1jk7: Difference between revisions
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[[Image:1jk7.jpg|left|200px]] | [[Image:1jk7.jpg|left|200px]] | ||
'''CRYSTAL STRUCTURE OF THE TUMOR-PROMOTER OKADAIC ACID BOUND TO PROTEIN PHOSPHATASE-1''' | {{Structure | ||
|PDB= 1jk7 |SIZE=350|CAPTION= <scene name='initialview01'>1jk7</scene>, resolution 1.90Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=OKA:OKADAIC+ACID'>OKA</scene> and <scene name='pdbligand=BME:BETA-MERCAPTOETHANOL'>BME</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Phosphoprotein_phosphatase Phosphoprotein phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.16 3.1.3.16] | |||
|GENE= | |||
}} | |||
'''CRYSTAL STRUCTURE OF THE TUMOR-PROMOTER OKADAIC ACID BOUND TO PROTEIN PHOSPHATASE-1''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1JK7 is a [ | 1JK7 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JK7 OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structure of the tumor-promoter okadaic acid bound to protein phosphatase-1., Maynes JT, Bateman KS, Cherney MM, Das AK, Luu HA, Holmes CF, James MN, J Biol Chem. 2001 Nov 23;276(47):44078-82. Epub 2001 Sep 4. PMID:[http:// | Crystal structure of the tumor-promoter okadaic acid bound to protein phosphatase-1., Maynes JT, Bateman KS, Cherney MM, Das AK, Luu HA, Holmes CF, James MN, J Biol Chem. 2001 Nov 23;276(47):44078-82. Epub 2001 Sep 4. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11535607 11535607] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Phosphoprotein phosphatase]] | [[Category: Phosphoprotein phosphatase]] | ||
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[[Category: hydrolase-inhibitor complex]] | [[Category: hydrolase-inhibitor complex]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:04:30 2008'' | ||
Revision as of 13:04, 20 March 2008
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| , resolution 1.90Å | |||||||
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| Ligands: | , , and | ||||||
| Activity: | Phosphoprotein phosphatase, with EC number 3.1.3.16 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF THE TUMOR-PROMOTER OKADAIC ACID BOUND TO PROTEIN PHOSPHATASE-1
OverviewOverview
Protein phosphatase-1 (PP1) plays a key role in dephosphorylation in numerous biological processes such as glycogen metabolism, cell cycle regulation, smooth muscle contraction, and protein synthesis. Microorganisms produce a variety of inhibitors of PP1, which include the microcystin class of inhibitors and okadaic acid, the latter being the major cause of diarrhetic shellfish poisoning and a powerful tumor promoter. We have determined the crystal structure of the molecular complex of okadaic acid bound to PP1 to a resolution of 1.9 A. This structure reveals that the acid binds in a hydrophobic groove adjacent to the active site of the protein and interacts with basic residues within the active site. Okadaic acid exhibits a cyclic structure, which is maintained via an intramolecular hydrogen bond. This is reminiscent of other macrocyclic protein phosphatase inhibitors. The inhibitor-bound enzyme shows very little conformational change when compared with two other PP1 structures, except in the inhibitor-sensitive beta12-beta13 loop region. The selectivity of okadaic acid for protein phosphatases-1 and -2A but not PP-2B (calcineurin) may be reassessed in light of this study.
About this StructureAbout this Structure
1JK7 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of the tumor-promoter okadaic acid bound to protein phosphatase-1., Maynes JT, Bateman KS, Cherney MM, Das AK, Luu HA, Holmes CF, James MN, J Biol Chem. 2001 Nov 23;276(47):44078-82. Epub 2001 Sep 4. PMID:11535607
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