸,机体便不能维持正氮平衡与正常的生理功能。精氨酸还可作为营养增补剂,精氨酸是鸟氨酸循环中的一个组成成分具有极其重要的生理功能,多吃精氨酸,可以增加肝脏中精氨酸的活性,有助于将血液中的氨转变为尿素而排泄出去。所以,精氨酸对高氨血症,肝脏机能障碍等有一定的疗效。精氨酸还是调味剂,是运动营养饮料配方的重要组成部分;也是一种重要的饲料添加剂,在世界养殖业中有广泛地应用。
随着精氨酸的市场需求不断增加,选育高产、稳定的生产菌种,促进精氨酸在微生物体内的积累,进一步提高精氨酸的产量一直是精氨酸发酵工业技术开发和发酵工程化研究的热点,并且也将一直伴随精氨酸发酵工业的发展,对于促进精氨酸产业化的进程具有重要的意义。
发明内容
本发明的目的是如何利用YH66_14275基因构建产精氨酸工程菌,以进一步提高精氨酸产量。
为了实现上述目的,本发明首先提供了一种YH66_14275突变体。
本发明提供的YH66_14275突变体是将YH66_14275蛋白质第87位氨基酸残基由脯氨酸突变为其他氨基酸残基得到的蛋白质;
所述YH66_14275蛋白质为如下A1)-A3)中的任一种:
A1)SEQ ID No.2所示的氨基酸序列组成的蛋白质;
A2)将A1)所示的氨基酸序列经过除第87位氨基酸残基以外的一个或几个氨基酸残基的取代和/或缺失和/或添加得到的与细菌产精氨酸相关的蛋白质;
A3)来源于细菌且与A1)或A2)具有95%以上同一性且与细菌产精氨酸相关的蛋白质。
上述A2)所述的蛋白质中,所述一个或几个氨基酸残基的取代和/或缺失和/或添加为不超过10个氨基酸残基的取代和/或缺失和/或添加。
上述A3)所述的蛋白质中,这里使用的术语“同一性”指与天然氨基酸序列的序列相似性。“同一性”包括与本发明的SEQ ID No.2所示的氨基酸序列具有95%或更高,或96%或更高,或97%或更高,或98%或更高,或99%或更高同一性的氨基酸序列。同一性可以用肉眼或计算机软件进行评价。使用计算机软件,两个或多个序列之间的同一性可以用百分比(%)表示,其可以用来评价相关序列之间的同一性。
上述A1)或A2)或A3)所述的蛋白质可人工合成,也可先合成其编码基因,再进行生物表达得到。
进一步的,所述YH66_14275突变体是将YH66_14275蛋白质第87位氨基酸残基由脯氨酸突变为亮氨酸得到的蛋白质(对应本发明实施例中的YH66_14275C260T蛋白质)。
更进一步的,所述YH66_14275突变体(YH66_14275C260T蛋白质)是SEQ ID No.4所示的氨基酸序列组成的蛋白质。
为了实现上述目的,本发明又提供了与YH66_14275突变体相关的生物材料。
本发明提供的与YH66_14275突变体相关的生物材料为如下B1)至B4)中的任一种:
B1)编码上述YH66_14275突变体的核酸分子;
B2)含有B1)所述核酸分子的表达盒;
B3)含有B1)所述核酸分子的重组载体、或含有B2)所述表达盒的重组载体;
B4)含有B1)所述核酸分子的重组微生物、或含有B2)所述表达盒的重组微生物、或含有B3)所述重组载体的重组微生物。
为了实现上述目的,本发明还提供了上述YH66_14275蛋白质或与上述YH66_14275蛋白质相关的生物材料或上述YH66_14275突变体或与上述YH66_14275突变体相关的生物材料的新用途。
本发明提供了上述YH66_14275蛋白质或与上述YH66_14275蛋白质相关的生物材料或上述YH66_14275突变体或与上述YH66_14275突变体相关的生物材料在如下X1)至X3)中任一种中的应用:
X1)调控细菌精氨酸产量;
X2)构建产精氨酸工程菌;
X3)制备精氨酸;
与YH66_14275蛋白质相关的生物材料为如下D1)至D4)中的任一种:
D1)编码所述YH66_14275蛋白质的核酸分子;
D2)含有D1)所述核酸分子的表达盒;
D3)含有D1)所述核酸分子的重组载体、或含有D2)所述表达盒的重组载体;
D4)含有D1)所述核酸分子的重组微生物、或含有D2)所述表达盒的重组微生物、或含有D3)所述重组载体的重组微生物。
上述生物材料或应用中,B1)所述编码YH66_14275突变体的核酸分子为如下C1)或C2)中的任一种:
C1)核苷酸序列为SEQ ID No.3的DNA分子;
C2)将SEQ ID No.3所示的核苷酸序列经过修饰和/或一个或几个核苷酸的取代和/或缺失和/或添加得到的与C1)所示的DNA分子具有90%以上的同一性,且具有相同功能的DNA分子。
D1)所述编码YH66_14275蛋白质的核酸分子为如下E1)或E2)中的任一种:
E1)核苷酸序列为SEQ ID No.1的DNA分子;
E2)将SEQ ID No.1所示的核苷酸序列经过修饰和/或一个或几个核苷酸的取代和/或缺失和/或添加得到的与E1)所示的DNA分子具有90%以上的同一性,且具有相同功能的DNA分子。
其中,SEQ ID No.1所示的DNA分子为谷氨酸棒杆菌(Corynebacteriumglutamicum)CGMCC No.20516中的YH66_14275基因,其编码的YH66_14275蛋白质的氨基酸序列如SEQ ID No.2所示。在本发明中通过引入点突变,得到SEQ ID No.3所示的YH66_14275C260T基因,其编码的YH66_14275C260T蛋白质的氨基酸序列如SEQ ID No.4所示。
本领域普通技术人员可以很容易地采用已知的方法,例如定向进化和点突变的方法,对本发明的编码YH66_14275蛋白质或YH66_14275突变体的核苷酸序列进行突变。那些经过人工修饰的,具有编码YH66_14275蛋白质或YH66_14275突变体的核苷酸序列90%或者更高同一性的核苷酸,只要编码YH66_14275蛋白质或YH66_14275突变体且具有相同功能,均是衍生于本发明的核苷酸序列并且等同于本发明的序列。
这里使用的术语“同一性”指与天然核酸序列的序列相似性。“同一性”包括与本发明的编码SEQ ID No.2或SEQ ID No.4所示的氨基酸序列组成的蛋白质的核苷酸序列具有90%或更高,或91%或更高,或92%或更高,或93%或更高,或94%或更高,或95%或更高,或96%或更高,或97%或更高,或98%或更高,或99%或更高同一性的核苷酸序列。同一性可以用肉眼或计算机软件进行评价。使用计算机软件,两个或多个序列之间的同一性可以用百分比(%)表示,其可以用来评价相关序列之间的同一性。
所述严格条件是在2×SSC,0.1%SDS的溶液中,在68℃下杂交并洗膜2次,每次5min;或,0.5×SSC,0.1%SDS的溶液中,在68℃下杂交并洗膜2次,每次15min;或,0.1×SSPE(或0.1×SSC)、0.1%SDS的溶液中,65℃条件下杂交并洗膜。
上述生物材料或应用中,B2)所述含有编码YH66_14275突变体的核酸分子的表达盒是指能够在宿主细胞中表达YH66_14275突变体的DNA,该DNA不但可包括启动YH66_14275突变体基因转录的启动子,还可包括终止YH66_14275突变体基因转录的终止子。进一步,所述表达盒还可包括增强子序列。D2)所述含有编码YH66_14275蛋白质的核酸分子的表达盒是指能够在宿主细胞中表达YH66_14275蛋白质的DNA,该DNA不但可包括启动YH66_14275基因转录的启动子,还可包括终止YH66_14275基因转录的终止子。进一步,所述表达盒还可包括增强子序列。
上述生物材料或应用中,B3)或D3)所述载体可为质粒、黏粒、噬菌体或病毒载体。所述质粒具体可为pK18mobsacB质粒或pXMJ19质粒。
在本发明的一个具体实施例中,所述重组载体为重组载体pK18-YH66_14275C260T。
在本发明的另一个具体实施例中,所述重组载体为重组载体pK18-YH66_14275OE或重组载体pK18-YH66_14275C260TOE。
在本发明的又一个具体实施例中,所述重组载体为重组载体pXMJ19-YH66_14275或重组载体pXMJ19-YH66_14275C260T。
上述生物材料中,B4)或D4)所述微生物可为酵母、细菌、藻或真菌。
进一步的,细菌可为任一具有产精氨酸能力的细菌,如来自短杆菌属(Brevibacterium)、棒杆菌属(Corynebacterium)、埃希氏菌属(Escherichia)、气杆菌属(Aerobacter)、微球菌属(Micrococcus)、黄杆菌属(Flavobacterium)或芽胞杆菌属(Bacillus)的细菌等。
更进一步的,所述细菌包括但不限于谷氨酸棒杆菌(Corynebacteriumglutamicum)、黄色短杆菌(Brevibacterium flavum)、乳酸发酵短杆菌(Brevibacteriumlactofermentum)、产谷氨酸微球菌(Micrococcus glutamicus)、产氨短杆菌(Brevibacterum ammoniagenes)、大肠杆菌(Escherichia coli)、产气气杆菌(Aerobacteraerogenes)。
在本发明的一个具体实施例中,所述微生物为谷氨酸棒杆菌(Corynebacteriumglutamicum)CGMCC No.20516,该菌株名称为YPARG01,已于2020年8月10日保藏于中国微生物菌种保藏管理委员会普通微生物中心(简称CGMCC,地址为:北京市朝阳区北辰西路1号院3号,中国科学院微生物研究所),保藏登记号为CGMCC No.20516。
上述应用中,调控为正调控。具体体现为当细菌中YH66_14275蛋白质或YH66_14275突变体含量或活性提高时,所述细菌精氨酸产量提高;当细菌中YH66_14275蛋白质含量或活性降低时,所述细菌精氨酸产量降低。
为了实现上述目的,本发明还提供了提高YH66_14275蛋白质或YH66_14275突变体含量和/或活性的物质或提高YH66_14275基因或YH66_14275突变体基因表达量的物质的新用途。
本发明提供了提高YH66_14275蛋白质或YH66_14275突变体含量和/或活性的物质或提高YH66_14275基因或YH66_14275突变体基因表达量的物质在如下Y1)至Y3)中任一种中的应用:
Y1)提高细菌精氨酸产量;
Y2)构建产精氨酸工程菌;
Y3)制备精氨酸。
进一步的,所述提高YH66_14275基因表达量的物质可为YH66_14275基因或含有所述YH66_14275基因的重组载体。
所述提高YH66_14275突变体基因表达量的物质可为YH66_14275突变体基因或含有所述YH66_14275突变体基因的重组载体。
更进一步的,含有所述YH66_14275基因的重组载体具体可为重组载体pK18-YH66_14275OE或重组载体pXMJ19-YH66_14275。
含有所述YH66_14275突变体基因的重组载体具体可为重组载体pK18-YH66_14275C260TOE或重组载体pXMJ19-YH66_14275C260T。
为了实现上述目的,本发明还提供了一种提高细菌精氨酸产量的方法。
本发明提供的提高细菌精氨酸产量的方法为如下M1)或M2):
所述M1)包括如下步骤:将细菌基因组中的YH66_14275基因替换为YH66_14275突变体基因,实现细菌精氨酸产量的提高;
所述M2)包括如下步骤:提高细菌中YH66_14275蛋白质或YH66_14275突变体含量和/或活性,或提高细菌中YH66_14275基因或YH66_14275突变体基因表达量,实现细菌精氨酸产量的提高。
为了实现上述目的,本发明还提供了一种产精氨酸工程菌的构建方法。
本发明提供的产精氨酸工程菌的构建方法为如下N1)或N2):
所述N1)包括如下步骤:将细菌基因组中的YH66_14275基因替换为YH66_14275突变体基因,得到所述产精氨酸工程菌;
所述N2)包括如下步骤:提高细菌中YH66_14275蛋白质或YH66_14275突变体含量和/或活性,或提高细菌中YH66_14275基因或YH66_14275突变体基因表达量,得到所述产精氨酸工程菌;
上述任一所述应用或方法中,所述YH66_14275突变体具体为YH66_14275C260T蛋白质,具体为SEQ ID No.4所示的氨基酸序列组成的蛋白质。
所述YH66_14275突变体基因具体为YH66_14275C260T基因,具体为SEQ ID No.3所示的DNA分子。
按照上述产精氨酸工程菌的构建方法构建得到的产精氨酸工程菌在制备精氨酸中的应用也属于本发明的保护范围。
为了实现上述目的,本发明最后提供了一种制备精氨酸的方法。
本发明提供的制备精氨酸的方法包括如下步骤:发酵培养按照上述产精氨酸工程菌的构建方法构建得到的产精氨酸工程菌,得到所述精氨酸。
所述发酵培养方法可按照现有技术中的常规试验方法进行。也可采用优化和改进后的常规试验方法进行。所述发酵培养采用的培养基如实施例中的表3所示。所述发酵培养条件如实施例中的表4所示。
