2icj
From Proteopedia
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| - | [[Image:2icj.jpg|left|200px]] | + | [[Image:2icj.jpg|left|200px]] |
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| - | '''The crystal structure of human isopentenyl diphophate isomerase''' | + | {{Structure |
| + | |PDB= 2icj |SIZE=350|CAPTION= <scene name='initialview01'>2icj</scene>, resolution 1.7Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene> and <scene name='pdbligand=SO4:SULFATE ION'>SO4</scene> | ||
| + | |ACTIVITY= [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] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''The crystal structure of human isopentenyl diphophate isomerase''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 2ICJ is a [ | + | 2ICJ 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=2ICJ OCA]. |
==Reference== | ==Reference== | ||
| - | The crystal structure of human isopentenyl diphosphate isomerase at 1.7 A resolution reveals its catalytic mechanism in isoprenoid biosynthesis., Zheng W, Sun F, Bartlam M, Li X, Li R, Rao Z, J Mol Biol. 2007 Mar 9;366(5):1447-58. Epub 2006 Dec 24. PMID:[http:// | + | The crystal structure of human isopentenyl diphosphate isomerase at 1.7 A resolution reveals its catalytic mechanism in isoprenoid biosynthesis., Zheng W, Sun F, Bartlam M, Li X, Li R, Rao Z, J Mol Biol. 2007 Mar 9;366(5):1447-58. Epub 2006 Dec 24. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17250851 17250851] |
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Isopentenyl-diphosphate Delta-isomerase]] | [[Category: Isopentenyl-diphosphate Delta-isomerase]] | ||
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[[Category: human isopentenyl diphophate isomerase]] | [[Category: human isopentenyl diphophate isomerase]] | ||
| - | ''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 17:27:53 2008'' |
Revision as of 15:27, 20 March 2008
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| , resolution 1.7Å | |||||||
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| Ligands: | and | ||||||
| Activity: | Isopentenyl-diphosphate Delta-isomerase, with EC number 5.3.3.2 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
The crystal structure of human isopentenyl diphophate isomerase
Overview
Isopentenyl diphosphate isomerase catalyses a crucial activation step in the biosynthesis of isoprenoids, one of the most ancient and diverse classes of natural products. This enzyme is responsible for an unusual isomerization of the inactive carbon-carbon double bond of isopentenyl diphosphate (IPP) to create its electrophilic allylic isomer dimethylallyl diphosphate (DMAPP). Here we report the crystal structure of human IPP isomerase at 1.7 A resolution and the complex structure with its native substrate at 1.9 A resolution. These structures reveal a mechanism wherein interconversion is catalyzed by a stereoselective antarafacial [1.3] transposition of a proton involving the indispensable residues Cys87, Glu149, Trp197 and Tyr137. A newly identified alternative conformation of Cys87 driven by Trp197 and the selectivity of different metal ions located in the active site provide further insight into the catalytic mechanism. Comparison with Escherichia coli IPP isomerase reveals a novel substrate entrance in human IPP isomerase.
About this Structure
2ICJ is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
The crystal structure of human isopentenyl diphosphate isomerase at 1.7 A resolution reveals its catalytic mechanism in isoprenoid biosynthesis., Zheng W, Sun F, Bartlam M, Li X, Li R, Rao Z, J Mol Biol. 2007 Mar 9;366(5):1447-58. Epub 2006 Dec 24. PMID:17250851
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