Evidence map›Paper›PMID 32778546›Full record

ArticleAntimicrobial agents and chemotherapy2020

Structural Basis and Binding Kinetics of Vaborbactam in Class A β-Lactamase Inhibition.

Orville A Pemberton, Ruslan Tsivkovski, Maxim Totrov, Olga Lomovskaya, Yu Chen

Open access · greenAbstract read
In one paragraph

Article in Antimicrobial agents and chemotherapy, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
0.6field-weighted citation impact, top 42% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 25 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 1 country.

Orville A PembertonDepartment of Molecular Medicine, University of South Florida Morsani College of Medicine, Tampa, Florida, USA.ORCID 0000-0003-1740-6085
Ruslan TsivkovskiQpex Biopharma, Inc., San Diego, California, USA.
Maxim TotrovMolsoft L.L.C., San Diego, California, USA.
Olga LomovskayaQpex Biopharma, Inc., San Diego, California, USA olomovskaya@qpexbio.com ychen1@usf.edu.
Yu ChenDepartment of Molecular Medicine, University of South Florida Morsani College of Medicine, Tampa, Florida, USA olomovskaya@qpexbio.com ychen1@usf.edu.ORCID 0000-0002-5115-3600
Mapp Biopharmaceutical (United States) · USUniversity of South Florida · USMolsoft (United States) · US

Funding

Evolution and inhibition of beta-lactamase activity in antibiotic resistanceR01AI103158 · NIAID · UNIVERSITY OF SOUTH FLORIDA · PI CHEN, YU · 2013 to 2017
$2.0M
NIAID NIH HHS R01 AI103158
6 · The paper itself

Abstract

Class A β-lactamases are a major cause of β-lactam resistance in Gram-negative bacteria. The recently FDA-approved cyclic boronate vaborbactam is a reversible covalent inhibitor of class A β-lactamases, including CTX-M extended-spectrum β-lactamase and KPC carbapenemase, both frequently observed in the clinic. Intriguingly, vaborbactam displayed different binding kinetics and cell-based activity for these two enzymes, despite their similarity. A 1.0-Å crystal structure of CTX-M-14 demonstrated that two catalytic residues, K73 and E166, are positively charged and neutral, respectively. Meanwhile, a 1.25-Å crystal structure of KPC-2 revealed a more compact binding mode of vaborbactam versus CTX-M-14, as well as alternative conformations of W105. Together with kinetic analysis of W105 mutants, the structures demonstrate the influence of this residue and the unusual conformation of the β3 strand on the inactivation rate, as well as the stability of the reversible covalent bond with S70. Furthermore, studies of KPC-2 S130G mutant shed light on the different impacts of S130 in the binding of vaborbactam versus avibactam, another recently approved β-lactamase inhibitor. Taken together, these new data provide valuable insights into the inhibition mechanism of vaborbactam and future development of cyclic boronate inhibitors.

Indexed as

Anti-Bacterial Agentsbeta-Lactamasesbeta-Lactamase InhibitorsBoronic AcidsKineticsAnti-Bacterial Agentsbeta-Lactamase Inhibitorsbeta-LactamasesBoronic Acidsvaborbactambeta-lactamasesbeta-lactamscarbapenemasecyclic boronic acidvaborbactam

Identifiers

PMID32778546
PMCPMC7508572
OpenAlexW3048688177

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.