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Involvement of a CbbR Homolog in Low CO2-Induced Activation of the Bicarbonate Transporter Operon in Cyanobacteria
TLDR
In the mutants of the cbbR homologs, upregulation of ribulose-1,5-bisphosphate carboxylase/oxygenase operon expression by CO2 limitation was either unaffected (strain PCC 6803) or enhanced (strains PCC 7942), suggesting existence of other low CO2-responsive transcriptional regulator(s) in cyanobacteria. Expand
Identification of an ATP-binding cassette transporter involved in bicarbonate uptake in the cyanobacterium Synechococcus sp. strain PCC 7942.
TLDR
It is demonstrated that the cmpABCD genes encode a high-affinity HCO(3)(-) transporter, which appears to be the first unambiguous identification and description of a primary active H CO(3-) transporter present in the cyanobacterium. Expand
Modes of active inorganic carbon uptake in the cyanobacterium, Synechococcus sp. PCC7942.
TLDR
A speculative model is forward that proposes that two unique proteins, ChpX and ChpY, possess CO2 hydration activity in the light, and when coupled to photosynthetic electron transport through the two specialised NDH-1 complexes, result in net hydration of CO2 to HCO3- as a crucial component of the CO2 uptake process. Expand
Regulation of nitrate assimilation in cyanobacteria.
TLDR
Common features and group- or species-specific characteristics of the response of cyanobacteria to nitrogen is summarized and discussed in terms of ecophysiological significance. Expand
Mechanism of low CO2‐induced activation of the cmp bicarbonate transporter operon by a LysR family protein in the cyanobacterium Synechococcus elongatus strain PCC 7942
TLDR
The results suggest that 2‐phosphoglycolate, which is produced by oxygenation by ribulose‐1,5‐bisphosphate carboxylase/oxygenase (Rubisco), acts as the co‐inducer in the activation of the cmp operon by CmpR, a LysR family transcription factor of CbbR subfamily. Expand
Identification and nitrogen regulation of the cyanase gene from the cyanobacteria Synechocystis sp. strain PCC 6803 and Synechococcus sp. strain PCC 7942
TLDR
Findings indicated that cyanase is an ammonium-repressible enzyme in cyanobacteria, the expression of which is regulated at the level of transcription. Expand
Identification and characterization of two nitrogen-regulated genes of the cyanobacterium Synechococcus sp. strain PCC7942 required for maximum efficiency of nitrogen assimilation
TLDR
Findings suggested that nirB is required for expression of maximum nitrite reductase activity, which seems to regulate utilization of fixed nitrogen by controlling the expression of a certain gene(s) involved in nitrogen metabolism. Expand
Complete nucleotide sequence of the freshwater unicellular cyanobacterium Synechococcus elongatus PCC 6301 chromosome: gene content and organization
TLDR
The entire genome of the unicellular cyanobacterium Synechococcus elongatus PCC 6301 (formerly Anacystis nidulans Berkeley strain 6301) was sequenced, suggesting that only simple signal transduction systems are found in this strain. Expand
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