This model describes the P-type ATPase responsible for translocating calcium ions across the golgi membrane of fungi and animals, and is of particular importance in the sarcoplasmic reticulum of skeletal and cardiac muscle in vertebrates. The calcium P-type ATPases have been characterized as Type IIA based on a phylogenetic analysis which distinguishes this group from the Type IIB PMCA calcium pump modelled by TIGR01517. A separate analysis divides Type IIA into sub-types, SERCA and PMR1, the former of which is modelled by TIGR01116.
Jiyao W et al.(2023). "The conserved domain database in 2023.",