CN1506462A - 磷酸烯醇式丙酮酸羧化酶,编码该酶的基因以及该基因的应用 - Google Patents
磷酸烯醇式丙酮酸羧化酶,编码该酶的基因以及该基因的应用 Download PDFInfo
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- CN1506462A CN1506462A CNA021545952A CN02154595A CN1506462A CN 1506462 A CN1506462 A CN 1506462A CN A021545952 A CNA021545952 A CN A021545952A CN 02154595 A CN02154595 A CN 02154595A CN 1506462 A CN1506462 A CN 1506462A
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Abstract
本发明提供了一种磷酸烯醇式丙酮酸羧化酶,编码该酶的基因以及该基因的应用。所述的基因能显著地降低转基因植株的CO2补偿点和光呼吸速率,提高羧化效率,改善光合特性。
Description
发明领域
本发明涉及磷酸烯醇式丙酮酸羧化酶,编码该酶的基因以及该基因的应用。
发明背景
根据光合途径的特点,绿色植物可以分为C3、C4和景天酸代谢(CAM)途径等三种不同的类型。C3循环是在单细胞中完成的,大气中的CO2直接通过核酮糖-1,5-二磷酸羧化酶/加氧酶(Rubisco)催化的羧化反应进入Calvin循环。而C4循环是在叶肉细胞和维管束鞘细胞中协同完成的(叶肉细胞和维管束鞘细胞排列成花环式结构)。在叶肉细胞中,CO2以HCO3 -的形式被磷酸烯醇式丙酮酸羧化酶(PEPCase)催化固定,形成C4酸草酰乙酸(OAA),OAA被还原为苹果酸(Mal),通过胞间连丝转移到维管束鞘细胞中,再迅速地在脱羧酶催化下重新释放出CO2,参与卡尔文循环,生成糖类。释放CO2后产生的丙酮酸转移到叶肉细胞的叶绿体中,在丙酮酸磷酸二激酶(PPDK)催化下生成无机碳的受体磷酸烯醇式丙酮酸(PEP)(参考Hatch M.D.,1987,Biochim.Biophys.Acta.895:81-106)。
C4植物起源于热带或亚热带,因此C4途径的产生必然与环境有关,有其积极的生物学意义。在高温和强光条件下,C4植物的C4循环机制及维管束鞘细胞的低透气性,使CO2在Rubisco周围被高度浓缩,高浓度的CO2不仅使Rubisco保持了最大的羧化活性,而且抑制了其加氧酶活性。在C4植物中几乎测不出光呼吸,CO2补偿点接近于零或极低(参考H_usler R.E.等,2002,Journal of Experimental Botany 53:591-607)。
由于C4植物利用CO2的能力高,在CO2浓度很低时,还可以固定CO2。因此与C3植物相比,C4植物在高光强、高温及低CO2浓度的条件下,具有高光效的能力。所以这类植物累积干物质速度快,为高产型植物。由此可见,对四碳二羧酸代谢途径的研究,具有相当重要的农业增产价值。然而令人遗憾的是,许多重要的粮食作物(例如水稻)都是光合效率较低的C3植物。从生理上分析,我国现有的高产水稻品种的光能利用率仅为1%~1.5%,与理想的光能利用率3%~5%(参考邱国雄,1992,见:余叔文主编:植物生理学与分子生物学236-243)相比,尚有很大的潜力可挖。人们受到C4光合途径的启发,希望通过转基因技术改造水稻等C3植物,提高叶片的光合能力,进一步提高C3植物的光合效率和产量。
虽然C4和C3途径的酶学基础已经研究得比较清楚,但由于C4与C3植物在形态结构上存在着明显的差异,而且有关C4植物的花环式结构发育所需要的基因以及控制C3和C4途径的基因,在细胞特异性表达机理方面目前也还不甚了解,所以长期以来人们无法肯定将C4途径的少数几个关键基因转化给C3植物之后,是否就可以提高后者的光合效率。
然而最近研究发现,C4水生被子植物黑藻(Hydrilla verticillata)并不具有花环式结构,但它的叶肉细胞却明显地含有C3和C4途径的两种羧化酶PEPCase和Rubisco(参考Magnin N.C.等,1997,Plant Physiol,115:1681-1689),而且C4植物玉米的两个关键的C4型光合酶基因Ppc和Pdk的启动子,能够带动报告基因GUS在水稻叶肉细胞中高水平表达,并以与玉米同样的方式受到光的诱导(参考Matsuoka M.等,1994,Plant J,6:311-319;Matsuoka M.等,1998,J Plant Res,111:333-337)。这些结果表明,有可能通过转基因技术,在C3植物水稻的叶肉细胞中建立起C4光合途径。
磷酸烯醇式丙酮酸羧化酶(PEPCase)由Ppc基因编码,是C4循环途径固定CO2的关键酶,存在于叶肉细胞的胞质中,催化如下不可逆的反应:
有研究将C4植物玉米的C4型Ppc基因转入了C3植物水稻中(参考Ku M.S.B.等,1999,Nat Biotech,17:76-80),获得了明显的效果。在转基因水稻的叶片中,PEPCase的活性提高了20倍。生理指标检测表明,与原种株相比,转Ppc基因的水稻植株的光饱和速率提高55%,CO2补偿点下降27%,表现出在高光强或CO2受到限制的条件下,具有较强的CO2同化能力和较高的转能效率,耐光抑制和耐光氧化的能力增强(参考焦德茂等,2002,科学通报,46:414-417)。
C4植物高粱的Ppc基因家族共有三个成员,其中有两个基因为C3型基因,它们的表达不受光的诱导,在根、黄化叶和绿叶中都有表达,另一个基因为C4型,仅在绿色叶片的叶肉细胞中受光诱导表达,其产物参与C4循环中CO2的固定(参考Lepiniec L.等,1993,Plant Mol Boil,21:487-502)。
发明内容
本发明的一个目的是提供一种新的磷酸烯醇式丙酮酸羧化酶。
本发明的另一个目的是提供一种编码本发明的酶的基因。
本发明的在一个目的是提供本发明的基因的应用。
本发明提供了一种编码磷酸烯醇式丙酮酸羧化酶的基因,该基因具有选自下组的核苷酸序列:
(1)SEQ ID NO:1所示的核苷酸序列;
(2)由于遗传密码的简并性,不同于SEQ ID NO:1但编码的氨基
酸序列与SEQ ID NO:1所编码的氨基酸序列相同的核苷酸序列;
(3)在严谨杂交条件下仍能够与上述(1)或(2)中的序列杂交,
但同时编码具有活性的磷酸烯醇式丙酮酸羧化酶的核苷酸序列。
严谨杂交条件是指,将杂交膜置于预杂交液(0.25mol/L磷酸钠缓冲液,pH7.2,7%SDS)中,65℃预杂交30min;弃预杂交液,加入杂交液(0.25mol/L磷酸钠缓冲液,pH7.2,7%SDS,同位素标记的核苷酸片段),65℃杂交12hr;弃杂交液,加入洗膜液I(20mmol/L磷酸钠缓冲液,pH7.2,5%SDS),65℃洗膜2次,每次30min;加入洗膜液II(20mmol/L磷酸钠缓冲液,pH7.2,1%SDS),65℃洗膜30min。
本发明还提供了一种磷酸烯醇式丙酮酸羧化酶,它具有上述的核苷酸序列编码的氨基酸序列,或者SEQ ID NO:2所示的氨基酸序列。
本发明还提供了上述的磷酸烯醇式丙酮酸羧化酶基因在提高植物的光合效率中的应用。
附图简要说明
图1.高粱C4型Ppc基因的PCR扩增。M.λ DNA/EcoRI+HindIII双酶切分子量标准;1.Ppc基因左侧区段pepcL(3.6Kb);2.Ppc基因右侧区段PepcR(3.4Kb)。
图2.高粱C4型Ppc基因结构简图。□示5’-和3’-侧翼序列,■示外显子,
示内含子,pL5和pL3为扩增此基因左侧区段的引物对,pR5和pR3为扩增此基因右侧区段的引物对,p1和p2为PCR检测转基因植株所用的引物对,掺入α-32P-dCTP的扩增产物作为探针,用于Southern和northern杂交。
图3.高粱C4型Ppc基因的克隆及表达质粒p1301-PEPC的构建流程图。
图4.转基因植株的PCR鉴定。M.λDNA/EcoRI+HindIII双酶切分子量标准;1-14.转基因植株;P.阳性对照质粒p1301-PEPC;N.阴性对照非转基因植株。
图6转基因水稻植株PEPCase的western杂交。S.为高粱,PEPCase活性为26.05μmol/mg chl/hr;C.为水稻对照植株;1-5.为水稻转基因植株。a.为农垦58样品,其中对照植株PEPCase活性为4.57μmol/mg chl/hr,转基因植株为19.8-101.48μmol/mg chl/hr;每泳道上样量0.18μg叶绿素。b.为中花10样品,其中对照植株PEPCase活性为3.72μmol/mg chl/hr,转基因植株为17.47-54.55μmol/mg chl/hr,每泳道上样量0.70μg叶绿素。
图7转基因水稻植株的northern杂交。S.为高粱,PEPCase活性为26.05μmol/mg chl/hr;C.为水稻对照植株;1-5.为水稻转基因植株。a.为农垦58样品,其中对照植株PEPCase活性为4.57μmol/mg chl/hr,转基因植株为19.8-101.48μmol/mg chl/hr;b.为中花10样品,其中对照植株PEPCase活性为3.72μmol/mg chl/hr,转基因植株为17.47-54.55μmol/mgchl/hr。
图8转基因水稻的Southern杂交。P.阳性对照质粒p1301-PEPC;C1.农垦58对照植株;1-4.农垦58转基因植株,PEPCase活性为19.8-101.48μmol/mg chl/hr;C2.中花10对照植株;5-8.中花10转基因植株,PEPCase活性为17.47-54.55μmol/mg chl/hr。
图9转基因植株的光合CO2同化特性。10-C:中花10对照植株;10-1、10-2:中花10转基因植株1、2,PEPCase活性分别为对照的10倍和7.5倍;58-C:农垦58对照植株;58-1、58-2:农垦58转基因植株1、2,PEPCase活性分别为对照的26倍和11倍。A.CO2补偿点;B.光呼吸速率;C.羧化效率。
实施例
1.高粱C4型Ppc基因的隆序列分析
根据Lepiniec等1992年发表的高粱C4型Ppc基因序列[5](GenBankX63756),在5’-末端、3’-末端和基因的中部设计两对引物,以CTAB法提取的高粱(Sorghum vulgare)品种晋中405(购自山西省榆次市种子公司)叶片的基因组DNA为模板,分左侧和右侧两段扩增C4型Ppc基因全长。引物pL5和pL3扩增长度约为3.6kb的左侧区段(pepcL),其中pL5位于Ppc基因启动子上游,其5’-端外加有BglII酶切位点;引物pR5和pR3扩增长度约为3.4kb的右侧区段(pepcR),其中pR3位于Ppc基因转译终止子下游约500bp的位置,其3’-末端外加有HindIII酶切位点;pL3和pR5位于外显子5内部,彼此互补,其内部含有一个XbaI切点。由这两对引物分别扩增得到的pepcL和pepcR片段(图1)通过这一限制性酶切位点可以连接成完整的Ppc基因。为了保证PCR产物的准确性,在PCR反应中采用了适于扩增长片段、且保真性比Taq DNA聚合酶高6倍的高保真的PLATINUM_Taq DNA聚合酶。
引物序列分别为:
pL5:5’-tta
agatcTTAACAGCAGCAAAGCCAAGCC-3’
BgIII
pL3:5’-GCAGCCATCAT
TCTAGACAGCAAG-3’;
XbaI
pR5:5’-CTTGCTG
TCTAGAATGATGGCTGC-3’;
XbaI
pR3:5’-tt
aaagtTCACTATAGCGCCGT TGGATCG-3’。
HindIII
(其中小写字母代表外加酶切位点及保护碱基);
50μl PCR反应体系如下:60mmol/L Tris-SO4(pH8.9),18mmol/L(NH4)2SO4,2mmol/L MgSO4,200μmol/L dNTP,引物pL5和pL3(或pR5和pR3)各0.4μmol/L,~200ng高粱基因组DNA,1U PLATINUM_Taq DNAPolymerase High Fidelity(GIBCO BRL)。在PE2400热循环仪上进行如下PCR反应:94℃预变性1min;94℃变性30sec,55℃退火30sec,68℃延伸4min,进行28个循环;72℃延伸7min。PCR产物在1%琼脂糖凝胶上于1×TAE中作电泳分离。
PCR产物分别与pGEM-T easy载体(Promega公司)连接,转化E.coliXL1-blue菌株(Stratagene公司),酶切鉴定后选取阳性克隆(分别命名为pPEPCL和pPEPCR),送上海博亚生物工程公司测序,与GenBank X63756序列有差异的区段重复测定。
序列分析表明,该基因全长7117bp,含有转录本全长序列5989bp,由10个外显子和9个内含子组成(图2)。与GenBank中登录的高粱C4型Ppc基因序列(X63756)进行同源比较,核苷酸同源性达97.9%,氨基酸同源性达99.2%。核苷酸序列中启动区有个别碱基不同,但CAAT盒和TATA盒的序列和位置没有变化。外显子1-7的序列完全相同;外显子8内部存在5个碱基的差异,第5162、5258和5453位碱基的差异不影响氨基酸编码,第4818位的变化使编码的氨基酸由不带电荷的极性Thr变为非极性的Ala,第4871位的变化使编码的氨基酸由不带电荷的极性Gln变为带负电荷的碱性His;外显子9内第5882位的变化使碱性的Arg变为碱性的Lys;外显子10在第6530、6531和6544位比已知序列X63756多出3个碱基,导致多出一个氨基酸,并使相邻的4个氨基酸编码(Gly-Glu-Arg-Val)因发生移位而改变为(Pro-Ala-Ser-Glu-Tyr)。其余的差异均发生在内含子内部,个别碱基存在差异或缺失,其中最大的差异位于内含子6中,比X63756的相应序列多出一段39bp的片段,导致出现一段32bp序列的串联重复,这一32bp序列3’-端的17bp(黑体表示)在串联重复的上游还存在一个拷贝,而在X63756中仅存在两个拷贝的17bp序列。
2.高粱C4型Ppc基因表达载体的构建
由于Ppc基因是通过PCR方法分两段获得的,所以表达载体的构建分为两步。第一步是将Ppc基因左侧区段pepcL克隆到质粒pCAMBIA1301(Center for the Application of Molecular Biology to InternationalAgriculture,CAMBIA)上。首先对质粒pPEPCL(Ppc基因左侧区段pepcL克隆在pGEM-T easy载体上的重组质粒,见实施例1)进行BglII和XbaI双酶切消化,回收片段pepcL,与经过BamHI和XbaI双酶切的表达载体pCAMBIA1301连接(BglII与BamHI为同尾酶),转化E.coli XL1-blue(Stratagene公司)。挑取转化子菌落扩增培养,提取质粒,用多种限制性内切酶进行酶切鉴定,将其中含有完整pepcL片段的一阳性克隆命名为p1301PEPCL。第二步是将Ppc基因右侧区段pepcR克隆到p1301PEPCL上,通过位于Ppc基因外显子5内部的XbaI切点(位于引物pL3和pR5上)连接为完整的Ppc基因。用HindIII和XbaI双酶切消化质粒pPEPCR,回收片段pepcR,与同样经过HindIII和XbaI双酶切的p1301PEPCL连接,转化E.coli XL1-blue。挑取转化子菌落扩增,提取质粒,酶切鉴定。选取一阳性克隆为我们下一步转化水稻愈伤组织所用的表达载体,命名为p1301-PEPC。图3为Ppc基因的克隆及表达载体p1301-PEPC的构建流程图。
将p1301-PEPC以电击法转化农杆菌EHA105(参考Hood E.E.等,1993,Trans.Res.2:208-218)菌株(使用BIO-RAD公司GENE PULSER II电融合仪),从转化子和非转化子菌落中分别提取质粒DNA为模板,用扩增片段pepcR的引物pR5和pR3进行PCR扩增鉴定。从两个转化子菌落可扩增得到3.4kb的pepcR片段,而非转化子菌落没有扩增产物(图未示出),证明表达载体p1301-PEPC已成功地转化到农杆菌EHA105中,可以用于转化水稻愈伤组织。
3.转高粱C4型Ppc基因的水稻植株的培育
(1)水稻愈伤的诱导
本实验中选用的植物材料为两个粳稻品种:农垦58(由华中农业大学牟同敏教授赠送)和中花10号(由中国农业科学院作物育种栽培研究所李梅芳教授赠送),用成熟胚的盾片诱导愈伤组织。种子去除颖壳后经70%乙醇消毒2min,无菌水冲洗3次,再用0.1%HgCl2表面灭菌15-20min,无菌水漂洗3次。于含有2mg/L 2,4-D的NB培养基上28℃暗培养,2-3周后选取致密的愈伤组织颗粒用于转化。农垦58愈伤组织生长状态良好,颗粒大而密实;中花10号的愈伤组织颗粒比农垦58的略小,且较松散。
(2)转化
农杆菌的培养、愈伤组织侵染、共培养及筛选等步骤采用Hiei和Toki等人的方法(参考Hiei Y等,1994,Plant J,6:271-282;Toki S.,1997,Plant Mol Biol Reporter,15:16-21)。转化中以NB培养基代替N6为基础培养基。农垦58和中花10两个品种愈伤组织的平均转化频率分别可达35.7%和48.1%。将于筛选培养基上培养5-6周后筛选出的生长旺盛、致密的阳性愈伤组织转移至预分化培养基(NB培养基+5mg/L ABA,2mg/L BAP,2mg/L NAA,300mg/L羧苄青霉素,40mg/L潮霉素)上,于28℃暗培养10天,然后转移至分化培养基上28℃光照培养至分化出再生植株。比较了几种分化培养基,我们发现,在含有0.5mg/L TDZ或0.3mg/L TDZ加3.0mg/L BAP和0.5mg/L NAA的NB培养基上,比在无TDZ,仅含有BAP和NAA的NB培养基上,阳性愈伤组织分化出绿色芽点的频率高,但仍然有大部分芽点在继续分化的过程中大部分会逐渐褐化,最终长成再生苗的仅为阳性愈伤的10.0%和10.8%。所以农垦58和中花10愈伤组织的转化效率分别为3.6%和5.2%。当分化的小苗生根后,转移至含有300mg/L羧苄青霉素和40mg/L潮霉素的1/2 MS培养基上生长至10cm左右,移栽到土壤中于温室生长。
