Selection of Shine-Dalgarno sequences in plastids.
Selection of Shine-Dalgarno sequences in plastids.
复制标题
DOI:
10.1093/nar/gkq978
复制
发表时间:
2011-03
影响因子:
14.9
通讯作者:
Bock R
中科院分区:
文献类型:
--
作者:
Drechsel O;Bock R
Like bacterial genes, most plastid (chloroplast) genes are arranged in operons and transcribed as polycistronic mRNAs. Plastid protein biosynthesis occurs on bacterial-type 70S ribosomes and translation initiation of many (but not all) mRNAs is mediated by Shine-Dalgarno (SD) sequences. To study the mechanisms of SD sequence recognition, we have analyzed translation initiation from mRNAs containing multiple SD sequences. Comparing translational efficiencies of identical transgenic mRNAs in Escherichia coli and plastids, we find surprising differences between the two systems. Most importantly, while internal SD sequences are efficiently recognized in E. coli, plastids exhibit a bias toward utilizing predominantly the 5′-most SD sequence. We propose that inefficient recognition of internal SD sequences provides the raison d'être for most plastid polycistronic transcripts undergoing post-transcriptional cleavage into monocistronic mRNAs.
登录
查看更多内容
影响因子:
7.2
作者:
Hashimoto, M;Endo, T;Shikanai, T
通讯作者:
Shikanai, T
影响因子:
14.9
作者:
BORISOVA, GP;VOLKOVA, TM;GREN, EJ
通讯作者:
GREN, EJ
影响因子:
64.8
作者:
BOUVET, P;BELASCO, JG
通讯作者:
BELASCO, JG
影响因子:
11.4
作者:
Barneche, Fredy;Winter, Veronika;Rochaix, Jean-David
通讯作者:
Rochaix, Jean-David
影响因子:
7.2
作者:
Eberhard, S;Drapier, D;Wollman, FA
通讯作者:
Wollman, FA