1w2h

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{{STRUCTURE_1w2h| PDB=1w2h | SCENE= }}
{{STRUCTURE_1w2h| PDB=1w2h | SCENE= }}
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'''CRYSTAL STRUCTURE OF MYCOBACTERIUM TUBERCULOSIS THYMIDYLATE KINASE COMPLEXED WITH AZIDOTHYMIDINE MONOPHOSPHATE (AZT-MP) (2.0 A RESOLUTION)'''
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===CRYSTAL STRUCTURE OF MYCOBACTERIUM TUBERCULOSIS THYMIDYLATE KINASE COMPLEXED WITH AZIDOTHYMIDINE MONOPHOSPHATE (AZT-MP) (2.0 A RESOLUTION)===
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==Overview==
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Tuberculosis (TB) is the primary cause of mortality among infectious diseases. Mycobacterium tuberculosis thymidylate kinase (TMPK(Mtub)) catalyzes the ATP-dependent phosphorylation of deoxythymidine 5'-monophosphate (dTMP). Essential to DNA replication, this enzyme represents a promising target for developing new drugs against TB, because the configuration of its active site is unique within the TMPK family. Indeed, it has been proposed that, as opposed to other TMPKs, catalysis by TMPK(Mtub) necessitates the transient binding of a magnesium ion coordinating the phosphate acceptor. Moreover, 3'-azidodeoxythymidine monophosphate (AZTMP) is a competitive inhibitor of TMPK(Mtub), whereas it is a substrate for human and other TMPKs. Here, the crystal structures of TMPK(Mtub) in complex with deoxythymidine (dT) and AZTMP were determined to 2.1 and 2.0 A resolution, respectively, and suggest a mechanism for inhibition. The azido group of AZTMP perturbs the induced-fit mechanism normally adopted by the enzyme. Magnesium is prevented from binding, and the resulting electrostatic environment precludes phosphoryl transfer from occurring. Our data provide a model for drug development against tuberculosis.
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{{ABSTRACT_PUBMED_15628853}}
==About this Structure==
==About this Structure==
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[[Category: Mycobacterium tuberculosis]]
[[Category: Mycobacterium tuberculosis]]
[[Category: Thymidylate kinase]]
[[Category: Thymidylate kinase]]
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Revision as of 21:19, 28 July 2008

Image:1w2h.png

Template:STRUCTURE 1w2h

CRYSTAL STRUCTURE OF MYCOBACTERIUM TUBERCULOSIS THYMIDYLATE KINASE COMPLEXED WITH AZIDOTHYMIDINE MONOPHOSPHATE (AZT-MP) (2.0 A RESOLUTION)

Template:ABSTRACT PUBMED 15628853

About this Structure

1W2H is a Single protein structure of sequence from Mycobacterium tuberculosis. Full crystallographic information is available from OCA.

Reference

The crystal structure of Mycobacterium tuberculosis thymidylate kinase in complex with 3'-azidodeoxythymidine monophosphate suggests a mechanism for competitive inhibition., Fioravanti E, Adam V, Munier-Lehmann H, Bourgeois D, Biochemistry. 2005 Jan 11;44(1):130-7. PMID:15628853

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