Evidence map›Paper›PMID 40748210›Full record

ArticleDevelopment (Cambridge, England)2025

A PDZ-RapGEF promotes synaptic development in Caenorhabditis elegans through a Rap/Rac signaling pathway.

Reagan Lamb, Michael Scales, Julie Watkins, Martin Werner, Salvatore J Cherra

Abstract read
In one paragraph

Article in Development (Cambridge, England), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Reagan LambDepartment of Neuroscience, University of Kentucky College of Medicine, 780 Rose St, Lexington, KY 40536, USA.ORCID 0000-0002-3390-401X
Michael ScalesDepartment of Neuroscience, University of Kentucky College of Medicine, 780 Rose St, Lexington, KY 40536, USA.
Julie WatkinsDepartment of Neuroscience, University of Kentucky College of Medicine, 780 Rose St, Lexington, KY 40536, USA.
Martin WernerDepartment of Neuroscience, University of Kentucky College of Medicine, 780 Rose St, Lexington, KY 40536, USA.
Salvatore J CherraDepartment of Neuroscience, University of Kentucky College of Medicine, 780 Rose St, Lexington, KY 40536, USA.ORCID 0000-0003-1581-9150

Funding

Enhancing and expanding the CGC Strain CollectionP40OD010440 · OD · UNIVERSITY OF MINNESOTA · PI Ann E. Rougvie · 2012 to 2026
$7.5M
Regulation of synapse development by small GTPase cascades in Caenorhabditis elegansR01NS129668 · NINDS · UNIVERSITY OF KENTUCKY · PI Salvatore James Cherra · 2023 to 2026
$1.6M
Understanding the molecular mechanisms that maintain excitation-inhibition balance in neural circuitsR00NS097638 · NINDS · UNIVERSITY OF KENTUCKY · PI CHERRA, SALVATORE JAMES · 2019 to 2021
$738k
Understanding the molecular mechanisms that maintain excitation-inhibition balance in neural circuitsK99NS097638 · NINDS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI CHERRA, SALVATORE JAMES · 2016 to 2017
$182k
Role of C. elegans RAPGEF in Synapse Development at the Neuromuscular JunctionF31NS129159 · NINDS · UNIVERSITY OF KENTUCKY · PI LAMB, REAGAN ELIZABETH MAYFIELD · 2023 to 2024
$39k
NIH HHS P40 OD010440NINDS NIH HHS F31 NS129159NINDS NIH HHS K99 NS097638NINDS NIH HHS NS097638NINDS NIH HHS NS129159NINDS NIH HHS NS129159-01A1NINDS NIH HHS NS129668NINDS NIH HHS NS129668-01A1NINDS NIH HHS R00 NS097638NINDS NIH HHS R01 NS129668University of Kentucky
6 · The paper itself

Abstract

Small G proteins coordinate the development of nerve terminals. The activity of G proteins is finely tuned by GTPase regulatory proteins. Previously, we have observed that PXF-1, a Caenorhabditis elegans GTPase regulatory protein, is required for the function of cholinergic motor neurons. Here, we investigated how PXF-1 coordinates the development of presynaptic terminals at the molecular level. We observed that PXF-1 acts through RAP-1 to promote synapse development. Subsequently, we found that pxf-1 mutants display a reduction in RAC-2 activity, which is required for cholinergic synapse development. We observed that RAC-2 acts downstream of RAP-1. Finally, we identified a physical interaction between RAP-1 and TIAM-1, a Rac guanine exchange factor, which links PXF-1 function to the presynaptic actin cytoskeleton through RAC-2 activation. These findings highlight how small G protein signaling pathways interact to coordinate the development of presynaptic terminals.

Indexed as

Caenorhabditis elegansCaenorhabditis elegans ProteinsGuanine Nucleotide Exchange Factorsrac GTP-Binding Proteinsrap GTP-Binding ProteinsSignal TransductionSynapsesAnimalsMutationPDZ DomainsPresynaptic TerminalsCaenorhabditis elegans ProteinsGuanine Nucleotide Exchange Factorsrac GTP-Binding Proteinsrap GTP-Binding ProteinsFRET-FLIMG proteinsNeuromuscular junctionRapGEFSynaptic vesicles

Identifiers

PMID40748210
PMCPMC12448318

What Socratic holds

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LicenceCC BY
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 Socratic graph.