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1llb
From Proteopedia
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| - | [[Image:1llb.gif|left|200px]] | + | [[Image:1llb.gif|left|200px]] |
| - | + | ||
| - | '''Crystal Structure Of AmpC beta-Lactamase From E. Coli In Complex With ATMO-penicillin''' | + | {{Structure |
| + | |PDB= 1llb |SIZE=350|CAPTION= <scene name='initialview01'>1llb</scene>, resolution 1.72Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=PCN:2-{1-[2-(2-AMINO-THIAZOL-4-YL)-2-METHOXYIMINO-ACETYLAMINO]-2-OXO-ETHYL}-5,5-DIMETHYL-THIAZOLIDINE-4-CARBOXYLIC ACID'>PCN</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Beta-lactamase Beta-lactamase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.2.6 3.5.2.6] | ||
| + | |GENE= ampC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | ||
| + | }} | ||
| + | |||
| + | '''Crystal Structure Of AmpC beta-Lactamase From E. Coli In Complex With ATMO-penicillin''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1LLB is a [ | + | 1LLB is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LLB OCA]. |
==Reference== | ==Reference== | ||
| - | Using steric hindrance to design new inhibitors of class C beta-lactamases., Trehan I, Morandi F, Blaszczak LC, Shoichet BK, Chem Biol. 2002 Sep;9(9):971-80. PMID:[http:// | + | Using steric hindrance to design new inhibitors of class C beta-lactamases., Trehan I, Morandi F, Blaszczak LC, Shoichet BK, Chem Biol. 2002 Sep;9(9):971-80. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12323371 12323371] |
[[Category: Beta-lactamase]] | [[Category: Beta-lactamase]] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
| Line 24: | Line 33: | ||
[[Category: serine]] | [[Category: serine]] | ||
| - | ''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 12:32:12 2008'' |
Revision as of 10:32, 20 March 2008
| |||||||
| , resolution 1.72Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Gene: | ampC (Escherichia coli) | ||||||
| Activity: | Beta-lactamase, with EC number 3.5.2.6 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure Of AmpC beta-Lactamase From E. Coli In Complex With ATMO-penicillin
Overview
beta-lactamases confer resistance to beta-lactam antibiotics such as penicillins and cephalosporins. However, beta-lactams that form an acyl-intermediate with the enzyme but subsequently are hindered from forming a catalytically competent conformation seem to be inhibitors of beta-lactamases. This inhibition may be imparted by specific groups on the ubiquitous R(1) side chain of beta-lactams, such as the 2-amino-4-thiazolyl methoxyimino (ATMO) group common among third-generation cephalosporins. Using steric hindrance of deacylation as a design guide, penicillin and carbacephem substrates were converted into effective beta-lactamase inhibitors and antiresistance antibiotics. To investigate the structural bases of inhibition, the crystal structures of the acyl-adducts of the penicillin substrate amoxicillin and the new analogous inhibitor ATMO-penicillin were determined. ATMO-penicillin binds in a catalytically incompetent conformation resembling that adopted by third-generation cephalosporins, demonstrating the transferability of such sterically hindered groups in inhibitor design.
About this Structure
1LLB is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Using steric hindrance to design new inhibitors of class C beta-lactamases., Trehan I, Morandi F, Blaszczak LC, Shoichet BK, Chem Biol. 2002 Sep;9(9):971-80. PMID:12323371
Page seeded by OCA on Thu Mar 20 12:32:12 2008
