Evidence map›Paper›PMID 8385611›Full record

ArticleThe EMBO journal1993

The probable arrangement of the helices in G protein-coupled receptors.

J M Baldwin

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in The EMBO journal, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 153 papers.

0numbers the graph read from it
0cells of the map it votes in
153citing papers in PubMed
36.8field-weighted citation impact, top 1% 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

153 citing papers in PubMed, 978 citations in OpenAlex.

  1. Review
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  6. A Novel HomozygousJournal of the Endocrine Society · 2022
    Article
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  8. Structural aspects of rod opsin and their implication in genetic diseases.Pflugers Archiv : European journal of physiology · 2021
    Review
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93 more citing papers are in PubMed but not listed here.

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

1 author at 1 institution in 1 country.

J M BaldwinMRC Laboratory of Molecular Biology, Cambridge, UK.
MRC Laboratory of Molecular Biology · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

G protein-coupled receptors form a large family of integral membrane proteins whose amino acid sequences have seven hydrophobic segments containing distinctive sequence patterns. Rhodopsin, a member of the family, is known to have transmembrane alpha-helices. The probable arrangement of the seven helices, in all receptors, was deduced from structural information extracted from a detailed analysis of the sequences. Constraints established include: (1) each helix must be positioned next to its neighbours in the sequence; (2) helices I, IV and V must be most exposed to the lipid surrounding the receptor and helix III least exposed. (1) is established from the lengths of the shortest loops. (2) is determined by considering: (i) sites of the most conserved residues; (ii) other sites where variability is restricted; (iii) sites that accommodate polar residues; (iv) sites of differences in sequence between pairs or within groups of closely related receptors. Most sites in the last category should be in unimportant positions and are most useful in determining the position and extent of lipid-facing surface in each helix. The structural constraints for the receptors are used to allocate particular helices to the peaks in the recently published projection map of rhodopsin and to propose a tentative three-dimensional arrangement of the helices in G protein-coupled receptors.

Indexed as

Amino Acid SequenceAnimalsGTP-Binding ProteinsHumansMembrane GlycoproteinsMolecular Sequence DataMutationProtein Structure, SecondaryReceptors, Cell SurfaceRhodopsinSequence AlignmentStructure-Activity RelationshipGTP-Binding ProteinsMembrane GlycoproteinsReceptors, Cell SurfaceRhodopsin

Identifiers

PMID8385611
PMCPMC413383
OpenAlexW1445935732

What OpenQuestion holds

Textmetadata
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.