FGD4, Official Symbol FGD4provided by HGNC Official Full Name FYVE, RhoGEF and PH domain containing 4provided by HGNC Primary source HGNC:HGNC:19125 See related Ensembl:ENSG00000139132 MIM:611104; AllianceGenome:HGNC:19125 Gene type protein coding RefSeq status REVIEWED Organism Homo sapiens Lineage Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo Also known as CMT4H; FRABP; ZFYVE6 Summary This gene encodes a protein that is involved in the regulation of the actin cytoskeleton and cell shape. This protein contains an actin filament-binding domain, which together with its Dbl homology domain and one of its pleckstrin homology domains, can form microspikes. This protein can activate MAPK8 independently of the actin filament-binding domain, and it is also involved in the activation of CDC42 via the exchange of bound GDP for free GTP. The activation of CDC42 also enables this protein to play a role in mediating the cellular invasion of Cryptosporidium parvum, an intracellular parasite that infects the gastrointestinal tract. Mutations in this gene can cause Charcot-Marie-Tooth disease type 4H (CMT4H), a disorder of the peripheral nervous system. Multiple alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2015] Expression Ubiquitous expression in ovary (RPKM 8.0), stomach (RPKM 6.8) and 25 other tissues See more Orthologs mouse all