Expression of two nblA-homologous genes is required for phycobilisome degradation in nitrogen-starved Synechocystis sp PCC6803

被引：36

作者：

Baier, K ^{[1
]}

Nicklisch, S ^{[1
]}

Grundner, C ^{[1
]}

Reinecke, J ^{[1
]}

Lockau, W ^{[1
]}

机构：

[1] Humboldt Univ, Inst Biol Biochem Pflanzen, D-10115 Berlin, Germany

来源：

FEMS MICROBIOLOGY LETTERS | 2001年 / 195卷 / 01期

关键词：

Cyanobacterium; phycobilisome degradation; nitrogen starvation; NblA; Synechocystis sp PCC6803;

D O I：

10.1111/j.1574-6968.2001.tb10494.x

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

One of the responses exhibited by cyanobacteria when they are limited for an essential nutrient is the rapid degradation of their light-harvesting complex, the phycobilisome. Phycobilisome degradation is an ordered proteolytic process. visible by a color change of the cyanobacterial cell from blue-green to yellow-green (chlorosis). The small polypeptide NblA plays a key role in degradation of phycobilisomes in Synechococcus sp. PCC7942. Unlike Synechococcus. Synechocystis sp. PCC6803 has two nblA-homologous genes, nblA1 and nblA2, which are contiguous on the genome. Here we show that nblA1 and nblA2 are simultaneously expressed in Synechocystis 6803 upon nitrogen deprivation. and are both required for phycobilisome degradation. (C) 2001 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

引用

页码：35 / 39

页数：5

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