上述任一所述应用或方法中,所述精氨酸具体为L-精氨酸。
本发明首先通过对YH66_14275基因进行单点突变得到YH66_14275C260T基因,然后通过对构建的YH66_14275或突变基因的过表达重组菌以及YH66_14275敲除重组菌进行发酵培养发现,YH66_14275基因或其突变基因可以调控细菌L-精氨酸产量。本发明首次发现YH66_14275基因参与精氨酸的生物合成,对于培育符合工业化生产的高产、高质量菌种,以及精氨酸工业化生产具有重大的应用价值。
具体实施方式
下面结合具体实施方式对本发明进行进一步的详细描述,给出的实施例仅为了阐明本发明,而不是为了限制本发明的范围。以下提供的实施例可作为本技术领域普通技术人员进行进一步改进的指南,并不以任何方式构成对本发明的限制。
下述实施例中的实验方法,如无特殊说明,均为常规方法,按照本领域内的文献所描述的技术或条件或者按照产品说明书进行。下述实施例中所用的材料、试剂等,如无特殊说明,均可从商业途径得到。
实施例1、构建包含点突变的YH66_14275基因编码区的重组载体
依据NCBI公布的黄色短杆菌(Brevibacterium flavum)ATCC15168基因组序列,设计并合成两对扩增YH66_14275基因编码区的引物,以等位基因置换的方式在谷氨酸棒杆菌(Corynebacterium glutamicum)CGMCC 20516(经测序确认该菌株染色体上保留有野生型的YH66_14275基因)的YH66_14275基因编码区(SEQ ID No.1)中引入点突变,所述点突变为将YH66_14275基因的核苷酸序列(SEQ ID No.1)中的第260位胞嘧啶(C)突变为胸腺嘧啶(T),得到SEQ ID No.3所示的DNA分子(突变的YH66_14275基因,名称为YH66_14275C260T)。
其中,SEQ ID No.1所示的DNA分子编码氨基酸序列为SEQ ID No.2的蛋白质(所述蛋白质名称为蛋白质YH66_14275)。
SEQ ID No.3所示的DNA分子编码氨基酸序列为SEQ ID No.4的突变蛋白质(所述突变蛋白质名称为YH66_14275C260T)。所述突变蛋白质YH66_14275C260T氨基酸序列(SEQ IDNo.4)中的第87位亮氨酸(L)由脯氨酸(P)突变而来。
采用NEBuilder重组技术进行载体构建,引物设计如下(上海invitrogen公司合成),加红色粗字体的碱基为突变位置:
P1:5'-CAGTGCCAAGCTTGCATGCCTGCAGGTCGACTCTAGCACGCAGGAAGGTAAGTGCC-3';
P2:5'-TCTTGGGCGTGGGTACTCTTCAGCAGAAGGGTAC-3';
P3:5'-GTACCCTTCTGCTGAAGAGTACCCACGCCCAAGA-3';
P4:5'-CAGCTATGACCATGATTACGAATTCGAGCTCGGTACCCGTCTTGGCTTGTTGACGCAC-3'。
构建方法:以黄色短杆菌ATCC15168为模板,分别采用引物P1/P2和P3/P4进行PCR扩增,获得两条分别带有突变碱基,大小分别为666bp和652bp的YH66_14275基因编码区的DNA片段(YH66_14275Up和YH66_14275Down)。
PCR扩增体系为:10×Ex Taq Buffer 5μL,dNTP Mixture(各2.5mM)4μL,Mg2+(25mM)4μL,引物(10pM)各2μL,Ex Taq(5U/μL)0.25μL,总体积50μL。
PCR扩增反应程序为:94℃预变性5min,(94℃变性30s;52℃退火30s;72℃延伸40s;30个循环),72℃过度延伸10min。
将上述两条DNA片段(YH66_14275Up和YH66_14275Down)经琼脂糖凝胶电泳分离纯化后,与经过酶切(Xbal I/BamH I)后纯化的pK18mobsacB质粒(购自Addgene公司,用XbalI/BamH I酶切)用NEBuilder酶(购自NEB公司)50℃连接30min,连接产物转化后长出的单克隆经PCR鉴定获得阳性重组载体pK18-YH66_14275C260T,该重组载体上含有卡那霉素抗性标记。将酶切正确的重组载体pK18-YH66_14275C260T送测序公司测序鉴定,并将含有正确点突变(C-T)的重组载体pK18-YH66_14275C260T保存备用。
重组载体pK18-YH66_14275C260T中YH66_14275C260T Up-Down DNA片段(序列如SEQID No.5所示)大小为1284bp,由于含有突变位点,导致菌株谷氨酸棒杆菌CGMCC 20516中YH66_14275基因编码区的第260位胞嘧啶(C)变为胸腺嘧啶(T),最终导致编码蛋白的第87位脯氨酸(P)变为亮氨酸(L)。
重组载体pK18-YH66_14275C260T是将pK18mobsacB载体的Xbal I和/BamH I识别位点间的片段(小片段)替换为序列表中SEQ ID No.5的第37-1246位所示的DNA片段,且保持pK18mobsacB载体的其他序列不变得到的重组载体。
所述重组载体pK18-YH66_14275C260T含有SEQ ID No.3所示的突变基因YH66_14275C260T的第1-871位所示的DNA分子。
实施例2、构建包含基因YH66_14275C260T的工程菌株
将实施例1中的等位替换质粒(pK18-YH66_14275C260T)通过电击转化入谷氨酸棒杆菌(Corynebacterium glutamicum)CGMCC 20516中后,在培养基中进行培养,培养基成分和培养条件参见表1,对培养产生的单菌落分别通过实施例1中的引物P1和通用引物M13R(5’-CAGGAAACAGCTATGACC-3’)进行鉴定,能扩增出大小为1291bp条带(序列如SEQ ID No.6所示)的菌株为阳性菌株。将阳性菌株在含15%蔗糖的培养基上培养,对培养产生的单菌落分别在含有卡那霉素和不含卡那霉素的培养基上培养,选择在不含卡那霉素的培养基上生长,而在含卡那霉素的培养基上不生长的菌株进一步采用如下引物(上海invitrogen公司合成)进行PCR鉴定:
P5:5'-AGCTCCTGCAACTGCTCAGC-3';
P6:5'-GAGCCGGGTTTGCCTGAGGT-3'。
将得到的PCR扩增产物(260bp)通过95℃高温变性10min、冰浴5min后进行SSCP(Single-Strand Conformation Polymorphis)电泳(以质粒pK18-YH66_14275C260T扩增片段为阳性对照,黄色短杆菌ATCC15168扩增片段为阴性对照,水作为空白对照),SSCP电泳的PAGE的制备及电泳条件参见表2,由于片段结构不同,电泳位置不同,因此片段电泳位置与阴性对照片段位置不一致且与阳性对照片段位置一致的菌株为等位替换成功的菌株。再次通过引物P5/P6 PCR扩增阳性菌株YH66_14275基因片段,并连接到PMD19-T载体进行测序,通过序列比对,碱基序列发生突变(C-T)的菌株为等位替换成功的阳性菌株,并被命名为YPR-043。
重组菌YPR-043含有SEQ ID No.3所示的突变的基因YH66_14275C260T。
表1、培养基的组成和培养条件
成分 | 配方 |
蔗糖 | 10g/L |
多聚蛋白胨 | 10g/L |
牛肉膏 | 10g/L |
酵母粉 | 5g/L |
尿素 | 2g/L |
氯化钠 | 2.5g/L |
琼脂粉 | 20g/L |
水 | |
pH | 7.0 |
培养条件 | 32℃ |
表2、SSCP电泳的PAGE的制备及电泳条件
实施例3、构建基因组上过表达YH66_14275基因或YH66_14275C260T基因的工程菌株
采用NEBuilder重组技术进行载体构建,依据NCBI公布的黄色短杆菌ATCC15168基因组序列,设计并合成三对扩增上下游同源臂片段及YH66_14275或YH66_14275C260T基因编码区及启动子区的引物,以同源重组的方式在谷氨酸棒杆菌CGMCC 20516中引入YH66_14275或YH66_14275C260T基因。
引物设计如下(上海invitrogen公司合成):
P7:5'-CAGTGCCAAGCTTGCATGCCTGCAGGTCGACTCTAGCATGACGGCTGACTGGACTC3';
P8:5'-CGCTCGGCCG CAACCTTTAGAATCGGACTC CTTAAATGGG-3',
P9:5'-CCCATTTAAG GAGTCCGATTCTAAAGGTTG CGGCCGAGCG-3',
P10:5'-CTATGTGAGT AGTCGATTTAGCAATCATGT GTTCCGGTCG-3',
P11:5'-CGACCGGAAC ACATGATTGCTAAATCGACT ACTCACATAG-3',
P12:5'-CAGCTATGACCATGATTACGAATTCGAGCTCGGTACCCTGCATAAGAAACAACCACTT3'。
构建方法:分别以黄色短杆菌ATCC15168或YPR-043为模板,分别采用引物P7/P8、P9/P10和P11/P12进行PCR扩增,获得上游同源臂片段806bp(对应于谷氨酸棒杆菌CGMCC20516YH66_03350基因及其启动子区或者是与上一个基因的间隔区,序列如SEQ IDNo.7所示),YH66_14275基因及其启动子片段1445bp(序列如SEQ ID No.8所示)或YH66_14275C260T基因及其启动子片段1445bp(序列如SEQ ID No.9所示)及下游同源臂片段783bp(对应于谷氨酸棒杆菌CGMCC 20516YH66_03355基因及其与YH66_03350基因的部分间隔区,序列如SEQ ID No.10所示)。
PCR反应结束后,对每个模板扩增得到的3个片段采用柱式DNA凝胶回收试剂盒分别进行电泳回收。回收后的3个片段与经过Xbal I/BamH I酶切后纯化的pK18mobsacB质粒(购自Addgene公司)用NEBuilder酶(购自NEB公司)50℃连接30min,连接产物转化后长出的单克隆用M13引物(M13F:5'-TGTAAAACGACGGCCAGT-3',M13R:5’-CAGGAAACAGCTATGACC-3’)经PCR鉴定获得阳性整合质粒(重组载体),分别为pK18-YH66_14275OE、pK18-YH66_14275C260T OE,该阳性整合质粒上含有卡那霉素抗性标记,可以通过卡那霉素筛选获得质粒整合到基因组上的重组子。
PCR反应体系为:10×Ex Taq Buffer 5μL,dNTP Mixture(各2.5mM)4μL,Mg2+(25mM)4μL,引物(10pM)各2μL,Ex Taq(5U/μL)0.25μL,总体积50μL。
PCR反应程序为:94℃预变性5min,94℃变性30s;52℃退火30s;72℃延伸60s(30个循环),72℃过度延伸10min。
将测序正确的整合质粒(pK18-YH66_14275OE、pK18-YH66_14275C260TOE)分别电转化入谷氨酸棒杆菌CGMCC 20516,在培养基中进行培养,培养基成分和培养条件参见表1,对培养产生的单菌落通过P13/P14引物进行PCR鉴定,PCR扩增出含有大小为1669bp条带(序列如SEQ ID No.11所示)的菌株为阳性菌株,扩增不到条带的菌株为原菌。将阳性菌株在含15%蔗糖的培养基上培养,对培养产生的单菌落进一步采用P15/P16引物进行PCR鉴定,扩增出大小为1516bp条带(不含点突变的序列如SEQ ID No.12所示,含点突变序列第382位为A,其余如SEQ ID No.12)的菌株为YH66_14275或YH66_14275C260T基因整合到谷氨酸棒杆菌CGMCC 20516基因组上同源臂YH66_03350和下同源臂YH66_03355的间隔区上的阳性菌株,分别命名为YPR-044(不含突变点)和YPR-045(含突变点)。
重组菌YPR-044含有双拷贝的SEQ ID No.1所示的YH66_14275基因;具体地,重组菌YPR-044是将谷氨酸棒杆菌CGMCC 20516的基因组中上同源臂YH66_03350和下同源臂YH66_03355的间隔区替换为YH66_14275基因,且保持谷氨酸棒杆菌CGMCC 20516的基因组中的其它核苷酸不变得到的重组菌。含有双拷贝YH66_14275基因的重组菌可以显著和稳定地提高YH66_14275基因的表达量。
重组菌YPR-045含有SEQ ID No.3所示的突变的YH66_14275C260T基因;具体地,重组菌YPR-045是将谷氨酸棒杆菌CGMCC 20516的基因组中上同源臂YH66_03350和下同源臂YH66_03355的间隔区替换为YH66_14275C260T基因,且保持谷氨酸棒杆菌CGMCC 20516的基因组中的其它核苷酸不变得到的重组菌。
