title: Ca2(+)-dependent mobility shift of parvalbumin in one- and two-dimensional gel-electrophoresis.
abstract: Under Ca2(+)-loaded conditions parvalbumin migrates in one- and two-dimensional gel-systems as a double-band or -spot whereas in Ca2(+)-free condition it appears as one band or spot. Parvalbumin (PV), a member of the family of calcium-binding proteins [1], was first described in 1934 [2] and occurs in fast-contracting muscles and in subpopulations of neurons in vertebrates and humans [3,4,5]. The physical characteristics of molecular weight (Mv 12 KD), isoelectric point (pI 4.9) and Ca2(+)-binding properties are established (PV binds 2 Ca2+ per molecule) [5,6]. Physiological roles discussed for PV range from trigger- to buffer-protein of intracellular Ca2(+)-ions [7]. In this paper we report an as yet not described mobility shift of PV in gel-electrophoresis after manipulation of the Ca2+ concentration, which may have implications for its physiological function.
authors.affiliation: Institut für Anatomie, Christian Albrechts Universität zu Kiel, West-Germany.
authors.forename: H J
authors.initials: HJ
authors.lastname: Gregersen
authors.forename: C W
authors.initials: CW
authors.lastname: Heizmann
authors.forename: U
authors.initials: U
authors.lastname: Kaegi
authors.forename: M R
authors.initials: MR
authors.lastname: Celio
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism*; D004533:Egtazic Acid / Q000378:metabolism; D015180:Electrophoresis, Gel, Two-Dimensional; D004591:Electrophoresis, Polyacrylamide Gel; D009124:Muscle Proteins / Q000378:metabolism*; D009132:Muscles / Q000378:metabolism; D010320:Parvalbumins / Q000378:metabolism* / Q000502:physiology; D051381:Rats
chemical_list: D009124:Muscle Proteins; D010320:Parvalbumins; D004533:Egtazic Acid; D002118:Calcium