1i9a

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[[Image:1i9a.gif|left|200px]]
[[Image:1i9a.gif|left|200px]]
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{{Structure
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|PDB= 1i9a |SIZE=350|CAPTION= <scene name='initialview01'>1i9a</scene>, resolution 2.5&Aring;
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The line below this paragraph, containing "STRUCTURE_1i9a", creates the "Structure Box" on the page.
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|SITE=
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Isopentenyl-diphosphate_Delta-isomerase Isopentenyl-diphosphate Delta-isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.3.3.2 5.3.3.2] </span>
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|GENE=
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|DOMAIN=<span class='plainlinks'>[http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=PRK03759 PRK03759], [http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=cd02885 IPP_Isomerase]</span>
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{{STRUCTURE_1i9a| PDB=1i9a | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1i9a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1i9a OCA], [http://www.ebi.ac.uk/pdbsum/1i9a PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1i9a RCSB]</span>
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'''STRUCTURAL STUDIES OF CHOLESTEROL BIOSYNTHESIS: MEVALONATE 5-DIPHOSPHATE DECARBOXYLASE AND ISOPENTENYL DIPHOSPHATE ISOMERASE'''
'''STRUCTURAL STUDIES OF CHOLESTEROL BIOSYNTHESIS: MEVALONATE 5-DIPHOSPHATE DECARBOXYLASE AND ISOPENTENYL DIPHOSPHATE ISOMERASE'''
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[[Category: Sali, A.]]
[[Category: Sali, A.]]
[[Category: Studier, F W.]]
[[Category: Studier, F W.]]
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[[Category: alpha/beta protein]]
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[[Category: Alpha/beta protein]]
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[[Category: isomerase]]
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[[Category: Isomerase]]
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[[Category: mn2+]]
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[[Category: Mn2+]]
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[[Category: new york structural genomix research consortium]]
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[[Category: New york structural genomix research consortium]]
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[[Category: nysgxrc]]
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[[Category: Nysgxrc]]
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[[Category: protein structure initiative]]
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[[Category: Protein structure initiative]]
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[[Category: psi]]
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[[Category: Psi]]
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[[Category: structural genomic]]
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[[Category: Structural genomic]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 19:43:51 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:16:25 2008''
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Revision as of 16:43, 2 May 2008

Image:1i9a.gif

Template:STRUCTURE 1i9a

STRUCTURAL STUDIES OF CHOLESTEROL BIOSYNTHESIS: MEVALONATE 5-DIPHOSPHATE DECARBOXYLASE AND ISOPENTENYL DIPHOSPHATE ISOMERASE


Overview

X-ray structures of two enzymes in the sterol/isoprenoid biosynthesis pathway have been determined in a structural genomics pilot study. Mevalonate-5-diphosphate decarboxylase (MDD) is a single-domain alpha/beta protein that catalyzes the last of three sequential ATP-dependent reactions which convert mevalonate to isopentenyl diphosphate. Isopentenyl disphosphate isomerase (IDI) is an alpha/beta metalloenzyme that catalyzes interconversion of isopentenyl diphosphate and dimethylallyl diphosphate, which condense in the next step toward synthesis of sterols and a host of natural products. Homology modeling of related proteins and comparisons of the MDD and IDI structures with two other experimentally determined structures have shown that MDD is a member of the GHMP superfamily of small-molecule kinases and IDI is similar to the nudix hydrolases, which act on nucleotide diphosphatecontaining substrates. Structural models were produced for 379 proteins, encompassing a substantial fraction of both protein superfamilies. All three enzymes responsible for synthesis of isopentenyl diphosphate from mevalonate (mevalonate kinase, phosphomevalonate kinase, and MDD) share the same fold, catalyze phosphorylation of chemically similar substrates (MDD decarboxylation involves phosphorylation of mevalonate diphosphate), and seem to have evolved from a common ancestor. These structures and the structural models derived from them provide a framework for interpreting biochemical function and evolutionary relationships.

About this Structure

1I9A is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Structural genomics of enzymes involved in sterol/isoprenoid biosynthesis., Bonanno JB, Edo C, Eswar N, Pieper U, Romanowski MJ, Ilyin V, Gerchman SE, Kycia H, Studier FW, Sali A, Burley SK, Proc Natl Acad Sci U S A. 2001 Nov 6;98(23):12896-901. PMID:11698677 Page seeded by OCA on Fri May 2 19:43:51 2008

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