PCR鉴定引物如下所示:
P13:5'-GTCCGCTCTGTTGGTGTTCA-3'(对应上同源臂YH66_03350的外侧);
P14:5'-AAGACACCATCACTCCGGAC-3'(对应YH66_14275基因内部);
P15:5'-GCATTCGCGGAAACTTTCAC-3'(对应YH66_14275基因内部);
P16:5'-TGGAGGAATATTCGGCCCAG-3'(对应下同源臂YH66_03355的外侧)。
实施例4、构建质粒上过表达YH66_14275基因或YH66_14275C260T基因的工程菌株
采用NEBuilder重组技术进行载体构建,依据NCBI公布的黄色短杆菌ATCC15168基因组序列,设计并合成一对扩增YH66_14275或YH66_14275C260T基因编码区及启动子区的引物,引物设计如下(上海invitrogen公司合成):
P17:5'-GCTTGCATGCCTGCAGGTCGACTCTAGAGGATCCCCCTAAAGGTTGCGGCCGAGCG-3'(带下划线的核苷酸序列为pXMJ19上的序列);
P18:5'-ATCAGGCTGAAAATCTTCTCTCATCCGCCAAAACGCAATCATGTGTTCCGGTCG-3'(带下划线的核苷酸序列为pXMJ19上的序列)。
构建方法:分别以黄色短杆菌ATCC15168或YPR-043为模板,采用引物P17/P18进行PCR扩增,获得YH66_14275基因及其启动子片段(序列如SEQ ID No.13所示)和YH66_14275C260T基因及其启动子片段1475bp(序列如SEQ ID No.14所示),对扩增产物进行电泳并采用柱式DNA凝胶回收试剂盒进行纯化回收,回收的DNA片段与经EcoR I/Kpn I酶切回收的穿梭质粒pXMJ19用NEBuilder酶(购自NEB公司)50℃连接30min,连接产物转化后长出的单克隆用M13R(-48)(5'-AGCGGATAACAATTTCACACAGGA-3')和P18引物经PCR鉴定获得阳性过表达质粒pXMJ19-YH66_14275(含有YH66_14275基因)和pXMJ19-YH66_14275C260T(含有YH66_14275C260T基因),将该质粒送测序。因质粒上含有氯霉素抗性标记,可以通过氯霉素来筛选质粒是否转化到菌株中。
PCR反应体系如下:10×Ex Taq Buffer 5μL,dNTP Mixture(各2.5mM)4μL,Mg2+(25mM)4μL,引物(10pM)各2μL,Ex Taq(5U/μL)0.25μL,总体积50μL。
PCR反应程序如下:94℃预变性5min,94℃变性30s;52℃退火30s;72℃延伸60s(30个循环),72℃过度延伸10min。
将测序正确的pXMJ19-YH66_14275和pXMJ19-YH66_14275C260T质粒分别电转化入谷氨酸棒杆菌CGMCC 20516中,在培养基中进行培养,培养基成分和培养条件参见表1,对培养产生的单菌落通过引物M13R(-48)/P18进行PCR鉴定,PCR扩增出含有大小为1514bp(不含点突变的序列如SEQ ID No.15所示,含点突变序列第1136位为A,其余如SEQ ID No.15所示)片段的菌株为阳性菌株,其被命名为YPR-046(不含突变点)和YPR-047(含突变点)。
重组菌YPR-046含有SEQ ID No.1所示的YH66_14275基因;重组菌YPR-047含有SEQID No.3所示的突变的YH66_14275C260T基因。
实施例5、构建基因组上缺失YH66_14275基因的工程菌株
根据NCBI公布的黄色短杆菌ATCC15168的基因组序列,合成两对扩增YH66_14275基因编码区两端片段的引物,作为上下游同源臂片段。引物设计如下(上海invitrogen公司合成):
P19:5'-CAGTGCCAAGCTTGCATGCCTGCAGGTCGACTCTAGCAGCGGGCACGATGCGATGT3';
P20:5'-ATTGAAAGGA ATCACCCTACTGGCGGTGGACCAGGCGGGG-3';
P21:5'-CCCCGCCTGG TCCACCGCCAGTAGGGTGATTCCTTTCAAT-3';
P22:5'-CAGCTATGACCATGATTACGAATTCGAGCTCGGTACCCTAAATCAATTGACGCAGGCG3'。
构建方法:以黄色短杆菌ATCC15168为模板,分别采用引物P19/P20和P21/P22进行PCR扩增,获得大小为707bp的YH66_14275的上游同源臂片段及大小为687bp的YH66_14275的下游同源臂片段。对扩增产物进行电泳并采用柱式DNA凝胶回收试剂盒进行纯化,回收的DNA片段与经过Xbal I/BamH I酶切后纯化的pK18mobsacB质粒(购自Addgene公司)用NEBuilder酶(购自NEB公司)50℃连接30min,连接产物转化后长出的单克隆用M13引物经PCR鉴定获得阳性敲除载体pK18-ΔYH66_14275,该质粒含有整个敲除YH66_14275同源臂片段1354bp(序列如SEQ ID No.16所示)和卡那霉素抗性作为筛选标记,将该质粒送测序。
PCR扩增反应体系如下:10×Ex Taq Buffer 5μL,dNTP Mixture(各2.5mM)4μL,Mg2+(25mM)4μL,引物(10pM)各2μL,Ex Taq(5U/μL)0.25μL,总体积50μL。
PCR扩增反应程序如下:94℃预变性5min,94℃变性30s;52℃退火30s;72℃延伸90s(30个循环),72℃过度延伸10min。
将测序正确的敲除质粒pK18-ΔYH66_14275电转化入谷氨酸棒杆菌CGMCC 20516,在培养基中进行培养,培养基成分和培养条件参见表1,对培养产生的单菌落通过如下引物(上海invitrogen公司合成)进行PCR鉴定:
P23:5'-CAGCGGGCACGATGCGATGT-3'(对应于谷氨酸棒杆菌CGMCC 20516YH66_14270基因内部);
P24:5'-TAAATCAATTGACGCAGGCG-3'(对应于谷氨酸棒杆菌CGMCC 20516YH66_14275与YH66_14280基因间隔区)。
上述PCR同时扩增出大小为1280bp及2600bp条带的菌株为阳性菌株,只扩增出大小为2600bp条带的菌株为原菌。阳性菌株在15%蔗糖培养基上筛选后分别在含有卡那霉素和不含卡那霉素的培养基上培养,选择在不含卡那霉素的培养基上生长,而在含卡那霉素的培养基上不生长的菌株进一步采用P23/P24引物进行PCR鉴定,扩增出大小为1280bp条带的菌株为YH66_14275基因编码区被敲除的阳性菌株。再次通过P23/P24引物PCR扩增阳性菌株YH66_14275片段,并连接到pMD19-T载体进行测序,将测序正确的菌株命名为YPR-048。
重组菌YPR-048为将谷氨酸棒杆菌CGMCC 20516基因组上的YH66_14275基因敲除后得到的重组菌。
实施例6、L-精氨酸发酵实验
将上述实施例构建的菌株和原始菌株谷氨酸棒杆菌CGMCC 20516在BLBIO-5GC-4-H型号的发酵罐(购自上海百仑生物科技有限公司)中以表3所示的培养基和表4所示的控制工艺进行发酵实验。每个菌株重复三次,结果如表5所示。
结果如表5所示,在谷氨酸棒杆菌中对YH66_14275基因编码区进行点突变YH66_14275C260T及过表达,有助于L-精氨酸产量及转化率的提高,而对基因进行敲除或弱化,不利于L-精氨酸的积累。
表3、发酵培养基配方(其余为水)
表4、发酵控制工艺
表5、L-精氨酸发酵实验结果
菌株 | OD<sub>562nm</sub> | L-精氨酸产量(g/L) |
谷氨酸棒杆菌CGMCC 20516 | 75.0 | 87.9 |
YPR-043 | 77.2 | 89.1 |
YPR-044 | 76.8 | 88.6 |
YPR-045 | 77.5 | 89.5 |
YPR-046 | 77.7 | 89.3 |
YPR-047 | 78.1 | 90.6 |
YPR-048 | 74.8 | 86.1 |
以上对本发明进行了详述。对于本领域技术人员来说,在不脱离本发明的宗旨和范围,以及无需进行不必要的实验情况下,可在等同参数、浓度和条件下,在较宽范围内实施本发明。虽然本发明给出了特殊的实施例,应该理解为,可以对本发明作进一步的改进。总之,按本发明的原理,本申请欲包括任何变更、用途或对本发明的改进,包括脱离了本申请中已公开范围,而用本领域已知的常规技术进行的改变。按以下附带的权利要求的范围,可以进行一些基本特征的应用。
序列表
<110> 宁夏伊品生物科技股份有限公司
<120> YH66_14275蛋白或其突变体在制备L-精氨酸中的应用
<160> 16
<170> PatentIn version 3.5
<210> 1
<211> 1320
<212> DNA
<213> Artificial Sequence
<400> 1
atgcggatga cagtgattgg tacgggttac cttggcgcta cgcacgcggc ctgcatggct 60
gagcttggcc atgaggttct tggtgttgat gtcgatgagg caaagattgc gtcgttgaag 120
gacagcaagg tcccattttt tgagccgggt ttgcctgagg ttttggagcg caatctggat 180
aatggtcgtc tgaacttcac tactgattat gcggaggctg cggctttcgc gcaggtgcat 240
ttcttgggcg tgggtactcc tcagcagaag ggtacttatg cggcggatct gacgtatgtt 300
cgtcaggttg ttgaggattt ggtgccgatg cttgagggtg agcacattat tttcggcaag 360
tctacggttc cggttggtac tgctgagcag ttgcaggagc ttgctgattc tctggtcaag 420
cctggttctc atgtggagat cgcgtggaat ccggagttct tgcgtgaggg ctacgcggtc 480
aaagacacca tcactccgga ccgcatcgtg gtgggtgtgc gtgagggggc gacagcagag 540
gcgatcgctc gggaggttta ctccaccgcg attgctgccg ataccccatt tttggtgact 600
gatcttgcta ccgctgagct ggtgaaagtt tccgcgaatg ctttcttggc caccaagatt 660
tccttcatca atgcggtcgc tgagatttgt gagcagaccg gcgccgatgt ggttgcgctt 720
gcggatgcca tcggtcacga cgatcgtatc ggccgaaagt tcttaggcgc gggcctggga 780
ttcggtggcg gttgcttgcc taaggatatc cgcgcattca tggcgcgcgc gggcgaattg 840
ggcgctgacc aggcacttac cttcctgcgt gaggtcgatt ccatcaacat gcgccgccgt 900
gaccgcgtgg tgcagctggc caaagagatg tgtggcggtt cgctgctggg caagcgcatc 960
acggtactcg gcgccgcatt caaacccaac tcggacgatg tccgcgattc tccggcgttg 1020
tcggtcgctg gctcgctgtc gctccagggt gctgcggtct cggtttacga cccggaagct 1080
atggacaacg ctcgacgcgt cttcccgacg ctcagctatg cgtccagcac taaagaggcg 1140
cttatcgacg cccacctcgt cgttcttgcc actgaatggc aagaattccg cgaccttgac 1200
ccccaagtgg cgggaggggt cgtcgagaag cgcgctatta ttgatggccg aaacgtcctc 1260
gatgttgcca aatggaaggc cgccggctgg gaaatggaag cgctcggccg caacctttag 1320
<210> 2
<211> 439
<212> PRT
<213> Artificial Sequence
<400> 2
