Prex1 phosphatidylinositol-3,4,5-trisphosphate-dependent Rac exchange factor 1 [Mus musculus (house mouse)] - Gene

Summary

Official Symbol: Prex1provided by MGI
Official Full Name: phosphatidylinositol-3,4,5-trisphosphate-dependent Rac exchange factor 1provided by MGI
Primary source: MGI:MGI:3040696
See related: Ensembl:ENSMUSG00000039621 AllianceGenome:MGI:3040696
Gene type: protein coding
RefSeq status: VALIDATED
Organism: Mus musculus
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Glires; Rodentia; Myomorpha; Muroidea; Muridae; Murinae; Mus; Mus
Also known as: Setd6; P-REX1; G630042G04
Summary: Predicted to enable GTPase activator activity; guanyl-nucleotide exchange factor activity; and phospholipid binding activity. Acts upstream of or within several processes, including neutrophil chemotaxis; positive regulation of GTPase activity; and positive regulation of substrate adhesion-dependent cell spreading. Predicted to be located in several cellular components, including dendritic shaft; growth cone; and perinuclear region of cytoplasm. Predicted to be active in plasma membrane. Is expressed in several structures, including liver; nervous system; palatal shelf; skeleton; and testis. Used to study autism spectrum disorder. Orthologous to human PREX1 (phosphatidylinositol-3,4,5-trisphosphate dependent Rac exchange factor 1). [provided by Alliance of Genome Resources, Apr 2025]
Expression: Broad expression in thymus adult (RPKM 69.0), spleen adult (RPKM 46.4) and 25 other tissues See more
Orthologs: human all
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Genomic context

Location:: 2 H3; 2 87.09 cM

Exon count:: 40

Annotation release	Status	Assembly	Chr	Location
RS_2024_02	current	GRCm39 (GCF_000001635.27)	2	NC_000068.8 (166408265..166555752, complement)
108.20200622	previous assembly	GRCm38.p6 (GCF_000001635.26)	2	NC_000068.7 (166566345..166713832, complement)

Chromosome 2 - NC_000068.8 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: Mouse ENCODE transcriptome data
Description: RNA profiling data sets generated by the Mouse ENCODE project.
BioProject: PRJNA66167
Publication: PMID 25409824
Analysis date: n/a

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Pharmacological Inhibition of P-Rex1/Rac1 Axis Blocked Angiotensin II-Induced Cardiac Fibrosis.
Title: Pharmacological Inhibition of P-Rex1/Rac1 Axis Blocked Angiotensin II-Induced Cardiac Fibrosis.
PtdIns(3,4,5)P3-dependent Rac exchanger 1 (P-Rex1) promotes mammary tumor initiation and metastasis.
Title: PtdIns(3,4,5)P(3)-dependent Rac exchanger 1 (P-Rex1) promotes mammary tumor initiation and metastasis.
These findings identify P-Rex1 as a novel player of pulmonary fibrosis.
Title: Identification of P-Rex1 as an anti-inflammatory and anti-fibrogenic target for pulmonary fibrosis.
A novel mechanism of P-Rex1 regulation through the GPCR-adaptor protein Norbin.
Title: Norbin Stimulates the Catalytic Activity and Plasma Membrane Localization of the Guanine-Nucleotide Exchange Factor P-Rex1.
Tiam1 and P-Rex1 promote Rac1 anti- and pro-migratory signalling cascades.
Title: Differential Rac1 signalling by guanine nucleotide exchange factors implicates FLII in regulating Rac1-driven cell migration.
findings suggest a vital role of P-Rex1 signaling in CA1 LTD that is critical for social behavior and cognitive function and offer new insight into the etiology of ASDs
Title: Synaptic P-Rex1 signaling regulates hippocampal long-term depression and autism-like social behavior.
regulates GPCR-driven Rac signalling and actin polarity in neutrophils
Title: P-Rex1 directly activates RhoG to regulate GPCR-driven Rac signalling and actin polarity in neutrophils.
Platelet P-Rex and Vav family Rac-GEFs play important proinflammatory roles in leukocyte recruitment.
Title: P-Rex and Vav Rac-GEFs in platelets control leukocyte recruitment to sites of inflammation.
We have elucidated a proliferative role of P-Rex1 when Rac1 is deleted in melanoblasts.
Title: A Rac1-independent role for P-Rex1 in melanoblasts.
P-Rex1 may serve as a biomarker to predict response to single-agent PI3K inhibitors within a subset of breast cancers.
Title: PI3K regulates MEK/ERK signaling in breast cancer via the Rac-GEF, P-Rex1.

