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.[5][6]

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
Gene location (Human) Chr. Chromosome 3 (human)[1] Band 3p25.1 Start 15,450,133 bp[1] End 15,521,751 bp[1]
Gene location (Mouse) Chr. Chromosome 14 (mouse)[2] Band 14|14 B Start 31,523,082 bp[2] End 31,591,343 bp[2]
RNA expression pattern More reference expression data
Gene ontology Molecular function • GO:0001948 protein binding • extracellular matrix structural constituent • heparin binding Cellular component • collagen • basal lamina • neuromuscular junction • synapse • synaptic cleft • extracellular • cell membrane • cell junction • basement membrane • extracellular matrix • collagen-containing extracellular matrix Biological process • establishment of protein localization to membrane • regulation of synaptic growth 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: 31.52 – 31.59 Mb
PubMed search	[3]	[4]
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.[6]

Clinical significance

Mutations in this gene are associated with endplate acetylcholinesterase deficiency.[6]

References

1. GRCh38: Ensembl release 89: ENSG00000206561 - Ensembl, May 2017
2. GRCm38: Ensembl release 89: ENSMUSG00000057606 - Ensembl, May 2017
3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
5. Ohno K, Brengman J, Tsujino A, Engel AG (Sep 1998). "Human endplate acetylcholinesterase deficiency caused by mutations in the collagen-like tail subunit (ColQ) of the asymmetric enzyme". Proc Natl Acad Sci U S A. 95 (16): 9654–9. doi:10.1073/pnas.95.16.9654. PMC 21394. PMID 9689136.
6. "Entrez Gene: COLQ collagen-like tail subunit (single strand of homotrimer) of asymmetric acetylcholinesterase".

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.
• 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. 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.
• 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. 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.
• 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.