Chaperonin genes of the Synechocystis PCC 6803 are differentially regulated under light-dark transition during heat stress

被引：48

作者：

Glatz, A ^{[1
]}

Horvath, I ^{[1
]}

Varvasovszki, V ^{[1
]}

Kovacs, E ^{[1
]}

Torok, Z ^{[1
]}

Vigh, L ^{[1
]}

机构：

[1] BIOL RES CTR, INST BIOCHEM, H-6701 SZEGED, HUNGARY

来源：

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS | 1997年 / 239卷 / 01期

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1006/bbrc.1997.7463

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Transcriptional startpoints of the two heat inducible chaperonin genes of Synechocystis PCC 6803 were mapped within the conservative CIRCE element and proved to be identical irrespective of the temperature treatment. Finding of an ORF encoding for a potential CIRCE binding repressor (HrcA) further suggests that both groEL-analogs are regulated in a CIRCE-dependent manner. In contrast to the expectations, the chaperonin twins are differentially expressed under light-dark transition during heat stress. Not the light per se, but rather the photosynthetic electron transport appears to be accountable for the regulatory differences. Our findings support the hypothesis that multiple chaperonins play different physiological roles under stress conditions. (C) 1997 Academic Press.

引用

页码：291 / 297

页数：7

共 32 条

[1] Two different mechanisms are involved in the heat-shock regulation of chaperonin gene expression in Bradyrhizobium japonicum [J].