2uuv

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[[Image:2uuv.gif|left|200px]]
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{{Seed}}
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{{STRUCTURE_2uuv| PDB=2uuv | SCENE= }}
{{STRUCTURE_2uuv| PDB=2uuv | SCENE= }}
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'''ALKYLDIHYDROXYACETONEPHOSPHATE SYNTHASE IN P1'''
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===ALKYLDIHYDROXYACETONEPHOSPHATE SYNTHASE IN P1===
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==Overview==
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Ether phospholipids are essential constituents of eukaryotic cell membranes. Rhizomelic chondrodysplasia punctata type 3 is a severe peroxisomal disorder caused by inborn deficiency of alkyldihydroxyacetonephosphate synthase (ADPS). The enzyme carries out the most characteristic step in ether phospholipid biosynthesis: formation of the ether bond. The crystal structure of ADPS from Dictyostelium discoideum shows a fatty-alcohol molecule bound in a narrow hydrophobic tunnel, specific for aliphatic chains of 16 carbons. Access to the tunnel is controlled by a flexible loop and a gating helix at the protein-membrane interface. Structural and mutagenesis investigations identify a cluster of hydrophilic catalytic residues, including an essential tyrosine, possibly involved in substrate proton abstraction, and the arginine that is mutated in ADPS-deficient patients. We propose that ether bond formation might be orchestrated through a covalent imine intermediate with the flavin, accounting for the noncanonical employment of a flavin cofactor in a nonredox reaction.
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{{ABSTRACT_PUBMED_17562315}}
==About this Structure==
==About this Structure==
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[[Category: Rhizomelic chondrodysplasia punctata]]
[[Category: Rhizomelic chondrodysplasia punctata]]
[[Category: Transferase]]
[[Category: Transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 17:31:48 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 17:35:53 2008''

Revision as of 14:35, 28 July 2008

Image:2uuv.png

Template:STRUCTURE 2uuv

ALKYLDIHYDROXYACETONEPHOSPHATE SYNTHASE IN P1

Template:ABSTRACT PUBMED 17562315

About this Structure

2UUV is a Single protein structure of sequence from Dictyostelium discoideum. Full crystallographic information is available from OCA.

Reference

The crucial step in ether phospholipid biosynthesis: structural basis of a noncanonical reaction associated with a peroxisomal disorder., Razeto A, Mattiroli F, Carpanelli E, Aliverti A, Pandini V, Coda A, Mattevi A, Structure. 2007 Jun;15(6):683-92. PMID:17562315

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