title: Calcineurin homologous protein: a multifunctional Ca2+-binding protein family.
abstract: The calcineurin homologous protein (CHP) belongs to an evolutionarily conserved Ca(2+)-binding protein subfamily. The CHP subfamily is composed of CHP1, CHP2, and CHP3, which in vertebrates share significant homology at the protein level with each other and between other Ca(2+)-binding proteins. The CHP structure consists of two globular domains containing from one to four EF-hand structural motifs (calcium-binding regions composed of two helixes, E and F, joined by a loop), the myristoylation, and nuclear export signals. These structural features are essential for the function of the three members of the CHP subfamily. Indeed, CHP1-CHP3 have multiple and diverse essential functions, ranging from the regulation of the plasma membrane Na(+)/H(+) exchanger protein function, to carrier vesicle trafficking and gene transcription. The diverse functions attributed to the CHP subfamily rendered an understanding of its action highly complex and often controversial. This review provides a comprehensive and organized examination of the properties and physiological roles of the CHP subfamily with a view to revealing a link between CHP diverse functions.
authors.affiliation: Department of Internal Medicine, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd., Dallas, TX 75390-8885, USA. francesca.disole@utsouthwestern.edu
authors.forename: Francesca
authors.initials: F
authors.lastname: Di Sole
authors.forename: Komal
authors.initials: K
authors.lastname: Vadnagara
authors.forename: Orson W
authors.initials: OW
authors.lastname: Moe
authors.forename: Victor
authors.initials: V
authors.lastname: Babich
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002135:Calcium-Binding Proteins / Q000032:analysis / Q000737:chemistry / Q000502:physiology*; D006801:Humans; D008969:Molecular Sequence Data; D021381:Protein Transport / Q000502:physiology; D017923:Sodium-Hydrogen Exchangers / Q000502:physiology; D014158:Transcription, Genetic / Q000502:physiology
chemical_list: D002135:Calcium-Binding Proteins; D017923:Sodium-Hydrogen Exchangers