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Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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HSPA9

Introduction

Mitochondrial 70kDa heat shock protein (mtHsp70), also known as mortalin, is a protein that in humans is encoded by the HSPA9 gene.[1][2]

Function

Function

The product encoded by this gene belongs to the heat shock protein 70 family which contains both heat-inducible and constitutively expressed members. The latter are called heat-shock cognate proteins. This gene encodes a heat-shock cognate protein. This protein plays a role in the control of cell proliferation. It may also act as a chaperone.[2]

Interactions

Interactions

HSPA9 has been shown to interact with FGF1[3] and P53.[4]

References

References

  1. ↑ Domanico SZ, DeNagel DC, Dahlseid JN, Green JM, Pierce SK (Jun 1993). “Cloning of the gene encoding peptide-binding protein 74 shows that it is a new member of the heat shock protein 70 family”. Mol Cell Biol. 13 (6): 3598–610. PMC 359829. PMID 7684501.
  2. ↑ 2.0 2.1 “Entrez Gene: HSPA9 heat shock 70kDa protein 9 (mortalin)”.
  3. ↑ Mizukoshi E, Suzuki M, Loupatov A, Uruno T, Hayashi H, Misono T, Kaul SC, Wadhwa R, Imamura T (Oct 1999). “Fibroblast growth factor-1 interacts with the glucose-regulated protein GRP75/mortalin”. Biochem. J. 343 Pt 2 (2): 461–6. doi:10.1042/0264-6021:3430461. PMC 1220575. PMID 10510314.
  4. ↑ Wadhwa R, Yaguchi T, Hasan MK, Mitsui Y, Reddel RR, Kaul SC (Apr 2002). “Hsp70 family member, mot-2/mthsp70/GRP75, binds to the cytoplasmic sequestration domain of the p53 protein”. Exp. Cell Res. 274 (2): 246–53. doi:10.1006/excr.2002.5468. PMID 11900485.
Further reading

