IQSEC2

IQ motif and Sec7 domain 2
Identifiers
Symbols	IQSEC2 ; BRAG1; MRX1
External IDs	OMIM: 300522 MGI: 3528396 HomoloGene: 19407 GeneCards: IQSEC2 Gene
Gene ontology Molecular function • ARF guanyl-nucleotide exchange factor activity Cellular component • trans-Golgi network Biological process • vesicle-mediated transport • actin cytoskeleton organization • regulation of ARF protein signal transduction • positive regulation of GTPase activity Sources: Amigo / QuickGO
Orthologs
Species	Human	Mouse
Entrez	23096	245666
Ensembl	ENSG00000124313	ENSMUSG00000041115
UniProt	Q5JU85	Q5DU25
RefSeq (mRNA)	NM_001111125	NM_001005475
RefSeq (protein)	NP_001104595	NP_001005475
Location (UCSC)	Chr X: 53.23 – 53.32 Mb	Chr X: 152.14 – 152.23 Mb
PubMed search

IQ motif and Sec7 domain 2 is a protein that in humans is encoded by the IQSEC2 gene.^[1][2]

Function

The IQSEC2 gene encodes a guanine nucleotide exchange factor for the ARF family of GTP-binding proteins (see for example ARF1).^[3]

Clinical significance

It is associated with X-Linked mental retardation 1.^[3]

References

1. "Entrez Gene: IQ motif and Sec7 domain 2".
2. Nagase T, Ishikawa K, Miyajima N, Tanaka A, Kotani H, Nomura N, Ohara O (February 1998). "Prediction of the coding sequences of unidentified human genes. IX. The complete sequences of 100 new cDNA clones from brain which can code for large proteins in vitro". DNA Res. 5 (1): 31–9. doi:10.1093/dnares/5.1.31. PMID 9628581.
3. Shoubridge C, Tarpey PS, Abidi F, Ramsden SL, Rujirabanjerd S, Murphy JA, Boyle J, Shaw M, Gardner A, Proos A, Puusepp H, Raymond FL, Schwartz CE, Stevenson RE, Turner G, Field M, Walikonis RS, Harvey RJ, Hackett A, Futreal PA, Stratton MR, Gécz J (June 2010). "Mutations in the guanine nucleotide exchange factor gene IQSEC2 cause nonsyndromic intellectual disability". Nat. Genet. 42 (6): 486–8. doi:10.1038/ng.588. PMID 20473311.

Further reading

• Ross MT, Grafham DV, Coffey AJ, et al. (2005). "The DNA sequence of the human X chromosome.". Nature 434 (7031): 325–37. doi:10.1038/nature03440. PMC 2665286. PMID 15772651.
• Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs.". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039.
• Filippova GN, Cheng MK, Moore JM, et al. (2005). "Boundaries between chromosomal domains of X inactivation and escape bind CTCF and lack CpG methylation during early development.". Dev. Cell 8 (1): 31–42. doi:10.1016/j.devcel.2004.10.018. PMID 15669143.
• Cox R, Mason-Gamer RJ, Jackson CL, Segev N (2004). "Phylogenetic analysis of Sec7-domain-containing Arf nucleotide exchangers.". Mol. Biol. Cell 15 (4): 1487–505. doi:10.1091/mbc.E03-06-0443. PMC 379250. PMID 14742722.
• Dosemeci A, Makusky AJ, Jankowska-Stephens E, et al. (2007). "Composition of the synaptic PSD-95 complex.". Mol. Cell Proteomics 6 (10): 1749–60. doi:10.1074/mcp.M700040-MCP200. PMC 2096750. PMID 17623647.
• Tsuchiya KD, Greally JM, Yi Y, et al. (2004). "Comparative sequence and x-inactivation analyses of a domain of escape in human xp11.2 and the conserved segment in mouse.". Genome Res. 14 (7): 1275–84. doi:10.1101/gr.2575904. PMC 442142. PMID 15197169.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2002). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Barbe L, Lundberg E, Oksvold P, et al. (2008). "Toward a confocal subcellular atlas of the human proteome.". Mol. Cell Proteomics 7 (3): 499–508. doi:10.1074/mcp.M700325-MCP200. PMID 18029348.
• Murphy JA, Jensen ON, Walikonis RS (2006). "BRAG1, a Sec7 domain-containing protein, is a component of the postsynaptic density of excitatory synapses.". Brain Res. 1120 (1): 35–45. doi:10.1016/j.brainres.2006.08.096. PMID 17045249.