This region is found in conserved oligomeric golgi complex component 4. COG mediates the proper glycosylation of proteins trafficking through the Golgi apparatus and it is a member of the CATCHR (complexes associated with tethering containing helical rods) family, together with the exocyst, GARP and DSL1 complexes, sharing structural and functional features [1,2,4]. They consist of alpha-helical bundles at the middle/C-terminal (described as domains A-D/E) and a N-terminal coiled-coil region [1,2,4]. This entry represents the middle region comprising alpha-helical bundles corresponding to domains B and C. Mutations in COG4 cause fatal congenital disorders of glycosylation (CDGs) in humans [3,5].

1: Identification of Sec36p, Sec37p, and Sec38p: components of yeast complex that contains Sec34p and Sec35p. Ram RJ, Li B, Kaiser CA; Mol Biol Cell 2002;13:1484-1500. PMID:12006647

2: Crystal structure of Sec10, a subunit of the exocyst complex. Chen J, Yamagata A, Kubota K, Sato Y, Goto-Ito S, Fukai S; Sci Rep. 2017;7:40909. PMID:28098232

3: A Recurrent De Novo Heterozygous COG4 Substitution Leads to Saul-Wilson Syndrome, Disrupted Vesicular Trafficking, and Altered Proteoglycan Glycosylation. Ferreira CR, Xia ZJ, Clement A, Parry DA, Davids M, Taylan F, Sharma P, Turgeon CT, Blanco-Sanchez B, Ng BG, Logan CV, Wolfe LA, Solomon BD, Cho MT, Douglas G, Carvalho DR, Bratke H, Haug MG, Phillips JB, Wegner J, Tiemeyer M, Aoki K, Nordgren A, Hammarsjo A, Duker AL, Rohena L, Hove HB, Ek J, Adams D, Tifft CJ, Onyekweli T, Weixel T, Macnamara E, Radtke K, Powis Z, Earl D, Gabriel M, Russi AHS, Brick L, Kozenko M, Tham E, Raymond KM, Phillips JA 3rd, Tiller GE, Wilson WG, Hamid R, Malicdan MCV, Nishimura G, Grigelioniene G, Jackson A, Westerfield M, Bober MB, Gahl WA, Freeze HH; Am J Hum Genet. 2018;103:553-567. PMID:30290151

4: Homology and Modular Evolution of CATCHR at the Origin of the Eukaryotic Endomembrane System. Santana-Molina C, Gutierrez F, Devos DP; Genome Biol Evol. 2021; [Epub ahead of print] PMID:34061181

5: Structural basis for a human glycosylation disorder caused by mutation of the COG4 gene. Richardson BC, Smith RD, Ungar D, Nakamura A, Jeffrey PD, Lupashin VV, Hughson FM; Proc Natl Acad Sci U S A. 2009;106:13329-13334. PMID:19651599