• Featured Product
  • KD/KO Validated

STAT1 Monoclonal antibody

STAT1 Monoclonal Antibody for IF, IHC, WB, ELISA

Host / Isotype

Mouse / IgG2a


Human, rat, mouse and More (2)







Cat no : 66545-1-Ig



Tested Applications

Positive WB detected inLNCaP cells, HEK-293 cells, NIH/3T3 cells, HeLa cells, MCF-7 cells, Jurkat cells, HSC-T6 cells
Positive IHC detected inhuman ovary tumor tissue, human tonsillitis 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 inIFN alpha treated HeLa cells, HEK-293 cells

Recommended dilution

Western Blot (WB)WB : 1:5000-1:50000
Immunohistochemistry (IHC)IHC : 1:200-1:800
Immunofluorescence (IF)IF : 1:200-1:800
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

66545-1-Ig targets STAT1 in WB, IP, IHC, IF, CoIP, ELISA applications and shows reactivity with Human, rat, mouse samples.

Tested Reactivity Human, rat, mouse
Cited Reactivityhuman, mouse, pig
Host / Isotype Mouse / IgG2a
Class Monoclonal
Type Antibody
Immunogen STAT1 fusion protein Ag0199
Full Name signal transducer and activator of transcription 1, 91kDa
Calculated molecular weight 83 kDa
Observed molecular weight 84 kDa
GenBank accession numberBC002704
Gene symbol STAT1
Gene ID (NCBI) 6772
Conjugate Unconjugated
Form Liquid
Purification Method Protein A 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

What is the molecular weight of STAT1? Are there any isoforms of STAT1? Is STAT1 post-translationally modified?

The molecular weight of STAT1 is 91 kDa for full-length STAT1α and 84 kDa for STAT1β, which is devoid of the C-terminal activation domain (PMID: 1502203). Phosphorylation of STAT1 regulates STAT1 activity. Phosphorylation of Tyr701 by Janus kinases (JAKs) triggers STAT1 homo- and hetero-dimerization with other STAT family members and also causes nuclear translocation, while phosphorylation of Ser727 is needed for full activation (PMID: 10851062). STAT1β lacks Ser727 and has therefore been considered to be inactive or acting in a dominant negative manner to STAT1α, although it has been further shown to be capable of transcription activation in vivo (PMID: 24710278).

 What is the subcellular localization of STAT1?

STAT1 is present in the cytoplasm and in the nucleus. Translocation of STAT1 from the cytoplasm to the nucleus is required for its regulation of gene expression and is dependent on phosphorylation (see above). However, low levels of unphosphorylated STAT1, often referred to as U-STAT1, can also be found in the nucleus, where U-STAT1 regulates the stability of heterochromatin by binding to chromatin in monomeric or dimeric states (PMID: 18840523).

 What is the tissue expression pattern of STAT1?

STAT1 is ubiquitously expressed.


Product Specific Protocols
WB protocol for STAT1 antibody 66545-1-IgDownload protocol
IHC protocol for STAT1 antibody 66545-1-IgDownload protocol
IF protocol for STAT1 antibody 66545-1-IgDownload protocol
Standard Protocols
Click here to view our Standard Protocols



ACS Nano

Dual Inhibition of Endoplasmic Reticulum Stress and Oxidation Stress Manipulates the Polarization of Macrophages under Hypoxia to Sensitize Immunotherapy.

Authors - Mengshi Jiang

Int Immunopharmacol

Silencing SIRT1 promotes the anti-HBV action of IFN-α by regulating Pol expression and activating the JAK-STAT signaling pathway

Authors - Qinyan Tang

Biochim Biophys Acta Mol Cell Res

IL-17 promotes melanoma through TRAF2 as a scaffold protein recruiting PIAS2 and ELAVL1 to induce EPHA5

Authors - Junfeng Du
  • KD Validated

PLoS Negl Trop Dis

Comparative proteomics reveals Cryptosporidium parvum manipulation of the host cell molecular expression and immune response

Authors - Teng LiI


Statins attenuate antiviral IFN-β and ISG expression via inhibition of IRF3 and JAK/STAT signaling in poly(I:C)-treated hyperlipidemic mice and macrophages.

Authors - Atsushi Koike

Chin J Nat Med

Panax notoginseng saponins prevent colitis-associated colorectal cancer via inhibition IDO1 mediated immune regulation.

Authors - Xue-Ming Li