Met Arg Met Thr Val Ile Gly Thr Gly Tyr Leu Gly Ala Thr His Ala
1 5 10 15
Ala Cys Met Ala Glu Leu Gly His Glu Val Leu Gly Val Asp Val Asp
20 25 30
Glu Ala Lys Ile Ala Ser Leu Lys Asp Ser Lys Val Pro Phe Phe Glu
35 40 45
Pro Gly Leu Pro Glu Val Leu Glu Arg Asn Leu Asp Asn Gly Arg Leu
50 55 60
Asn Phe Thr Thr Asp Tyr Ala Glu Ala Ala Ala Phe Ala Gln Val His
65 70 75 80
Phe Leu Gly Val Gly Thr Pro Gln Gln Lys Gly Thr Tyr Ala Ala Asp
85 90 95
Leu Thr Tyr Val Arg Gln Val Val Glu Asp Leu Val Pro Met Leu Glu
100 105 110
Gly Glu His Ile Ile Phe Gly Lys Ser Thr Val Pro Val Gly Thr Ala
115 120 125
Glu Gln Leu Gln Glu Leu Ala Asp Ser Leu Val Lys Pro Gly Ser His
130 135 140
Val Glu Ile Ala Trp Asn Pro Glu Phe Leu Arg Glu Gly Tyr Ala Val
145 150 155 160
Lys Asp Thr Ile Thr Pro Asp Arg Ile Val Val Gly Val Arg Glu Gly
165 170 175
Ala Thr Ala Glu Ala Ile Ala Arg Glu Val Tyr Ser Thr Ala Ile Ala
180 185 190
Ala Asp Thr Pro Phe Leu Val Thr Asp Leu Ala Thr Ala Glu Leu Val
195 200 205
Lys Val Ser Ala Asn Ala Phe Leu Ala Thr Lys Ile Ser Phe Ile Asn
210 215 220
Ala Val Ala Glu Ile Cys Glu Gln Thr Gly Ala Asp Val Val Ala Leu
225 230 235 240
Ala Asp Ala Ile Gly His Asp Asp Arg Ile Gly Arg Lys Phe Leu Gly
245 250 255
Ala Gly Leu Gly Phe Gly Gly Gly Cys Leu Pro Lys Asp Ile Arg Ala
260 265 270
Phe Met Ala Arg Ala Gly Glu Leu Gly Ala Asp Gln Ala Leu Thr Phe
275 280 285
Leu Arg Glu Val Asp Ser Ile Asn Met Arg Arg Arg Asp Arg Val Val
290 295 300
Gln Leu Ala Lys Glu Met Cys Gly Gly Ser Leu Leu Gly Lys Arg Ile
305 310 315 320
Thr Val Leu Gly Ala Ala Phe Lys Pro Asn Ser Asp Asp Val Arg Asp
325 330 335
Ser Pro Ala Leu Ser Val Ala Gly Ser Leu Ser Leu Gln Gly Ala Ala
340 345 350
Val Ser Val Tyr Asp Pro Glu Ala Met Asp Asn Ala Arg Arg Val Phe
355 360 365
Pro Thr Leu Ser Tyr Ala Ser Ser Thr Lys Glu Ala Leu Ile Asp Ala
370 375 380
His Leu Val Val Leu Ala Thr Glu Trp Gln Glu Phe Arg Asp Leu Asp
385 390 395 400
Pro Gln Val Ala Gly Gly Val Val Glu Lys Arg Ala Ile Ile Asp Gly
405 410 415
Arg Asn Val Leu Asp Val Ala Lys Trp Lys Ala Ala Gly Trp Glu Met
420 425 430
Glu Ala Leu Gly Arg Asn Leu
435
<210> 3
<211> 1320
<212> DNA
<213> Artificial Sequence
<400> 3
atgcggatga cagtgattgg tacgggttac cttggcgcta cgcacgcggc ctgcatggct 60
gagcttggcc atgaggttct tggtgttgat gtcgatgagg caaagattgc gtcgttgaag 120
gacagcaagg tcccattttt tgagccgggt ttgcctgagg ttttggagcg caatctggat 180
aatggtcgtc tgaacttcac tactgattat gcggaggctg cggctttcgc gcaggtgcat 240
ttcttgggcg tgggtactct tcagcagaag ggtacttatg cggcggatct gacgtatgtt 300
cgtcaggttg ttgaggattt ggtgccgatg cttgagggtg agcacattat tttcggcaag 360
tctacggttc cggttggtac tgctgagcag ttgcaggagc ttgctgattc tctggtcaag 420
cctggttctc atgtggagat cgcgtggaat ccggagttct tgcgtgaggg ctacgcggtc 480
aaagacacca tcactccgga ccgcatcgtg gtgggtgtgc gtgagggggc gacagcagag 540
gcgatcgctc gggaggttta ctccaccgcg attgctgccg ataccccatt tttggtgact 600
gatcttgcta ccgctgagct ggtgaaagtt tccgcgaatg ctttcttggc caccaagatt 660
tccttcatca atgcggtcgc tgagatttgt gagcagaccg gcgccgatgt ggttgcgctt 720
gcggatgcca tcggtcacga cgatcgtatc ggccgaaagt tcttaggcgc gggcctggga 780
ttcggtggcg gttgcttgcc taaggatatc cgcgcattca tggcgcgcgc gggcgaattg 840
ggcgctgacc aggcacttac cttcctgcgt gaggtcgatt ccatcaacat gcgccgccgt 900
gaccgcgtgg tgcagctggc caaagagatg tgtggcggtt cgctgctggg caagcgcatc 960
acggtactcg gcgccgcatt caaacccaac tcggacgatg tccgcgattc tccggcgttg 1020
tcggtcgctg gctcgctgtc gctccagggt gctgcggtct cggtttacga cccggaagct 1080
atggacaacg ctcgacgcgt cttcccgacg ctcagctatg cgtccagcac taaagaggcg 1140
cttatcgacg cccacctcgt cgttcttgcc actgaatggc aagaattccg cgaccttgac 1200
ccccaagtgg cgggaggggt cgtcgagaag cgcgctatta ttgatggccg aaacgtcctc 1260
gatgttgcca aatggaaggc cgccggctgg gaaatggaag cgctcggccg caacctttag 1320
<210> 4
<211> 439
<212> PRT
<213> Artificial Sequence
<400> 4
Met Arg Met Thr Val Ile Gly Thr Gly Tyr Leu Gly Ala Thr His Ala
1 5 10 15
Ala Cys Met Ala Glu Leu Gly His Glu Val Leu Gly Val Asp Val Asp
20 25 30
Glu Ala Lys Ile Ala Ser Leu Lys Asp Ser Lys Val Pro Phe Phe Glu
35 40 45
Pro Gly Leu Pro Glu Val Leu Glu Arg Asn Leu Asp Asn Gly Arg Leu
50 55 60
Asn Phe Thr Thr Asp Tyr Ala Glu Ala Ala Ala Phe Ala Gln Val His
65 70 75 80
Phe Leu Gly Val Gly Thr Leu Gln Gln Lys Gly Thr Tyr Ala Ala Asp
85 90 95
Leu Thr Tyr Val Arg Gln Val Val Glu Asp Leu Val Pro Met Leu Glu
100 105 110
Gly Glu His Ile Ile Phe Gly Lys Ser Thr Val Pro Val Gly Thr Ala
115 120 125
Glu Gln Leu Gln Glu Leu Ala Asp Ser Leu Val Lys Pro Gly Ser His
130 135 140
Val Glu Ile Ala Trp Asn Pro Glu Phe Leu Arg Glu Gly Tyr Ala Val
145 150 155 160
Lys Asp Thr Ile Thr Pro Asp Arg Ile Val Val Gly Val Arg Glu Gly
165 170 175
Ala Thr Ala Glu Ala Ile Ala Arg Glu Val Tyr Ser Thr Ala Ile Ala
180 185 190
Ala Asp Thr Pro Phe Leu Val Thr Asp Leu Ala Thr Ala Glu Leu Val
195 200 205
Lys Val Ser Ala Asn Ala Phe Leu Ala Thr Lys Ile Ser Phe Ile Asn
210 215 220
Ala Val Ala Glu Ile Cys Glu Gln Thr Gly Ala Asp Val Val Ala Leu
225 230 235 240
Ala Asp Ala Ile Gly His Asp Asp Arg Ile Gly Arg Lys Phe Leu Gly
245 250 255
Ala Gly Leu Gly Phe Gly Gly Gly Cys Leu Pro Lys Asp Ile Arg Ala
260 265 270
Phe Met Ala Arg Ala Gly Glu Leu Gly Ala Asp Gln Ala Leu Thr Phe
275 280 285
Leu Arg Glu Val Asp Ser Ile Asn Met Arg Arg Arg Asp Arg Val Val
290 295 300
Gln Leu Ala Lys Glu Met Cys Gly Gly Ser Leu Leu Gly Lys Arg Ile
305 310 315 320
Thr Val Leu Gly Ala Ala Phe Lys Pro Asn Ser Asp Asp Val Arg Asp
325 330 335
Ser Pro Ala Leu Ser Val Ala Gly Ser Leu Ser Leu Gln Gly Ala Ala
340 345 350
Val Ser Val Tyr Asp Pro Glu Ala Met Asp Asn Ala Arg Arg Val Phe
355 360 365
Pro Thr Leu Ser Tyr Ala Ser Ser Thr Lys Glu Ala Leu Ile Asp Ala
