Involvement of a CbbR Homolog in Low CO2-Induced Activation of the Bicarbonate Transporter Operon in Cyanobacteria
- T. Omata, Satoshi Gohta, Yukari Takahashi, Y. Harano, S. Maeda
- BiologyJournal of Bacteriology
- 15 March 2001
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.
Identification of an ATP-binding cassette transporter involved in bicarbonate uptake in the cyanobacterium Synechococcus sp. strain PCC 7942.
- T. Omata, G. Price, M. Badger, M. Okamura, S. Gohta, T. Ogawa
- Biology, Environmental ScienceProceedings of the National Academy of Sciences…
- 9 November 1999
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.
Modes of active inorganic carbon uptake in the cyanobacterium, Synechococcus sp. PCC7942.
- G. Price, S. Maeda, T. Omata, M. Badger
- Biology, Environmental ScienceFunctional Plant Biology
- 1 April 2002
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.
Fractionation of Nitrogen Isotopes during the Uptake and Assimilation of Ammonia by Plants
- T. Yoneyama, T. Omata, S. Nakata, J. Yazaki
- Environmental Science
- 1 December 1991
Regulation of nitrate assimilation in cyanobacteria.
- Y. Ohashi, Wei Shi, T. Omata
- Biology, Environmental ScienceJournal of Experimental Botany
- 1 February 2011
Common features and group- or species-specific characteristics of the response of cyanobacteria to nitrogen is summarized and discussed in terms of ecophysiological significance.
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
- Takashi Nishimura, Yukari Takahashi, O. Yamaguchi, Hiroshi Suzuki, S. Maeda, T. Omata
- Biology, ChemistryMolecular Microbiology
- 1 April 2008
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.
Nitrate assimilatory genes and their transcriptional regulation in a unicellular red alga Cyanidioschyzon merolae: genetic evidence for nitrite reduction by a sulfite reductase-like enzyme.
- S. Imamura, Masaru Terashita, Kan Tanaka
- BiologyPlant and Cell Physiology
- 1 May 2010
An overall scheme for nitrate assimilation in C. merolae is proposed, based on the complete genome sequence, after it was found that a CMG021G null mutant in comparison with the parental strain showed decreased cell growth in nitrate-containing but not in ammonium-containing media.
Identification and nitrogen regulation of the cyanase gene from the cyanobacteria Synechocystis sp. strain PCC 6803 and Synechococcus sp. strain PCC 7942
- Y. Harano, I. Suzuki, S. Maeda, T. Kaneko, S. Tabata, T. Omata
- Biology, EngineeringJournal of Bacteriology
- 1 September 1997
Findings indicated that cyanase is an ammonium-repressible enzyme in cyanobacteria, the expression of which is regulated at the level of transcription.
Primary structure and transcriptional regulation of the gene for nitrite reductase from the cyanobacterium Synechococcus PCC 7942
- I. Suzuki, T. Sugiyama, T. Omata
- 1 December 1993
Substrate-binding Lipoprotein of the Cyanobacterium Synechococcus sp. Strain PCC 7942 Involved in the Transport of Nitrate and Nitrite*
Findings indicated that the nrtA gene product is a nitrate- and nitrite-binding lipoprotein, which is common in cyanobacteria.