title: An interaction domain in Slob necessary for its binding to the slowpoke calcium-dependent potassium channel.
abstract: Slob modulates the activity of the Drosophila Slowpoke calcium-dependent potassium channel (dSlo) via its direct binding to the channel. To characterize the molecular detail of the protein-protein interaction between Slob and dSlo, we constructed a series of Slob mutants that are progressively truncated at either the carboxyl or amino terminal end, and examined the binding of these Slob mutants to dSlo using a co-immunoprecipitation approach. Our data suggest that a small region of 42 amino acids (residues 191-233) in Slob is essential for Slob to interact with the dSlo channel.
authors.affiliation: Department of Neuroscience, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. yzhou@nrc.uab.edu
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhou
authors.forename: Hong
authors.initials: H
authors.lastname: Fei
authors.forename: Irwin B
authors.initials: IB
authors.lastname: Levitan
mesh_terms: D000818:Animals; D002460:Cell Line; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D051037:Large-Conductance Calcium-Activated Potassium Channel alpha Subunits; D051036:Large-Conductance Calcium-Activated Potassium Channels; D009154:Mutation; D015221:Potassium Channels / Q000235:genetics / Q000378:metabolism*; D024681:Potassium Channels, Calcium-Activated / Q000235:genetics / Q000378:metabolism*; D011485:Protein Binding / Q000502:physiology; D017434:Protein Structure, Tertiary / Q000235:genetics
chemical_list: D029721:Drosophila Proteins; C494841:KCNMA1 protein, human; D051037:Large-Conductance Calcium-Activated Potassium Channel alpha Subunits; D051036:Large-Conductance Calcium-Activated Potassium Channels; D015221:Potassium Channels; D024681:Potassium Channels, Calcium-Activated; C111538:Slob protein, Drosophila