This protein is a member of the serpin superfamily of serine proteinase inhibitors. Its expression is induced by heat shock. HSP47 is expressed by cells present in Endoplasmic Reticulum. These cells synthesize and secrete type I and type II collagen. [3] 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.[1]
Interactions
Heat shock protein 47 has been shown to interact with collagens I, II, III, IV and V.[4]
↑Dafforn TR, Della M, Miller AD (December 2001). "The molecular interactions of heat shock protein 47 (Hsp47) and their implications for collagen biosynthesis". The Journal of Biological Chemistry. 276 (52): 49310–9. doi:10.1074/jbc.M108896200. PMID11592970.
↑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. 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.
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, Tetuya Y, 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.
Koide T, Aso A, Yorihuzi T, Nagata K (September 2000). "Conformational requirements of collagenous peptides for recognition by the chaperone protein HSP47". The Journal of Biological Chemistry. 275 (36): 27957–63. doi:10.1074/jbc.M003026200. PMID10862616.
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.
Pelletier G, Stefanovsky VY, Faubladier M, Hirschler-Laszkiewicz I, Savard J, Rothblum LI, Côté J, Moss T (November 2000). "Competitive recruitment of CBP and Rb-HDAC regulates UBF acetylation and ribosomal transcription". Molecular Cell. 6 (5): 1059–66. doi:10.1016/S1097-2765(00)00104-0. PMID11106745.
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.
Zhou M, Nekhai S, Bharucha DC, Kumar A, Ge H, Price DH, Egly JM, Brady JN (November 2001). "TFIIH inhibits CDK9 phosphorylation during human immunodeficiency virus type 1 transcription". The Journal of Biological Chemistry. 276 (48): 44633–40. doi:10.1074/jbc.M107466200. PMID11572868.
Sasaki H, Sato T, Yamauchi N, Okamoto T, Kobayashi D, Iyama S, Kato J, Matsunaga T, Takimoto R, Takayama T, Kogawa K, Watanabe N, Niitsu Y (May 2002). "Induction of heat shock protein 47 synthesis by TGF-beta and IL-1 beta via enhancement of the heat shock element binding activity of heat shock transcription factor 1". Journal of Immunology. 168 (10): 5178–83. doi:10.4049/jimmunol.168.10.5178. PMID11994473.
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.
Sato K, Yomogida K, Wada T, Yorihuzi T, Nishimune Y, Hosokawa N, Nagata K (October 2002). "Type XXVI collagen, a new member of the collagen family, is specifically expressed in the testis and ovary". The Journal of Biological Chemistry. 277 (40): 37678–84. doi:10.1074/jbc.M205347200. PMID12145293.
Rocnik EF, van der Veer E, Cao H, Hegele RA, Pickering JG (October 2002). "Functional linkage between the endoplasmic reticulum protein Hsp47 and procollagen expression in human vascular smooth muscle cells". The Journal of Biological Chemistry. 277 (41): 38571–8. doi:10.1074/jbc.M206689200. PMID12163502.
External links
The MEROPS online database for peptidases and their inhibitors: I04.035
