This entry includes Vma22 from yeasts and CCDC115, the orthologue from mammals. Vma22 is an endoplasmic reticulum-associated protein required for V-ATPase activity [1,2]. CCDC115 is an accessory component of the proton-transporting vacuolar (V)- ATPase protein pump involved in intracellular iron homeostasis [1]. Mutations of CCDC115 have been found in patients affected by congenital disorders of glycosylation [1,2].

1: The vacuolar-ATPase complex and assembly factors, TMEM199 and CCDC115, control HIF1alpha prolyl hydroxylation by regulating cellular iron levels. Miles AL, Burr SP, Grice GL, Nathan JA; Elife. 2017; [Epub ahead of print] PMID:28296633

2: Structural basis of V-ATPase V(O) region assembly by Vma12p, 21p, and 22p. Wang H, Bueler SA, Rubinstein JL; Proc Natl Acad Sci U S A. 2023;120:e2217181120. PMID:36724250