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6c39

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Revision as of 06:18, 2 January 2019

Apo crystal structure of wild-type S. aureus penicillin binding protein 4 (PBP4)

Structural highlights

6c39 is a 2 chain structure with sequence from "micrococcus_aureus"_(rosenbach_1884)_zopf_1885 "micrococcus aureus" (rosenbach 1884) zopf 1885. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Gene:	HMPREF3211_00659 ("Micrococcus aureus" (Rosenbach 1884) Zopf 1885)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Publication Abstract from PubMed

Methicillin-resistant Staphylococcus aureus (MRSA) causes serious community-acquired and nosocomial infections worldwide. MRSA strains are resistant to a variety of antibiotics, including the classic penicillin and cephalosporin classes of beta-lactams, making them intractable to treatment. Although beta-lactam resistance in MRSA has been ascribed to the acquisition and activity of penicillin-binding protein 2a (PBP2a, encoded by mecA), it has recently been observed that resistance can also be mediated by penicillin-binding protein 4 (PBP4). Previously, we have shown that broad-spectrum beta-lactam resistance can arise following serial passaging of a mecA-negative COL strain of S. aureus, creating the CRB strain. This strain has two missense mutations in pbp4 and a mutation in the pbp4 promoter, both of which play an instrumental role in beta-lactam resistance. To better understand PBP4's role in resistance, here we have characterized its kinetics and structure with clinically relevant beta-lactam antibiotics. We present the first crystallographic PBP4 structures of apo and acyl-enzyme intermediate forms complexed with three late-generation beta-lactam antibiotics: ceftobiprole, ceftaroline, and nafcillin. In parallel, we characterized the structural and kinetic effects of the PBP4 mutations present in the CRB strain. Localized within the transpeptidase active-site cleft, the two substitutions appear to have different effects depending on the drug. With ceftobiprole, the missense mutations impaired the KM value 150-fold, decreasing the proportion of inhibited PBP4. However, ceftaroline resistance appeared to be mediated by other factors, possibly including mutation of the pbp4 promoter. Our findings provide evidence that S. aureus CRB has at least two PBP4-mediated resistance mechanisms.

Structural and kinetic analysis of penicillin-binding protein 4 (PBP4)-mediated antibiotic resistance in Staphylococcus aureus.,Alexander JAN, Chatterjee SS, Hamilton SM, Eltis LD, Chambers HF, Strynadka NCJ J Biol Chem. 2018 Oct 26. pii: RA118.004952. doi: 10.1074/jbc.RA118.004952. PMID:30366985^[1]

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

References

↑ Alexander JAN, Chatterjee SS, Hamilton SM, Eltis LD, Chambers HF, Strynadka NCJ. Structural and kinetic analysis of penicillin-binding protein 4 (PBP4)-mediated antibiotic resistance in Staphylococcus aureus. J Biol Chem. 2018 Oct 26. pii: RA118.004952. doi: 10.1074/jbc.RA118.004952. PMID:30366985 doi:http://dx.doi.org/10.1074/jbc.RA118.004952

1 Structural highlights
2 Publication Abstract from PubMed
3 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6c39"

Categories: Alexander, J A.N | Strynadka, N C.J | Hydrolase | Penicillin binding protein

@@ Line 3: / Line 3: @@
 <StructureSection load='6c39' size='340' side='right' caption='[[6c39]], [[Resolution|resolution]] 1.69&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6c39]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6C39 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6C39 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6c39]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"micrococcus_aureus"_(rosenbach_1884)_zopf_1885 "micrococcus aureus" (rosenbach 1884) zopf 1885]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6C39 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6C39 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HMPREF3211_00659 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1280 "Micrococcus aureus" (Rosenbach 1884) Zopf 1885])</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=6c39 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6c39 OCA], [http://pdbe.org/6c39 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6c39 RCSB], [http://www.ebi.ac.uk/pdbsum/6c39 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6c39 ProSAT]</span></td></tr>
 </table>

6c39

From Proteopedia

Revision as of 06:18, 2 January 2019

Apo crystal structure of wild-type S. aureus penicillin binding protein 4 (PBP4)

Structural highlights

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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