4.转高粱C4型Ppc基因的水稻植株的鉴定
(1)PCR检测
待愈伤分化出的小苗移栽至花盆中约一月后,分别取转基因和对照植株的叶片,用CTAB法小量提取总DNA,以位于高粱C4型Ppc基因外显子2和内含子3内的两段序列为引物进行PCR鉴定,引物序列如下:
PW2R:5’-GGGCAAGAAAGACACGTCCA-3’
PW3F:5’-AACGGCGTACCAAACAGAGT-3’
20μl反应体系中含有:1x反应缓冲液,2mmol/L Mg2+,250μmol/LdNTP,引物PW2R和PW3F各为0.4μmol/L,50-100ng转基因植株基因组DNA,1U Taq DNA聚合酶(鼎国公司)。在PE2400热循环仪上进行如下PCR反应:94℃预变性3min;94℃变性45sec,57℃退火45sec,72℃延伸1min 25sec,进行35个循环;72℃延伸7min。PCR产物在1%琼脂糖凝胶上于1×TAE中作电泳分离。在被检测的101株转基因植株中,有93株及质粒阳性对照均可扩增出预期的1.1kb片段,而非转基因植株中没有出现相应的扩增条带(图4)。
(2)PEPCase酶活性的检测和western杂交
PEPCase的提取参照Huang et al的方法(Huang X.Q.等,2002,ActaBot Sin,44:405-412)进行。在晴天的上午9:00-10:00(光强在1,200μmol·m-2·s-1左右),取0.15g成熟水稻叶片的中段,加入1.0ml提取缓冲液(50mmol/L Tris-HCl,pH7.0,10mmol/L MgCl2,1mmol/L EDTA,5mmol/L DTT,5%不溶型PVP),于预冷的研钵中充分研磨,每个样品取25μl用于测定叶绿素含量,其余样品于4℃,15,000g离心10min,取上清用于酶活性检测。PEPCase活性的检测参照Gonzalez et al.的方法(Gonzalez D.L.等,1984,J Plant Physiol,116:425-429),使用BIO-RADSmartSpecTM 3000紫外分光光度计进行。每个反应的总体积为0.5ml,含有50mmol/L Tris-HCl(pH8.0),10mmol/L NaHCO3,10mmol/L MgCl2,0.2mmol/L NADH,1unit NAD-苹果酸脱氢酶,0.1mmol/L EDTA,1mom/LDTT,25μl粗酶提取液,最后加入PEP至终浓度为2mmol/L,立即开始测定反应液OD340的变化值。
8株农垦58未转基因的对照样品PEPCase平均活性为3.76μmol/mgchl/hr,9株中花10对照样品PEPCase平均活性为3.62μmol/mg chl/hr。在同样条件下测定高粱叶片PEPCase的活性是26.05μmol/mg chl/hr,为水稻对照植株的7倍左右。在被测定的58株转基因的农垦58中,22%的植株PEPCase酶活性为对照样品的1-5倍;53%的植株为对照的5-10倍,与高粱叶片中PEPCase的活性相似(图5);个别植株活性是对照样品的26倍,达到101.48μmol/mg chl/hr,为高粱的3.9倍。但当在植株抽穗时重复测定少数样品酶活性时,我们发现对照植株没有明显变化,而转基因植株活性普遍下降21-38%。65株中花10转基因植株结果与农垦58相似。
选择PEPCase活性不同的转基因植株进行western杂交。取PEPCase提取物离心后的上清进行SDS-PAGE分离,浓缩胶为3.9%,分离胶为8%。电泳结束后,将凝胶中的蛋白转移至PVDF膜上进行western杂交。PEPCase的抗体由江苏农科院焦德茂教授赠送,第二抗体为碱性磷酸酶偶联的羊抗兔lgG(北京中山),以BICP/NBT溶液显色。
杂交结果显示,杂交条带的强度与酶活性的高低是基本相吻合的,酶活性低的植株杂交条带弱,而活性高的植株杂交条带强(图6)。
(3)Southern和northern杂交
CTAB法提取转基因和对照植株(取材与western杂交同)叶片的总DNA,每个样品取5μg进行EcoRI酶切,酶切产物于0.8%的琼脂糖凝胶上作电泳分离。使用Trizol(鼎国公司)快速提取转基因和对照植株叶片的总RNA,叶片的取材时间和光照条件同方法3(2)。甲醛电泳分离各样品的总RNA,每泳道上样5μg。按照Zeta-Probe GT Genomic TestedBlotting Membranes(BIO-RAD)说明书中的标准程序分别转膜、杂交,探针为PCR扩增的、掺入α-32P-dCTP标记的高粱C4型Ppc基因内部特异片段[见方法3(1),图2]。使用Fuji X-光片进行放射自显影。
具体的严谨杂交条件如下:将杂交膜置于预杂交液(0.25mol/L磷酸钠缓冲液,pH7.2,7%SDS)中,65℃预杂交30min;弃预杂交液,加入杂交液(0.25mol/L磷酸钠缓冲液,pH7.2,7%SDS,同位素标记的探针),65℃杂交12hr;弃杂交液,加入洗膜液I(20mmol/L磷酸钠缓冲液,pH7.2,5%SDS),65℃洗膜2次,每次30min;加入洗膜液II(20mmol/L磷酸钠缓冲液,pH7.2,1%SDS),65℃洗膜30min。
Northern和Southern杂交显示了与western杂交相同的趋势,酶活性越高的样品杂交条带越强(图7-8),这表明Ppc基因的表达水平与其插入水稻基因组的拷贝数密切相关。
(4)光合CO2同化特性的测定
选取PEPCase活性较高的转基因植株与相应的对照植株,使用开放气路的便携式CO2/H2O分析仪(Ciras-1,PP-systems,UK)测定光合作用气体交换参数。通过变化叶室内CO2浓度来测定叶片胞间CO2浓度(Ci)--光合速率(A)响应曲线(参照Wang Q.等,2002,Science in China(seriesC),2002,45:468-476)。其中光合速率在光强为900μmmol m-2 s-1条件下测定,此光强下被证明所测定的水稻品种均已接近光饱和速率。
与Rubisco酶相比,PEPCase对CO2具有更高的亲和力,在C4碳同化途径中PEPCase起到“CO2泵”的作用,可使CO2在Rubisco酶周围有效地富集,并且提高其周围的CO2/O2比值,增强植物对CO2的利用能力,因而在气体交换特征上C4植物表现为具有更低的CO2补偿点和光呼吸速率。从图9结果可以看到:PEPCase在C3植物水稻中高效表达后,与对照植株相比,其CO2补偿点和光呼吸速率显著下降。推测水稻这种光合特征的改变,是由于PEPCase的高水平表达提高了CO2利用能力引起的。这证明,高粱C4型PEPCase转入水稻后,可以行使与在C4光合途径中相同的功能,有效地改善C3植物的光合特性。
值得注意的是,PEPCase高效表达的植株与对照植株相比,羧化效率(CE)显著提高(图9,C)。CE是反映叶片中Rubisco酶被有效激活的重要指标。所以CE显著提高,可能是由于叶片中有更多的Rubisco酶被有效激活。因PEPCase高水平表达而提高了Rubisco酶活化水平的内在原因,值得进一步探讨。它可能是由于光呼吸的降低累积了更多的ATP分子,富余的ATP分子增强了Rubisco活化酶的活性,从而使更多的Rubisco酶分子处于激活状态。这些推测需要进一步的实验证据。
序列表
<110>中国科学院遗传与发育生物学研究所
<120>磷酸烯醇式丙酮酸羧化酶,编码该酶的基因以及该基因的应用
<130>I020533
<160>8
<170>PatentIn version 3.1
<210>1
<211>7117
<212>DNA
<213>Sorghum vulgare
<220>
<221>CDS
<222>(628)..(780)
<223>
<220>
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<222>(892)..(1284)
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<222>(2607)..(2828)
<223>
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<222>(3610)..(3714)
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<222>(3829)..(3921)
<223>
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<221>CDS
<222>(4415)..(4570)
<223>
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<222>(4719)..(5717)
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<222>(5824)..(6210)
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<400>1
