Bicarbonate binding activity of the CmpA protein of the Cyanobacterium Synechococcus sp strain PCC 7942 involved in active transport of bicarbonate.
The cmpABCD operon of the cyanobacterium Synechococcus sp. strain PCC 7942 encodes an ATP-binding cassette transporter involved in HCO3- uptake. The three genes, cmpBCD, encode membrane components of an ATP-binding cassette transporter, whereas cmpA encodes a 42-kDa cytoplasmic membrane protein, which is 46.5% identical to the membrane-anchored substrate-binding protein of the nitrate/nitrite transporter. Equilibrium dialysis analysis using H14CO3- showed that a truncated CmpA protein lacking...[Show more]
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|Source:||Journal of Biological Chemistry|
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