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The DNA sequence containing the gene coding for 19-457aa of human chromogranin-A/CHGA was used to express recombinant CHGA protein in E.coli cells. The recombinant CHGA protein was fused with a 6xHis-tag at the N-terminus for purification. According to the SDS-PAGE analysis, a molecular mass band of about 51-65 kDa of the CHGA protein was visualized on the gel. The purity of this CHGA protein is greater than 90%. Apart from being as an immunogen for antibody generation, this recombinant protein also may be used in the CHGA-associated cancer studies. CHGA is a member of the granin family of neuroendocrine secretory proteins located in the secretory vesicles of neurons and endocrine cells. Its main function is in the granulogenesis of vesicle formation. CHGA acting as the precursor synthesizes many functional peptides such as catestatin, vasostatin, and parastatin. CHGA is often secreted by neuroendocrine tumors (NETs), and measurement of serum CHGA is a sensitive and effective noninvasive laboratory test for the clinical detection and management of NETs if other non-NET physiological, pathological, and pharmacological causes are excluded or considered in the interpretation.
The DNA sequence containing the gene coding for 19-457aa of human chromogranin-A/CHGA was used to express recombinant CHGA protein in E.coli cells. The recombinant CHGA protein was fused with a 6xHis-tag at the N-terminus for purification. According to the SDS-PAGE analysis, a molecular mass band of about 51-65 kDa of the CHGA protein was visualized on the gel. The purity of this CHGA protein is greater than 90%. Apart from being as an immunogen for antibody generation, this recombinant protein also may be used in the CHGA-associated cancer studies.
CHGA is a member of the granin family of neuroendocrine secretory proteins located in the secretory vesicles of neurons and endocrine cells. Its main function is in the granulogenesis of vesicle formation. CHGA acting as the precursor synthesizes many functional peptides such as catestatin, vasostatin, and parastatin. CHGA is often secreted by neuroendocrine tumors (NETs), and measurement of serum CHGA is a sensitive and effective noninvasive laboratory test for the clinical detection and management of NETs if other non-NET physiological, pathological, and pharmacological causes are excluded or considered in the interpretation.
| Cat.No | ACP04844 | Target Name | CHGA |
|---|---|---|---|
| Form | Liquid or Lyophilized powder | Expression System | E.coli |
| Expression Range | 19-457aa | Mol Weight | 52.9kDa |
| Protein Length | Full Length of Mature Protein | Purity | Greater than 90% as determined by SDS-PAGE. |
| Storage Buffer | 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, Liquid form: default storage buffer is Tris/PBS-based buffer, pH 8.0. |
| Target Species | Human | Uniprot ID | P10645 |
|---|
Uniprot Id
P10645
Target Species
Human
Target Name
CHGA
Target Full Name
Chromogranin-A
Target Function
Strongly inhibits glucose induced insulin release from the pancreas.; Inhibits catecholamine release from chromaffin cells and noradrenergic neurons by acting as a non-competitive nicotinic cholinergic antagonist. Displays antibacterial activity against Gram-positive bacteria S.aureus and M.luteus, and Gram-negative bacteria E.coli and P.aeruginosa. Can induce mast cell migration, degranulation and production of cytokines and chemokines. Acts as a potent scavenger of free radicals in vitro. May play a role in the regulation of cardiac function and blood pressure.; Regulates granule biogenesis in endocrine cells by up-regulating the transcription of protease nexin 1 (SERPINE2) via a cAMP-PKA-SP1 pathway. This leads to inhibition of granule protein degradation in the Golgi complex which in turn promotes granule formation.
Target Subcellular Location
[Serpinin]: Secreted. Cytoplasmic vesicle, secretory vesicle.; Cytoplasmic vesicle, secretory vesicle. Cytoplasmic vesicle, secretory vesicle, neuronal dense core vesicle. Secreted.
Target Protein Families
Chromogranin/secretogranin protein family
Target Tissue Specificity
GE-25 is found in the brain.
Target Research Area
Cancer
Target Synonyms
beta Granin; betagranin (N-terminal fragment of chromogranin A); catestatin; CgA; CHG A; Chga; chromofungin; Chromogranin A; Chromogranin A parathyroid secretory protein 1; Chromogranin A precursor; ChromograninA; CMGA_HUMAN; ER-37; Pancreastatin; Parastatin; Parathyroid secretory protein 1; Pituitary secretory protein I; Secretory protein I; SP I; SP-I; SP1; SPI; vasostatin 2; Vasostatin; Vasostatin I; Vasostatin II; vasostatin-2
Target Background
The protein encoded by this gene is a member of the chromogranin/secretogranin family of neuroendocrine secretory proteins. It is found in secretory vesicles of neurons and endocrine cells. This gene product is a precursor to three biologically active peptides; vasostatin, pancreastatin, and parastatin. These peptides act as autocrine or paracrine negative modulators of the neuroendocrine system. Two other peptides, catestatin and chromofungin, have antimicrobial activity and antifungal activity, respectively. Two transcript variants encoding different isoforms have been found for this gene.
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