ttaacagcag caaagccaag ccaaaaacga tccaggagca aggtgcggcc gcagctctcc 60
cggtcccctt tgcggttacc actagctaag aatgaagatg gtactctaaa tggatacttg 120
cgcggttttt ctctagtcta acttaataaa ctaaataaac aatttctttc ttattttttt 180
aatttagttc gtttagttag actagagaag aaccacgagg agttatttga agcgtcgtcc 240
ccatccttac cactagctag cactagcaga cacccctctc cacgtcctgc aaacaggcaa 300
ttagccagcg gaataacaca agcaggcaag tgcgcagtga caaagtacgt ccacagcagc 360
gatcccagcc aaaagcagcg tagccacagc cgcgcgcagc tctcggctac ccttaccgcc 420
gatcacatgc atgcctttcc aatcccgcgt gcacacgccg accacacact cgccaactcc 480
ccatccctat ttgaagccac cggccggcgc cctgcattga tcaatcaact cgcagcagag 540
gagcagcacg agcaacacgc cgcgccgcgc tccaaccatc tccagcttcg ttcgcgcttc 600
ccggcccact ccccggccgc cgccgcc atg gcg tcc gag cgg cac cac tcc atc 654
Met Ala Ser Glu Arg His His Ser Ile
1 5
gac gcg cag ctc cgt gcc ctc gca ccc ggc aag gtc tcc gag gag ctc 702
Asp Ala Gln Leu Arg Ala Leu Ala Pro Gly Lys Val Ser Glu Glu Leu
10 15 20 25
atc cag tat gac gcc ctg ctc gtc gac cgc ttc ctc gac atc ctc cag 750
Ile Gln Tyr Asp Ala Leu Leu Val Asp Arg Phe Leu Asp Ile Leu Gln
30 35 40
gac ctc cat ggc ccc agc ctt cgc gaa ttt gtacgtagca gatcgagctg 800
Asp Leu His Gly Pro Ser Leu Arg Glu Phe
45 50
agagcatcat cagctcacct ctctatggtc tatacgtctc gaatccggtg cttactatat 860
atatatatat acccaaatgc gatgcatgca g gtc cag gag tgc tac gag gtg 912
Val Gln Glu Cys Tyr Glu Val
55
tcg gcc gac tac gag ggc aag aaa gac acg tcc aag ctg ggg gag ctg 960
Ser Ala Asp Tyr Glu Gly Lys Lys Asp Thr Ser Lys Leu Gly Glu Leu
60 65 70
gga gcc aag ctg acg ggg ctg gcc ccc gcc gac gcc atc ctg gtg gcg 1008
Gly Ala Lys Leu Thr Gly Leu Ala Pro Ala Asp Ala Ile Leu Val Ala
75 80 85 90
agc tcc atc ctg cac atg ctc aac ctc gcc aac ctg gcg gag gaa gtg 1056
Ser Ser Ile Leu His Met Leu Asn Leu Ala Asn Leu Ala Glu Glu Val
95 100 105
gag ctg gcg cac cgc cgc cgg aac agc aag ctc aag cac ggg gac ttc 1104
Glu Leu Ala His Arg Arg Arg Asn Ser Lys Leu Lys His Gly Asp Phe
110 115 120
tcc gac gag ggc tcc gcc acc acc gag tcc gac atc gag gag acg ctc 1152
Ser Asp Glu Gly Ser Ala Thr Thr Glu Ser Asp Ile Glu Glu Thr Leu
125 130 135
aag cgc ctc gtg tcg ctc ggc aag acc ccc gcg gag gtg ttc gag gcg 1200
Lys Arg Leu Val Ser Leu Gly Lys Thr Pro Ala Glu Val Phe Glu Ala
140 145 150
ctc aag aac cag agc gtc gac ctc gtc ttc acc gcg cat ccc acg cag 1248
Leu Lys Asn Gln Ser Val Asp Leu Val Phe Thr Ala His Pro Thr Gln
155 160 165 170
tcc gcc agg agg tcg ctc ctg cag aaa aac gcc agg tatactacga 1294
Ser Ala Arg Arg Ser Leu Leu Gln Lys Asn Ala Arg
175 180
ctcgatctca ttctgcaatt aatccgcgtc caaatccctt ggatttctgg atcaaaaatg 1354
ttgatctctt gtcgtcgttg cagg atc cgg aat tgt ctg acg cag ctg agt 1405
Ile Arg Asn Cys Leu Thr Gln Leu Ser
185 190
gcc aag gac gtc acg gtc gaa gac aag aag gag ctc gac gag gct ctg 1453
Ala Lys Asp Val Thr Val Glu Asp Lys Lys Glu Leu Asp Glu Ala Leu
195 200 205
cac aga gag gtacgtacat gcatacatgc atttcacaca tctgggaata 1502
His Arg Glu
210
taataacttt atttatcaag agctagcctc ggatatacac acttttacac gattttcctg 1562
caaattcgaa aaccgtttga gccattctcg taaaagtttt tcaatcactg tcctgtcaaa 1622
gtgtctatct ctttttgcgt cgtcgttaca ttttttcttt gatagagata gaatagaagt 1682
ggactcatga gcttaagaca ttgggcacga cacacgtgta actaagtggg ccagagaaat 1742
taatcctcaa ttgatatgtc aatatatatg tttgtgtgag gtgtctggct gcacttcacg 1802
agagcacaag ccttcttcac tctatatata tgaatgagca cgaagaatca tttaaaacat 1862
tgctaacatt taagaatgtc acattatcct attccctagg taatcattac acgaatcaga 1922
acgagcctga tttttctctt tacactataa ttaaaatttt atgaagagtc atattttttc 1982
ccactctatg gaattaaggg tgttttagta attgtccatg ttttattggt agctaatccc 2042
catgtccatt cactctgttt ggtacgccgt tggaaaaata tagacactct atcgagagag 2102
agatcgaatt atatgcaaaa atatgagata cttagaagta aacctgttcc acaagaacca 2162
acatttttat ttaggtcatc tacataaaca aggatgtatg attttcttga ataattatac 2222
agaactttca acaaaagaaa accttcagac tagaccatgt caaactgaga acgcattgtg 2282
atcttgtcag aacaaaattc actatttaca ttaaacaagt accattagtt taatataaga 2342
