NP_000792.1
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NCBI GenBank Nucleotide #
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UniProt Primary Accession #
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UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
11,951 Da
NCBI Official Full Name
peptidyl-prolyl cis-trans isomerase FKBP1A isoform a
NCBI Official Synonym Full Names
FK506 binding protein 1A, 12kDa
NCBI Official Synonym Symbols
FKBP1; PKC12; PKCI2; FKBP12; PPIASE; FKBP-12; FKBP-1A [Similar Products]
NCBI Protein Information
peptidyl-prolyl cis-trans isomerase FKBP1A; rotamase; 12 kDa FKBP; calstabin 1; calstabin-1; FKBP12-Exip3; PPIase FKBP1A; immunophilin FKBP12; FK506 binding protein12; FK506-binding protein 1; FK506-binding protein 12; 12 kDa FK506-binding protein; protein kinase C inhibitor 2; FK506-binding protein 1A (12kD); FK506-binding protein, T-cell, 12-kD
UniProt Protein Name
Peptidyl-prolyl cis-trans isomerase FKBP1A
UniProt Synonym Protein Names
12 kDa FK506-binding protein; 12 kDa FKBP; FKBP-12; Calstabin-1; FK506-binding protein 1A; FKBP-1A; Immunophilin FKBP12; Rotamase
UniProt Synonym Gene Names
UniProt Entry Name
FKB1A_HUMAN
NCBI Summary for FKBP1A
The protein encoded by this gene is a member of the immunophilin protein family, which play a role in immunoregulation and basic cellular processes involving protein folding and trafficking. The protein is a cis-trans prolyl isomerase that binds the immunosuppressants FK506 and rapamycin. It interacts with several intracellular signal transduction proteins including type I TGF-beta receptor. It also interacts with multiple intracellular calcium release channels, and coordinates multi-protein complex formation of the tetrameric skeletal muscle ryanodine receptor. In mouse, deletion of this homologous gene causes congenital heart disorder known as noncompaction of left ventricular myocardium. Multiple alternatively spliced variants, encoding the same protein, have been identified. The human genome contains five pseudogenes related to this gene, at least one of which is transcribed. [provided by RefSeq, Sep 2008]
UniProt Comments for FKBP1A
FKBP12: an immunophilin and peptidyl-prolyl cis-trans isomerase that binds to the immunosuppressant drugs FK506 (a.k.a. tacrolimus or Fujimycin) and rapamycin (a.k.a. Sirolimus). The FKBP12/rapamycin complex binds NFAT transcription factors and inhibits the induction of T cell genes including IL-2, IL-3, IL-4, TNF-alpha and GM-CSF. FK506 is used in treating patients after organ transplant and those suffering from autoimmune disorders. The immunosuppressant activity of FKBP12 is not apparently related to its prolyl isomerase activity. The FKBP12/rapamycin complex inhibits the mammalian target of rapamycin (mTOR) pathway by directly binding the mTOR Complex1 (mTORC1). mTORC1 contains Raptor, mLST8, and PRAS40, and interacts with DEPTOR, which inhibits its activity. mTOR, a S/T protein kinase, is a central regulator of cellular growth and metabolism. Its inhibition enhances the dependence on aerobic glycolysis in leukemic cells.
Protein type: EC 5.2.1.8; Isomerase
Chromosomal Location of Human Ortholog: 20p13
Cellular Component: endoplasmic reticulum membrane; sarcoplasmic reticulum membrane; membrane; cytoplasm; nerve terminal; Z disc; cytosol
Molecular Function: protein binding; signal transducer activity; FK506 binding; enzyme binding; protein homodimerization activity; peptidyl-prolyl cis-trans isomerase activity; activin binding; macrolide binding; Hsp70 protein binding; calcium channel inhibitor activity; SMAD binding; transforming growth factor beta receptor binding
Biological Process: heart morphogenesis; protein maturation via protein folding; protein peptidyl-prolyl isomerization; protein folding; positive regulation of protein binding; T cell activation; response to caffeine; T cell proliferation; regulation of protein localization; negative regulation of protein amino acid phosphorylation; muscle contraction; negative regulation of release of sequestered calcium ion into cytosol; transforming growth factor beta receptor signaling pathway; fibril organization and biogenesis; ventricular cardiac muscle morphogenesis; protein refolding; response to iron ion; regulation of immune response; positive regulation of I-kappaB kinase/NF-kappaB cascade; cytokine and chemokine mediated signaling pathway; regulation of activin receptor signaling pathway; SMAD protein complex assembly; negative regulation of protein phosphatase type 2B activity; 'de novo' protein folding; positive regulation of protein ubiquitination; release of sequestered calcium ion into cytosol
Research Articles on FKBP1A
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