COLQ

Acetylcholinesterase collagenic tail peptide also known as AChE Q subunit, acetylcholinesterase-associated collagen, or ColQ is the collagen-tail subunit of acetylcholinesterase found in the neuromuscular junction. In humans it is encoded by the COLQ gene.

COLQ
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 1VZJ
Identifiers
Aliases	COLQ, EAD, CMS5, collagen-like tail subunit (single strand of homotrimer) of asymmetric acetylcholinesterase, collagen like tail subunit of asymmetric acetylcholinesterase
External IDs	OMIM: 603033; MGI: 1338761; HomoloGene: 10437; GeneCards: COLQ; OMA:COLQ - orthologs
Gene location (Human) Chr. Chromosome 3 (human) Band 3p25.1 Start 15,450,133 bp End 15,521,751 bp
Gene location (Mouse) Chr. Chromosome 14 (mouse) Band 14|14 B Start 31,245,039 bp End 31,313,300 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in right uterine tube muscle of thigh granulocyte Skeletal muscle tissue of rectus abdominis testicle apex of heart right auricle sural nerve cerebellar hemisphere right hemisphere of cerebellum Top expressed in thymus pons medulla oblongata spinal cord primary motor cortex inferior colliculi muscle of thigh choroid plexus heart spleen More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein binding extracellular matrix structural constituent heparin binding Cellular component collagen neuromuscular junction synapse synaptic cleft extracellular space plasma membrane cell junction basement membrane extracellular matrix collagen-containing extracellular matrix Biological process establishment of protein localization to membrane regulation of synaptic assembly at neuromuscular junction acetylcholine catabolic process in synaptic cleft skeletal muscle acetylcholine-gated channel clustering neurotransmitter catabolic process extracellular matrix organization Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 8292 382864 Ensembl ENSG00000206561 ENSMUSG00000057606 UniProt Q9Y215 O35348 RefSeq (mRNA) NM_080544 NM_005677 NM_080538 NM_080539 NM_080540 NM_080541 NM_080542 NM_080543 NM_009937 RefSeq (protein) NP_005668 NP_536799 NP_536800 NP_034067 Location (UCSC) Chr 3: 15.45 – 15.52 Mb Chr 14: 31.25 – 31.31 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Function

This gene encodes the subunit of a collagen-like molecule associated with acetylcholinesterase in skeletal muscle. Each molecule is composed of three identical subunits. Each subunit contains a proline-rich attachment domain (PRAD) that binds an acetylcholinesterase tetramer to anchor the catalytic subunit of the enzyme to the basal lamina. Multiple transcript variants encoding different isoforms have been found for this gene.

Clinical significance

Mutations in this gene are associated with endplate acetylcholinesterase deficiency and one of the causes of the neuromuscular disease, congenital myasthenia gravis.

External links

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

Further reading

• Donger C, Krejci E, Serradell AP, et al. (1998). "Mutation in the human acetylcholinesterase-associated collagen gene, COLQ, is responsible for congenital myasthenic syndrome with end-plate acetylcholinesterase deficiency (Type Ic)". Am. J. Hum. Genet. 63 (4): 967–75. doi:10.1086/302059. PMC 1377491. PMID 9758617.
• Ohno K, Brengman JM, Felice KJ, et al. (1999). "Congenital end-plate acetylcholinesterase deficiency caused by a nonsense mutation and an A-->G splice-donor-site mutation at position +3 of the collagenlike-tail-subunit gene (COLQ): how does G at position +3 result in aberrant splicing?". Am. J. Hum. Genet. 65 (3): 635–44. doi:10.1086/302551. PMC 1377969. PMID 10441569.
• Altamirano CV, Lockridge O (1999). "Conserved aromatic residues of the C-terminus of human butyrylcholinesterase mediate the association of tetramers". Biochemistry. 38 (40): 13414–22. doi:10.1021/bi991475+. PMID 10529218.
• Ohno K, Engel AG, Brengman JM, et al. (2000). "The spectrum of mutations causing end-plate acetylcholinesterase deficiency". Ann. Neurol. 47 (2): 162–70. doi:10.1002/1531-8249(200002)47:2<162::AID-ANA5>3.0.CO;2-Q. PMID 10665486. S2CID 9178923.
• Deprez P, Inestrosa NC (2000). "Molecular modeling of the collagen-like tail of asymmetric acetylcholinesterase". Protein Eng. 13 (1): 27–34. doi:10.1093/protein/13.1.27. hdl:10533/172149. PMID 10679527.
• Shapira YA, Sadeh ME, Bergtraum MP, et al. (2002). "Three novel COLQ mutations and variation of phenotypic expressivity due to G240X". Neurology. 58 (4): 603–9. doi:10.1212/wnl.58.4.603. PMID 11865139. S2CID 43142424.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "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. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Ishigaki K, Nicolle D, Krejci E, et al. (2003). "Two novel mutations in the COLQ gene cause endplate acetylcholinesterase deficiency". Neuromuscul. Disord. 13 (3): 236–44. doi:10.1016/s0960-8966(02)00243-2. PMID 12609505. S2CID 19202945.
• Hillman RT, Green RE, Brenner SE (2005). "An unappreciated role for RNA surveillance". Genome Biol. 5 (2): R8. doi:10.1186/gb-2004-5-2-r8. PMC 395752. PMID 14759258.
• Cartaud A, Strochlic L, Guerra M, et al. (2004). "MuSK is required for anchoring acetylcholinesterase at the neuromuscular junction". J. Cell Biol. 165 (4): 505–15. doi:10.1083/jcb.200307164. PMC 2172359. PMID 15159418.
• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The Status, Quality, and Expansion of the NIH Full-Length cDNA Project: The Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
• Dvir H, Harel M, Bon S, et al. (2005). "The synaptic acetylcholinesterase tetramer assembles around a polyproline II helix". EMBO J. 23 (22): 4394–405. doi:10.1038/sj.emboj.7600425. PMC 526459. PMID 15526038.
• Ting AK, Siow NL, Kong LW, Tsim KW (2006). "Transcriptional regulation of acetylcholinesterase-associated collagen ColQ in fast- and slow-twitch muscle fibers". Chem. Biol. Interact. 157–158: 63–70. doi:10.1016/j.cbi.2005.10.009. PMID 16256971.
• Schreiner F, Hoppenz M, Klaeren R, et al. (2007). "Novel COLQ mutation 950delC in synaptic congenital myasthenic syndrome and symptomatic heterozygous relatives". Neuromuscul. Disord. 17 (3): 262–5. doi:10.1016/j.nmd.2006.11.010. PMID 17300939. S2CID 30720410.