370 375 380
His Leu Val Val Leu Ala Thr Glu Trp Gln Glu Phe Arg Asp Leu Asp
385 390 395 400
Pro Gln Val Ala Gly Gly Val Val Glu Lys Arg Ala Ile Ile Asp Gly
405 410 415
Arg Asn Val Leu Asp Val Ala Lys Trp Lys Ala Ala Gly Trp Glu Met
420 425 430
Glu Ala Leu Gly Arg Asn Leu
435
<210> 5
<211> 1284
<212> DNA
<213> Artificial Sequence
<400> 5
cagtgccaag cttgcatgcc tgcaggtcga ctctagcacg caggaaggta agtgcctggt 60
cagcgcccaa ttcgcccgcg cgcgccatga atgcgcggat atccttaggc aagcaaccgc 120
caccgaatcc caggcccgcg cctaagaact ttcggccgat acgatcgtcg tgaccgatgg 180
catccgcaag cgcaaccaca tcggcgccgg tctgctcaca aatctcagcg accgcattga 240
tgaaggaaat cttggtggcc aagaaagcat tcgcggaaac tttcaccagc tcagcggtag 300
caagatcagt caccaaaaat ggggtatcgg cagcaatcgc ggtggagtaa acctcccgag 360
cgatcgcctc tgctgtcgcc ccctcacgca cacccaccac gatgcggtcc ggagtgatgg 420
tgtctttgac cgcgtagccc tcacgcaaga actccggatt ccacgcgatc tccacatgag 480
aaccaggctt gaccagagaa tcagcaagct cctgcaactg ctcagcagta ccaaccggaa 540
ccgtagactt gccgaaaata atgtgctcac cctcaagcat cggcaccaaa tcctcaacaa 600
cctgacgaac atacgtcaga tccgccgcat aagtaccctt ctgctgaaga gtacccacgc 660
ccaagaaatg cacctgcgcg aaagccgcag cctccgcata atcagtagtg aagttcagac 720
gaccattatc cagattgcgc tccaaaacct caggcaaacc cggctcaaaa aatgggacct 780
tgctgtcctt caacgacgca atctttgcct catcgacatc aacaccaaga acctcatggc 840
caagctcagc catgcaggcc gcgtgcgtag cgccaaggta acccgtacca atcactgtca 900
tccgcatgta gggtgattcc tttcaatgaa gagtggactg gagattatct caacacgttt 960
tgatacagcc cgcgaccgga acacatgatt gcttacttgt tggggaaatt caggtacgcc 1020
ttcgaaggag taggaccacg ctgcccctga tacttcgaac caagcttgcc ggaaccatac 1080
ggagtctccg caggggaact catctggaac aaagccaact gccccacctt catacccggc 1140
cacaacgtga tcggcagatt agccacattg gacaactcca acgtgatgta accactaaaa 1200
ccaggatcaa tgaaaccagc agtagagtgc gtcaacaagc caagacgggt accgagctcg 1260
aattcgtaat catggtcata gctg 1284
<210> 6
<211> 1291
<212> DNA
<213> Artificial Sequence
<400> 6
cagtgccaag cttgcatgcc tgcaggtcga ctctagcacg caggaaggta agtgcctggt 60
cagcgcccaa ttcgcccgcg cgcgccatga atgcgcggat atccttaggc aagcaaccgc 120
caccgaatcc caggcccgcg cctaagaact ttcggccgat acgatcgtcg tgaccgatgg 180
catccgcaag cgcaaccaca tcggcgccgg tctgctcaca aatctcagcg accgcattga 240
tgaaggaaat cttggtggcc aagaaagcat tcgcggaaac tttcaccagc tcagcggtag 300
caagatcagt caccaaaaat ggggtatcgg cagcaatcgc ggtggagtaa acctcccgag 360
cgatcgcctc tgctgtcgcc ccctcacgca cacccaccac gatgcggtcc ggagtgatgg 420
tgtctttgac cgcgtagccc tcacgcaaga actccggatt ccacgcgatc tccacatgag 480
aaccaggctt gaccagagaa tcagcaagct cctgcaactg ctcagcagta ccaaccggaa 540
ccgtagactt gccgaaaata atgtgctcac cctcaagcat cggcaccaaa tcctcaacaa 600
cctgacgaac atacgtcaga tccgccgcat aagtaccctt ctgctgaaga gtacccacgc 660
ccaagaaatg cacctgcgcg aaagccgcag cctccgcata atcagtagtg aagttcagac 720
gaccattatc cagattgcgc tccaaaacct caggcaaacc cggctcaaaa aatgggacct 780
tgctgtcctt caacgacgca atctttgcct catcgacatc aacaccaaga acctcatggc 840
caagctcagc catgcaggcc gcgtgcgtag cgccaaggta acccgtacca atcactgtca 900
tccgcatgta gggtgattcc tttcaatgaa gagtggactg gagattatct caacacgttt 960
tgatacagcc cgcgaccgga acacatgatt gcttacttgt tggggaaatt caggtacgcc 1020
ttcgaaggag taggaccacg ctgcccctga tacttcgaac caagcttgcc ggaaccatac 1080
ggagtctccg caggggaact catctggaac aaagccaact gccccacctt catacccggc 1140
cacaacgtga tcggcagatt agccacattg gacaactcca acgtgatgta accactaaaa 1200
ccaggatcaa tgaaaccagc agtagagtgc gtcaacaagc caagacgggt accgagctcg 1260
aattcgtaat catggtcata gctgtttcct g 1291
<210> 7
<211> 806
<212> DNA
<213> Artificial Sequence
<400> 7
cagtgccaag cttgcatgcc tgcaggtcga ctctagcatg acggctgact ggactcgact 60
tccatacgag gttctggaga agatctccac ccgcatcacc aacgaagttc cagatgtgaa 120
ccgcgtggtt ttggacgtaa cctccaagcc accaggaacc atcgaatggg agtaggcctt 180
aaatgagcct tcgttaagcg gcaatcacct tattggagat tgtcgctttt cccatttctc 240
cgggttttct ggaacttttt gggcgtatgc tgggaatgat tctattattg ccaaatcaga 300
aagcaggaga gacccgatga gcgaaatcct agaaacctat tgggcacccc actttggaaa 360
aaccgaagaa gccacagcac tcgtttcata cctggcacaa gcttccggcg atcccattga 420
ggttcacacc ctgttcgggg atttaggttt agacggactc tcgggaaact acaccgacac 480
tgagattgac ggctacggcg acgcattcct gctggttgca gcgctatccg tgttgatggc 540
tgaaaacaaa gcaacaggtg gcgtgaatct gggtgagctt gggggagctg ataaatcgat 600
ccggctgcat gttgaatcca aggagaacac ccaaatcaac accgcattga agtattttgc 660
gctctcccca gaagaccacg cagcagcaga tcgcttcgat gaggatgacc tgtctgagct 720
tgccaacttg agtgaagagc tgcgcggaca gctggactaa ttgtctccca tttaaggagt 780
ccgattctaa aggttgcggc cgagcg 806
<210> 8
<211> 1445
<212> DNA
<213> Artificial Sequence
<400> 8
cccatttaag gagtccgatt ctaaaggttg cggccgagcg cttccatttc ccagccggcg 60
gccttccatt tggcaacatc gaggacgttt cggccatcaa taatagcgcg cttctcgacg 120
acccctcccg ccacttgggg gtcaaggtcg cggaattctt gccattcagt ggcaagaacg 180
acgaggtggg cgtcgataag cgcctcttta gtgctggacg catagctgag cgtcgggaag 240
acgcgtcgag cgttgtccat agcttccggg tcgtaaaccg agaccgcagc accctggagc 300
gacagcgagc cagcgaccga caacgccgga gaatcgcgga catcgtccga gttgggtttg 360
aatgcggcgc cgagtaccgt gatgcgcttg cccagcagcg aaccgccaca catctctttg 420
gccagctgca ccacgcggtc acggcggcgc atgttgatgg aatcgacctc acgcaggaag 480
gtaagtgcct ggtcagcgcc caattcgccc gcgcgcgcca tgaatgcgcg gatatcctta 540
ggcaagcaac cgccaccgaa tcccaggccc gcgcctaaga actttcggcc gatacgatcg 600
tcgtgaccga tggcatccgc aagcgcaacc acatcggcgc cggtctgctc acaaatctca 660
gcgaccgcat tgatgaagga aatcttggtg gccaagaaag cattcgcgga aactttcacc 720
agctcagcgg tagcaagatc agtcaccaaa aatggggtat cggcagcaat cgcggtggag 780
taaacctccc gagcgatcgc ctctgctgtc gccccctcac gcacacccac cacgatgcgg 840
tccggagtga tggtgtcttt gaccgcgtag ccctcacgca agaactccgg attccacgcg 900
