ARHGEF4

ARHGEF4
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2DX1, 2PZ1, 3NMX, 3NMZ
Identifiers
Aliases	ARHGEF4, ASEF, ASEF1, GEF4, STM6, Rho guanine nucleotide exchange factor 4, SMIM39
External IDs	OMIM: 605216; MGI: 2442507; HomoloGene: 49414; GeneCards: ARHGEF4; OMA:ARHGEF4 - orthologs
Gene location (Human) Chr. Chromosome 2 (human) Band 2q21.1 Start 130,836,914 bp End 131,047,263 bp
Gene location (Mouse) Chr. Chromosome 1 (mouse) Band 1|1 B Start 34,678,188 bp End 34,813,309 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in right frontal lobe nucleus accumbens prefrontal cortex Brodmann area 9 cingulate gyrus anterior cingulate cortex amygdala putamen caudate nucleus Brodmann area 10 Top expressed in central gray substance of midbrain pontine nuclei dorsal tegmental nucleus anterior horn of spinal cord medial vestibular nucleus superior colliculus hippocampus proper dentate gyrus facial motor nucleus nucleus of stria terminalis More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein binding protein domain specific binding guanyl-nucleotide exchange factor activity Cellular component cytoplasm ruffle membrane cytosol plasma membrane cell projection membrane Biological process filopodium assembly regulation of Rho protein signal transduction intracellular signal transduction regulation of small GTPase mediated signal transduction lamellipodium assembly positive regulation of apoptotic process G protein-coupled receptor signaling pathway Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 50649 226970 Ensembl ENSG00000136002 ENSMUSG00000037509 UniProt Q9NR80 Q7TNR9 RefSeq (mRNA) NM_015320 NM_032995 NM_001367493 NM_001375900 NM_001375901 NM_001375902 NM_001375903 NM_001375904 NM_001395416 NM_183019 NM_001368773 RefSeq (protein) NP_056135 NP_001354422 NP_001362829 NP_001362830 NP_001362831 NP_001362832 NP_001362833 NP_898840 NP_001355702 Location (UCSC) Chr 2: 130.84 – 131.05 Mb Chr 1: 34.68 – 34.81 Mb PubMed search
Wikidata
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Rho guanine nucleotide exchange factor 4 is a protein that in humans is encoded by the ARHGEF4 gene.

Function

Rho GTPases play a fundamental role in numerous cellular processes that are initiated by extracellular stimuli that work through G protein-coupled receptors. The encoded protein may form complex with G proteins and stimulate Rho-dependent signals. This protein is similar to rat collybistin protein. Alternative splicing of this gene generates two transcript variants that encode different isoforms. Also, there is possibility for the usage of multiple polyadenylation sites for this gene.

Model organisms

Arhgef4 knockout mouse phenotype

Characteristic	Phenotype
Homozygote viability	Normal
Fertility	Normal
Body weight	Normal
Anxiety	Normal
Neurological assessment	Normal
Grip strength	Normal
Hot plate	Normal
Dysmorphology	Normal
Indirect calorimetry	Normal
Glucose tolerance test	Normal
Auditory brainstem response	Normal
DEXA	Normal
Radiography	Normal
Body temperature	Normal
Eye morphology	Normal
Clinical chemistry	Normal
Haematology	Normal
Peripheral blood lymphocytes	Abnormal
Micronucleus test	Normal
Heart weight	Normal
Salmonella infection	Normal
Citrobacter infection	Normal
All tests and analysis from

Model organisms have been used in the study of ARHGEF4 function. A conditional knockout mouse line, called Arhgef4^{tm1a(KOMP)Wtsi} was generated as part of the International Knockout Mouse Consortium program — a high-throughput mutagenesis project to generate and distribute animal models of disease to interested scientists.

Male and female animals underwent a standardized phenotypic screen to determine the effects of deletion. Twenty two tests were carried out on homozygous mutant mice and one significant abnormality was observed: males has atypical peripheral blood lymphocyte parameters, including a decreased B cell number and an increased granulocyte number.

Interactions

ARHGEF4 has been shown to interact with APC.

External links

• Human ARHGEF4 genome location and ARHGEF4 gene details page in the UCSC Genome Browser.

Further reading

• Nakajima D, Okazaki N, Yamakawa H, et al. (2003). "Construction of expression-ready cDNA clones for KIAA genes: manual curation of 330 KIAA cDNA clones". DNA Res. 9 (3): 99–106. doi:10.1093/dnares/9.3.99. PMID 12168954.
• Kuraguchi M, Wang XP, Bronson RT, et al. (2006). "Adenomatous polyposis coli (APC) is required for normal development of skin and thymus". PLOS Genet. 2 (9): e146. doi:10.1371/journal.pgen.0020146. PMC 1564426. PMID 17002498.{{cite journal}}: CS1 maint: unflagged free DOI (link)
• Watanabe T, Wang S, Noritake J, et al. (2005). "Interaction with IQGAP1 links APC to Rac1, Cdc42, and actin filaments during cell polarization and migration". Dev. Cell. 7 (6): 871–83. doi:10.1016/j.devcel.2004.10.017. PMID 15572129.
• Kawasaki Y, Sato R, Akiyama T (2003). "Mutated APC and Asef are involved in the migration of colorectal tumour cells". Nat. Cell Biol. 5 (3): 211–5. doi:10.1038/ncb937. PMID 12598901. S2CID 22276128.
• Kawasaki Y, Senda T, Ishidate T, et al. (2000). "Asef, a link between the tumor suppressor APC and G-protein signaling". Science. 289 (5482): 1194–7. doi:10.1126/science.289.5482.1194. PMID 10947987.