2blb: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
[[Image:2blb.gif|left|200px]]<br /> | [[Image:2blb.gif|left|200px]]<br /><applet load="2blb" size="450" color="white" frame="true" align="right" spinBox="true" | ||
<applet load="2blb" size="450" color="white" frame="true" align="right" spinBox="true" | |||
caption="2blb, resolution 3.00Å" /> | caption="2blb, resolution 3.00Å" /> | ||
'''X-RAY CRYSTAL STRUCTURE OF PLASMODIUM VIVAX DIHYDROFOLATE REDUCTASE IN COMPLEX WITH PYRIMETHAMINE AND ITS DERIVATIVE'''<br /> | '''X-RAY CRYSTAL STRUCTURE OF PLASMODIUM VIVAX DIHYDROFOLATE REDUCTASE IN COMPLEX WITH PYRIMETHAMINE AND ITS DERIVATIVE'''<br /> | ||
| Line 8: | Line 7: | ||
==About this Structure== | ==About this Structure== | ||
2BLB is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Plasmodium_vivax Plasmodium vivax] with NDP, CP7 and MES as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Dihydrofolate_reductase Dihydrofolate reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.5.1.3 1.5.1.3] | 2BLB is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Plasmodium_vivax Plasmodium vivax] with NDP, CP7 and MES as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Dihydrofolate_reductase Dihydrofolate reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.5.1.3 1.5.1.3] Known structural/functional Site: <scene name='pdbsite=AC1:Mes Binding Site For Chain A'>AC1</scene>. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=2BLB OCA]. | ||
==Reference== | ==Reference== | ||
| Line 32: | Line 31: | ||
[[Category: pyrimethamine]] | [[Category: pyrimethamine]] | ||
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Dec 18 18:51:02 2007'' | ||
Revision as of 19:41, 18 December 2007
|
X-RAY CRYSTAL STRUCTURE OF PLASMODIUM VIVAX DIHYDROFOLATE REDUCTASE IN COMPLEX WITH PYRIMETHAMINE AND ITS DERIVATIVE
OverviewOverview
Pyrimethamine (Pyr) targets dihydrofolate reductase of Plasmodium vivax, (PvDHFR) as well as other malarial parasites, but its use as antimalarial, is hampered by the widespread high resistance. Comparison of the crystal, structures of PvDHFR from wild-type and the Pyr-resistant (SP21, Ser-58, --> Arg + Ser-117 --> Asn) strain as complexes with NADPH and Pyr or its, analog lacking p-Cl (Pyr20) clearly shows that the steric conflict arising, from the side chain of Asn-117 in the mutant enzyme, accompanied by the, loss of binding to Ser-120, is mainly responsible for the reduction in, binding of Pyr. Pyr20 still effectively inhibits both the wild-type and, SP21 proteins, and the x-ray structures of these complexes show how Pyr20, fits into both active sites without steric strain. These structural, insights suggest a general approach for developing new generations of, antimalarial DHFR inhibitors that, by only occupying substrate space of, the active site, would retain binding affinity with the mutant enzymes.
About this StructureAbout this Structure
2BLB is a Single protein structure of sequence from Plasmodium vivax with NDP, CP7 and MES as ligands. Active as Dihydrofolate reductase, with EC number 1.5.1.3 Known structural/functional Site: . Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of dihydrofolate reductase from Plasmodium vivax: pyrimethamine displacement linked with mutation-induced resistance., Kongsaeree P, Khongsuk P, Leartsakulpanich U, Chitnumsub P, Tarnchompoo B, Walkinshaw MD, Yuthavong Y, Proc Natl Acad Sci U S A. 2005 Sep 13;102(37):13046-51. Epub 2005 Aug 31. PMID:16135570
Page seeded by OCA on Tue Dec 18 18:51:02 2007