ArticleJournal of structural biology2021
Crystal structure of the anti-CRISPR repressor Aca2.
Article in Journal of structural biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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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.
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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.
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Who cites it
7 citing papers in PubMed, 11 citations in OpenAlex.
- Functional characterization of a type I-F1 CRISPR-cas system from the clinical isolate Shewanella xiamenensis Sh95 reveals constitutive activity and plasmid-curing capability.Scientific reports · 2026Article
- Regulation of anti-CRISPR operons by structurally distinct families of Aca proteins.Communications biology · 2025Article
- Article
- AcaFinder: Genome Mining for Anti-CRISPR-Associated Genes.mSystems · 2022Article
- Molecular basis of dual anti-CRISPR and auto-regulatory functions of AcrIF24.Nucleic acids research · 2022Article
- Molecular basis of anti-CRISPR operon repression by Aca10.Nucleic acids research · 2022Article
- Crystal structure of the BREX phage defence protein BrxA.Current research in structural biology · 2022Article
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Bacteria use adaptive CRISPR-Cas immune mechanisms to protect from invasion by bacteriophages and other mobile genetic elements. In response, bacteriophages and mobile genetic elements have co-evolved anti-CRISPR proteins to inhibit the bacterial defense. We and others have previously shown that anti-CRISPR associated (Aca) proteins can regulate this anti-CRISPR counter-attack. Here, we report the first structure of an Aca protein, the Aca2 DNA-binding transcriptional autorepressor from Pectobacterium carotovorum bacteriophage ZF40, determined to 1.34 Å. Aca2 presents a conserved N-terminal helix-turn-helix DNA-binding domain and a previously uncharacterized C-terminal dimerization domain. Dimerization positions the Aca2 recognition helices for insertion into the major grooves of target DNA, supporting its role in regulating anti-CRISPRs. Furthermore, database comparisons identified uncharacterized Aca2 structural homologs in pathogenic bacteria, suggesting that Aca2 represents the first characterized member of a more widespread family of transcriptional regulators.
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Registered trials
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.