Title : Kinetic validation of the models for P-glycoprotein ATP hydrolysis and vanadate-induced trapping. Proposal for additional steps.

Pub. Date : 2014

PMID : 24897122






3 Functional Relationships(s)
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1 P-Glycoprotein has been proposed to hydrolyse ATP by an alternating mechanism, for which there is substantial experimental evidence, including inhibition of catalytic activity by trapping of ortho-vanadate at one nucleotide-binding domain, and the observation of an asymmetric occluded state. Adenosine Triphosphate ATP binding cassette subfamily B member 1 Homo sapiens
2 In this work, we have built several progressively more complex kinetic models, and then carried out simulations and detailed analysis, to test the validity of the proposed reaction pathway employed by P-glycoprotein for ATP hydrolysis. Adenosine Triphosphate ATP binding cassette subfamily B member 1 Homo sapiens
3 To establish kinetic parameters for the catalytic cycle, we made use of the large amount of published data on ATP hydrolysis by hamster P-glycoprotein, both purified and in membrane vesicles. Adenosine Triphosphate ATP binding cassette subfamily B member 1 Homo sapiens