Evidence map›Paper›PMID 18367645›Full record

ArticleGenes & development2008

The conserved plant sterility gene HAP2 functions after attachment of fusogenic membranes in Chlamydomonas and Plasmodium gametes.

Yanjie Liu, Rita Tewari, Jue Ning, Andrew M Blagborough, Sara Garbom, Jimin Pei, Nick V Grishin, Robert E Steele, Robert E Sinden, William J Snell and 1 more

Open access · diamondAbstract read
In one paragraph

Article in Genes & development, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 179 papers.

0numbers the graph read from it
0cells of the map it votes in
179citing 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

179 citing papers in PubMed, 339 citations in OpenAlex.

  1. Article
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  3. The SPARK complex forms the molecular basis of vertebrate fertilization.bioRxiv : the preprint server for biology · 2026
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  5. A single-cell atlas ofbioRxiv : the preprint server for biology · 2026
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  6. Intermediate evolutionary state of motile sperm and pollen tubes in the extant gymnospermProceedings of the National Academy of Sciences of the United States of America · 2026
    Article
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  19. mBio · 2024
    Article
  20. Article

119 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

11 authors at 6 institutions in 2 countries.

Yanjie LiuDepartment of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.
Rita Tewari
Jue Ning
Andrew M Blagborough
Sara Garbom
Jimin Pei
Nick V Grishin
Robert E Steele
Robert E Sinden
William J Snell
Oliver Billker
The University of Texas Southwestern Medical Center · USHoward Hughes Medical Institute · USImperial College London · GBWellcome Sanger Institute · GBQueen's Medical Centre · GBUniversity of California, Irvine · US

Funding

MEMBRANE FUSION IN CHLAMYDOMONASR01GM056778 · NIGMS · UT SOUTHWESTERN MEDICAL CENTER · PI SNELL, WILLIAM J · 1998 to 2017
$4.2M
Biotechnology and Biological Sciences Research CouncilMedical Research Council G0501670NIGMS NIH HHS GM056778NIGMS NIH HHS R01 GM056778Wellcome Trust
6 · The paper itself

Abstract

The cellular and molecular mechanisms that underlie species-specific membrane fusion between male and female gametes remain largely unknown. Here, by use of gene discovery methods in the green alga Chlamydomonas, gene disruption in the rodent malaria parasite Plasmodium berghei, and distinctive features of fertilization in both organisms, we report discovery of a mechanism that accounts for a conserved protein required for gamete fusion. A screen for fusion mutants in Chlamydomonas identified a homolog of HAP2, an Arabidopsis sterility gene. Moreover, HAP2 disruption in Plasmodium blocked fertilization and thereby mosquito transmission of malaria. HAP2 localizes at the fusion site of Chlamydomonas minus gametes, yet Chlamydomonas minus and Plasmodium hap2 male gametes retain the ability, using other, species-limited proteins, to form tight prefusion membrane attachments with their respective gamete partners. Membrane dye experiments show that HAP2 is essential for membrane merger. Thus, in two distantly related eukaryotes, species-limited proteins govern access to a conserved protein essential for membrane fusion.

Indexed as

Algal ProteinsAnimalsChlamydomonasFemaleGerm CellsMaleMembrane FusionPlasmodium bergheiProtozoan ProteinsSperm-Ovum InteractionsAlgal ProteinsProtozoan Proteins

Identifiers

PMID18367645
PMCPMC2335326
OpenAlexW2070967699

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.