Evidence map›Paper›PMID 19535439›Full record

ArticleJournal of virology2009

Molecular characterization of clinical isolates of human immunodeficiency virus resistant to the protease inhibitor darunavir.

Klára Grantz Sasková, Milan Kozísek, Pavlína Rezácová, Jirí Brynda, Tatyana Yashina, Ron M Kagan, Jan Konvalinka

Abstract read
In one paragraph

Article in Journal of virology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
2.1field-weighted citation impact, top 14% 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

25 citing papers in PubMed, 48 citations in OpenAlex.

  1. Article
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  3. Viral proteases as therapeutic targets.Molecular aspects of medicine · 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

7 authors at 5 institutions in 2 countries.

Klára Grantz SaskováGilead Sciences and IOCB Research Center, Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, v.v.i., Flemingovo n. 2, 166 10 Prague 6, Czech Republic.
Milan Kozísek
Pavlína Rezácová
Jirí Brynda
Tatyana Yashina
Ron M Kagan
Jan Konvalinka
Czech Academy of Sciences, Institute of Organic Chemistry and Biochemistry · CZCharles University · CZCzech Academy of Sciences, Institute of Molecular Genetics · CZQuest Diagnostics (United States) · USSpecialty Materials (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Darunavir is the most recently approved human immunodeficiency virus (HIV) protease (PR) inhibitor (PI) and is active against many HIV type 1 PR variants resistant to earlier-generation PIs. Darunavir shows a high genetic barrier to resistance development, and virus strains with lower sensitivity to darunavir have a higher number of PI resistance-associated mutations than viruses resistant to other PIs. In this work, we have enzymologically and structurally characterized a number of highly mutated clinically derived PRs with high levels of phenotypic resistance to darunavir. With 18 to 21 amino acid residue changes, the PR variants studied in this work are the most highly mutated HIV PR species ever studied by means of enzyme kinetics and X-ray crystallography. The recombinant proteins showed major defects in substrate binding, while the substrate turnover was less affected. Remarkably, the overall catalytic efficiency of the recombinant PRs (5% that of the wild-type enzyme) is still sufficient to support polyprotein processing and particle maturation in the corresponding viruses. The X-ray structures of drug-resistant PRs complexed with darunavir suggest that the impaired inhibitor binding could be explained by change in the PR-inhibitor hydrogen bond pattern in the P2' binding pocket due to a substantial shift of the aminophenyl moiety of the inhibitor. Recombinant virus phenotypic characterization, enzyme kinetics, and X-ray structural analysis thus help to explain darunavir resistance development in HIV-positive patients.

Indexed as

Drug Resistance, ViralAmino Acid SequenceAmino Acid SubstitutionBinding SitesCrystallography, X-RayDarunavirDNA Mutational Analysisenv Gene Products, Human Immunodeficiency Virusgag Gene Products, Human Immunodeficiency VirusHIV-1HIV InfectionsHIV ProteaseHIV Protease InhibitorsHumansModels, MolecularMolecular Sequence DataDarunavirenv Gene Products, Human Immunodeficiency Virusgag Gene Products, Human Immunodeficiency VirusHIV ProteaseHIV Protease Inhibitorsp16 protease, Human immunodeficiency virus 1PolyproteinsSulfonamides

Identifiers

PMID19535439
PMCPMC2738195
OpenAlexW2150562573

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.