title: Regulation of voltage-gated Ca2+ channels by calmodulin.
abstract: Calmodulin, a highly versatile and ubiquitously expressed Ca2+ sensor, regulates the function of many enzymes and ion channels. Both Ca2+-dependent inactivation and Ca2+-dependent facilitation of the voltage-gated Ca2+ channels Cav1.2 and Cav2.1 are regulated through an interaction with Ca2+-bound calmodulin. This review addresses the functional regulation of Cav1.2 and Cav2.1 by calmodulin and discusses how Ca2+ binding to a single calmodulin molecule can regulate opposing functions of the voltage-gated Ca2+ channels.
authors.affiliation: Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030, USA.
authors.forename: D Brent
authors.initials: DB
authors.lastname: Halling
authors.forename: Paula
authors.initials: P
authors.lastname: Aracena-Parks
authors.forename: Susan L
authors.initials: SL
authors.lastname: Hamilton
mesh_terms: D017398:Alternative Splicing; D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D000818:Animals; D001296:Audiovisual Aids; D001665:Binding Sites; D002118:Calcium / Q000378:metabolism; D015220:Calcium Channels / Q000737:chemistry / Q000502:physiology*; D020746:Calcium Channels, L-Type / Q000502:physiology; D020864:Calcium Channels, N-Type / Q000502:physiology; D002147:Calmodulin / Q000737:chemistry / Q000502:physiology*; D006801:Humans; D015640:Ion Channel Gating / Q000502:physiology; D017136:Ion Transport; D007700:Kinetics; D008958:Models, Molecular; D008969:Molecular Sequence Data; D011485:Protein Binding; D011487:Protein Conformation; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
chemical_list: D002118:Calcium; D015220:Calcium Channels; D020746:Calcium Channels, L-Type; D020864:Calcium Channels, N-Type; D002147:Calmodulin; C419385:L-type calcium channel alpha(1C)