1kr3

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
[[Image:1kr3.jpg|left|200px]]
[[Image:1kr3.jpg|left|200px]]
-
{{Structure
+
<!--
-
|PDB= 1kr3 |SIZE=350|CAPTION= <scene name='initialview01'>1kr3</scene>, resolution 2.50&Aring;
+
The line below this paragraph, containing "STRUCTURE_1kr3", creates the "Structure Box" on the page.
-
|SITE=
+
You may change the PDB parameter (which sets the PDB file loaded into the applet)
-
|LIGAND= <scene name='pdbligand=113:7,8-DIHYDROXY-1-METHOXY-3-METHYL-10-OXO-4,10-DIHYDRO-1H,3H-PYRANO[4,3-B]CHROMENE-9-CARBOXYLIC+ACID'>113</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene>
+
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
-
|ACTIVITY= <span class='plainlinks'>[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] </span>
+
or leave the SCENE parameter empty for the default display.
-
|GENE= CfiA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=817 Bacteroides fragilis])
+
-->
-
|DOMAIN=
+
{{STRUCTURE_1kr3| PDB=1kr3 | SCENE= }}
-
|RELATEDENTRY=[[1znb|1ZNB]], [[1dd6|1DD6]]
+
-
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kr3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kr3 OCA], [http://www.ebi.ac.uk/pdbsum/1kr3 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1kr3 RCSB]</span>
+
-
}}
+
'''Crystal Structure of the Metallo beta-Lactamase from Bacteroides fragilis (CfiA) in Complex with the Tricyclic Inhibitor SB-236050.'''
'''Crystal Structure of the Metallo beta-Lactamase from Bacteroides fragilis (CfiA) in Complex with the Tricyclic Inhibitor SB-236050.'''
Line 43: Line 40:
[[Category: Rivera-Sagredo, A.]]
[[Category: Rivera-Sagredo, A.]]
[[Category: Tew, D.]]
[[Category: Tew, D.]]
-
[[Category: beta sandwich]]
+
[[Category: Beta sandwich]]
-
[[Category: beta-lactamase]]
+
[[Category: Beta-lactamase]]
-
[[Category: metallo]]
+
[[Category: Metallo]]
-
[[Category: protein-inhibitor complex]]
+
[[Category: Protein-inhibitor complex]]
-
 
+
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 23:04:18 2008''
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:52:26 2008''
+

Revision as of 20:04, 2 May 2008

Image:1kr3.jpg

Template:STRUCTURE 1kr3

Crystal Structure of the Metallo beta-Lactamase from Bacteroides fragilis (CfiA) in Complex with the Tricyclic Inhibitor SB-236050.


Overview

This work describes the discovery and characterization of a novel series of tricyclic natural product-derived metallo-beta-lactamase inhibitors. Natural product screening of the Bacillus cereus II enzyme identified an extract from a strain of Chaetomium funicola with inhibitory activity against metallo-beta-lactamases. SB236050, SB238569, and SB236049 were successfully extracted and purified from this extract. The most active of these compounds was SB238569, which possessed K(i) values of 79, 17, and 3.4 microM for the Bacillus cereus II, Pseudomonas aeruginosa IMP-1, and Bacteroides fragilis CfiA metallo-beta-lactamases, respectively, yet none of the compounds exhibited any inhibitory activity against the Stenotrophomonas maltophilia L-1 metallo-beta-lactamase (50% inhibitory concentration > 1,000 microM). The lack of activity against angiotensin-converting enzyme and serine beta-lactamases demonstrated the selective nature of these compounds. The crystal structure of SB236050 complexed in the active site of CfiA has been obtained to a resolution of 2.5 A. SB236050 exhibits key polar interactions with Lys184, Asn193, and His162 and a stacking interaction with the indole ring of Trp49 in the flap, which is in the closed conformation over the active site groove. SB236050 and SB238569 also demonstrate good antibacterial synergy with meropenem. Eight micrograms of SB236050 per ml gave rise to an eightfold drop in the MIC of meropenem for two clinical isolates of B. fragilis producing CfiA, making these strains sensitive to meropenem (MIC < or = 4 microg/ml). Consequently, this series of metallo-beta-lactamase inhibitors exhibit the most promising antibacterial synergy activity so far observed against organisms producing metallo-beta-lactamases.

About this Structure

1KR3 is a Single protein structure of sequence from Bacteroides fragilis. Full crystallographic information is available from OCA.

Reference

Identification of a series of tricyclic natural products as potent broad-spectrum inhibitors of metallo-beta-lactamases., Payne DJ, Hueso-Rodriguez JA, Boyd H, Concha NO, Janson CA, Gilpin M, Bateson JH, Cheever C, Niconovich NL, Pearson S, Rittenhouse S, Tew D, Diez E, Perez P, De La Fuente J, Rees M, Rivera-Sagredo A, Antimicrob Agents Chemother. 2002 Jun;46(6):1880-6. PMID:12019104 Page seeded by OCA on Fri May 2 23:04:18 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1kr3"
Personal tools