aacatagaaa ggtgactgaa aactcaatat gcagtttgtt attaggccta cacaataaca 2402
ttttgcacca tctgtaaaga gtctgtgata caaactttaa atgtttcctg atttcaaaaa 2462
aatgaaaaac aaaacttaca gtgttccctc tcttgtgtac catgtttttt gttatgatta 2522
gattgaattc tgtcgttacc ttcactgtat ctatcaattt attttggttg tttagttcta 2582
atttgttttg ttggatgtac acag atc caa gca get tte aga act gat gaa 2633
Ile Gln Ala Ala Phe Arg Thr Asp Glu
215
atc agg aga gca caa ccc acc cca cag gat gaa atg cgc tat ggg atg 2681
Ile Arg Arg Ala Gln Pro Thr Pro Gln Asp Glu Met Arg Tyr Gly Met
220 225 230 235
agc tac atc cat gaa act gta tgg aac ggt gtg cct aag ttt ttg cgc 2729
Ser Tyr Ile His Glu Thr Val Trp Asn Gly Val Pro Lys Phe Leu Arg
240 245 250
cgt gtg gat aca gcc ctg aag aat atc ggc atc aat gag cgc ctt ccc 2777
Arg Val Asp Thr Ala Leu Lys Asn Ile Gly lle Asn Glu Arg Leu Pro
255 260 265
tac gat gtt cct ctc att aag ttc tgt tct tgg atg ggt ggt gac cgt 2825
Tyr Asp Val Pro Leu Ile Lys Phe Cys Ser Trp Met Gly Gly Asp Arg
270 275 280
gat ggtatatttc cacttacttt ttttttaaca aagtggcagg agctctctat 2878
Asp
ctttcaatta aggccctgtt tagattgggg atgaaaattt tttgggtgtc acatcggata 2938
tgttggaaga atgtcgggag gggtctttag aaactaataa aaaacaaatt acatagctca 2998
tcaggaaact gcaagacaaa tctattaagc ataattaatc tgtcattagc acatgtgagt 3058
tactgtagca cttaaggcta atcatagagt aactaggctt aaaagattcg tctcgcgatt 3118
tttaaccaaa ctgtgtaatt agtttatttt tttatgtaca tttaatgttc catgcatgtg 3178
tccaaagatt cgatgggatg gatgaaaaaa ttttgggtag caaaacaggg cctaagagaa 3238
aaacattccc acgagctaga attttaaaat atatattgtt taatacatct gactagtaaa 3298
gaattattta tattgaatta tatgttttgc tctttgttta ttttctaaaa tagacataat 3358
agatactatg tagtctatat ccaattatca caaacttgtt aattattttt ttgcaaagga 3418
ctgatttaga ttcatatttt tacttttcaa cacttctcct atcaaaattc gagcccaatt 3478
ttgttttcta aaaaaaaaga taaactagat ggcggtgtca ttctatttta ttaataattt 3538
aatgttctat agtattgatg ctaatgtttg atgttgttaa gtctgtatat ctttgcattt 3598
ttatcactgt a gga aat cca aga gtt act ccg gag gtg aca aga gat gtg 3648
Gly Asn Pro Arg Val Thr Pro Glu Val Thr Arg Asp Val
285 290 295
tgc ttg ctg tct aga atg atg gct gca aac ttg tac atc aat cag gtc 3696
Cys Leu Leu Ser Arg Met Met Ala Ala Asn Leu Tyr Ile Asn Gln Val
300 305 310
gaa gac ctg atg ttt gag gtactgaaca aatgtgtttg attgaatgct 3744
Glu Asp Leu Met Phe Glu
315
ttgtaatgct ctttttttgt tttgcttgcc atttgtttgg gtgcctccga tccataacaa 3804
tactcatctg atatatgtct ctag ctc tct atg tgg cgc tgc aat gat gag 3855
Leu Ser Met Trp Arg Cys Asn Asp Glu
320 325
ctt cgt gct cga gcc gaa gaa gtc cag agt act cca gct tca aag aaa 3903
Leu Arg Ala Arg Ala Glu Glu Val Gln Ser Thr Pro Ala Ser Lys Lys
330 335 340
gtt acc aag tat tac ata ggtaactaca aacagaagaa tttatttatt 3951
Val Thr Lys Tyr Tyr Ile
345 350
taaattttaa agagactgaa ttagctattc gcgaaaaaag agagagactg aattagctat 4011
tcgcgaaaaa agagagagac tgaattagct aataagcgtt tttagagatg cagattattg 4071
ttagctattg cttattcgta cctcctcata gatttgtctg ccgccactag caaaaataat 4131
agagttctcc tgttttaagt agtagtaaaa aactaccatt aatcatggga attctcacta 4191
gagaggaatt tggtagagaa aattttttct aaatattgaa tgctaaaaat aggagaaccc 4251
acggcactag gacaagttgc agattgtggt tgcgtgcaca ggcttttgca aagtctccac 4311
tagtcttttc aaatttgatt tcaacaatgt tgccccgtgt taattagccg tacgtgtgtc 4371
agtttgccaa tttttctgaa taagagtatt tgatgctggc gca gaa ttc tgg aag 4426
Glu Phe Trp Lys
caa att ccc cca aac gag ccc tac cgg gtg atc ctt ggt gct gta agg 4474
Gln Ile Pro Pro Asn Glu Pro Tyr Arg Val Ile Leu Gly Ala Val Arg
355 360 365 370
gac aag tta tac aac aca cgc gag cgt gca cgc cat ctg ctg gca act 4522
Asp Lys Leu Tyr Asn Thr Arg Glu Arg Ala Arg His Leu Leu Ala Thr
375 380 385
gga ttt tct gaa att tct gag gac gcg gta ttt acc aag atc gaa gag 4570
Gly Phe Ser Glu Ile Ser Glu Asp Ala Val Phe Thr Lys Ile Glu Glu
390 395 400
gtaaataaat cggcaagttc cttaatttta ttccttttgt gaaactgaaa tgtgatttaa 4630
gcgatcaatc aataatatga tggaactact agtacatttc ggtctgattc ttactgtcgc 4690
acaaaaaaaa tgcatctcat gcgtgcag ttc ctt gag ccc ctt gag ctg tgc 4742
