1oxw: Difference between revisions
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[[Image:1oxw.gif|left|200px]] | [[Image:1oxw.gif|left|200px]] | ||
'''The Crystal Structure of SeMet Patatin''' | {{Structure | ||
|PDB= 1oxw |SIZE=350|CAPTION= <scene name='initialview01'>1oxw</scene>, resolution 2.20Å | |||
|SITE= | |||
|LIGAND= | |||
|ACTIVITY= | |||
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'''The Crystal Structure of SeMet Patatin''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1OXW is a [ | 1OXW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Solanum_cardiophyllum Solanum cardiophyllum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OXW OCA]. | ||
==Reference== | ==Reference== | ||
The crystal structure, mutagenesis, and activity studies reveal that patatin is a lipid acyl hydrolase with a Ser-Asp catalytic dyad., Rydel TJ, Williams JM, Krieger E, Moshiri F, Stallings WC, Brown SM, Pershing JC, Purcell JP, Alibhai MF, Biochemistry. 2003 Jun 10;42(22):6696-708. PMID:[http:// | The crystal structure, mutagenesis, and activity studies reveal that patatin is a lipid acyl hydrolase with a Ser-Asp catalytic dyad., Rydel TJ, Williams JM, Krieger E, Moshiri F, Stallings WC, Brown SM, Pershing JC, Purcell JP, Alibhai MF, Biochemistry. 2003 Jun 10;42(22):6696-708. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12779324 12779324] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Solanum cardiophyllum]] | [[Category: Solanum cardiophyllum]] | ||
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[[Category: Stallings, W C.]] | [[Category: Stallings, W C.]] | ||
[[Category: Williams, J M.]] | [[Category: Williams, J M.]] | ||
[[Category: alpha/beta class fold with approximately three | [[Category: alpha/beta class fold with approximately three layer]] | ||
[[Category: alpha/beta/alpha in content. possesses a central six-stranded beta sheet with alpha-helices front & back]] | [[Category: alpha/beta/alpha in content. possesses a central six-stranded beta sheet with alpha-helices front & back]] | ||
''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 13:17:07 2008'' | ||
Revision as of 11:17, 20 March 2008
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| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
The Crystal Structure of SeMet Patatin
Overview
Patatin is a nonspecific lipid acyl hydrolase that accounts for approximately 40% of the total soluble protein in mature potato tubers, and it has potent insecticidal activity against the corn rootworm. We determined the X-ray crystal structure of a His-tagged variant of an isozyme of patatin, Pat17, to 2.2 A resolution, employing SeMet multiwavelength anomalous dispersion (MAD) phasing methods. The patatin crystal structure has three molecules in the asymmetric unit, an R-factor of 22.0%, and an R(free) of 27.2% (for 10% of the data not included in the refinement) and includes 498 water molecules. The structure notably revealed that patatin has a Ser-Asp catalytic dyad and an active site like that of human cytosolic phospholipase A(2) (cPLA(2)) [Dessen, A., et al. (1999) Cell 97, 349-360]. In addition, patatin has a folding topology related to that of the catalytic domain of cPLA(2) and unlike the canonical alpha/beta-hydrolase fold. The structure confirms our site-directed mutagenesis and bioactivity data that initially suggested patatin possessed a Ser-Asp catalytic dyad. Alanine-scanning mutagenesis revealed that Ser77 and Asp215 were critical for both esterase and bioactivity, consistent with prior work implicating a Ser residue [Strickland, J. H., et al. (1995) Plant Physiol. 109, 667-674] and a Ser-Asp dyad [Hirschberg, H. J. H. B., et al. (2001) Eur. J. Biochem. 268, 5037-5044] in patatin's catalytic activity. The crystal structure aids the understanding of other structure-function relationships in patatin. Patatin does not display interfacial activation, a hallmark feature of lipases, and this is likely due to the fact that it lacks a flexible lid that can shield the active site.
About this Structure
1OXW is a Single protein structure of sequence from Solanum cardiophyllum. Full crystallographic information is available from OCA.
Reference
The crystal structure, mutagenesis, and activity studies reveal that patatin is a lipid acyl hydrolase with a Ser-Asp catalytic dyad., Rydel TJ, Williams JM, Krieger E, Moshiri F, Stallings WC, Brown SM, Pershing JC, Purcell JP, Alibhai MF, Biochemistry. 2003 Jun 10;42(22):6696-708. PMID:12779324
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Proteopedia Page Contributors and Editors (what is this?)
- Pages with broken file links
- Single protein
- Solanum cardiophyllum
- Alibhai, M F.
- Brown, S M.
- Krieger, E.
- Moshiri, F.
- Pershing, J C.
- Purcell, J P.
- Rydel, T J.
- Stallings, W C.
- Williams, J M.
- Alpha/beta class fold with approximately three layer
- Alpha/beta/alpha in content. possesses a central six-stranded beta sheet with alpha-helices front & back
