1w2h
From Proteopedia
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|PDB= 1w2h |SIZE=350|CAPTION= <scene name='initialview01'>1w2h</scene>, resolution 2.0Å | |PDB= 1w2h |SIZE=350|CAPTION= <scene name='initialview01'>1w2h</scene>, resolution 2.0Å | ||
|SITE= <scene name='pdbsite=AC1:Atm+Binding+Site+For+Chain+B'>AC1</scene> | |SITE= <scene name='pdbsite=AC1:Atm+Binding+Site+For+Chain+B'>AC1</scene> | ||
| - | |LIGAND= <scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=ATM:3 | + | |LIGAND= <scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=ATM:3'-AZIDO-3'-DEOXYTHYMIDINE-5'-MONOPHOSPHATE'>ATM</scene> and <scene name='pdbligand=ATM:3'-AZIDO-3'-DEOXYTHYMIDINE-5'-MONOPHOSPHATE'>ATM</scene> |
|ACTIVITY= [http://en.wikipedia.org/wiki/dTMP_kinase dTMP kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.4.9 2.7.4.9] | |ACTIVITY= [http://en.wikipedia.org/wiki/dTMP_kinase dTMP kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.4.9 2.7.4.9] | ||
|GENE= | |GENE= | ||
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[[Category: thymidylate kinase]] | [[Category: thymidylate kinase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 23 14:03:30 2008'' |
Revision as of 12:03, 23 March 2008
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| , resolution 2.0Å | |||||||
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| Sites: | |||||||
| Ligands: | , and | ||||||
| Activity: | dTMP kinase, with EC number 2.7.4.9 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF MYCOBACTERIUM TUBERCULOSIS THYMIDYLATE KINASE COMPLEXED WITH AZIDOTHYMIDINE MONOPHOSPHATE (AZT-MP) (2.0 A RESOLUTION)
Overview
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.
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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