| Hsp27s belong to an abundant and ubiquitous family of small heat shock proteins (sHSP). It is an important HSP found in both normal human cells and cancer cells. The basic structure of most sHsps is a homologous and highly conserved amino acid sequence, with an -crystallin- |
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| 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 (1, 2). sp27-oligomers consist of stable dimers formed by as many as 8-40 Hsp27 protein monomers (3). The |
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| oligomerization status is connected with the chaperone activity: aggregates of large oligomers have high chaperone activity, whereas dimers have no chaperone activity (4). HSP27 is localized to the cytoplasm of unstressed cells but can redistribute to the nucleus in response to stress, |
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| where it may function to stabilize DNA and/or the nuclear membrane. Other functions include chaperone activity (as mentioned above), thermotolerance 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 |
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| 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 |
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| cross-bridge formation between actin and myosin (5). 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 (6). |
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| Catalog # | H1830-50E |
| Applications | Suitable for use in ELISA, Western Blot, Immunoprecipitation and Immunohistochemistry. Other applications not tested. |
| Recommended Dilution | Western Blot: 0.25-0.5ug/ml |
| Optimal dilutions to be determined by the researcher. |
| Storage and Stability | May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. |
| CAS Number | n/a |
| Clone Type | Monoclonal |
| Isotype | IgG2B Kappa |
| Clone No | 10F713 |
| Host | Mouse |
| Source | Human |
| Concentration | ~1mg/ml |
| Form | Supplied as a liquid in PBS, pH7.4, in 0.09% sodium azide and 50% glycerol. |
| Purity | Purified by Protein G affinity chromatography. |
| Immunogen | Human Hsp27. |
| Specificity | Recognizes human hsp27. There is no cross-reactivity to alphaB-crystallin. |
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| Important Note | This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological. |
