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Position: Home > Articles > Cloning and Sequence Analysis of Chinese Cabbage Chitinase Gene CHB4 Acta Horticulturae Sinica 2007,34 (1) 105-110

大白菜几丁质酶基因CHB4的克隆及序列分析

作  者:
甘德芳;朱苏文;范军;程备久
单  位:
安徽农业大学园艺学院;安徽农业大学生命科学学院
关键词:
大白菜;几丁质酶基因;克隆;RACE
摘  要:
根据已知的几种十字花科植物几丁质酶基因保守序列设计特异性引物,以大白菜叶片基因组DNA为模板,通过PCR反应扩增出约1kb的DNA片段和几丁质酶基因5′端序列片段(150bp)。利用不同浓度的水杨酸处理苗龄7d的大白菜,选择酶活力较高的处理植株叶片提取RNA,采用RACE技术扩增。研究结果表明,CHB4基因的DNA序列长度为1517bp(DDBJ登录号:AB257452),包含有1个长度为508bp内含子。该基因编码的产物是由268个氨基酸残基组成的蛋白质,氨基酸序列与油菜ClassⅣ类几丁质酶的同源性达99%,与其它几种高等植物的同源性达50%以上。
译  名:
Cloning and Sequence Analysis of Chinese Cabbage Chitinase Gene CHB4
作  者:
GAN De-fang1,ZHU Su-wen2,FAN Jun2,and CHENG Bei-jiu2*(1School of Horticulture,Anhui Agricultural University,Hefei 230036,China;2School of Life Science,Anhui Agricultural University,Hefei 230036,China)
关键词:
Chinese cabbage;Chitinase gene;Clone;RACE
摘  要:
Based on the conserved sequence of the chitinase of crucifers,about 1 kb DNA fragment and 5'-end fragment(150 bp)were amplified by PCR from genomic DNA of Chinese cabbage.Experiments were performed on 7-day-old Chinese cabbage seedlings after germination with salicylic acid of different concentrations.Total RNA was prepared from the plant with higher chitinase activity,and 3'-end fragment was amplified by 3' RACE.Comparing Chinese cabbage chitinase sequence cloned in this experiment with that reported in GenBank composed of 1 094 bp nucleotide of Brassica napus,the experiment showed that the chitinase sequence of Chinese cabbage is 1 517 bp in size with one intron of 508 bp(DDBJ accession number:AB257452),and shares as high as 99% identity with B.napus and over 50% with other high plants in coding region.

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