Gamma carbonic anhydrase like complex interact with plant mitochondrial complex I

Gamma carbonic anhydrase like complex interact with plant mitochondrial complex I We report the identification by two hybrid screens of two novel similar proteins, called Arabidopsis thaliana gamma carbonic anhydrase like1 and 2 (AtγCAL1 and AtγCAL2), that interact specifically with putative Arabidopsis thaliana gamma Carbonic Anhydrase (AtγCA) proteins in plant mitochondria. The interaction region that was located in the N-terminal 150 amino acids of mature AtγCA and AtγCA like proteins represents a new interaction domain. In vitro experiments indicate that these proteins are imported into mitochondria and are associated with mitochondrial complex I as AtγCAs. All plant species analyzed contain both AtγCA and AtγCAL sequences indicating that these genes were conserved throughout plant evolution. Structural modeling of AtγCAL sequences show a deviation of functionally important active site residues with respect to γCAs but could form active interfaces in the interaction with AtγCAs. We postulate a CA complex tightly associated to plant mitochondrial complex. Plant Molecular Biology Springer Journals

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Kluwer Academic Publishers
Copyright © 2005 by Springer
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
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