1y9i

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{{STRUCTURE_1y9i| PDB=1y9i | SCENE= }}
{{STRUCTURE_1y9i| PDB=1y9i | SCENE= }}
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'''Crystal structure of low temperature requirement C protein from Listeria monocytogenes'''
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===Crystal structure of low temperature requirement C protein from Listeria monocytogenes===
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==Overview==
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Phosphatidylglycerophosphatase (PGPase), an enzyme involved in lipid metabolism, catalyzes formation of phosphatidylglycerol from phosphatidylglycerophosphate. Phosphatidylglycerol is a multifunctional phospholipid, found in the biological membranes of many organisms. Here, we report the crystal structure of Listeria monocytogenes PGPase at 1.8 A resolution. PGPase, an all-helical molecule, forms a homotetramer. Each protomer contains an independent active site with two metal ions, Ca(2+) and Mg(2+), forming a hetero-binuclear center located in a hydrophilic cavity near the surface of the molecule. The binuclear center, conserved ligands, metal-bound water molecules, and an Asp-His dyad form the active site. The catalytic mechanism of this enzyme is likely to proceed via binuclear metal activated nucleophilic water. The binuclear metal-binding active-site environment of this structure should provide insights into substrate binding and metal-dependent catalysis. A long channel with inter-linked linear water chains, termed "proton wires," is observed at the tetramer interface. Comparison of similar water chain structures in photosynthetic reaction centers (RCs), Cytochrome f, gramicidin, and bacteriorhodopsin, suggests that PGPase may conduct protons via proton wires.
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{{ABSTRACT_PUBMED_16838328}}
==About this Structure==
==About this Structure==
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[[Category: Structural genomic]]
[[Category: Structural genomic]]
[[Category: Tetramer]]
[[Category: Tetramer]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 16:02:38 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 02:55:57 2008''

Revision as of 23:55, 27 July 2008

Image:1y9i.png

Template:STRUCTURE 1y9i

Crystal structure of low temperature requirement C protein from Listeria monocytogenes

Template:ABSTRACT PUBMED 16838328

About this Structure

1Y9I is a Single protein structure of sequence from Listeria monocytogenes. Full crystallographic information is available from OCA.

Reference

Crystal structure of phosphatidylglycerophosphatase (PGPase), a putative membrane-bound lipid phosphatase, reveals a novel binuclear metal binding site and two "proton wires"., Kumaran D, Bonanno JB, Burley SK, Swaminathan S, Proteins. 2006 Sep 1;64(4):851-62. PMID:16838328

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