PA1-020 detects FK506 binding protein 51 kDa (FKBP51) in canine, hamster, human, mouse and rat tissues.
PA1-020 has been successfully used in Western blot procedures. By Western blot, this antibody detects an ~51 kDa protein representing FKBP51 in HeLa cell lysate. By Western blot PA1-020 also detects FKBP51 in whole tissue extracts from rat kidney and rat and mouse testes.
The PA1-020 immunogen is a synthetic peptide corresponding to the residues C(394) Q K K A K E H N E R D R R(407) of human FKBP51. There is a single amino acid substitution (K396 to R396) in this domain between human and mouse FKBP51 protein. PA1-020 immunizing peptide (Cat. # PEP-078) is available for use in neutralization and control experiments.
Immunophilins are a family of soluble cytosolic receptors capable of binding to one of two major immunosuppressant agents - cyclosporin A (CsA) or FK506. Proteins that bind FK506 are termed FK506 Binding Proteins (FKBPs) and those that bind cyclosporin A are called cyclophilins (CyP). Both CyP:CsA and FKBP:FK506 complexes have been shown to inhibit calcineurin, a calcium and calmodulin dependent protein phosphatase which has been implicated as an important signaling enzyme in T-cell activation, providing a possible mechanism of immunosuppression by CsA and FK506. Immunophilins function as peptidyl prolyl cis-trans-isomerases (PPIase) whose activity is inhibited by their respective immunosuppressant compounds. As PPIase's, immunophilins accelerate folding of some proteins both in vivo and in vitro by catalyzing slow steps in the initial folding and rearrangement of proline containing proteins.
FK506 binding protein 51 kDa (FKBP51) is found associated with the progesterone receptor. This protein is also referred to as FKBP54 in the literature. 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.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: 51 kDa FK506-binding protein; 51 kDa FKBP; 54 kDa progesterone recepto; 54 kDa progesterone receptor-associated immunophilin; Androgen-regulated protein 6; EC 184.108.40.206; FF1 antigen; FK506 binding protein 5; FK506 Binding Protein 51; FK506-binding protein 5; FKBP-5; FKBP-51; FKBP54; HSP90-binding immunophilin; p54; Peptidyl-prolyl cis-trans isomerase FKBP5; peptidylprolyl cis-trans isomerase; PPIase FKBP5; Rotamase; T-cell FK506-binding protein
Gene Aliases: AIG6; D17Ertd592e; Dit1; FKBP-5; FKBP5; FKBP51; FKBP54; P54; PPIase; Ptg-10