HIGHLY CLUSTERED ZEIN GENE-SEQUENCES REVEAL EVOLUTIONARY HISTORY OF THE MULTIGENE FAMILY

被引：26

作者：

HEIDECKER, G ^{[1
]}

CHAUDHURI, S ^{[1
]}

MESSING, J ^{[1
]}

机构：

[1] RUTGERS STATE UNIV,WAKSMAN INST,PISCATAWAY,NJ 08855

来源：

GENOMICS | 1991年 / 10卷 / 03期

关键词：

D O I：

10.1016/0888-7543(91)90456-O

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

We have determined the nucleotide sequences of zein cDNA clones ZG14, ZG15, and ZG35. The three clones have 95 to 98% homology to the previously published sequence of clone A20, and 84% homology to sequences of the zein subfamily A30. Comparison of all sequences of the A30 and A20 subfamilies highlights the following features: the 5′ nontranslated regions are 68 and 57 nucleotides in length for the A20- and A30-like mRNAs, respectively, and contain at least three repeats of the consensus sequence ACGAACAAta gG; the majority of these genes are highly clustered as judged from pulsed-field gel electrophoresis of high molecular weight maize DNA. Furthermore, we discuss a model for the evolution of the multigene family which stresses the special importance of unequal crossing-over and gene conversion in this system. © 1991.

引用

页码：719 / 732

页数：14

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