Further reading

  • Kaul SC, Taira K, Pereira-Smith OM, Wadhwa R (2003). “Mortalin: present and prospective”. Exp. Gerontol. 37 (10–11): 1157–64. doi:10.1016/S0531-5565(02)00135-3. PMID 12470827.
  • Yaguchi T, Aida S, Kaul SC, Wadhwa R (2007). “Involvement of mortalin in cellular senescence from the perspective of its mitochondrial import, chaperone, and oxidative stress management functions”. Ann. N. Y. Acad. Sci. 1100: 306–11. doi:10.1196/annals.1395.032. PMID 17460192.
  • Hochstrasser DF, Frutiger S, Paquet N, Bairoch A, Ravier F, Pasquali C, Sanchez JC, Tissot JD, Bjellqvist B, Vargas R (1993). “Human liver protein map: a reference database established by microsequencing and gel comparison”. Electrophoresis. 13 (12): 992–1001. doi:10.1002/elps.11501301201. PMID 1286669.
  • Kaul SC, Wadhwa R, Matsuda Y, Hensler PJ, Pereira-Smith OM, Komatsu Y, Mitsui Y (1995). “Mouse and human chromosomal assignments of mortalin, a novel member of the murine hsp70 family of proteins”. FEBS Lett. 361 (2–3): 269–72. doi:10.1016/0014-5793(95)00177-B. PMID 7698336.
  • Bhattacharyya T, Karnezis AN, Murphy SP, Hoang T, Freeman BC, Phillips B, Morimoto RI (1995). “Cloning and subcellular localization of human mitochondrial hsp70”. J. Biol. Chem. 270 (4): 1705–10. doi:10.1074/jbc.270.4.1705. PMID 7829505.
  • Furlini G, Vignoli M, Re MC, Gibellini D, Ramazzotti E, Zauli G, La Placa M (1994). “Human immunodeficiency virus type 1 interaction with the membrane of CD4+ cells induces the synthesis and nuclear translocation of 70K heat shock protein”. J. Gen. Virol. 75 (1): 193–9. doi:10.1099/0022-1317-75-1-193. PMID 7906708.
  • Matoba R, Okubo K, Hori N, Fukushima A, Matsubara K (1994). “The addition of 5′-coding information to a 3′-directed cDNA library improves analysis of gene expression”. Gene. 146 (2): 199–207. doi:10.1016/0378-1119(94)90293-3. PMID 8076819.
  • Maruyama K, Sugano S (1994). “Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides”. Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298.
  • Hughes GJ, Frutiger S, Paquet N, Pasquali C, Sanchez JC, Tissot JD, Bairoch A, Appel RD, Hochstrasser DF (1994). “Human liver protein map: update 1993”. Electrophoresis. 14 (11): 1216–22. doi:10.1002/elps.11501401181. PMID 8313870.
  • Ji H, Reid GE, Moritz RL, Eddes JS, Burgess AW, Simpson RJ (1997). “A two-dimensional gel database of human colon carcinoma proteins”. Electrophoresis. 18 (3–4): 605–13. doi:10.1002/elps.1150180344. PMID 9150948.
  • Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, Suyama A, Sugano S (1997). “Construction and characterization of a full length-enriched and a 5′-end-enriched cDNA library”. Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID 9373149.
  • Mizukoshi E, Suzuki M, Loupatov A, Uruno T, Hayashi H, Misono T, Kaul SC, Wadhwa R, Imamura T (1999). “Fibroblast growth factor-1 interacts with the glucose-regulated protein GRP75/mortalin”. Biochem. J. 343 Pt 2 (2): 461–6. doi:10.1042/0264-6021:3430461. PMC 1220575. PMID 10510314.
  • O’Keeffe B, Fong Y, Chen D, Zhou S, Zhou Q (2000). “Requirement for a kinase-specific chaperone pathway in the production of a Cdk9/cyclin T1 heterodimer responsible for P-TEFb-mediated tat stimulation of HIV-1 transcription”. J. Biol. Chem. 275 (1): 279–87. doi:10.1074/jbc.275.1.279. PMID 10617616.
  • Kaula SC, Reddelb RR, Sugiharac T, Mitsuia Y, Wadhwac R (2000). “Inactivation of p53 and life span extension of human diploid fibroblasts by mot-2”. FEBS Lett. 474 (2–3): 159–64. doi:10.1016/S0014-5793(00)01594-5. PMID 10838077.
  • Agostini I, Popov S, Li J, Dubrovsky L, Hao T, Bukrinsky M (2000). “Heat-shock protein 70 can replace viral protein R of HIV-1 during nuclear import of the viral preintegration complex”. Exp. Cell Res. 259 (2): 398–403. doi:10.1006/excr.2000.4992. PMID 10964507.
  • Xie H, Hu Z, Chyna B, Horrigan SK, Westbrook CA (2001). “Human mortalin (HSPA9): a candidate for the myeloid leukemia tumor suppressor gene on 5q31”. Leukemia. 14 (12): 2128–34. doi:10.1038/sj.leu.2401935. PMID 11187902.
  • Andersen JS, Lyon CE, Fox AH, Leung AK, Lam YW, Steen H, Mann M, Lamond AI (2002). “Directed proteomic analysis of the human nucleolus”. Curr. Biol. 12 (1): 1–11. doi:10.1016/S0960-9822(01)00650-9. PMID 11790298.
  • Carette J, Lehnert S, Chow TY (2002). “Implication of PBP74/mortalin/GRP75 in the radio-adaptive response”. Int. J. Radiat. Biol. 78 (3): 183–90. doi:10.1080/09553000110097208. PMID 11869473.
  • Wadhwa R, Yaguchi T, Hasan MK, Mitsui Y, Reddel RR, Kaul SC (2002). “Hsp70 family member, mot-2/mthsp70/GRP75, binds to the cytoplasmic sequestration domain of the p53 protein”. Exp. Cell Res. 274 (2): 246–53. doi:10.1006/excr.2002.5468. PMID 11900485.
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