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  • KD/KO Validated

OAS1/3 Polyclonal antibody

OAS1/3 Polyclonal Antibody for IF, IHC, WB, ELISA

Host / Isotype

Rabbit / IgG


human, mouse and More (2)





Cat no : 14955-1-AP


(2 5)oligo(A) synthase 1, 2 5 oligoadenylate synthase 1, 2 5A synthase 1, E18/E16, IFI 4, OAS1, OAS1/3, OIAS, OIASI, p46/p42 OAS

Tested Applications

Positive WB detected inIFN alpha treated HeLa cells, mouse brain tissue
Positive IHC detected inhuman liver tissue
Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0
Positive IF detected inHeLa cells

Recommended dilution

Western Blot (WB)WB : 1:500-1:2000
Immunohistochemistry (IHC)IHC : 1:100-1:400
Immunofluorescence (IF)IF : 1:50-1:500
It is recommended that this reagent should be titrated in each testing system to obtain optimal results.
Sample-dependent, Check data in validation data gallery.

Product Information

14955-1-AP targets OAS1/3 in WB, IHC, IF, CoIP, ELISA applications and shows reactivity with human, mouse samples.

Tested Reactivity human, mouse
Cited Reactivityhuman, mouse, rat, pig
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen OAS1/3 fusion protein Ag6793
Full Name 2',5'-oligoadenylate synthetase 1, 40/46kDa
Calculated Molecular Weight 46 kDa
Observed Molecular Weight ~40 kDa, 100-120 kDa
GenBank Accession NumberBC000562
Gene Symbol OAS1
Gene ID (NCBI) 4938
Conjugate Unconjugated
Form Liquid
Purification MethodAntigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

The 2-prime,5-prime oligoadenylate synthetases (OASs), such as OAS1, are interferon-induced proteins characterized by their capacity to catalyze the synthesis of 2-prime,5-prime oligomers of adenosine (2-5As). OAS1 (type I enzymes) has some isoforms with the MW of 40, 42, 44, 46, and 48 kDa (PMID:12590567, 19383565). OAS1 is a strong candidate for determining susceptibility or resistance to viral infections(PMID:15732009). This antibody may have cross-reaction with OAS3 protein due to the high homology.


Product Specific Protocols
WB protocol for OAS1/3 antibody 14955-1-APDownload protocol
IHC protocol for OAS1/3 antibody 14955-1-APDownload protocol
IF protocol for OAS1/3 antibody 14955-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols




A prenylated dsRNA sensor protects against severe COVID-19.

Authors - Arthur Wickenhagen
  • KO Validated

Adv Sci (Weinh)

The CRISPR-Cas13a Gene-Editing System Induces Collateral Cleavage of RNA in Glioma Cells.

Authors - Qixue Wang

PLoS Biol

Resurrection of 2'-5'-oligoadenylate synthetase 1 (OAS1) from the ancestor of modern horseshoe bats blocks SARS-CoV-2 replication

Authors - Spyros Lytras


USP19 (ubiquitin specific peptidase 19) promotes TBK1 (TANK-binding kinase 1) degradation via chaperone-mediated autophagy.

Authors - Xibao Zhao

J Invest Dermatol

OAS1, OAS2, and OAS3 Contribute to Epidermal Keratinocyte Proliferation by Regulating Cell Cycle and Augment Type I Interferon-Induced JAK1-STAT1 Phosphorylation in Psoriasis.

Authors - Yan-Zhou Huang
  • KD Validated


A systematic CRISPR screen reveals an IL-20/IL20RA-mediated immune crosstalk to prevent the ovarian cancer metastasis.

Authors - Jia Li


The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Seong (Verified Customer) (11-27-2018)

OAS1 polyclonal antibody (14955-1-AP) did work by Western Blot (1:1,500) of ARPE-19 cells induced with interferon gamma but the band was very weak in uninduced cells.

  • Applications: Western Blot,
  • Primary Antibody Dilution: 1:1,500
  • Cell Tissue Type: human ARPE-19 cells