Storage Buffer | PBS, 50% glycerol, 0.09% sodium azide *Storage buffer may change when conjugated |
Storage Temperature | -20ºC, Conjugated antibodies should be stored according to the product label |
Shipping Temperature | Blue Ice or 4ºC |
Purification | Protein G Purified |
Clonality | Monoclonal |
Clone Number | 8A7 |
Isotype | IgG1 Kappa |
Specificity | Detects ~25kDa or ~27kDa. Recognizes HSP25 and HSP27, cross reacts with alpha B crystallin. |
Cite This Product | StressMarq Biosciences Cat# SMC-114, RRID: AB_2120775 |
Certificate of Analysis | A 1:5000 dilution of SMC-114 was sufficient for detection of HSP27 in 20 µg of HeLa cell lysate by ECL immunoblot analysis. |
Alternative Names | HSPB1 Antibody, Heat shock protein beta-1 Antibody, HSPB1 Antibody, DMPK-binding protein Antibody, MKBP Antibody |
Research Areas | Actin, Actin Assembly, Atherosclerosis, Cancer, Cardiovascular System, Cell Signaling, Chaperone Proteins, Contractility, Cytoskeleton, Heart, Heat Shock, Microfilaments, Microtubules, Protein Trafficking, Tumor Biomarkers |
Cellular Localization | Cytoplasm, Cytoskeleton, Nucleus, Spindle |
Accession Number | NP_001532.1 |
Gene ID | 3315 |
Swiss Prot | P04792 |
Scientific Background | HSP25 is the mouse homologue of the human HSP27 protein, a member of the small heat shock protein family comprised of a diverse group of proteins from ~15 to >30kDa(1). The basic structure of most sHSPs is a homologous and highly conserved amino acid sequence, with an α-crystallin-domain at the C-terminus and the WD/EPF domain at the less conserved N-terminus. This N-terminus is essential for the development of high molecular oligomers (2, 3). HSP27-oligomers consist of stable dimers formed by as many as 8-40 HSP27 protein monomers (4). The oligomerization status is connected with the chaperone activity: aggregates of large oligomers have high chaperone activity, whereas dimers have no chaperone activity (5). HSP27 is localized to the cytoplasm of unstressed cells but can redistribute to the nucleus in response to stress, where it may function to stabilize DNA and/or the nuclear membrane. It can be rapidly phosphorylated in response to physiological stimuli relevant to the cell type examined. Thus, HSP27 has been suggested to be an important intermediate in second messenger-mediated signaling pathways (6). Other functions include chaperone activity (as mentioned above), thermo-tolerance in vivo, inhibition of apoptosis, and signal transduction. Specifically, in vitro, it acts as an ATP-independent chaperone by inhibiting protein aggregation and by stabilizing partially denatured proteins, which ensures refolding of the HSP70 complex. HSP27 is also involved in the apoptotic signaling pathway because it interferes with the activation of cytochrome c/Apaf-1/dATP complex, thereby inhibiting the activation of procaspase-9. It is also hypothesized that HSP27 may serve some role in cross-bridge formation between actin and myosin (7). And finally, HSP27 is also thought to be involved in the process of cell differentiation. The up-regulation of HSP27 correlates with the rate of phosphorylation and with an increase of large oligomers. It is possible that HSP27 may play a crucial role in termination of growth (8). For more information visit our HSP27 Scientific Resource Guide at http://www.HSP27.com. |
References |
1. Welch W.J. (1985) J Biol. Chem. 260: 3058-3062. 2. Kim K.K., Kim R., and Kim S. (1998) Nature 394(6693): 595-599. 3. Van Montfort R., Slingsby C., and Vierling E. (2001) Addv Protein Chem. 59: 105-56. 4. Ehrnsperger M., Graber S., Gaestel M. and Buchner J. (1997) EMBO J. 16: 221-229. 5. Ciocca D.R., Oesterreich S., Chamness G.C., McGuire W.L., and Fugua S.A. (1993) J Natl Cancer Inst. 85 (19): 1558-70. 6. Welsh M.J., Wu W., Parvinem M., and Gilmont R.R. (1996) Biol. Of Reprod. 55: 141-151. 7. Sarto C. Binnz P.A. and Mocarelli P. (2000) Electrophoresis. 21(6): 1218-26. 8. Arrigo A.P. (2005) J Cell Biochem. 94(2): 241-6. 9. Jia, Y. et al. (2001) J. Biol. Chem. 276(43):39911-39918. |
Immunohistochemistry analysis using Mouse Anti-Hsp27 Monoclonal Antibody, Clone 8A7 (SMC-114). Tissue: embryo somites. Species: Rat. Primary Antibody: Mouse Anti-Hsp27 Monoclonal Antibody (SMC-114) at 1:1000. Secondary Antibody: FITC Goat Anti-Mouse (green). Counterstain: Rhodamine-phalloidin labeled actin (red). Investigation at 11 days gestation. Courtesy of: Mike Welsh, Umich.
Immunohistochemistry analysis using Mouse Anti-Hsp27 Monoclonal Antibody, Clone 8A7 (SMC-114). Tissue: colon carcinoma. Species: Human. Fixation: Formalin. Primary Antibody: Mouse Anti-Hsp27 Monoclonal Antibody (SMC-114) at 1:5000 for 12 hours at 4°C. Secondary Antibody: Biotin Goat Anti-Mouse at 1:2000 for 1 hour at RT. Counterstain: Mayer Hematoxylin (purple/blue) nuclear stain at 200 µl for 2 minutes at RT. Localization: Inflammatory cells. Magnification: 40x.
Immunohistochemistry analysis using Mouse Anti-Hsp27 Monoclonal Antibody, Clone 8A7 (SMC-114). Tissue: backskin. Species: Mouse. Fixation: Bouin’s Fixative and paraffin-embedded. Primary Antibody: Mouse Anti-Hsp27 Monoclonal Antibody (SMC-114) at 1:100 for 1 hour at RT. Secondary Antibody: FITC Goat Anti-Mouse (green) at 1:50 for 1 hour at RT. Localization: Epidermis.
Western Blot analysis of Rat Lung tissue lysates showing detection of Hsp27 protein using Mouse Anti-Hsp27 Monoclonal Antibody, Clone 8A7 (SMC-114). Load: 15 µg. Block: 5% blocking solution. Primary Antibody: Mouse Anti-Hsp27 Monoclonal Antibody (SMC-114) at 1:1000 for 2 hours at RT. Secondary Antibody: Goat Anti-Mouse: HRP for 1 hour at RT.
Immunohistochemistry analysis using Mouse Anti-Hsp27 Monoclonal Antibody, Clone 8A7 (SMC-114). Tissue: backskin. Species: Mouse. Fixation: Bouin’s Fixative and paraffin-embedded. Primary Antibody: Mouse Anti-Hsp27 Monoclonal Antibody (SMC-114) at 1:100 for 1 hour at RT. Secondary Antibody: FITC Goat Anti-Mouse (green) at 1:50 for 1 hour at RT. Localization: Epidermis.
StressMarq Biosciences :
Based on validation through cited publications.