atctccacat gagaaccagg cttgaccaga gaatcagcaa gctcctgcaa ctgctcagca 960
gtaccaaccg gaaccgtaga cttgccgaaa ataatgtgct caccctcaag catcggcacc 1020
aaatcctcaa caacctgacg aacatacgtc agatccgccg cataagtacc cttctgctga 1080
ggagtaccca cgcccaagaa atgcacctgc gcgaaagccg cagcctccgc ataatcagta 1140
gtgaagttca gacgaccatt atccagattg cgctccaaaa cctcaggcaa acccggctca 1200
aaaaatggga ccttgctgtc cttcaacgac gcaatctttg cctcatcgac atcaacacca 1260
agaacctcat ggccaagctc agccatgcag gccgcgtgcg tagcgccaag gtaacccgta 1320
ccaatcactg tcatccgcat gtagggtgat tcctttcaat gaagagtgga ctggagatta 1380
tctcaacacg ttttgataca gcccgcgacc ggaacacatg attgctaaat cgactactca 1440
catag 1445
<210> 9
<211> 1445
<212> DNA
<213> Artificial Sequence
<400> 9
cccatttaag gagtccgatt ctaaaggttg cggccgagcg cttccatttc ccagccggcg 60
gccttccatt tggcaacatc gaggacgttt cggccatcaa taatagcgcg cttctcgacg 120
acccctcccg ccacttgggg gtcaaggtcg cggaattctt gccattcagt ggcaagaacg 180
acgaggtggg cgtcgataag cgcctcttta gtgctggacg catagctgag cgtcgggaag 240
acgcgtcgag cgttgtccat agcttccggg tcgtaaaccg agaccgcagc accctggagc 300
gacagcgagc cagcgaccga caacgccgga gaatcgcgga catcgtccga gttgggtttg 360
aatgcggcgc cgagtaccgt gatgcgcttg cccagcagcg aaccgccaca catctctttg 420
gccagctgca ccacgcggtc acggcggcgc atgttgatgg aatcgacctc acgcaggaag 480
gtaagtgcct ggtcagcgcc caattcgccc gcgcgcgcca tgaatgcgcg gatatcctta 540
ggcaagcaac cgccaccgaa tcccaggccc gcgcctaaga actttcggcc gatacgatcg 600
tcgtgaccga tggcatccgc aagcgcaacc acatcggcgc cggtctgctc acaaatctca 660
gcgaccgcat tgatgaagga aatcttggtg gccaagaaag cattcgcgga aactttcacc 720
agctcagcgg tagcaagatc agtcaccaaa aatggggtat cggcagcaat cgcggtggag 780
taaacctccc gagcgatcgc ctctgctgtc gccccctcac gcacacccac cacgatgcgg 840
tccggagtga tggtgtcttt gaccgcgtag ccctcacgca agaactccgg attccacgcg 900
atctccacat gagaaccagg cttgaccaga gaatcagcaa gctcctgcaa ctgctcagca 960
gtaccaaccg gaaccgtaga cttgccgaaa ataatgtgct caccctcaag catcggcacc 1020
aaatcctcaa caacctgacg aacatacgtc agatccgccg cataagtacc cttctgctga 1080
agagtaccca cgcccaagaa atgcacctgc gcgaaagccg cagcctccgc ataatcagta 1140
gtgaagttca gacgaccatt atccagattg cgctccaaaa cctcaggcaa acccggctca 1200
aaaaatggga ccttgctgtc cttcaacgac gcaatctttg cctcatcgac atcaacacca 1260
agaacctcat ggccaagctc agccatgcag gccgcgtgcg tagcgccaag gtaacccgta 1320
ccaatcactg tcatccgcat gtagggtgat tcctttcaat gaagagtgga ctggagatta 1380
tctcaacacg ttttgataca gcccgcgacc ggaacacatg attgctaaat cgactactca 1440
catag 1445
<210> 10
<211> 783
<212> DNA
<213> Artificial Sequence
<400> 10
cgaccggaac acatgattgc taaatcgact actcacatag ggtcgggcta gtcattctga 60
tcagcgaatt ccacgttcac atcgccaatt ccagagttca caaccagatt cagcattgga 120
ccttctagat cagcattgtg ggcggtgaga tctccaacat cacagcgcgc tgtgcccaca 180
ccggcggtac aacttaggct cacgggcaca tcatcgggca gggtgaccat gacttcgccg 240
atccctgagg tgatttggat gttttgttcc tgatccaatt gggtgaggtg gctgaaatcg 300
aggttcattt cacccacgcc agaggtgtag ctgctgagga gttcatcgtt ggtggggatg 360
agattgacat cgccgattcc agggtcgtct tcaaagtaga tgggatcgat atttgaaata 420
aacaggcctg cgagggcgct catgacaact ccggtaccaa ctacaccgcc gacaatccat 480
ggccacacat ggcgcttttt ctgaggcttt tgtggaggga cttgtacatc ccaggtgttg 540
tattggtttt gggcaagtgg atcccaatga ggcgcttcgg gggtttgttg cgcgaagggt 600
gcatagtagc cctcaacggg ggtgatagtg cttagatctg gttggggttg tgggtagaga 660
tcttcgtttt tcatggtggc atcctcagaa acagtgaatt cagtggtgag tagtccgcgg 720
ggtggaagtg gttgtttctt atgcagggta ccgagctcga attcgtaatc atggtcatag 780
ctg 783
<210> 11
<211> 1669
<212> DNA
<213> Artificial Sequence
<400> 11
gtccgctctg ttggtgttca aggcgatggc cgcacctacg gacacccaat cgtgctgcgc 60
ccagtgtctt ccgaagacgc catgacggct gactggactc gacttccata cgaggttctg 120
gagaagatct ccacccgcat caccaacgaa gttccagatg tgaaccgcgt ggttttggac 180
gtaacctcca agccaccagg aaccatcgaa tgggagtagg ccttaaatga gccttcgtta 240
agcggcaatc accttattgg agattgtcgc ttttcccatt tctccgggtt ttctggaact 300
ttttgggcgt atgctgggaa tgattctatt attgccaaat cagaaagcag gagagacccg 360
atgagcgaaa tcctagaaac ctattgggca ccccactttg gaaaaaccga agaagccaca 420
gcactcgttt catacctggc acaagcttcc ggcgatccca ttgaggttca caccctgttc 480
ggggatttag gtttagacgg actctcggga aactacaccg acactgagat tgacggctac 540
ggcgacgcat tcctgctggt tgcagcgcta tccgtgttga tggctgaaaa caaagcaaca 600
ggtggcgtga atctgggtga gcttggggga gctgataaat cgatccggct gcatgttgaa 660
tccaaggaga acacccaaat caacaccgca ttgaagtatt ttgcgctctc cccagaagac 720
cacgcagcag cagatcgctt cgatgaggat gacctgtctg agcttgccaa cttgagtgaa 780
gagctgcgcg gacagctgga ctaattgtct cccatttaag gagtccgatt ctaaaggttg 840
cggccgagcg cttccatttc ccagccggcg gccttccatt tggcaacatc gaggacgttt 900
cggccatcaa taatagcgcg cttctcgacg acccctcccg ccacttgggg gtcaaggtcg 960
cggaattctt gccattcagt ggcaagaacg acgaggtggg cgtcgataag cgcctcttta 1020
gtgctggacg catagctgag cgtcgggaag acgcgtcgag cgttgtccat agcttccggg 1080
tcgtaaaccg agaccgcagc accctggagc gacagcgagc cagcgaccga caacgccgga 1140
gaatcgcgga catcgtccga gttgggtttg aatgcggcgc cgagtaccgt gatgcgcttg 1200
cccagcagcg aaccgccaca catctctttg gccagctgca ccacgcggtc acggcggcgc 1260
atgttgatgg aatcgacctc acgcaggaag gtaagtgcct ggtcagcgcc caattcgccc 1320
gcgcgcgcca tgaatgcgcg gatatcctta ggcaagcaac cgccaccgaa tcccaggccc 1380
gcgcctaaga actttcggcc gatacgatcg tcgtgaccga tggcatccgc aagcgcaacc 1440
acatcggcgc cggtctgctc acaaatctca gcgaccgcat tgatgaagga aatcttggtg 1500
gccaagaaag cattcgcgga aactttcacc agctcagcgg tagcaagatc agtcaccaaa 1560
aatggggtat cggcagcaat cgcggtggag taaacctccc gagcgatcgc ctctgctgtc 1620
gccccctcac gcacacccac cacgatgcgg tccggagtga tggtgtctt 1669
<210> 12
<211> 1516
<212> DNA
<213> Artificial Sequence
<400> 12
gcattcgcgg aaactttcac cagctcagcg gtagcaagat cagtcaccaa aaatggggta 60
