NblA Gene Expression in Synechocystis PCC 6803 Strains Lacking DspA (Hik33) and a NblR-like Protein

被引：0
作者：
Gérald Zabulon
Catherine Richaud
Chantal Guidi-Rontani
Jean-Claude Thomas
机构：
[1] Ecole Normale Supérieure,Signalisation et Morphogenèse des Diatomées, C.N.R.S. FRE2910, Département de Biologie
来源：
Current Microbiology | 2007年 / 54卷
关键词：
Glutamine Synthetase; Synechocystis; Nitrogen Starvation; Bleaching Process; Echinenon;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Cyanobacteria respond to nutrient-limiting conditions by degrading their phycobilisomes (PBS), the light-harvesting complexes for photosynthesis. In Synechococcus sp. PCC 7942, the expression of nblA, an essential gene in this process, is controlled by the response regulator NblR and the sensor NblS. Here we study the effect of inactivation of dspA (an nblS homologue) and an nblR-like gene on phycobilisome degradation in Synechocystis sp. PCC 6803, under nitrogen starvation. In each mutant, the expression of nblA was found to be unaffected and sequential PBS degradation occurred after nitrogen deprivation (although it was slightly delayed). Our results demonstrate that dspA and nblR-like do not exert a major control of PBS degradation in Synechocystis sp. PCC 6803.
引用
收藏
页码：36 / 41
页数：5
相关论文
共 114 条
  • [1] Allen MM(1968)Simple conditions for growth of unicellular blue-green algae on plates J Phycol 4 1-4
  • [2] Allen MM(1969)Nitrogen chlorosis in blue-green algae Arch Mikrobiol 69 114-120
  • [3] Smith AJ(1995)The Microbiology 14 2915-2920
  • [4] Bartsevich VV(2006) gene product of the cyanobacterium J Biol Chem 281 5216-5223
  • [5] Shestakov SV(1992) sp. strain PCC 6803 influences sensitivity to chemically different growth inhibitors and has amino acid similarity to histidine protein kinases J Bacteriol 174 4718-4726
  • [6] Bienert R(1994)Crystal structure of NblA from EMBO J 13 1039-1047
  • [7] Baier K(1989) sp. PCC 7120, a small protein playing a key role in phycobilisome degradation J Bacteriol 160 1960-1966
  • [8] Volkmer R(1993)Chlorosis induced by nutrient deprivation in J Bacteriol 175 5710-5713
  • [9] Lockau W(2000) sp. strain PCC 7942: not all bleaching is the same Mol Microbiol 35 1192-1201
  • [10] Heinemann U(1994)A small polypeptide triggers complete degradation of light-harvesting phycobiliproteins in nutrient-deprived cyanobacteria Plant Physiol 106 747-754
12345678910