1lan
From Proteopedia
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|PDB= 1lan |SIZE=350|CAPTION= <scene name='initialview01'>1lan</scene>, resolution 1.9Å | |PDB= 1lan |SIZE=350|CAPTION= <scene name='initialview01'>1lan</scene>, resolution 1.9Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=LEU:LEUCINE'>LEU</scene>, <scene name='pdbligand=MRD:(4R)-2-METHYLPENTANE-2,4-DIOL'>MRD</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Leucyl_aminopeptidase Leucyl aminopeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.11.1 3.4.11.1] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Leucyl_aminopeptidase Leucyl aminopeptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.11.1 3.4.11.1] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1lan FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lan OCA], [http://www.ebi.ac.uk/pdbsum/1lan PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1lan RCSB]</span> | ||
}} | }} | ||
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[[Category: Lipscomb, W N.]] | [[Category: Lipscomb, W N.]] | ||
[[Category: Straeter, N.]] | [[Category: Straeter, N.]] | ||
| - | [[Category: LEU]] | ||
| - | [[Category: MRD]] | ||
| - | [[Category: ZN]] | ||
[[Category: aminopeptidase]] | [[Category: aminopeptidase]] | ||
[[Category: exopeptidase]] | [[Category: exopeptidase]] | ||
[[Category: metallopeptidase]] | [[Category: metallopeptidase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:00:25 2008'' |
Revision as of 19:00, 30 March 2008
| |||||||
| , resolution 1.9Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , | ||||||
| Activity: | Leucyl aminopeptidase, with EC number 3.4.11.1 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
LEUCINE AMINOPEPTIDASE COMPLEX WITH L-LEUCINAL
Overview
The three-dimensional structures of bovine lens leucine aminopeptidase (blLAP) complexed with L-leucinal and of the unliganded enzyme have been determined at crystallographic resolutions of 1.9 and 1.6 A, respectively. Leucinal binds as a hydrated gem-diol to the active site of b1LAP), resembling the presumed gem-diolated intermediate in the catalytic pathway. One hydroxyl group bridges the two active site metal ions, and the other OH group is coordinated to Zn1. The high-resolution structure of the unliganded enzyme reveals one metal-bound water ligand, which is bridging both zinc ions. Together, these structures support a mechanism in which the bridging water ligand is the attacking hydroxide ion nucleophile. The gem-diolate intermediate is probably stabilized by four coordinating bonds to the dizinc center and by interaction with Lys-262 and Arg-336. In the mechanism, Lys-262 polarizes the peptide carbonyl group, which is also coordinated to Zn1. The Arg-336 side chain interacts with the substrate and the gem-diolate intermediate via water molecules. Near Arg-336 in the b1LAP-leucinal structure, an unusually short hydrogen bond is found between two active site water molecules.
About this Structure
1LAN is a Single protein structure of sequence from Bos taurus. Full crystallographic information is available from OCA.
Reference
Two-metal ion mechanism of bovine lens leucine aminopeptidase: active site solvent structure and binding mode of L-leucinal, a gem-diolate transition state analogue, by X-ray crystallography., Strater N, Lipscomb WN, Biochemistry. 1995 Nov 14;34(45):14792-800. PMID:7578088
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