InnateDB: Systems Biology of the Innate Immune Response

Mus musculus Protein: Oas1a

Summary

InnateDB Protein

IDBP-196678.6

Last Modified

2014-10-13 [Report errors or provide feedback]

Gene Symbol

Oas1a

Protein Name

2'-5' oligoadenylate synthetase 1A

Synonyms

Species

Mus musculus

Ensembl Protein

ENSMUSP00000079198

InnateDB Gene

IDBG-196676 (Oas1a)

Protein Structure

UniProt Annotation

Function

Interferon-induced, dsRNA-activated antiviral enzyme which plays a critical role in cellular innate antiviral response. In addition, it may also play a role in other cellular processes such as apoptosis, cell growth, differentiation and gene regulation. Synthesizes higher oligomers of 2'-5'-oligoadenylates (2-5A) from ATP which then bind to the inactive monomeric form of ribonuclease L (RNase L) leading to its dimerization and subsequent activation. Activation of RNase L leads to degradation of cellular as well as viral RNA, resulting in the inhibition of protein synthesis, thus terminating viral replication. Can mediate the antiviral effect via the classical RNase L-dependent pathway or an alternative antiviral pathway independent of RNase L. {ECO:0000269PubMed:12396720}.

Subcellular Localization

Cytoplasm {ECO:0000250}. Mitochondrion {ECO:0000250}. Nucleus {ECO:0000250}. Microsome {ECO:0000250}. Endoplasmic reticulum {ECO:0000250}. Note=Associated with different subcellular fractions such as mitochondrial, nuclear, and rough/smooth microsomal fractions. {ECO:0000250}.

Disease Associations

Tissue Specificity

Expressed at high levels in the digestive tract and lymphoid organs. {ECO:0000269PubMed:12396720}.

Comments

Interactions

Number of Interactions

This gene and/or its encoded proteins are associated with 2 experimentally validated interaction(s) in this database.

Experimentally validated
Total	2 [view]
Protein-Protein	1 [view]
Protein-DNA	1 [view]
Protein-RNA	0
DNA-DNA	0
RNA-RNA	0
DNA-RNA	0

Gene Ontology

Molecular Function

Accession	GO Term
GO:0001730	2'-5'-oligoadenylate synthetase activity
GO:0003723	RNA binding
GO:0003725	double-stranded RNA binding
GO:0005524	ATP binding
GO:0016740	transferase activity
GO:0016779	nucleotidyltransferase activity
GO:0046872	metal ion binding

Biological Process

GO:0006164	purine nucleotide biosynthetic process
GO:0006955	immune response
GO:0009615	response to virus
GO:0045087	innate immune response (InnateDB)
GO:0051607	defense response to virus

Cellular Component

GO:0005634	nucleus
GO:0005739	mitochondrion
GO:0005783	endoplasmic reticulum

Protein Structure and Domains

PDB ID

MGI:2180860

InterPro

IPR002934 Nucleotidyl transferase domain
IPR006116 2-5-oligoadenylate synthetase, N-terminal
IPR018952 2\'-5\'-oligoadenylate synthetase 1, domain 2/C-terminal

PFAM

PF01909
PF10421

PRINTS

PIRSF

SMART

TIGRFAMs

Post-translational Modifications

Modification

Cross-References

SwissProt

P11928

PhosphoSite