摘要
综合评述了近年来植物几丁酶的结构与功能、基因表达和调节、录译后加工及分类研究方面所取得的进展．植物几丁酶前体均含Ｎ－端信号肽和催化区，有的还有几丁质结合区和Ｃ－端液泡导向区；植物几丁酶绝大多数可由病原物等生物因素或乙烯等非生物因素诱导，并有组织专化性，有些受发育调节；译后几丁酶前体切除Ｎ－端信号肽→脯氨酸羟基化→切除Ｃ－端信号肽而成为成熟蛋白；几丁酶的分类目前存在两个系统，分别将几丁酶分为５类（ｃｌａｓｓ）或将几丁酶基因分４组（ｇｒｏｕｐ）．
Recent achievements in structure and functions of chitinases,post transcriptional and post translational processes,expression,regularity and classifications of chitinase genes were reviewed Chitinase precursors contain N signal pepride and main catalytic domain.Some have chitin binding domain and or C signal vacule directing peptide.Mose chitnases are inducible by biotic factors such as pathogens or abiotic factors such as ethylene.The inducibility seems to be tissue specific and development regulated.Chitinase precursors become matured proteins by removal of N signal peptide,hydroxylation of proline and removal of C signal peptide.Chitinases were devided into five classes of four groups by two different calssification systems.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
1996年第6期587-602,共16页
Journal of Hunan Agricultural University(Natural Sciences)
关键词
植物
水解酶
分子生物学
几丁酶
plants hydrolases molecular biology research advancements / chitinase