tcggcagcaa tcgcggtgga gtaaacctcc cgagcgatcg cctctgctgt cgccccctca 120
cgcacaccca ccacgatgcg gtccggagtg atggtgtctt tgaccgcgta gccctcacgc 180
aagaactccg gattccacgc gatctccaca tgagaaccag gcttgaccag agaatcagca 240
agctcctgca actgctcagc agtaccaacc ggaaccgtag acttgccgaa aataatgtgc 300
tcaccctcaa gcatcggcac caaatcctca acaacctgac gaacatacgt cagatccgcc 360
gcataagtac ccttctgctg aggagtaccc acgcccaaga aatgcacctg cgcgaaagcc 420
gcagcctccg cataatcagt agtgaagttc agacgaccat tatccagatt gcgctccaaa 480
acctcaggca aacccggctc aaaaaatggg accttgctgt ccttcaacga cgcaatcttt 540
gcctcatcga catcaacacc aagaacctca tggccaagct cagccatgca ggccgcgtgc 600
gtagcgccaa ggtaacccgt accaatcact gtcatccgca tgtagggtga ttcctttcaa 660
tgaagagtgg actggagatt atctcaacac gttttgatac agcccgcgac cggaacacat 720
gattgctaaa tcgactactc acatagggtc gggctagtca ttctgatcag cgaattccac 780
gttcacatcg ccaattccag agttcacaac cagattcagc attggacctt ctagatcagc 840
attgtgggcg gtgagatctc caacatcaca gcgcgctgtg cccacaccgg cggtacaact 900
taggctcacg ggcacatcat cgggcagggt gaccatgact tcgccgatcc ctgaggtgat 960
ttggatgttt tgttcctgat ccaattgggt gaggtggctg aaatcgaggt tcatttcacc 1020
cacgccagag gtgtagctgc tgaggagttc atcgttggtg gggatgagat tgacatcgcc 1080
gattccaggg tcgtcttcaa agtagatggg atcgatattt gaaataaaca ggcctgcgag 1140
ggcgctcatg acaactccgg taccaactac accgccgaca atccatggcc acacatggcg 1200
ctttttctga ggcttttgtg gagggacttg tacatcccag gtgttgtatt ggttttgggc 1260
aagtggatcc caatgaggcg cttcgggggt ttgttgcgcg aagggtgcat agtagccctc 1320
aacgggggtg atagtgctta gatctggttg gggttgtggg tagagatctt cgtttttcat 1380
ggtggcatcc tcagaaacag tgaattcagt ggtgagtagt ccgcggggtg gaagtggttg 1440
tttcttatgc aacgcccacc acatggctaa aaggcaaagg taagtaatgg ctgctgctgg 1500
gccgaatatt cctcca 1516
<210> 13
<211> 1475
<212> DNA
<213> Artificial Sequence
<400> 13
gcttgcatgc ctgcaggtcg actctagagg atccccctaa aggttgcggc cgagcgcttc 60
catttcccag ccggcggcct tccatttggc aacatcgagg acgtttcggc catcaataat 120
agcgcgcttc tcgacgaccc ctcccgccac ttgggggtca aggtcgcgga attcttgcca 180
ttcagtggca agaacgacga ggtgggcgtc gataagcgcc tctttagtgc tggacgcata 240
gctgagcgtc gggaagacgc gtcgagcgtt gtccatagct tccgggtcgt aaaccgagac 300
cgcagcaccc tggagcgaca gcgagccagc gaccgacaac gccggagaat cgcggacatc 360
gtccgagttg ggtttgaatg cggcgccgag taccgtgatg cgcttgccca gcagcgaacc 420
gccacacatc tctttggcca gctgcaccac gcggtcacgg cggcgcatgt tgatggaatc 480
gacctcacgc aggaaggtaa gtgcctggtc agcgcccaat tcgcccgcgc gcgccatgaa 540
tgcgcggata tccttaggca agcaaccgcc accgaatccc aggcccgcgc ctaagaactt 600
tcggccgata cgatcgtcgt gaccgatggc atccgcaagc gcaaccacat cggcgccggt 660
ctgctcacaa atctcagcga ccgcattgat gaaggaaatc ttggtggcca agaaagcatt 720
cgcggaaact ttcaccagct cagcggtagc aagatcagtc accaaaaatg gggtatcggc 780
agcaatcgcg gtggagtaaa cctcccgagc gatcgcctct gctgtcgccc cctcacgcac 840
acccaccacg atgcggtccg gagtgatggt gtctttgacc gcgtagccct cacgcaagaa 900
ctccggattc cacgcgatct ccacatgaga accaggcttg accagagaat cagcaagctc 960
ctgcaactgc tcagcagtac caaccggaac cgtagacttg ccgaaaataa tgtgctcacc 1020
ctcaagcatc ggcaccaaat cctcaacaac ctgacgaaca tacgtcagat ccgccgcata 1080
agtacccttc tgctgaggag tacccacgcc caagaaatgc acctgcgcga aagccgcagc 1140
ctccgcataa tcagtagtga agttcagacg accattatcc agattgcgct ccaaaacctc 1200
aggcaaaccc ggctcaaaaa atgggacctt gctgtccttc aacgacgcaa tctttgcctc 1260
atcgacatca acaccaagaa cctcatggcc aagctcagcc atgcaggccg cgtgcgtagc 1320
gccaaggtaa cccgtaccaa tcactgtcat ccgcatgtag ggtgattcct ttcaatgaag 1380
agtggactgg agattatctc aacacgtttt gatacagccc gcgaccggaa cacatgattg 1440
cgttttggcg gatgagagaa gattttcagc ctgat 1475
<210> 14
<211> 1475
<212> DNA
<213> Artificial Sequence
<400> 14
gcttgcatgc ctgcaggtcg actctagagg atccccctaa aggttgcggc cgagcgcttc 60
catttcccag ccggcggcct tccatttggc aacatcgagg acgtttcggc catcaataat 120
agcgcgcttc tcgacgaccc ctcccgccac ttgggggtca aggtcgcgga attcttgcca 180
ttcagtggca agaacgacga ggtgggcgtc gataagcgcc tctttagtgc tggacgcata 240
gctgagcgtc gggaagacgc gtcgagcgtt gtccatagct tccgggtcgt aaaccgagac 300
cgcagcaccc tggagcgaca gcgagccagc gaccgacaac gccggagaat cgcggacatc 360
gtccgagttg ggtttgaatg cggcgccgag taccgtgatg cgcttgccca gcagcgaacc 420
gccacacatc tctttggcca gctgcaccac gcggtcacgg cggcgcatgt tgatggaatc 480
gacctcacgc aggaaggtaa gtgcctggtc agcgcccaat tcgcccgcgc gcgccatgaa 540
tgcgcggata tccttaggca agcaaccgcc accgaatccc aggcccgcgc ctaagaactt 600
tcggccgata cgatcgtcgt gaccgatggc atccgcaagc gcaaccacat cggcgccggt 660
ctgctcacaa atctcagcga ccgcattgat gaaggaaatc ttggtggcca agaaagcatt 720
cgcggaaact ttcaccagct cagcggtagc aagatcagtc accaaaaatg gggtatcggc 780
agcaatcgcg gtggagtaaa cctcccgagc gatcgcctct gctgtcgccc cctcacgcac 840
acccaccacg atgcggtccg gagtgatggt gtctttgacc gcgtagccct cacgcaagaa 900
ctccggattc cacgcgatct ccacatgaga accaggcttg accagagaat cagcaagctc 960
ctgcaactgc tcagcagtac caaccggaac cgtagacttg ccgaaaataa tgtgctcacc 1020
ctcaagcatc ggcaccaaat cctcaacaac ctgacgaaca tacgtcagat ccgccgcata 1080
agtacccttc tgctgaagag tacccacgcc caagaaatgc acctgcgcga aagccgcagc 1140
ctccgcataa tcagtagtga agttcagacg accattatcc agattgcgct ccaaaacctc 1200
aggcaaaccc ggctcaaaaa atgggacctt gctgtccttc aacgacgcaa tctttgcctc 1260
atcgacatca acaccaagaa cctcatggcc aagctcagcc atgcaggccg cgtgcgtagc 1320
gccaaggtaa cccgtaccaa tcactgtcat ccgcatgtag ggtgattcct ttcaatgaag 1380
agtggactgg agattatctc aacacgtttt gatacagccc gcgaccggaa cacatgattg 1440
cgttttggcg gatgagagaa gattttcagc ctgat 1475
<210> 15
<211> 1514
<212> DNA
<213> Artificial Sequence
<400> 15
agcggataac aatttcacac aggaaacaga attaattaag cttgcatgcc tgcaggtcga 60
ctctagagga tccccctaaa ggttgcggcc gagcgcttcc atttcccagc cggcggcctt 120
