The PACT domain, a conserved centrosomal targeting motif in the coiled-coil proteins AKAP450 and pericentrin.
AKAP450 (also known as AKAP350, CG-NAP or Hyperion) and pericentrin are large coiled-coil proteins found in mammalian centrosomes that serve to recruit structural and regulatory components including dynein and protein kinase A. We find that these proteins share a well conserved 90 amino acid domain near their C-termini that is also found in coiled-coil proteins of unknown function from Drosophila and fission yeast. Fusion of the C-terminal region from either protein to a reporter protein confers a centrosomal localization, and overexpression of the domain from AKAP450 displaces endogenous pericentrin, suggesting recruitment to a shared site. When isolated from transfected cells the C-terminal domain of AKAP450 was associated with calmodulin, suggesting that this protein could contribute to centrosome assembly.
MRC Laboratory of Molecular Biology, Cambridge, UK.
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Gillingham
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Munro
D054758:A Kinase Anchor Proteins; D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence; D000818:Animals; D000941:Antigens / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D019556:COS Cells; D002147:Calmodulin / Q000378:metabolism; D002352:Carrier Proteins; D018385:Centrosome / Q000648:ultrastructure*; D017124:Conserved Sequence; D017868:Cyclic AMP-Dependent Protein Kinases / Q000737:chemistry / Q000378:metabolism; D003598:Cytoskeletal Proteins; D004330:Drosophila / Q000737:chemistry; D049452:Green Fluorescent Proteins; D006801:Humans; D008164:Luminescent Proteins / Q000737:chemistry / Q000378:metabolism; D008856:Microscopy, Fluorescence; D008869:Microtubule-Associated Proteins / Q000737:chemistry*; D008957:Models, Genetic; D008969:Molecular Sequence Data; D010957:Plasmids / Q000378:metabolism; D011401:Promoter Regions, Genetic; D011485:Protein Binding; D017434:Protein Structure, Tertiary; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D012568:Schizosaccharomyces / Q000737:chemistry; D017386:Sequence Homology, Amino Acid; D014162:Transfection; D014404:Tubulin / Q000737:chemistry / Q000378:metabolism
D054758:A Kinase Anchor Proteins; C119719:AKAP9 protein, human; D048868:Adaptor Proteins, Signal Transducing; D000941:Antigens; D002147:Calmodulin; D002352:Carrier Proteins; D003598:Cytoskeletal Proteins; D008164:Luminescent Proteins; D008869:Microtubule-Associated Proteins; D011993:Recombinant Fusion Proteins; D014404:Tubulin; C086178:pericentrin; D049452:Green Fluorescent Proteins; D017868:Cyclic AMP-Dependent Protein Kinases