Revision 7
Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:

WB, IP, IF-IC, FC-FP, ChIP, ChIP-seq

REACTIVITY:

H M R

SENSITIVITY:

Endogenous

MW (kDa):

84, 91

Source/Isotype:

Rabbit IgG

Product Information

Product Usage Information

For optimal ChIP and ChIP-seq results, use 5 μl of antibody and 10 μg of chromatin (approximately 4 x 106 cells) per IP.

This antibody has been validated using SimpleChIP® Enzymatic Chromatin IP Kits.

Application Dilution
Western Blotting 1:1000
Immunoprecipitation 1:50
Immunofluorescence (Immunocytochemistry) 1:50
Flow Cytometry (Fixed/Permeabilized) 1:50 - 1:200
Chromatin IP 1:100
Chromatin IP-seq 1:100

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

For a carrier free (BSA and azide free) version of this product see product #88211.

Specificity / Sensitivity

Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb recognizes endogenous levels of Stat1 protein only when phosphorylated at Tyr701.

Species Reactivity:

Human, Mouse, Rat

Species predicted to react based on 100% sequence homology

Monkey

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Tyr701 of human Stat1 protein.

Background

The Stat1 transcription factor is activated in response to a large number of ligands (1) and is essential for responsiveness to IFN-α and IFN-γ (2,3). Phosphorylation of Stat1 at Tyr701 induces Stat1 dimerization, nuclear translocation, and DNA binding (4). Stat1 protein exists as a pair of isoforms, Stat1α (91 kDa) and the splice variant Stat1β (84 kDa). In most cells, both isoforms are activated by IFN-α, but only Stat1α is activated by IFN-γ. The inappropriate activation of Stat1 occurs in many tumors (5). In addition to tyrosine phosphorylation, Stat1 is also phosphorylated at Ser727 through a p38 mitogen-activated protein kinase (MAPK)-dependent pathway in response to IFN-α and other cellular stresses (6). Serine phosphorylation may be required for the maximal induction of Stat1-mediated gene activation.

  1. Heim, M.H. (1999) J Recept Signal Transduct Res 19, 75-120.
  2. Durbin, J.E. et al. (1996) Cell 84, 443-50.
  3. Meraz, M.A. et al. (1996) Cell 84, 431-42.
  4. Ihle, J.N. et al. (1994) Trends Biochem Sci 19, 222-7.
  5. Frank, D.A. (1999) Mol Med 5, 432-56.
  6. Wen, Z. et al. (1995) Cell 82, 241-50.

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Western Blot Buffer

IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.

Applications Key

WB: Western Blotting IP: Immunoprecipitation IF-IC: Immunofluorescence (Immunocytochemistry) FC-FP: Flow Cytometry (Fixed/Permeabilized) ChIP: Chromatin IP ChIP-seq: Chromatin IP-seq

Cross-Reactivity Key

H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
Alexa Fluor is a registered trademark of Life Technologies Corporation.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

使用に関する制限

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Revision 7
#7649

Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb

Western Blotting Image 1: Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb Expand Image
Western blot analysis of extracts from HeLa, A20, and PC-12 cells, untreated or treated with Human Interferon-α1 (hIFN-α1) #8927 (10 ng/ml, 30 min), using Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb (upper) or Stat1 Antibody #9172 (lower).
No image available
Immunofluorescence Image 1: Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb Expand Image
Confocal immunofluorescent analysis of HeLa cells, untreated (left) or treated with hIFN-α1 #8927 (100 ng/mL, 30 min; right), using Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb (green) and β-Tubulin (9F3) Rabbit mAb (Alexa Fluor® 555 Conjugate) #2116 (red).
Flow Cytometry Image 1: Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb Expand Image
Flow cytometric analysis of Jurkat cells, untreated (blue) or treated with hIFN-α1 #8927 (green), using Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb.
Chromatin Immunoprecipitation Image 1: Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb Expand Image
Chromatin immunoprecipitations were performed with cross-linked chromatin from HT-1080 cells treated with IFN-γ (50 ng/ml) for 30 minutes and Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb, using SimpleChIP® Enzymatic Chromatin IP Kit (Magnetic Beads) #9003. DNA Libraries were prepared using DNA Library Prep Kit for Illumina® (ChIP-seq, CUT&RUN) #56795. The figure shows binding across IRF-1, a known target gene of Phospho-Stat1 (see additional figure containing ChIP-qPCR data). For additional ChIP-seq tracks, please download the product datasheet.
Chromatin Immunoprecipitation Image 2: Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb Expand Image
Chromatin immunoprecipitations were performed with cross-linked chromatin from 4 x 106 HT-1080 cells treated with IFN-γ (50 ng/ml) for 30 minutes and 5 μl of Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb, using SimpleChIP® Enzymatic Chromatin IP Kit (Magnetic Beads) #9003. DNA Libraries were prepared using DNA Library Prep Kit for Illumina® (ChIP-seq, CUT&RUN) #56795. The figure shows binding across chromosome 5 (upper), including IRF1 (lower), a known target gene of Phospho-Stat1 (see additional figure containing ChIP-qPCR data).
Chromatin Immunoprecipitation Image 3: Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb Expand Image
Chromatin immunoprecipitations were performed with cross-linked chromatin from HT-1080 cells treated with IFN-γ (50 ng/ml) for 30 minutes and either Phospho-Stat1 (Tyr701) (D4A7) Rabbit mAb or Normal Rabbit IgG #2729 using SimpleChIP® Enzymatic Chromatin IP Kit (Magnetic Beads) #9003. The enriched DNA was quantified by real-time PCR using human IRF-1 promoter primers, SimpleChIP® Human TAP1 Promoter Primers #5148, and SimpleChIP® Human α Satellite Repeat Primers #4486. The amount of immunoprecipitated DNA in each sample is represented as signal relative to the total amount of input chromatin, which is equivalent to one.