Evidence map›Paper›PMID 15247345›Full record

ArticleNucleic acids research2004

A phage display selection of engrailed homeodomain mutants and the importance of residue Q50.

Matthew D Simon, Ken Sato, Gregory A Weiss, Kevan M Shokat

Abstract read
In one paragraph

Article in Nucleic acids research, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
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

9 citing papers in PubMed.

  1. Article
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  8. Review
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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

4 authors.

Matthew D SimonDepartment of Chemistry, University of California, Berkeley, CA 94720, USA.
Ken Sato
Gregory A Weiss
Kevan M Shokat

Funding

Using chemical genetics to investigate mechanisms of anesthetic actionR01EB001987 · NIBIB · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI SHOKAT, KEVAN M. · 2003 to 2012
$2.9M
NIBIB NIH HHS R01 EB-001987NIBIB NIH HHS R01 EB001987
6 · The paper itself

Abstract

Mutants of engrailed homeodomain (HD) that retain DNA-binding activity were isolated using a phage display selection. This selection was used to enrich for active DNA-binding clones from a complex library consisting of over a billion members. A more focused library of mutant homeodomains consisting of all possible amino acid combinations at two DNA-contacting residues (I47 and Q50) was constructed and screened for members capable of binding tightly and specifically to the engrailed consensus sequence, TAATTA. The isolated mutants largely recapitulated the distribution of amino acids found at these positions in natural homeodomains thus validating the in vitro selection conditions. In particular, the unequivocal advantage enjoyed by glutamine at residue 50 is surprising in light of reports that minimize the importance of this residue. Here, the subtle contributions of residue Q50 are demonstrated to play a functionally important role in specific recognition of DNA. These results highlight the complex subtlety of protein-DNA interactions, underscoring the value of the first reported in vitro selection of a homeodomain.

Indexed as

Binding SitesConsensus SequenceGlutamineHomeodomain ProteinsModels, MolecularMutagenesisMutationPeptide LibraryProtein EngineeringRecombinant Fusion ProteinsViral ProteinsGlutamineHomeodomain ProteinsPeptide LibraryRecombinant Fusion ProteinsViral Proteins

Identifiers

PMID15247345
PMCPMC484177

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.