This protein is a member of the serpin superfamily of serine proteinase inhibitors. Its expression is induced by heat shock. HSP47 is expressed in the endoplasmic reticulum. These cells synthesize and secrete type I and type II collagen. [7] The protein localizes to the endoplasmic reticulum lumen and binds collagen; thus it is thought to be a molecular chaperone involved in the maturation of collagen molecules. Autoantibodies to this protein have been found in patients with rheumatoid arthritis.[5]
Interactions[]
Heat shock protein 47 has been shown to interact with collagens I, II, III, IV and V.[8]
^Mala JG, Rose C (November 2010). "Interactions of heat shock protein 47 with collagen and the stress response: an unconventional chaperone model?". Life Sciences. 87 (19–22): 579–86. doi:10.1016/j.lfs.2010.09.024. PMID20888348.
Further reading[]
Razzaque MS, Taguchi T (October 1999). "The possible role of colligin/HSP47, a collagen-binding protein, in the pathogenesis of human and experimental fibrotic diseases". Histology and Histopathology. 14 (4): 1199–212. PMID10506936.
Gettins PG (December 2002). "Serpin structure, mechanism, and function". Chemical Reviews. 102 (12): 4751–804. doi:10.1021/cr010170. PMID12475206.
Clarke EP, Sanwal BD (January 1992). "Cloning of a human collagen-binding protein, and its homology with rat gp46, chick hsp47 and mouse J6 proteins". Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression. 1129 (2): 246–8. doi:10.1016/0167-4781(92)90498-o. PMID1309665.
Ikegawa S, Sudo K, Okui K, Nakamura Y (1995). "Isolation, characterization and chromosomal assignment of human colligin-2 gene (CBP2)". Cytogenetics and Cell Genetics. 71 (2): 182–6. doi:10.1159/000134103. PMID7656593.
Ikegawa S, Nakamura Y (July 1997). "Structure of the gene encoding human colligin-2 (CBP2)". Gene. 194 (2): 301–3. doi:10.1016/S0378-1119(97)00209-6. PMID9272875.
Bekri S, Adélaïde J, Merscher S, Grosgeorge J, Caroli-Bosc F, Perucca-Lostanlen D, Kelley PM, Pébusque MJ, Theillet C, Birnbaum D, Gaudray P (1998). "Detailed map of a region commonly amplified at 11q13-->q14 in human breast carcinoma". Cytogenetics and Cell Genetics. 79 (1–2): 125–31. doi:10.1159/000134699. PMID9533029.
Hattori T, Fujisawa T, Sasaki K, Yutani Y, Nakanishi T, Takahashi K, Takigawa M (April 1998). "Isolation and characterization of a rheumatoid arthritis-specific antigen (RA-A47) from a human chondrocytic cell line (HCS-2/8)". Biochemical and Biophysical Research Communications. 245 (3): 679–83. doi:10.1006/bbrc.1998.8505. PMID9588174.
Nagai N, Yorihuzi T, Hosokawa N, Nagata K (February 1999). "The human genome has only one functional hsp47 gene (CBP2) and a pseudogene (pshsp47)". Gene. 227 (2): 241–8. doi:10.1016/S0378-1119(98)00592-7. PMID10023073.
Hebert C, Norris K, Della Coletta R, Reynolds M, Ordóñez J, Sauk JJ (May 1999). "Cell surface colligin/Hsp47 associates with tetraspanin protein CD9 in epidermoid carcinoma cell lines". Journal of Cellular Biochemistry. 73 (2): 248–58. doi:10.1002/(SICI)1097-4644(19990501)73:2<248::AID-JCB11>3.0.CO;2-A. PMID10227388.
Hattori T, Takahash K, Yutani Y, Fujisawa T, Nakanishi T, Takigawa M (2001). "Rheumatoid arthritis-related antigen 47kDa (RA-A47) is a product of colligin-2 and acts as a human HSP47". Journal of Bone and Mineral Metabolism. 18 (6): 328–34. doi:10.1007/s007740070004. PMID11052465. S2CID35696096.
Matsuda M, Koide T, Yorihuzi T, Hosokawa N, Nagata K (January 2001). "Molecular cloning of a novel ubiquitin-like protein, UBIN, that binds to ER targeting signal sequences". Biochemical and Biophysical Research Communications. 280 (2): 535–40. doi:10.1006/bbrc.2000.4149. PMID11162551.
Razzaque MS, Ahmed AR (March 2002). "Collagens, collagen-binding heat shock protein 47 and transforming growth factor-beta 1 are induced in cicatricial pemphigoid: possible role(s) in dermal fibrosis". Cytokine. 17 (6): 311–6. doi:10.1006/cyto.2002.1020. PMID12061838.