Transcortin
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Serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 6, also Corticosteroid-Binding Globulin or Transcortin
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| Identifiers | |
| Symbol | SERPINA6 CBG |
| HUGO | 1540 |
| Entrez | 866 |
| OMIM | 122500 |
| RefSeq | NM_001750 |
| UniProt | P08185 |
| Other data | |
| Locus | Chr. 14 q32.1 |
Transcortin, also corticosteroid-binding globulin or CBG, is officially called serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 6.
It is an alpha-globulin.
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[edit] Binding
Transcortin binds several proteins:
- Cortisol. Approximately 75% of the cortisol in circulation is bound to this plasma protein. (The rest is bound to serum albumin.) The cortisol is thought to be biologically active only when it is not bound to transcortin.
- Aldosterone. 60% of the aldosterone in blood is bound to this plasma protein.
[edit] Production
Transcortin is produced by the liver and is regulated by estrogens. Therefore, plasma transcortin levels increase during pregnancy, and are decreased in cirrhosis.
[edit] See also
[edit] External links
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Acyl carrier protein - Adaptor protein - F-box protein - GTP-binding protein - Light-harvesting complex - Membrane transport protein
Calcium-binding protein - Calmodulin-binding proteins - Ceruloplasmin - Cholesterylester transfer protein - Iron-binding proteins - Retinol binding protein - Transferrin receptor - Transcobalamins
Follistatin - Growth hormone binding protein - Insulin-like growth factor binding protein - Neurophysins (Neurophysin I, II)
Sex hormone binding globulin/Androgen binding protein - Transcortin - Thyroxine-binding globulin - Transthyretin
Alpha 1-antichymotrypsin - Alpha 1-antitrypsin - Alpha 2-antiplasmin - Antithrombin - C1-inhibitor - Heat shock protein 47 - Heparin cofactor II - Protein C inhibitor - Plasminogen activator inhibitor-1 - Plasminogen activator inhibitor-2 - Protein Z-related protease inhibitor
noninhibitory: Maspin - Ovalbumin - Thyroxine-binding globulin - Transcortin
