嗜麦芽黄单胞菌CG样受体跨膜域克隆与分析  

Cloning and Analyzing of the Transmembrane Region of CG-like Receptor from X.Maltophilia

作　　者：梁淑芳[1] 陈曼玲[1] 翟朝阳[1] 

机构地区：[1]四川大学华西基础医学与法医学院生化教研室,成都610041

出　　处：《四川大学学报（自然科学版）》2004年第6期1250-1253,共4页Journal of Sichuan University(Natural Science Edition)

摘　　要：根据已知生物LH/CG受体同源性较大的跨膜域序列设计引物,以嗜麦芽黄单胞菌基因组DNA为模板进行PCR扩增,将约600bp目的产物克隆到pUCm T载体上,经酶切及PCR扩增筛选鉴定得到重组质粒pUCm Rec.以DIG标记的PCR扩增片段作为探针进行DNA斑点杂交,确证目的PCR扩增片段与该菌染色体DNA有同源性.克隆到的593bpCG样受体跨膜域序列在GenBank中的注册号为AY355346.再以地高辛标记的593bp跨膜域序列为探针,从构建的该菌基因组文库中,筛选到可能与CG样受体属于同一跨膜受体家族的编码组氨酸激酶/效应调节杂合蛋白部分序列的685bp核酸片段(其在GenBank中的注册号为AY359445).Using one pair of primers designed by the nucleotide sequence of LH/CG receptor transmembrane region with much homology in known species, and the genomic DNA of X.Maltophilia as template to PCR amplify, and about 600bp aim product was cloned in a pUCm-Tvector. Then pUCm-Rec was screened by restriction endonuclease digestion and PCR identification. The DNA dot hybridization with the DIG-labeled 600bp probe showed that the aim amplified product had homology with the genomic DNA of X.Maltophilia. The cloned 593bp transmembrane region of CG-like receptor was registered for accession number AY355346 on GenBank. 685bp nucleotide sequence(GenBank accession number: AY359445)putatively encoding histidine kinase/response regulator hybrid protein, which maybe belongs to the same transmembrane receptor family with CG-like receptor, was screened by using DIG-labeled 593bp as probe from X.Maltophilia genomic library. This provided clues to study the gene structure and function of CG-like receptor.

关 键 词：嗜麦芽黄单胞菌 CG样受体 跨膜域 基因组文库 

分 类 号：Q933[生物学—微生物学] Q936