Evidence map›Paper›PMID 20955714›Full record

ArticleJournal of molecular biology2010

Multiple global suppressors of protein stability defects facilitate the evolution of extended-spectrum TEM β-lactamases.

Nicholas G Brown, Jeanine M Pennington, Wanzhi Huang, Tulin Ayvaz, Timothy Palzkill

Abstract read
In one paragraph

Article in Journal of molecular biology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed
1.9field-weighted citation impact, top 16% 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

50 citing papers in PubMed, 85 citations in OpenAlex.

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  11. Adaptive evolvability through direct selection instead of indirect, second-order selection.Journal of experimental zoology. Part B, Molecular and developmental evolution · 2022
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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 1 institution in 1 country.

Nicholas G BrownDepartment of Biochemistry and Molecular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
Jeanine M Pennington
Wanzhi Huang
Tulin Ayvaz
Timothy Palzkill
Baylor College of Medicine · US

Funding

BETA-LACTAMASE MUTATIONS IN ANTIBIOTIC RESISTANCER01AI032956 · NIAID · BAYLOR COLLEGE OF MEDICINE · PI Timothy Palzkill · 1992 to 2026
$6.5M
Beta Lactamase Mutations in Antibiotic ResistanceR37AI032956 · NIAID · BAYLOR COLLEGE OF MEDICINE · PI PALZKILL, TIMOTHY · 2001 to 2010
$3.3M
Training in Pharmacoinformatics(RMI)T90DK070109 · NIDDK · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI STANCEL, GEORGE M. · 2004 to 2008
$1.6M
Training in Biomedical Discovery from Large Scale Data SetsT90DA022885 · NIDA · BAYLOR COLLEGE OF MEDICINE · PI PALZKILL, TIMOTHY · 2006 to 2009
$635k
Beta Lactamase Mutations in Antibiotic ResistanceR56AI032956 · NIAID · BAYLOR COLLEGE OF MEDICINE · PI PALZKILL, TIMOTHY · 2016 to 2016
$394k
NIAID NIH HHS AI32956NIAID NIH HHS R01 AI032956NIAID NIH HHS R37 AI032956NIAID NIH HHS R56 AI032956NIDA NIH HHS 1 T90 DA022885-04NIDA NIH HHS T90 DA022885NIDDK NIH HHS T90 DK070109NIDDK NIH HHS T90 DK070109-05
6 · The paper itself

Abstract

The introduction of extended-spectrum cephalosporins and β-lactamase inhibitors has driven the evolution of extended-spectrum β-lactamases (ESBLs) that possess the ability to hydrolyze these drugs. The evolved TEM ESBLs from clinical isolates of bacteria often contain substitutions that occur in the active site and alter the catalytic properties of the enzyme to provide an increased hydrolysis of extended-spectrum cephalosporins or an increased resistance to inhibitors. These active-site substitutions often result in a cost in the form of reduced enzyme stability. The evolution of TEM ESBLs is facilitated by mutations that act as global suppressors of protein stability defects in that they allow the enzyme to absorb multiple amino acid changes despite incremental losses in stability associated with the substitutions. The best-studied example is the M182T substitution, which corrects protein stability defects and is commonly found in TEM ESBLs or inhibitor-resistant variants from clinical isolates. In this study, a genetic selection for second-site mutations that could partially restore function to a severely destabilized primary mutant enabled the identification of A184V, T265M, R275Q, and N276D, which are known to occur in TEM ESBLs from clinical isolates, as suppressors of TEM-1 protein stability defects. Further characterization demonstrated that these substitutions increased the thermal stability of TEM-1 and were able to correct the stability defects of two different sets of destabilizing mutations. The acquisition of compensatory global suppressors of stability costs associated with active-site mutations may be a common mechanism for the evolution of novel protein function.

Indexed as

Evolution, MolecularMutation, MissenseSuppression, GeneticAmino Acid SubstitutionAmpicillinAnti-Bacterial Agentsbeta-LactamasesEnzyme StabilityEscherichia coliModels, MolecularProtein StabilityProtein Structure, TertiaryTemperatureAmpicillinAnti-Bacterial Agentsbeta-Lactamasesbeta-lactamase TEM-1

Identifiers

PMID20955714
PMCPMC3032993
OpenAlexW2005455051

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

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.