Human SerpinA6 / CBG Protein (His Tag)

CBG

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Catalog Number	P10998-H08H
Organism Species	Human
Host	Human Cells
Synonyms	CBG
Molecular Weight	The secreted recombinant human SERPINA6 consists of 394 amino acids and predictes a molecular mass of 44 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of the protein is approximately 55-60 kDa due to glycosylation.
predicted N	Met 23
SDS-PAGE
Purity	> 98 % as determined by SDS-PAGE
Protein Construction	A DNA sequence encoding the human SERPINA6 (NP_001747.2) precursor (Met 1-Val 405) was fused with a polyhistidine tag at the C-terminus.
Bio-activity
Research Area	Immunology |Inflammation / Inflammatory Mediator |Plasma Cascade Systems in Inflammation |Fibrinolysis System
Formulation	Lyophilized from sterile PBS, pH 7.4 1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
Background	Corticosteroid-binding globulin (CBG), also known as SerpinA6, is a non-inhibitory member of the serine proteinase inhibitor (serpin) superfamily. It is the high-affinity transport protein for glucocorticoids in vertebrate blood. CBG is specifically cleaved by this protease at a precise site close to its carboxy-terminus. This induces a conformation change and disrupts the binding between glucocorticoids and CBG, and promotes a significant and local release of glucocorticoids (over 90% of them are bound to CBG in human plasma). In this context, CBG directs glucocorticoids to sites of inflammation, and plays in consequence a crucial role in efficient glucocorticoid action in physiology. The SerpinA6 protein is mainly secreted by the liver. This negative acute phase protein regulates free cortisol levels in the blood and distributes cortisol to its target tissues. SerpinA6 deficiency is an extremely rare hereditary disorder characterized by reduced corticosteroid-binding capacity with normal or low plasma corticosteroid-binding globulin concentration, and normal or low basal cortisol levels associated with hypo-/hypertension and muscle fatigue. There are three heritable, human CBG gene mutations that can reduce CBG-cortisol binding affinity and/or reduce circulating CBG levels.
Reference	Seralini GE. (1991) A new role for corticosteroid binding globulin (CBG), member of SERPIN superfamily. C R Seances Soc Biol Fil. 185(6): 500-9. Buss C, et al. (2007) Haploinsufficiency of the SERPINA6 gene is associated with severe muscle fatigue: A de novo mutation in corticosteroid-binding globulin deficiency. J Neural Transm. 114(5): 563-9. Torpy DJ, et al. (2007) Corticosteroid-binding globulin gene polymorphisms: clinical implications and links to idiopathic chronic fatigue disorders. Clin Endocrinol (Oxf). 67(2): 161-7. Braun BC, et al. (2010) Effect of mutations of the human serpin protein corticosteroid-binding globulin on cortisol-binding, thermal and protease sensitivity. J Steroid Biochem Mol Biol. 120(1): 30-7. Lin HY, et al. (2010) Molecular and structural basis of steroid hormone binding and release from corticosteroid-binding globulin. Mol Cell Endocrinol. 316(1): 3-12.