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You are here:Home » Molecular Biology » MB-Binding Proteins » FK506 Binding Protein 12, Recombinant, Human (FKBP12, FK506 BP1A)

FK506 Binding Protein 12, Recombinant, Human (FKBP12, FK506 BP1A)


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Immunophilins are a family of soluble 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). Immunophilins function as cis-trans peptidyl-prolyl isomerases (PPIase) whose activity is inhibited by their respective immunosuppressant compounds. Thus, 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.
Catalog #F4150-31A
FKBP12FK506 complexes inhibit calcineurin, a calcium/calmodulin-dependent serine/threonine phosphatase which blocks T-cell activation by preventing lymphokine gene transcription. FKBP12 also plays a role in intracellular calcium regulation by associating with three types of calcium release channel complexes, cardiac and skeletal ryanodine receptors and the inositol 1,4,5-trisphosphate receptor. In interactions with members of the TGF beta family type I receptors, FKBP12 has been shown to exert an inhibitory effect on the signaling pathway.
Human FKBP12 (FK506 binding protein 1A, transcript variant 12A) (GenBank Accession No. NM_054014), (full length) with N-terminal His tag, expressed in a Baculovirus infected Sf9 cell expression system.
ApplicationsSuitable for use in testing rapamycin inhibition of mTOR. Other applications not tested.
Recommended DilutionOptimal dilutions to be determined by the researcher.
Storage and StabilityAliquot to avoid repeated freezing and thawing and store at -70°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Aliquots are stable for at least 6 months.
Molecular Weight13.1kD
SourceHuman, recombinant, produced in E. coli
ConcentrationAs reported
FormSupplied as a liquid in 50mM Tris-HCl, pH 7.5, 150mM sodium chloride, 0.25mM DTT, 0.1mM EGTA, 0.1mM EDTA, 0.1mM PMSF and 50% glycerol.
Important NoteThis 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.

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