Phe Leu Glu Pro Leu Glu Leu Cys
405 410
tac aaa tcc ctg tgt gag tgc ggc gac aag gcc atc gcc gac ggg agc 4790
Tyr Lys Ser Leu Cys Glu Cys Gly Asp Lys Ala Ile Ala Asp Gly Ser
415 420 425
ctc ctg gac ctc ctt cgc cag gtg ttc gcg ttc ggt ctc tcc ctg gtg 4838
Leu Leu Asp Leu Leu Arg Gln Val Phe Ala Phe Gly Leu Ser Leu Val
430 435 440
aag ctg gac atc cgg cag gag tcg gag cgg cac acc gac gtg atc gac 4886
Lys Leu Asp Ile Arg Gln Glu Ser Glu Arg His Thr Asp Val Ile Asp
445 450 455
gcc atc acc acg cac ctc ggc atc ggg tcg tac cgc tcg tgg ccc gag 4934
Ala Ile Thr Thr His Leu Gly Ile Gly Ser Tyr Arg Ser Trp Pro Glu
460 465 470
gac aag cgg atg gag tgg etg gtg tcg gag ctg aaa ggc aag cgc cca 4982
Asp Lys Arg Met Glu Trp Leu Val Ser Glu Leu Lys Gly Lys Arg Pro
475 480 485 490
ctg ctg ccc ccg gac ctt ccc atg acc gag gag atc gcc gac gtc atc 5030
Leu Leu Pro Pro Asp Leu Pro Met Thr Glu Glu Ile Ala Asp Val Ile
495 500 505
ggc gcc atg cgc gtc ctg gcc gag ctc ccg atc gac agc ttc ggc ccc 5078
Gly Ala Met Arg Val Leu Ala Glu Leu Pro Ile Asp Ser Phe Gly Pro
510 515 520
tac atc atc tcc atg tgc acg gcg ccc tcg gac gtg ctc gcc gtc gag 5126
Tyr Ile Ile Ser Met Cys Thr Ala Pro Ser Asp Val Leu Ala Val Glu
525 530 535
ctc ctg cag cgc gag tgt ggc att cgc cag acg ctg ccc gtg gtg ccg 5174
Leu Leu Gln Arg Glu Cys Gly Ile Arg Gln Thr Leu Pro Val Val Pro
540 545 550
ctg ttc gag agg ctg gcc gac ctg cag gcg gcg ccg gcg tcc gtg gag 5222
Leu Phe Glu Arg Leu Ala Asp Leu Gln Ala Ala Pro Ala Ser Val Glu
555 560 565 570
aag ctc ttc tcc act gac tgg tac atc aac cac att aac ggc aag cag 5270
Lys Leu Phe Ser Thr Asp Trp Tyr Ile Asn His Ile Asn Gly Lys Gln
575 580 585
cag gtg atg gtc ggc tac tcc gac tcc ggc aag gac gcc ggc cgc ctg 5318
Gln Val Met Val Gly Tyr Ser Asp Ser Gly Lys Asp Ala Gly Arg Leu
590 595 600
tcc gcg gcg tgg cag ctg tac gtg gcg cag gag gag atg gcc aag gtg 5366
Ser Ala Ala Trp Gln Leu Tyr Val Ala Gln Glu Glu Met Ala Lys Val
605 610 615
gcc aag aag tac ggc gtg aag ctg acc ttg ttc cac ggc cgc ggt ggc 5414
Ala Lys Lys Tyr Gly Val Lys Leu Thr Leu Phe His Gly Arg Gly Gly
620 625 630
acc gtc ggc agg ggc ggt ggc ccg acg cac ctc gcc ata ctg tcc cag 5462
Thr Val Gly Arg Gly Gly Gly Pro Thr His Leu Ala Ile Leu Ser Gln
635 640 645 650
ccg ccg gac acc atc aac ggg tcc atc cgt gtg acg gtg cag ggc gag 5510
Pro Pro Asp Thr Ile Asn Gly Ser Ile Arg Val Thr Val Gln Gly Glu
655 660 665
gtc atc gag ttc atg ttc ggg gag gag aac ctg tgc ttc cag tct ctg 5558
Val Ile Glu Phe Met Phe Gly Glu Glu Asn Leu Cys Phe Gln Ser Leu
670 675 680
cag cgg ttc acg gcc gcc acg ctg gag cac ggc atg cac ccg ccg gtg 5606
Gln Arg Phe Thr Ala Ala Thr Leu Glu His Gly Met His Pro Pro Val
685 690 695
tct ccc aag ccc gag tgg cgc aag ctc atg gag gag atg gcc gtc gtc 5654
Ser Pro Lys Pro Glu Trp Arg Lys Leu Met Glu Glu Met Ala Val Val
700 705 710
gcc acg gag gag tac cgc tcc gtc gtc gtc aag gag ccg cga ttc gtc 5702
Ala Thr Glu Glu Tyr Arg Ser Val Val Val Lys Glu Pro Arg Phe Val
715 720 725 730
gag tac ttc aga tcg gtatgccatc atatatttgt ttgatgtttg gtgaagatcg 5757
Glu Tyr Phe Arg Ser
735
atcgaataat cgaattcatt catccatgtc gtcgttataa ttcattcgtc tgtctttctc 5817
tgtcag gct acc cct gag act gag tac ggg aag atg aac atc ggc agc 5865
Ala Thr Pro Glu Thr Glu Tyr Gly Lys Met Asn Ile Gly Ser
740 745
agg cca gcc aag agg aag ccg ggc ggc ggc atc acc acc ctg cgt gcc 5913
Arg Pro Ala Lys Arg Lys Pro Gly Gly Gly Ile Thr Thr Leu Arg Ala
750 755 760 765
atc ccc tgg atc ttc tcg tgg aca cag acg agg ttc cac ctc ccc gtg 5961
Ile Pro Trp Ile Phe Ser Trp Thr Gln Thr Arg Phe His Leu Pro Val
770 775 780
tgg ctg gga gtc ggc gcc gcc ttc aag tgg gcc atc gac aag gac atc 6009
Trp Leu Gly Val Gly Ala Ala Phe Lys Trp Ala Ile Asp Lys Asp Ile
785 790 795
aag aac ttc cag aag ctc aag gag atg tac aac gag tgg cca ttc ttc 6057
Lys Asn Phe Gln Lys Leu Lys Glu Met Tyr Asn Glu Trp Pro Phe Phe
800 805 810
agg gtc acc ctg gac ctg ctg gag atg gtt ttc gcc aag gga gac cct 6105
