Detects an ~51 kDa protein representing FKBP51 in HeLa cell lysate. Also detects FKBP51 in whole tissue extracts from rat kidney and rat and mouse testes.
Western blot (1: 2000). Other applications not tested. Optimal dilutions are dependent on conditions and should be determined by the user.
Restrictions
For Research Use only
Concentration
1.0 mg/mL
Buffer
PBS containing 50 % glycerol and 0.09 % sodium azide
Preservative
Sodium azide
Precaution of Use
This product contains sodium azide: a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.
Storage
4 °C/-20 °C
Storage Comment
Store the antibody at 2 - 8 °C up to one month or (in aliquots) at -20 °C for longer. Avoidrepeated freezing and thawing. Shelf life: one year from despatch.
Hsp90 is crucial to cellular signaling by its regulation of the folding, activity, and stability of a wide range of client proteins. These client protein complexes may also contain one or more cochaperones (1). One class of Hsp90-binding cochaperone is composed of proteins with a characteristic tetratricopeptide repeat (TPR) domain that forms an Hsp90 binding site. Among the TPR cochaperones of Hsp90 are Hop/Sti1, protein phosphatase PP5, and members of both the FK506- and cyclosporin A-binding families of immunophilins (2). FK506-binding protein 51 (FKBP51) and FKBP52 are large molecular weight immunophilins that are part of the mature glucocorticoid receptor (GR) heterocomplex (3). The N terminal domain of each protein binds FK506 and has peptidyl-prolyl isomerase (PPIase) activity that converts prolyl peptide bonds within target proteins from cis- to trans- proline. The C-terminal domains contain the TPR repeats involved in protein-protein interactions with the Hsp90 (4). Although FKBP52 and FKBP51 share ~75 % sequence similarity, they affect hormone binding by glucocorticoid receptor in opposing manners and have different Hsp90-binding characteristics (3). FK506 binding protein 51 kDa (FKBP51 or otherwise referred to as FKBP54) has been identified as a progestininducible gene. This protein is predominantly expressed in murine T cells but in humans, it is abundantly expressed in numerous tissues at levels many times higher than FKBP12. The FKBP51 gene is known to be induced by glucocorticoids (5).Synonyms: 51 kDa FK506-binding protein, 54 kDa progesterone receptor-associated immunophilin, AIG6, Androgen-regulated protein 6, FF1 antigen, FK506-binding protein 5, FKBP54, HSP90-binding immunophilin, Peptidyl-prolyl cis-trans isomerase FKBP5, Rotamase