1dyr
From Proteopedia
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|PDB= 1dyr |SIZE=350|CAPTION= <scene name='initialview01'>1dyr</scene>, resolution 1.86Å | |PDB= 1dyr |SIZE=350|CAPTION= <scene name='initialview01'>1dyr</scene>, resolution 1.86Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</scene> | + | |LIGAND= <scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</scene>, <scene name='pdbligand=TOP:TRIMETHOPRIM'>TOP</scene> |
| - | |ACTIVITY= [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] | + | |ACTIVITY= <span class='plainlinks'>[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] </span> |
|GENE= C-DNA P.CARINII DHFR ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4754 Pneumocystis carinii]) | |GENE= C-DNA P.CARINII DHFR ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4754 Pneumocystis carinii]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dyr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dyr OCA], [http://www.ebi.ac.uk/pdbsum/1dyr PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1dyr RCSB]</span> | ||
}} | }} | ||
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[[Category: Delves, C J.]] | [[Category: Delves, C J.]] | ||
[[Category: Stammers, D K.]] | [[Category: Stammers, D K.]] | ||
| - | [[Category: NDP]] | ||
| - | [[Category: TOP]] | ||
[[Category: oxido-reductase]] | [[Category: oxido-reductase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 19:51:29 2008'' |
Revision as of 16:51, 30 March 2008
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| , resolution 1.86Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , | ||||||
| Gene: | C-DNA P.CARINII DHFR (Pneumocystis carinii) | ||||||
| Activity: | Dihydrofolate reductase, with EC number 1.5.1.3 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
THE STRUCTURE OF PNEUMOCYSTIS CARINII DIHYDROFOLATE REDUCTASE TO 1.9 ANGSTROMS RESOLUTION
Overview
BACKGROUND: The fungal pathogen Pneumocystis carinii causes a pneumonia which is an opportunistic infection of AIDS patients. Current therapy includes the dihydrofolate reductase (DHFR) inhibitor trimethoprim which is selective but only a relatively weak inhibitor of the enzyme for P. carinii. Determination of the three-dimensional structure of the enzyme should form the basis for design of more potent and selective therapeutic agents for treatment of the disease. RESULTS: The structure of P. carinii DHFR in complex with reduced nicotinamide adenine dinucleotide phosphate and trimethoprim has accordingly been solved by X-ray crystallography. The structure of the ternary complex has been refined at 1.86 A resolution (R = 0.181). A similar ternary complex with piritrexim (which is a tighter binding, but less selective inhibitor) has also been solved, as has the binary complex holoenzyme, both at 2.5 A resolution. CONCLUSIONS: These structures show how two drugs interact with a fungal DHFR. A comparison of the three-dimensional structure of this relatively large DHFR with bacterial or mammalian enzyme-inhibitor complexes determined previously highlights some additional secondary structure elements in this particular enzyme species. These comparisons provide further insight into the principles governing DHFR-inhibitor interaction, in which the volume of the active site appears to determine the strength of inhibitor binding.
About this Structure
1DYR is a Single protein structure of sequence from Pneumocystis carinii. Full crystallographic information is available from OCA.
Reference
The structure of Pneumocystis carinii dihydrofolate reductase to 1.9 A resolution., Champness JN, Achari A, Ballantine SP, Bryant PK, Delves CJ, Stammers DK, Structure. 1994 Oct 15;2(10):915-24. PMID:7866743
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