Arg Val Thr Leu Asp Leu Leu Glu Met Val Phe Ala Lys Gly Asp Pro
815 820 825
ggc att gcc ggc ttg tac gac gag ctg ctt gtc gcc gag gaa ctc aag 6153
Gly Ile Ala Gly Leu Tyr Asp Glu Leu Leu Val Ala Glu Glu Leu Lys
830 835 840 845
ccc tttggg aag cag ctc agg gac aaa tac gtg gag aca cag cag ctt 6201
Pro Phe Gly Lys Gln Leu Arg Asp Lys Tyr Val Glu Thr Gln Gln Leu
850 855 860
ctc cta cag gtaccttttt ttttaccagc aagttcactg caggaatgat 6250
Leu Leu Gln
attcatgcac tgcagactgc acgatatata tatatatata tattcatgta ctgtactttt 6310
tttttgttgc ag atc gct ggg cac aag gac att ctt gaa ggc gat cct tac 6361
Ile Ala Gly His Lys Asp Ile Leu Glu Gly Asp Pro Tyr
865 870 875
ctg aag cag ggg ctg cgt ctg cgc aat ccc tac atc acc acc ctg aac 6409
Leu Lys Gln Gly Leu Arg Leu Arg Asn Pro Tyr Ile Thr Thr Leu Asn
880 885 890
gtg ttc cag gcc tac acg ctg aag cgg ata agg gac ccc agc ttc aag 6457
Val Phe Gln Ala Tyr Thr Leu Lys Arg Ile Arg Asp Pro Ser Phe Lys
895 900 905
gtg acg ccg cag ccg ccg ctg tcc aag gag ttc gcc gac gag aac aag 6505
Val Thr Pro Gln Pro Pro Leu Ser Lys Glu Phe Ala Asp Glu Asn Lys
910 915 920 925
ccc gcc gga ctg gtg aag ctg aac ccg gcg agc gag tac ccg ccg ggg 6553
Pro Ala Gly Leu Val Lys Leu Asn Pro Ala Ser Glu Tyr Pro Pro Gly
930 935 940
ctg gaa gac acg ctc atc ctc acc atg aag ggt atc gcc gcc ggc atg 6601
Leu Glu Asp Thr Leu Ile Leu Thr Met Lys Gly Ile Ala Ala Gly Met
945 950 955
cag aac acc ggc taggccgctt ccccttcact cacctgcaga gtactgcacg 6653
Gln Asn Thr Gly
960
gcaataataa tcacagcttc cggatggtgg cgttttgtca gttttggatg gagatgctga 6713
aaactgacac cacctgtttt cactatgcat gtttatgtaa tttcctcggc tttggcctct 6773
ttatattttt cactcttgtt gtgaagtcca agtggaaaat cttggcatct taaatatatt 6833
gtaataatga acatcatata atctacaaat ttactattat gtattaatga atcttggcag 6893
ggaaaatgcc actatatatg tatcccagcc cattggatgg acttttttta ccatgatgct 6953
acttcaacca tccctcttta gatagtgcta aacagtttct gaaatctaat gcctggcaat 7013
atatgttacc aattgaatca gtgagagata gcatctactt gattggtaat ttttttggaa 7073
tgatctagtg catttacttg agcgatccaa cggcgctata gtga 7117
<210>2
<211>961
<212>PRT
<213>Sorghum vulgare
<400>2
Met Ala Ser Glu Arg His His Ser Ile Asp Ala Gln Leu Arg Ala Leu
1 5 10 15
Ala Pro Gly Lys Val Ser Glu Glu Leu Ile Gln Tyr Asp Ala Leu Leu
20 25 30
Val Asp Arg Phe Leu Asp Ile Leu Gln Asp Leu His Gly Pro Ser Leu
35 40 45
Arg Glu Phe Val Gln Glu Cys Tyr Glu Val Ser Ala Asp Tyr Glu Gly
50 55 60
Lys Lys Asp Thr Ser Lys Leu Gly Glu Leu Gly Ala Lys Leu Thr Gly
65 70 75 80
Leu Ala Pro Ala Asp Ala Ile Leu Val Ala Ser Ser Ile Leu His Met
85 90 95
Leu Asn Leu Ala Asn Leu Ala Glu Glu Val Glu Leu Ala His Arg Arg
100 105 110
Arg Asn Ser Lys Leu Lys His Gly Asp Phe Ser Asp Glu Gly Ser Ala
115 120 125
Thr Thr Glu Ser Asp Ile Glu Glu Thr Leu Lys Arg Leu Val Ser Leu
130 135 140
Gly Lys Thr Pro Ala Glu Val Phe Glu Ala Leu Lys Asn Gln Ser Val
145 150 155 160
Asp Leu Val Phe Thr Ala His Pro Thr Gln Ser Ala Arg Arg Ser Leu
165 170 175
Leu Gln Lys Asn Ala Arg Ile Arg Asn Cys Leu Thr Gln Leu Ser Ala
180 185 190
Lys Asp Val Thr Val Glu Asp Lys Lys Glu Leu Asp Glu Ala Leu His
195 200 205
Arg Glu Ile Gln Ala Ala Phe Arg Thr Asp Glu Ile Arg Arg Ala Gln
210 215 220
Pro Thr Pro Gln Asp Glu Met Arg Tyr Gly Met Ser Tyr Ile His Glu
225 230 235 240
Thr Val Trp Asn Gly Val Pro Lys Phe Leu Arg Arg Val Asp Thr Ala
245 250 255
Leu Lys Asn Ile Gly Ile Asn Glu Arg Leu Pro Tyr Asp Val Pro Leu
260 265 270
Ile Lys Phe Cys Ser Trp Met Gly Gly Asp Arg Asp Gly Asn Pro Arg
275 280 285
Val Thr Pro Glu Val Thr Arg Asp Val Cys Leu Leu Ser Arg Met Met
290 295 300
Ala Ala Asn Leu Tyr Ile Asn Gln Val Glu Asp Leu Met Phe Glu Leu
305 310 315 320
Ser Met Trp Arg Cys Asn Asp Glu Leu Arg Ala Arg Ala Glu Glu Val
325 330 335
Gln Ser Thr Pro Ala Ser Lys Lys Val Thr Lys Tyr Tyr Ile Glu Phe
340 345 350
Trp Lys Gln Ile Pro Pro Asn Glu Pro Tyr Arg Val Ile Leu Gly Ala
355 360 365
Val Arg Asp Lys Leu Tyr Asn Thr Arg Glu Arg Ala Arg His Leu Leu
370 375 380
Ala Thr Gly Phe Ser Glu Ile Ser Glu Asp Ala Val Phe Thr Lys Ile
