Publication: Residues in the acetyl CoA binding site of pyruvate carboxylase involved in allosteric regulation
Issued Date
2015-07-20
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ISSN
18733468
00145793
00145793
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2-s2.0-84937642822
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Mahidol University
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SCOPUS
Bibliographic Citation
FEBS Letters. Vol.589, No.16 (2015), 2073-2079
Suggested Citation
Kamonman Choosangtong, Chaiyos Sirithanakorn, Abdul Adina-Zada, John C. Wallace, Sarawut Jitrapakdee, Paul V. Attwood Residues in the acetyl CoA binding site of pyruvate carboxylase involved in allosteric regulation. FEBS Letters. Vol.589, No.16 (2015), 2073-2079. doi:10.1016/j.febslet.2015.06.034 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/35423
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Title
Residues in the acetyl CoA binding site of pyruvate carboxylase involved in allosteric regulation
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Abstract
© 2015 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved. We have examined the roles of Asp1018, Glu1027, Arg469 and Asp471 in the allosteric domain of Rhizobium etli pyruvate carboxylase. Arg469 and Asp471 interact directly with the allosteric activator acetyl coenzyme A (acetyl CoA) and the R469S and R469K mutants showed increased enzymic activity in the presence and absence of acetyl CoA, whilst the D471A mutant exhibited no acetyl CoA-activation. E1027A, E1027R and D1018A mutants had increased activity in the absence of acetyl CoA, but not in its presence. These results suggest that most of these residues impose restrictions on the structure and/or dynamics of the enzyme to affect activity.