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The thylakoid carbonic anhydrase associated with photosystem II is the component of inorganic carbon accumulating system in cells of halo- and alkaliphilic cyanobacterium Rhabdoderma lineare.
- Source :
-
BBA - Bioenergetics . Jun2007, Vol. 1767 Issue 6, p616-623. 8p. - Publication Year :
- 2007
-
Abstract
- The organization of carbonic anhydrase (CA) system in halo- and alkaliphilic cyanobacterium Rhabdoderma lineare was studied by Western blot analysis and immunocytochemical electron microscopy. The presence of putative extracellular α-CA of 60 kDa in the glycocalyx, forming a tight sheath around the cell, and of two intracellular β-CA is reported. We show for the first time that the β-CA of 60 kDa is expressed constitutively and associated with polypeptides of photosystem II (β-CA-PS II). Another soluble β-CA of 25 kDa was induced in low-bicarbonate medium. Induction of synthesis of the latter β-CA was accompanied by an increase in the intracellular pool of inorganic carbon, which suggests an important role of this enzyme in the functioning of a CO2-concentrating mechanism. [Copyright &y& Elsevier]
- Subjects :
- *THYLAKOIDS
*CHLOROPLASTS
*PARTICLES (Nuclear physics)
*CARBONIC anhydrase
Subjects
Details
- Language :
- English
- ISSN :
- 00052728
- Volume :
- 1767
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- BBA - Bioenergetics
- Publication Type :
- Academic Journal
- Accession number :
- 25321150
- Full Text :
- https://doi.org/10.1016/j.bbabio.2006.12.006