1wpl: Difference between revisions
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|PDB= 1wpl |SIZE=350|CAPTION= <scene name='initialview01'>1wpl</scene>, resolution 2.8Å | |PDB= 1wpl |SIZE=350|CAPTION= <scene name='initialview01'>1wpl</scene>, resolution 2.8Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand= | |LIGAND= <scene name='pdbligand=3PO:TRIPHOSPHATE'>3PO</scene>, <scene name='pdbligand=HBI:7,8-DIHYDROBIOPTERIN'>HBI</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> | ||
|ACTIVITY= [http://en.wikipedia.org/wiki/GTP_cyclohydrolase_I GTP cyclohydrolase I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.4.16 3.5.4.16] | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/GTP_cyclohydrolase_I GTP cyclohydrolase I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.4.16 3.5.4.16] </span> | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY=[[1is7|1is7]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1wpl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wpl OCA], [http://www.ebi.ac.uk/pdbsum/1wpl PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1wpl RCSB]</span> | |||
}} | }} | ||
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[[Category: Maita, N.]] | [[Category: Maita, N.]] | ||
[[Category: Okada, K.]] | [[Category: Okada, K.]] | ||
[[Category: enzyme-regulatory protein complex]] | [[Category: enzyme-regulatory protein complex]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:39:26 2008'' | ||
Revision as of 00:39, 31 March 2008
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| , resolution 2.8Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , , | ||||||
| Activity: | GTP cyclohydrolase I, with EC number 3.5.4.16 | ||||||
| Related: | 1is7
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of the inhibitory form of rat GTP cyclohydrolase I/GFRP complex
OverviewOverview
GTP cyclohydrolase I (GTPCHI) is the rate-limiting enzyme involved in the biosynthesis of tetrahydrobiopterin, a key cofactor necessary for nitric oxide synthase and for the hydroxylases that are involved in the production of catecholamines and serotonin. In animals, the GTPCHI feedback regulatory protein (GFRP) binds GTPCHI to mediate feed-forward activation of GTPCHI activity in the presence of phenylalanine, whereas it induces feedback inhibition of enzyme activity in the presence of biopterin. Here, we have reported the crystal structure of the biopterin-induced inhibitory complex of GTPCHI and GFRP and compared it with the previously reported phenylalanine-induced stimulatory complex. The structure reveals five biopterin molecules located at each interface between GTPCHI and GFRP. Induced fitting structural changes by the biopterin binding expand large conformational changes in GTPCHI peptide segments forming the active site, resulting in inhibition of the activity. By locating 3,4-dihydroxy-phenylalanine-responsive dystonia mutations in the complex structure, we found mutations that may possibly disturb the GFRP-mediated regulation of GTPCHI.
About this StructureAbout this Structure
1WPL is a Protein complex structure of sequences from Rattus norvegicus. Full crystallographic information is available from OCA.
ReferenceReference
Structural basis of biopterin-induced inhibition of GTP cyclohydrolase I by GFRP, its feedback regulatory protein., Maita N, Hatakeyama K, Okada K, Hakoshima T, J Biol Chem. 2004 Dec 3;279(49):51534-40. Epub 2004 Sep 23. PMID:15448133
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