SERPINA1

Gene Information
 
Gene Symbol
SERPINA1
 
Aliases
A1A, A1AT, AAT, PI, PI1, PRO2275, alpha1AT, nNIF
 
Entrez Gene ID
 
Gene Name
Serpin family A member 1
 
Chromosomal Location
14q32.13
 
HGNC ID
 
Summary
The protein encoded by this gene is secreted and is a serine protease inhibitor whose targets include elastase, plasmin, thrombin, trypsin, chymotrypsin, and plasminogen activator. Defects in this gene can cause emphysema or liver disease. Several transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]
 
RefSeq DNA
 
RefSeq mRNA
  e!Ensembl
Gene
Transcript  
Protein

Gene Ontology (GO)

GO ID Ontology Function Evidence Reference
GO:0010951 Biological process Negative regulation of endopeptidase activity IBA 21873635
GO:0005576 Cellular component Extracellular region NAS 14718574
GO:0005615 Cellular component Extracellular space HDA 16502470, 23580065
GO:0005615 Cellular component Extracellular space IBA 21873635
GO:0005615 Cellular component Extracellular space IDA 6980881, 25645918
Protein Information
 
Protein Name
Alpha-1-antitrypsin, alpha-1 antitrypsin, alpha-1 protease inhibitor, alpha-1-antiproteinase, alpha-1-antitrypsin null, alpha-1-antitrypsin short transcript variant 1C4, alpha-1-antitrypsin short transcript variant 1C5, epididymis secretory sperm binding protein, protease inhibitor 1 (anti-elastase), alpha-1-antitrypsin, serine (or cysteine) proteinase inhibitor, clade A, member 1, serpin A1, serpin peptidase inhibitor clade A (alpha-1antiproteinase, antitrypsin) member 1, serpin peptidase inhibitor clade A member 1, serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 1
 
Function
Inhibitor of serine proteases. Its primary target is elastase, but it also has a moderate affinity for plasmin and thrombin. Irreversibly inhibits trypsin, chymotrypsin and plasminogen activator. The aberrant form inhibits insulin-induced NO synthesis in platelets, decreases coagulation time and has proteolytic activity against insulin and plasmin.; [Short peptide from AAT]: reversible chymotrypsin inhibitor. It also inhibits elastase, but not trypsin. Its major physiological function is the protection of the lower respiratory tract against proteolytic destruction by human leukocyte elastase (HLE)
 
Refseq Proteins
 
UniProt
 
PDB
Pathways
 
KEGG
 
Reactome
 

Complement and coagulation cascades

 

Platelet degranulation
COPII-mediated vesicle transport
Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs)
Cargo concentration in the ER
Neutrophil degranulation
Post-translational protein phosphorylation

Interactions
 
STRING MINT IntAct
ENSP00000311127 P49765
    View interactions
     

Associated Diseases

Disease groupDisease NameReferences
Cardiovascular Diseases
Vasculitis
Arteriosclerosis
Congenital, Hereditary, and Neonatal Diseases and Abnormalities
alpha 1-Antitrypsin Deficiency
Genetic Diseases
Fragile X Syndrome
References
 
 
PubMed ID Associated gene/s Associated condition Genetic Mutation Diagnostic Criteria Association with PCOS Ethnicity Conclusion
CK-9, A1AT, CK-1, APOA-1, ATTR, DBP, HP, DRAM2, APOA-4, IL12-A, SIRT2, FGG, FGB, ZAG, RBP, A1BG, GLUT4, TF, SPTLC2, MAK 
PCOS, increased risk of insulin resistance, abnormal glucose metabolism, type II diabetes, abnormal lipid metabolism, hyperinsulinemia 
 
Rotterdam consensus criteria 
Related 
30 PCOS and 30 normal 
Thirty-two protein spots were shown to be significantly differentially expressed between PCOS and normal follicular fluids, of which 20 unique proteins were identified to be associated with cellular metabolism and physiological processes; 13 of these proteins were upregulated while seven were downregulated in PCOS follicular fluids. Semiquantitative reverse transcription-polymerase chain reaction (RTPCR) analyses revealed that mRNA levels of serine palmitoyltransferase 2, serine/threonine-protein kinase male germ cell-associated kinase (MAK) and DNA damage-regulated autophagy modulator protein 2 decreased significantly in granulosa cells of PCOS patients compared with normal samples. 

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