4lip
From Proteopedia
| Line 4: | Line 4: | ||
|PDB= 4lip |SIZE=350|CAPTION= <scene name='initialview01'>4lip</scene>, resolution 1.75Å | |PDB= 4lip |SIZE=350|CAPTION= <scene name='initialview01'>4lip</scene>, resolution 1.75Å | ||
|SITE= <scene name='pdbsite=ACD:Active+Site'>ACD</scene>, <scene name='pdbsite=ACE:Active+Site'>ACE</scene>, <scene name='pdbsite=OXD:Oxyanion+Hole'>OXD</scene> and <scene name='pdbsite=OXE:Oxyanion+Hole'>OXE</scene> | |SITE= <scene name='pdbsite=ACD:Active+Site'>ACD</scene>, <scene name='pdbsite=ACE:Active+Site'>ACE</scene>, <scene name='pdbsite=OXD:Oxyanion+Hole'>OXD</scene> and <scene name='pdbsite=OXE:Oxyanion+Hole'>OXE</scene> | ||
| - | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene> | + | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CCP:BUTYLPHOSPHONATE'>CCP</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Triacylglycerol_lipase Triacylglycerol lipase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.3 3.1.1.3] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Triacylglycerol_lipase Triacylglycerol lipase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.1.3 3.1.1.3] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4lip FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lip OCA], [http://www.ebi.ac.uk/pdbsum/4lip PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=4lip RCSB]</span> | ||
}} | }} | ||
| Line 25: | Line 28: | ||
[[Category: Dijkstra, B W.]] | [[Category: Dijkstra, B W.]] | ||
[[Category: Lang, D A.]] | [[Category: Lang, D A.]] | ||
| - | [[Category: CA]] | ||
| - | [[Category: CCP]] | ||
[[Category: covalent intermediate]] | [[Category: covalent intermediate]] | ||
[[Category: enantioselectivity]] | [[Category: enantioselectivity]] | ||
| Line 34: | Line 35: | ||
[[Category: triglyceride analogue]] | [[Category: triglyceride analogue]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 05:39:19 2008'' |
Revision as of 02:39, 31 March 2008
| |||||||
| , resolution 1.75Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | , , and | ||||||
| Ligands: | , | ||||||
| Activity: | Triacylglycerol lipase, with EC number 3.1.1.3 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
PSEUDOMONAS LIPASE COMPLEXED WITH RC-(RP, SP)-DIBUTYLCARBAMOYLGLYCERO-3-O-BUTYLPHOSPHONATE
Overview
To investigate the enantioselectivity of Pseudomonas cepacia lipase, inhibition studies were performed with Sc- and Rc-(Rp,Sp)-1,2-dialkylcarbamoylglycero-3-O-p-nitrophenyl alkylphosphonates of different alkyl chain lengths. P. cepacia lipase was most rapidly inactivated by Rc-(Rp,Sp)-1,2-dioctylcarbamoylglycero-3-O-p-nitrophenyl octylphosphonate (Rc-trioctyl) with an inactivation half-time of 75 min, while that for the Sc-(Rp,Sp)-1,2-dioctylcarbamoylglycero-3-O-p-nitrophenyl octyl-phosphonate (Sc-trioctyl) compound was 530 min. X-ray structures were obtained of P. cepacia lipase after reaction with Rc-trioctyl to 0.29-nm resolution at pH 4 and covalently modified with Rc-(Rp,Sp)-1,2-dibutylcarbamoylglycero-3-O-p-nitrophenyl butyl-phosphonate (Rc-tributyl) to 0.175-nm resolution at pH 8.5. The three-dimensional structures reveal that both triacylglycerol analogues had reacted with the active-site Ser87, forming a covalent complex. The bound phosphorus atom shows the same chirality (Sp) in both complexes despite the use of a racemic (Rp,Sp) mixture at the phosphorus atom of the triacylglycerol analogues. In the structure of Rc-tributyl-complexed P. cepacia lipase, the diacylglycerol moiety has been lost due to an aging reaction, and only the butyl phosphonate remains visible in the electron density. In the Rc-trioctyl complex the complete inhibitor is clearly defined; it adopts a bent tuning fork conformation. Unambiguously, four binding pockets for the triacylglycerol could be detected: an oxyanion hole and three pockets which accommodate the sn-1, sn-2, and sn-3 fatty acid chains. Van der Waals' interactions are the main forces that keep the radyl groups of the triacylglycerol analogue in position and, in addition, a hydrogen bond to the carbonyl oxygen of the sn-2 chain contributes to fixing the position of the inhibitor.
About this Structure
4LIP is a Single protein structure of sequence from Burkholderia cepacia. Full crystallographic information is available from OCA.
Reference
Structural basis of the chiral selectivity of Pseudomonas cepacia lipase., Lang DA, Mannesse ML, de Haas GH, Verheij HM, Dijkstra BW, Eur J Biochem. 1998 Jun 1;254(2):333-40. PMID:9660188
Page seeded by OCA on Mon Mar 31 05:39:19 2008
