This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

4nb1

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 21:53, 5 August 2016

Crystal Structure of FosB from Staphylococcus aureus at 1.80 Angstrom Resolution with L-Cysteine-Cys9 Disulfide

Structural highlights

4nb1 is a 2 chain structure with sequence from Staan. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	4nay, 4naz, 4nb0, 4nb2
Gene:	fosB, SA2124 (STAAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[FOSB_STAAN] Metallothiol transferase which confers resistance to fosfomycin by catalyzing the addition of a thiol cofactor to fosfomycin. L-cysteine is probably the physiological thiol donor (By similarity).

Publication Abstract from PubMed

The Gram-positive pathogen Staphylococcus aureus is a leading cause of global morbidity and mortality. Like many multi-drug-resistant organisms, S. aureus contains antibiotic-modifying enzymes that facilitate resistance to a multitude of antimicrobial compounds. FosB is a Mn(2+)-dependent fosfomycin-inactivating enzyme found in S. aureus that catalyzes nucleophilic addition of either l-cysteine (l-Cys) or bacillithiol (BSH) to the antibiotic, resulting in a modified compound with no bactericidal properties. The three-dimensional X-ray crystal structure of FosB from S. aureus (FosB(Sa)) has been determined to a resolution of 1.15 A. Cocrystallization of FosB(Sa) with either l-Cys or BSH results in a disulfide bond between the exogenous thiol and the active site Cys9 of the enzyme. An analysis of the structures suggests that a highly conserved loop region of the FosB enzymes must change conformation to bind fosfomycin. While two crystals of FosB(Sa) contain Zn(2+) in the active site, kinetic analyses of FosB(Sa) indicated that the enzyme is inhibited by Zn(2+) for l-Cys transferase activity and only marginally active for BSH transferase activity. Fosfomycin-treated disk diffusion assays involving S. aureus Newman and the USA300 JE2 methicillin-resistant S. aureus demonstrate a marked increase in the sensitivity of the organism to the antibiotic in either the BSH or FosB null strains, indicating that both are required for survival of the organism in the presence of the antibiotic. This work identifies FosB as a primary fosfomycin-modifying pathway of S. aureus and establishes the enzyme as a potential therapeutic target for increased efficacy of fosfomycin against the pathogen.

Structure and Function of the Genomically Encoded Fosfomycin Resistance Enzyme, FosB, from Staphylococcus aureus.,Thompson MK, Keithly ME, Goodman MC, Hammer ND, Cook PD, Jagessar KL, Harp J, Skaar EP, Armstrong RN Biochemistry. 2014 Feb 4;53(4):755-65. doi: 10.1021/bi4015852. Epub 2014 Jan 21. PMID:24447055^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Thompson MK, Keithly ME, Goodman MC, Hammer ND, Cook PD, Jagessar KL, Harp J, Skaar EP, Armstrong RN. Structure and Function of the Genomically Encoded Fosfomycin Resistance Enzyme, FosB, from Staphylococcus aureus. Biochemistry. 2014 Feb 4;53(4):755-65. doi: 10.1021/bi4015852. Epub 2014 Jan 21. PMID:24447055 doi:http://dx.doi.org/10.1021/bi4015852

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4nb1"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of FosB from Staphylococcus aureus at 1.80 Angstrom Resolution with L-Cysteine-Cys9 Disulfide==
 <StructureSection load='4nb1' size='340' side='right' caption='[[4nb1]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4nay|4nay]], [[4naz|4naz]], [[4nb0|4nb0]], [[4nb2|4nb2]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">fosB, SA2124 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=158879 STAAN])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4nb1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4nb1 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4nb1 RCSB], [http://www.ebi.ac.uk/pdbsum/4nb1 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4nb1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4nb1 OCA], [http://pdbe.org/4nb1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4nb1 RCSB], [http://www.ebi.ac.uk/pdbsum/4nb1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4nb1 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 19: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4nb1" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Metallothiol transferase FosB|Metallothiol transferase FosB]]
 == References ==
 <references/>

4nb1

From Proteopedia

Revision as of 21:53, 5 August 2016

Crystal Structure of FosB from Staphylococcus aureus at 1.80 Angstrom Resolution with L-Cysteine-Cys9 Disulfide

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox