CAMDI, a novel disrupted in schizophrenia 1 (DISC1)-binding protein, is required for radial migration.
Centrosomes play a crucial role in the directed migration of developing neurons. However, the underlying mechanism is poorly understood. This study has identified a novel disrupted in schizophrenia 1 (DISC1)-interacting protein, named CAMDI after coiled-coil protein associated with myosin II and DISC1, which translocates to the centrosome in a DISC1-dependent manner. Knockdown of CAMDI by shRNA revealed severely impaired radial migration with disoriented centrosomes. A yeast two-hybrid screen identified myosin II as a binding protein of CAMDI. CAMDI interacts preferentially with phosphomyosin II and induces an accumulation of phosphomyosin II at the centrosome in a DISC1-dependent manner. Interestingly, one single nucleotide polymorphism of the CAMDI gene (R828W) is identified, and its gene product was found to reduce the binding ability to phosphomyosin II. Furthermore, mice with overexpression of R828W in neurons exhibit an impaired radial migration. Our findings indicate that CAMDI is required for radial migration probably through DISC1 and myosin II-mediated centrosome positioning during neuronal development.
Laboratory of Molecular Biochemistry, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan. tfukuda@ls.toyaku.ac.jp
Toshifumi
T
Fukuda
Satoko
S
Sugita
Ryoko
R
Inatome
Shigeru
S
Yanagi
D000818:Animals; D001483:Base Sequence; D019556:COS Cells; D002465:Cell Movement / Q000502:physiology*; D018385:Centrosome / Q000378:metabolism*; D002522:Chlorocebus aethiops; D055785:Gene Knockdown Techniques; D057809:HEK293 Cells; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D008969:Molecular Sequence Data; D024462:Myosin Type II / Q000235:genetics / Q000378:metabolism; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism*; D055495:Neurogenesis / Q000502:physiology*; D009474:Neurons / Q000166:cytology / Q000378:metabolism*
C555242:CCDC141 protein, human; C555241:CCDC141 protein, mouse; C412476:DISC1 protein, human; C498794:Disc1 protein, mouse; D047908:Intracellular Signaling Peptides and Proteins; D009419:Nerve Tissue Proteins; D024462:Myosin Type II