Evidence map›Paper›PMID 9178007›Full record

ArticleGenetics1997

The Caenorhabditis elegans spe-5 gene is required for morphogenesis of a sperm-specific organelle and is associated with an inherent cold-sensitive phenotype.

K Machaca, S W L'Hernault

Open access · bronzeAbstract read
In one paragraph

Article in Genetics, 1997. 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
0.4field-weighted citation impact, top 44% 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

9 citing papers in PubMed, 20 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. The regulation of spermatogenesis and sperm function in nematodes.Seminars in cell & developmental biology · 2014
    Review
  5. Article
  6. 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

2 authors at 1 institution in 1 country.

K MachacaGraduate Division of Biological and Biomedical Sciences, Emory University, Atlanta, Georgia 30322, USA.
S W L'Hernault
Emory University · US

Funding

GENETICS OF CAENORHABDITIS ELEGANS SPERM MORPHOGENESISR01GM040697 · NIGMS · EMORY UNIVERSITY · PI L'HERNAULT, STEVEN W. · 1995 to 2003
$951k
GENETICS OF CAENORHABIDITIS ELEGANS SPERM MORPHOGENESISR29GM040697 · NIGMS · EMORY UNIVERSITY · PI L'HERNAULT, STEVEN W. · 1988 to 1992
–
NIGMS NIH HHS GM40697
6 · The paper itself

Abstract

The nonrandom segregation of organelles to the appropriate compartment during asymmetric cellular division is observed in many developing systems. Caenorhabditis elegans spermatogenesis is an excellent system to address this issue genetically. The proper progression of spermatogenesis requires specialized intracellular organelles, the fibrous body-membranous organelle complexes (FB-MOs). The FB-MOs play a critical role in cytoplasmic partitioning during the asymmetric cellular division associated with sperm meiosis II. Here we show that spe-5 mutants contain defective, vacuolated FB-MOs and usually arrest spermatogenesis at the spermatocyte stage. Occasionally, spe-5 mutants containing defective FB-MOs will form spermatids that are capable of differentiating into functional spermatozoa. These spe-5 spermatids exhibit an incomplete penetrance for tubulin mis-segregation during the second meiotic division. In addition to morphological and FB-MO segregation defects, all six spe-5 mutants are cold-sensitive, exhibiting a more penetrant sterile phenotype at 16 degrees than 25 degrees. This cold sensitivity could be an inherent property of FB-MO morphogenesis.

Indexed as

Genes, HelminthAnimalsCaenorhabditis elegansCell DifferentiationCell NucleusChromosome MappingCold TemperatureGene Expression Regulation, DevelopmentalLarvaMaleMicroscopy, ElectronModels, GeneticMorphogenesisMutationOrganellesPhenotype

Identifiers

PMID9178007
PMCPMC1207998
OpenAlexW2153578925

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.