2002年12月
CTGF/Hcs24 interacts with the cytoskeletal protein actin in chondrocytes
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
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- 巻
- 299
- 号
- 5
- 開始ページ
- 755
- 終了ページ
- 761
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- ACADEMIC PRESS INC ELSEVIER SCIENCE
Connective tissue growth factor/hypertrophic chondrocyte-specific gene product 24 (CTGF/Hcs24) displays multiple functions in several types of mesenchymal cells, including the promotion of proliferation and differentiation of chondrocytes. Recently, the internalization and intracellular function of CTGF/Hcs24 were indicated as well. In this study, a binding protein for this factor was purified from the cytosolic fraction of human chondrosarcoma-derived chondrocytic cell line (HCS-2/8) by CTGF/Hcs24-affinity chromatography. The apparent molecular weight of the protein was 42 kDa and determination of the internal amino acid sequence revealed this protein to be beta- or gamma-actin. An in vitro competitive binding assay of I-125-labeled recombinant CTGF/Hcs24 with cold-rCTGF/Hcs24 showed that the binding between actin and I-125-CTGF/Hcs24 was specific. Immunoprecipitation analysis also showed that CTGF/Hcs24 bound to actin in HCS-2/8 cells. However, rCTGF/Hcs24 had no effects on the expression level of gamma-actin mRNA or total actin protein. These findings suggest that a significant portion of intracellular CTGF/Hcs24 may regulate certain cell biological events in chondrocytes through the interaction with this particular cytoskeletal protein. (C) 2002 Elsevier Science (USA). All rights reserved.
- リンク情報
- ID情報
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- ISSN : 0006-291X
- Web of Science ID : WOS:000180886900013