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Ankycorbin: a novel actin cytoskeleton‐associated protein
Author(s) -
Peng YingFeng,
Mandai Kenji,
Sakisaka Toshiaki,
Okabe Noriko,
Yamamoto Yasunori,
Yokoyama Shigekazu,
Mizoguchi Akira,
Shiozaki Hitoshi,
Monden Morito,
Takai Yoshimi
Publication year - 2000
Publication title -
genes to cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 115
eISSN - 1365-2443
pISSN - 1356-9597
DOI - 10.1046/j.1365-2443.2000.00381.x
Subject(s) - biology , cytoskeleton , actin cytoskeleton , actin , immunoelectron microscopy , microbiology and biotechnology , actin binding protein , cell , biochemistry , genetics , antibody
Actin cytoskeleton structures are essential for a wide variety of cell functions, including cell shape change, cell motility, cell adhesion, cell polarity and cytokinesis. Many actin filament (F‐actin)‐binding proteins have been isolated and implicated in the maintenance and reorganization of actin cytoskeleton structures. We purified here a novel protein with a molecular mass of about 125 kDa (p125) from rat liver. We cloned its cDNA from a mouse kidney cDNA library and determined its nucleotide and deduced amino acid sequences. p125 was a protein of 979 amino acids with a calculated M r of 108 847. p125 contained six ankyrin repeats in the N‐terminal region and a domain predicted to form a coiled‐coil structure in the C‐terminal region. We named p125 ankycorbin ( anky rin repeat‐ and co iled‐coil structure‐containing prote in ). Northern blot analysis indicated that ankycorbin was ubiquitously expressed in all the tissues examined. Immunofluorescence and immunoelectron microscope analyses revealed that ankycorbin was associated with the cortical actin cytoskeleton structures in terminal web and cell‐cell adhesion sites and stress fibres. However, ankycorbin did not directly bind to F‐actin as estimated by the F‐actin co‐sedimentation assay. These results indicate that ankycorbin is indirectly associated with the actin cytoskeleton structures, presumably through an unidentified factor and suggest that it is involved in their maintenance and/or reorganization.