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甘蓝型油菜GPAT9基因克隆与生物信息学分析

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GPA T9基因是参与植物体中油脂代谢的重要基因之一,在甘蓝型油菜中该基因还未被深入研究.为了研究甘蓝型油菜中GPAT9基因,通过查找拟南芥AtGPAT9基因(At5G60620),并以AtGPAT9基因编号到Brassica Database数据库检索到白菜、甘蓝GPA T9基因序列,然后对拟南芥、白菜和甘蓝GPA T9序列进行比对.根据比对结果设计出一对引物,从甘蓝型油菜湘油15中克隆得到一条长度为1 131 bp大小的GPA T9 CDs序列,将其命名为BnGPA T9.BnGPA T9基因共编码376个氨基酸,相对分子量为43.25 kD,等电点为8.97,不稳定系数为46.46;BnGPA T9编码的蛋白有三个跨膜结构域,没有信号肽;该蛋白的二级结构中α螺旋为38.03%,β折叠为21.28%,β转角为9.04%,无规则卷曲为31.65%.分析表明:无论核苷酸序列还是氨基酸序列聚类均显示BnGPA T9与拟南芥、白菜和甘蓝GPAT9亲缘关系近;BnGPAT9具有溶血磷脂酰基转移酶(LPLAT)的结构域LPCATl-like和GPAT9特有的活性位点.从序列分析、理化性质分析、二级结构预测、亚细胞定位和功能结构域分析等都表明克隆到的基因为甘蓝型油菜BnGPA T9基因,属于GPA T基因家族成员.
Cloning and Bioinformatics Analysis of GPAT9 Gene in Rapeseed
GPAT9 is one of the important genes in fat metabolism of plants,but the research of this gene is not in-depth in Brassica napus.Studying the GPAT9 gene of Brassica napus,we designed a pair of primers,and according to the homologous comparsion of B.campestris,B.oleracea and A rabidopsis thaliana GPAT9 sequence,we cloned a full length CDs sequence that has 1 131 bp and that we named BnGPA T9.BnGPAT9 encodes a protein of 376 amino acids with the molecular weights of 43.25 kD,the instability index of 46.46 and the isoelectisc point of 8.97,and it encodes a protein of three TMHs without SignalP.The second structure of BnGPAT9 has 38.03% alpha helix,21.28% beta sheet,9.04% turn and 31.65% coil.Phylogenic tree analysis of BnGPAT9 indicated that BnGPA T9 was closely related to the GPAT9 in B.campestris,B.oleracea and Arabidopsis thaliana.BnGPAT9 possesses LPCAT1-like in Lysophospholipid acyltransferase superfamily and GPAT9 motifs.In terms of sequence comparsion,the analysis of physic-chemical property,subcellular localization and conserved domain,they showed that BnGPAT9 was Xiangyou 15 GPA T9 gene,and it should be the members of GPA Ts.

Brassica napusGPAT9Gene cloneBioinformatics

邢蔓、刘少锋、邬贤梦、官春云、熊兴华

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湖南农业大学作物基因工程湖南省重点实验室,长沙,410128

国家油料改良中心湖南分中心,长沙,410128

甘蓝型油菜 GPAT9 基因克隆 生物信息学

本研究由国家“973”计划项目湖南省科技计划项目

2015CB1502002014FJ1006-3

2016

分子植物育种
海南省生物工程协会

分子植物育种

CSTPCDCSCD北大核心
影响因子:0.765
ISSN:1672-416X
年,卷(期):2016.14(12)
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