Evidence map›Paper›PMID 7592418›Full record

ArticleJournal of bacteriology1995

The hglK gene is required for localization of heterocyst-specific glycolipids in the cyanobacterium Anabaena sp. strain PCC 7120.

K Black, W J Buikema, R Haselkorn

Open access · bronzeAbstract read
In one paragraph

Article in Journal of bacteriology, 1995. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed
1.5field-weighted citation impact, top 17% 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

49 citing papers in PubMed, 107 citations in OpenAlex.

  1. Functional organization and regulatory logic of theApplied and environmental microbiology · 2026
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  19. The 1.7 Å resolution structure of At2g44920, a pentapeptide-repeat protein in the thylakoid lumen of Arabidopsis thaliana.Acta crystallographica. Section F, Structural biology and crystallization communications · 2011
    Article
  20. Article
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

3 authors at 1 institution in 1 country.

K BlackDepartment of Molecular Genetics and Cell Biology, University of Chicago, Illinois 60637, USA.
W J Buikema
R Haselkorn
University of Chicago · US

Funding

Molecular And Cellular Biology Training ProgramT32GM007183 · NIGMS · UNIVERSITY OF CHICAGO · PI GLICK, BENJAMIN S, RICE, PHOEBE A · 1985 to 2021
$23.9M
DIFFERENTIATION IN NITROGEN-FIXING BLUE-GREEN ALGAER01GM021823 · NIGMS · UNIVERSITY OF CHICAGO · PI HASELKORN, ROBERT · 1985 to 2000
$239k
GENE REARRANGEMENT IN CYANOBACTERIAL HETEROCYSTR01GM040685 · NIGMS · UNIVERSITY OF CHICAGO · PI HASELKORN, ROBERT · 1988 to 1995
–
NIGMS NIH HHS GM 07183NIGMS NIH HHS GM21823NIGMS NIH HHS GM40685
6 · The paper itself

Abstract

Mutant strain 543 of the cyanobacterium Anabaena sp. strain PCC 7120 was originally isolated as a Fox- mutant following chemical mutagenesis. Ultrastructural analysis shows that in nitrogen-replete media the vegetative cells of the mutant are more cylindrical and have thicker septa than those of the wild type, while in nitrogen-free media the mutant heterocysts lack the normal glycolipid layer external to the cell wall. Although this layer is absent, strain 543 heterocysts nevertheless contain heterocyst-specific glycolipids, as determined by thin-layer chromatography. The mutation in strain 543 is in a gene we have named hglK, encoding a protein of 727 amino acids. The wild-type HglK protein appears to contain four membrane-spanning regions followed by 36 repeats of a degenerate pentapeptide sequence, AXLXX. The mutation in strain 543 introduces a termination codon immediately upstream of the pentapeptide repeat region. A mutant constructed by insertion of an antibiotic resistance cassette near the beginning of the hglK gene has the same phenotype as strain 543. We propose that hglK encodes a protein necessary for the localization of heterocyst glycolipids and that this function requires the pentapeptide repeats of the HglK protein.

Indexed as

Amino Acid SequenceAnabaenaBacterial ProteinsBase SequenceCell WallCloning, MolecularCodon, TerminatorCyanobacteriaDNA, BacterialGenes, BacterialGlycolipidsMolecular Sequence DataMutationRepetitive Sequences, Nucleic AcidRestriction MappingRNA, BacterialBacterial ProteinsCodon, TerminatorDNA, BacterialGlycolipidsHglK protein, AnabaenaRNA, Bacterial

Identifiers

PMID7592418
PMCPMC177493
OpenAlexW2112066759

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.