Submit: New GeneRIF Correction See all GeneRIFs (20)

Variation

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Alleles

Alleles of this type are documented at Mouse Genome Informatics (MGI)

Endonuclease-mediated (3)
Targeted (2) 1 citation

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

BC067047 (e-PCR), detects polymorphism
- UniSTS:507420

BB045044 (e-PCR)
- UniSTS:185517

Gene Ontology Provided by MGI

Function	Evidence Code	Pubs
enables GTPase activator activity	IBA Inferred from Biological aspect of Ancestor more info
enables guanyl-nucleotide exchange factor activity	IBA Inferred from Biological aspect of Ancestor more info
enables guanyl-nucleotide exchange factor activity	IEA Inferred from Electronic Annotation more info
enables phospholipid binding	IEA Inferred from Electronic Annotation more info
enables phospholipid binding	ISO Inferred from Sequence Orthology more info
enables protein serine/threonine kinase inhibitor activity	IBA Inferred from Biological aspect of Ancestor more info

Process	Evidence Code	Pubs
involved_in G protein-coupled receptor signaling pathway	IBA Inferred from Biological aspect of Ancestor more info
acts_upstream_of_or_within G protein-coupled receptor signaling pathway	IGI Inferred from Genetic Interaction more info	PubMed
acts_upstream_of_or_within T cell differentiation	IGI Inferred from Genetic Interaction more info	PubMed
involved_in intracellular signal transduction	IEA Inferred from Electronic Annotation more info
involved_in negative regulation of TOR signaling	IBA Inferred from Biological aspect of Ancestor more info
acts_upstream_of_or_within neutrophil chemotaxis	IGI Inferred from Genetic Interaction more info	PubMed
acts_upstream_of_or_within positive regulation of GTPase activity	IGI Inferred from Genetic Interaction more info	PubMed
acts_upstream_of_or_within positive regulation of cell adhesion	IGI Inferred from Genetic Interaction more info	PubMed
involved_in positive regulation of cell migration	IEA Inferred from Electronic Annotation more info
involved_in positive regulation of cell migration	ISO Inferred from Sequence Orthology more info
acts_upstream_of_or_within positive regulation of substrate adhesion-dependent cell spreading	IGI Inferred from Genetic Interaction more info	PubMed
acts_upstream_of_or_within reactive oxygen species metabolic process	IGI Inferred from Genetic Interaction more info	PubMed
involved_in regulation of actin filament polymerization	IEA Inferred from Electronic Annotation more info
involved_in regulation of actin filament polymerization	ISO Inferred from Sequence Orthology more info
involved_in regulation of dendrite development	IEA Inferred from Electronic Annotation more info
involved_in regulation of dendrite development	ISO Inferred from Sequence Orthology more info

Component	Evidence Code	Pubs
located_in cytosol	IEA Inferred from Electronic Annotation more info
located_in cytosol	ISO Inferred from Sequence Orthology more info
located_in dendritic shaft	IEA Inferred from Electronic Annotation more info
located_in dendritic shaft	ISO Inferred from Sequence Orthology more info
located_in growth cone	IEA Inferred from Electronic Annotation more info
located_in growth cone	ISO Inferred from Sequence Orthology more info
located_in perinuclear region of cytoplasm	IEA Inferred from Electronic Annotation more info
located_in perinuclear region of cytoplasm	ISO Inferred from Sequence Orthology more info
is_active_in plasma membrane	IBA Inferred from Biological aspect of Ancestor more info
located_in plasma membrane	IEA Inferred from Electronic Annotation more info

General protein information

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Preferred Names: phosphatidylinositol 3,4,5-trisphosphate-dependent Rac exchanger 1 protein

Names: SET domain containing 6; ptdIns(3,4,5)-dependent Rac exchanger 1

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

NM_177782.3 → NP_808450.2 phosphatidylinositol 3,4,5-trisphosphate-dependent Rac exchanger 1 protein

See identical proteins and their annotated locations for NP_808450.2

Status: VALIDATED

Source sequence(s)

AK173168

Consensus CDS

CCDS38334.1

UniProtKB/Swiss-Prot

A2A5U1, Q69ZK0, Q6PFD4, Q8BN08

UniProtKB/TrEMBL

B2RXQ5, B9EKR4

Related

ENSMUSP00000037180.6, ENSMUST00000036719.12

Conserved Domains (6) summary

smart00228
Location:630 → 697

PDZ; Domain present in PSD-95, Dlg, and ZO-1/2

cd00136
Location:714 → 768

PDZ; PDZ domain, also called DHR (Dlg homologous region) or GLGF (after a conserved sequence motif). Many PDZ domains bind C-terminal polypeptides, though binding to internal (non-C-terminal) polypeptides and even to lipids has been demonstrated. ...

cd00160
Location:45 → 233

RhoGEF; Guanine nucleotide exchange factor for Rho/Rac/Cdc42-like GTPases; Also called Dbl-homologous (DH) domain. It appears that PH domains invariably occur C-terminal to RhoGEF/DH domains.

cd04440
Location:501 → 593

DEP_2_P-Rex; DEP (Dishevelled, Egl-10, and Pleckstrin) domain 2 found in P-Rex-like proteins. The P-Rex family is the guanine-nucleotide exchange factor (GEF) for the small GTPase Rac that contains an N-terminal RhoGEF domain, two DEP and PDZ domains. Rac-GEF ...

cd01224
Location:239 → 391

PH_Collybistin_ASEF; Collybistin/APC-stimulated guanine nucleotide exchange factor pleckstrin homology (PH) domain

cl02442
Location:409 → 489

DEP; DEP domain, named after Dishevelled, Egl-10, and Pleckstrin, where this domain was first discovered. The function of this domain is still not clear, but it is believed to be important for the membrane association of the signaling proteins in which it is ...