ccatttggca acatcgagga cgtttcggcc atcaataata gcgcgcttct cgacgacccc 180
tcccgccact tgggggtcaa ggtcgcggaa ttcttgccat tcagtggcaa gaacgacgag 240
gtgggcgtcg ataagcgcct ctttagtgct ggacgcatag ctgagcgtcg ggaagacgcg 300
tcgagcgttg tccatagctt ccgggtcgta aaccgagacc gcagcaccct ggagcgacag 360
cgagccagcg accgacaacg ccggagaatc gcggacatcg tccgagttgg gtttgaatgc 420
ggcgccgagt accgtgatgc gcttgcccag cagcgaaccg ccacacatct ctttggccag 480
ctgcaccacg cggtcacggc ggcgcatgtt gatggaatcg acctcacgca ggaaggtaag 540
tgcctggtca gcgcccaatt cgcccgcgcg cgccatgaat gcgcggatat ccttaggcaa 600
gcaaccgcca ccgaatccca ggcccgcgcc taagaacttt cggccgatac gatcgtcgtg 660
accgatggca tccgcaagcg caaccacatc ggcgccggtc tgctcacaaa tctcagcgac 720
cgcattgatg aaggaaatct tggtggccaa gaaagcattc gcggaaactt tcaccagctc 780
agcggtagca agatcagtca ccaaaaatgg ggtatcggca gcaatcgcgg tggagtaaac 840
ctcccgagcg atcgcctctg ctgtcgcccc ctcacgcaca cccaccacga tgcggtccgg 900
agtgatggtg tctttgaccg cgtagccctc acgcaagaac tccggattcc acgcgatctc 960
cacatgagaa ccaggcttga ccagagaatc agcaagctcc tgcaactgct cagcagtacc 1020
aaccggaacc gtagacttgc cgaaaataat gtgctcaccc tcaagcatcg gcaccaaatc 1080
ctcaacaacc tgacgaacat acgtcagatc cgccgcataa gtacccttct gctgaggagt 1140
acccacgccc aagaaatgca cctgcgcgaa agccgcagcc tccgcataat cagtagtgaa 1200
gttcagacga ccattatcca gattgcgctc caaaacctca ggcaaacccg gctcaaaaaa 1260
tgggaccttg ctgtccttca acgacgcaat ctttgcctca tcgacatcaa caccaagaac 1320
ctcatggcca agctcagcca tgcaggccgc gtgcgtagcg ccaaggtaac ccgtaccaat 1380
cactgtcatc cgcatgtagg gtgattcctt tcaatgaaga gtggactgga gattatctca 1440
acacgttttg atacagcccg cgaccggaac acatgattgc gttttggcgg atgagagaag 1500
attttcagcc tgat 1514
<210> 16
<211> 1354
<212> DNA
<213> Artificial Sequence
<400> 16
cagtgccaag cttgcatgcc tgcaggtcga ctctagcagc gggcacgatg cgatgtggtt 60
ggcgctggtg tgtggcgcgg cgatcttgtt gattgtggtg ccgatggttc acggaatcaa 120
ctggaaatcg gcagctgcgt tggcgggcac gctggtggca ttgttgttgt cggcagtgtt 180
gtcgtgggcg tcgatcgtca ccacgaattt gcgcggactg ggcgatgaga atcatctgaa 240
gatcatcaac tatttgccgg aggtgtcgat ctctgggttg ctgttggcat cgttcatcat 300
tggtaccttg ggtgtgctca acgatgtgac gatctcacag gcgtcgacca tcaatgagct 360
cgcggaaatc gatgaagatg ccaccccgtg gaggctgttt accggcgcga tgtcggttgg 420
tcgcgaccac atttcctcaa tgatttacac cctggtgttg ggctacaccg gcgcagcttt 480
gccactgttg ctgctgcttt ccttggcaga gcgtccgctg attcagactc tgagcagcga 540
tgttatggcc ggcgagctgc tgcgttcagg tgtcggtgcg ctgacgttga cactggcggt 600
gccgatcacc acgctgatcg ccgcatggac ggtacccggc gatgagcctg ccccagatga 660
tggcaagccc cgcctggtcc accgccagta gggtgattcc tttcaatgaa gagtggactg 720
gagattatct caacacgttt tgatacagcc cgcgaccgga acacatgatt gcttacttgt 780
tggggaaatt caggtacgcc ttcgaaggag taggaccacg ctgcccctga tacttcgaac 840
caagcttgcc ggaaccatac ggagtctccg caggggaact catctggaac aaagccaact 900
gccccacctt catacccggc cacaacgtga tcggcagatt agccacattg gacaactcca 960
acgtgatgta accactaaaa ccaggatcaa tgaaaccagc agtagagtgc gtcaacaagc 1020
caagacgacc aagagacgac ttaccctcca aacgaccagc caaatgcgca ggcaaagtga 1080
acttttccag cgtggacgcc agcacaaact cacccggatg cagaacaaaa ccatcgccgt 1140
cctcaacctc aacaaggctg gtcagctcat cctgattcaa cttagggtca atgtgggtgt 1200
acttagagtt attgaaaacc cggaagtaac ggtccatgcg gacatcgaca ctcgacggct 1260
gaatcagctc agcgtcgaaa ggttcaattc ccaagtcgcc tgcgtcaatt gatttagggt 1320
accgagctcg aattcgtaat catggtcata gctg 1354
Claims (10)
1.一种YH66_14275突变体,是将YH66_14275蛋白质第87位氨基酸残基由脯氨酸突变为其他氨基酸残基得到的蛋白质;
所述YH66_14275蛋白质为如下A1)-A3)中的任一种:
A1)SEQ ID No.2所示的氨基酸序列组成的蛋白质;
A2)将A1)所示的氨基酸序列经过除第87位氨基酸残基以外的一个或几个氨基酸残基的取代和/或缺失和/或添加得到的与细菌产精氨酸相关的蛋白质;
A3)来源于细菌且与A1)或A2)具有95%以上同一性且与细菌产精氨酸相关的蛋白质。
2.根据权利要求1所述的YH66_14275突变体,其特征在于:所述YH66_14275突变体是将YH66_14275蛋白质第87位氨基酸残基由脯氨酸突变为亮氨酸得到的蛋白质。
3.与权利要求1所述YH66_14275突变体相关的生物材料,所述生物材料为如下B1)至B4)中的任一种:
B1)编码权利要求1或2所述YH66_14275突变体的核酸分子;
B2)含有B1)所述核酸分子的表达盒;
B3)含有B1)所述核酸分子的重组载体、或含有B2)所述表达盒的重组载体;
B4)含有B1)所述核酸分子的重组微生物、或含有B2)所述表达盒的重组微生物、或含有B3)所述重组载体的重组微生物。
4.根据权利要求3所述的生物材料,其特征在于:所述核酸分子为如下C1)或C2)中的任一种:
C1)核苷酸序列为SEQ ID No.3的DNA分子;
C2)将SEQ ID No.3所示的核苷酸序列经过修饰和/或一个或几个核苷酸的取代和/或缺失和/或添加得到的与C1)所示的DNA分子具有90%以上的同一性,且具有相同功能的DNA分子。
5.YH66_14275蛋白质或与YH66_14275蛋白质相关的生物材料或权利要求1所述的YH66_14275突变体或权利要求2所述的生物材料在如下X1)至X3)中任一种中的应用:
X1)调控细菌精氨酸产量;
X2)构建产精氨酸工程菌;
X3)制备精氨酸;
所述YH66_14275蛋白质为权利要求1中所述YH66_14275蛋白质;
与YH66_14275蛋白质相关的生物材料为如下D1)至D4)中的任一种:
D1)编码所述YH66_14275蛋白质的核酸分子;
D2)含有D1)所述核酸分子的表达盒;
D3)含有D1)所述核酸分子的重组载体、或含有D2)所述表达盒的重组载体;
D4)含有D1)所述核酸分子的重组微生物、或含有D2)所述表达盒的重组微生物、或含有D3)所述重组载体的重组微生物。
6.提高YH66_14275蛋白质或YH66_14275突变体含量和/或活性的物质或提高YH66_14275基因或YH66_14275突变体基因表达量的物质在如下Y1)至Y3)中任一种中的应用:
Y1)提高细菌精氨酸产量;
Y2)构建产精氨酸工程菌;
Y3)制备精氨酸;
所述YH66_14275蛋白质为权利要求1中所述YH66_14275蛋白质;
所述YH66_14275突变体为权利要求1所述YH66_14275突变体;
所述YH66_14275基因为编码权利要求1中所述YH66_14275蛋白质的基因;
所述YH66_14275突变体基因为编码权利要求1所述YH66_14275突变体的基因。
7.一种提高细菌精氨酸产量的方法,为如下M1)或M2):
所述M1)包括如下步骤:将细菌基因组中的YH66_14275基因替换为YH66_14275突变体基因,实现细菌精氨酸产量的提高;
所述M2)包括如下步骤:提高细菌中YH66_14275蛋白质或YH66_14275突变体含量和/或活性,或提高细菌中YH66_14275基因或YH66_14275突变体基因表达量,实现细菌精氨酸产量的提高;
所述YH66_14275蛋白质为权利要求1中所述YH66_14275蛋白质;
所述YH66_14275突变体为权利要求1所述YH66_14275突变体;
所述YH66_14275基因为编码权利要求1中所述YH66_14275蛋白质的基因;
所述YH66_14275突变体基因为编码权利要求1所述YH66_14275突变体的基因。
8.一种产精氨酸工程菌的构建方法,为如下N1)或N2):
所述N1)包括如下步骤:将细菌基因组中的YH66_14275基因替换为YH66_14275突变体基因,得到所述产精氨酸工程菌;
所述N2)包括如下步骤:提高细菌中YH66_14275蛋白质或YH66_14275突变体含量和/或活性,或提高细菌中YH66_14275基因或YH66_14275突变体基因表达量,得到所述产精氨酸工程菌;
所述YH66_14275蛋白质为权利要求1中所述YH66_14275蛋白质;
所述YH66_14275突变体为权利要求1所述YH66_14275突变体;
所述YH66_14275基因为编码权利要求1中所述YH66_14275蛋白质的基因;
所述YH66_14275突变体基因为编码权利要求1所述YH66_14275突变体的基因。
9.按照权利要求8所述方法构建得到的产精氨酸工程菌在制备精氨酸中的应用。
10.一种制备精氨酸的方法,包括如下步骤:发酵培养按照权利要求8所述方法构建得到的产精氨酸工程菌,得到所述精氨酸。
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