385 390 395 400
Glu Glu Phe Leu Glu Pro Leu Glu Leu Cys Tyr Lys Ser Leu Cys Glu
405 410 415
Cys Gly Asp Lys Ala Ile Ala Asp Gly Ser Leu Leu Asp Leu Leu Arg
420 425 430
Gln Val Phe Ala Phe Gly Leu Ser Leu Val Lys Leu Asp Ile Arg Gln
435 440 445
Glu Ser Glu Arg His Thr Asp Val Ile Asp Ala Ile Thr Thr His Leu
450 455 460
Gly Ile Gly Ser Tyr Arg Ser Trp Pro Glu Asp Lys Arg Met Glu Trp
465 470 475 480
Leu Val Ser Glu Leu Lys Gly Lys Arg Pro Leu Leu Pro Pro Asp Leu
485 490 495
Pro Met Thr Glu Glu Ile Ala Asp Val Ile Gly Ala Met Arg Val Leu
500 505 510
Ala Glu Leu Pro Ile Asp Ser Phe Gly Pro Tyr Ile Ile Ser Met Cys
515 520 525
Thr Ala Pro Ser Asp Val Leu Ala Val Glu Leu Leu Gln Arg Glu Cys
530 535 540
Gly Ile Arg Gln Thr Leu Pro Val Val Pro Leu Phe Glu Arg Leu Ala
545 550 555 560
Asp Leu Gln Ala Ala Pro Ala Ser Val Glu Lys Leu Phe Ser Thr Asp
565 570 575
Trp Tyr Ile Asn His Ile Asn Gly Lys Gln Gln Val Met Val Gly Tyr
580 585 590
Ser Asp Ser Gly Lys Asp Ala Gly Arg Leu Ser Ala Ala Trp Gln Leu
595 600 605
Tyr Val Ala Gln Glu Glu Met Ala Lys Val Ala Lys Lys Tyr Gly Val
610 615 620
Lys Leu Thr Leu Phe His Gly Arg Gly Gly Thr Val Gly Arg Gly Gly
625 630 635 640
Gly Pro Thr His Leu Ala Ile Leu Ser Gln Pro Pro Asp Thr Ile Asn
645 650 655
Gly Ser Ile Arg Val Thr Val Gln Gly Glu Val Ile Glu Phe Met Phe
660 665 670
Gly Glu Glu Asn Leu Cys Phe Gln Ser Leu Gln Arg Phe Thr Ala Ala
675 680 685
Thr Leu Glu His Gly Met His Pro Pro Val Ser Pro Lys Pro Glu Trp
690 695 700
Arg Lys Leu Met Glu Glu Met Ala Val Val Ala Thr Glu Glu Tyr Arg
705 710 715 720
Ser Val Val Val Lys Glu Pro Arg Phe Val Glu Tyr Phe Arg Ser Ala
725 730 735
Thr Pro Glu Thr Glu Tyr Gly Lys Met Asn Ile Gly Ser Arg Pro Ala
740 745 750
Lys Arg Lys Pro Gly Gly Gly Ile Thr Thr Leu Arg Ala Ile Pro Trp
755 760 765
Ile Phe Ser Trp Thr Gln Thr Arg Phe His Leu Pro Val Trp Leu Gly
770 775 780
Val Gly Ala Ala Phe Lys Trp Ala Ile Asp Lys Asp Ile Lys Asn Phe
785 790 795 800
Gln Lys Leu Lys Glu Met Tyr Asn Glu Trp Pro Phe Phe Arg Val Thr
805 810 815
Leu Asp Leu Leu Glu Met Val Phe Ala Lys Gly Asp Pro Gly Ile Ala
820 825 830
Gly Leu Tyr Asp Glu Leu Leu Val Ala Glu Glu Leu Lys Pro Phe Gly
835 840 845
Lys Gln Leu Arg Asp Lys Tyr Val Glu Thr Gln Gln Leu Leu Leu Gln
850 855 860
Ile Ala Gly His Lys Asp Ile Leu Glu Gly Asp Pro Tyr Leu Lys Gln
865 870 875 880
Gly Leu Arg Leu Arg Asn Pro Tyr Ile Thr Thr Leu Asn Val Phe Gln
885 890 895
Ala Tyr Thr Leu Lys Arg Ile Arg Asp Pro Ser Phe Lys Val Thr Pro
900 905 910
Gln Pro Pro Leu Ser Lys Glu Phe Ala Asp Glu Asn Lys Pro Ala Gly
915 920 925
Leu Val Lys Leu Asn Pro Ala Ser Glu Tyr Pro Pro Gly Leu Glu Asp
930 935 940
Thr Leu Ile Leu Thr Met Lys Gly Ile Ala Ala Gly Met Gln Asn Thr
945 950 955 960
Gly
<210>3
<211>30
<212>DNA
<213>人工序列
<400>3
ttaagatctt aacagcagca aagccaagcc 30
<210>4
<211>24
<212>DNA
<213>人工序列
<400>4
gcagccatca ttctagacag caag 24
<210>5
<211>24
<212>DNA
<213>人工序列
<400>5
cttgctgtct agaatgatgg ctgc 24
<210>6
<211>30
<212>DNA
<213>人工序列
<400>6
ttaaagcttc actatagcgc cgttggatcg 30
<210>7
<211>20
<212>DNA
<213>人工序列
<400>7
gggcaagaaa gacacgtcca 20
<210>8
<211>20
<212>DNA
<213>人工序列
<400>8
aacggcgtac caaacagagt 20
Claims (3)
1.一种编码磷酸烯醇式丙酮酸羧化酶的基因,该基因具有选自下组的核苷酸序列:
(1)SEQ ID NO:1所示的核苷酸序列;
(2)由于遗传密码的简并性,不同于SEQ ID NO:1但编码的氨基
酸序列与SEQ ID NO:1所编码的氨基酸序列相同的核苷酸序列;
(3)在严谨杂交条件下仍能够与上述(1)或(2)中的序列杂交,
但同时编码具有活性的磷酸烯醇式丙酮酸羧化酶的核苷酸序列。
2.一种磷酸烯醇式丙酮酸羧化酶,它具有权利要求1所述的核苷酸序列编码的氨基酸序列,或者SEQ ID NO:2所示的氨基酸序列。
3.权利要求2所述的磷酸烯醇式丙酮酸羧化酶基因在提高植物的光合效率中的应用。
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CN 02154595 CN1196790C (zh) | 2002-12-10 | 2002-12-10 | 磷酸烯醇式丙酮酸羧化酶,编码该酶的基因以及该基因的应用 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022133917A1 (zh) * | 2020-12-24 | 2022-06-30 | 武汉远大弘元股份有限公司 | 改造的磷酸烯醇丙酮酸羧化酶及其在提高谷氨酸棒杆菌氨基酸产量中的应用 |
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WO2022133917A1 (zh) * | 2020-12-24 | 2022-06-30 | 武汉远大弘元股份有限公司 | 改造的磷酸烯醇丙酮酸羧化酶及其在提高谷氨酸棒杆菌氨基酸产量中的应用 |
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