Signal Transducer and Activator of Transcription 5A (STAT5A) (pTyr694) antibody

Antigen: Signal Transducer and Activator of Transcription 5A (STAT5A)

Synonyms: MGF, STAT5, AA959963, Stat5, STATA5, STAT5A/MGF, STAT5A

Binding Site: pTyr694

Clonality: Monoclonal (47)

Host: Mouse

Reactivity: Sheep (Ovine)

Conjugate: Un-conjugated

Application: Western Blotting (WB), Intracellular Flow Cytometry (ICFC)

Catalog no.: ABIN968701

Additional Information

Alternative name: Stat5

Immunogen: Phosphorylated Sheep Stat5 Peptide

Cross-Reactivity: Human

Format: Liquid

Isotype: IgG1

Clone: 47

Description: The Stat proteins function both as cytoplasmic signal transducers and as activators of transcription. Seven mammalian STATs have been identified: Stat 1-4, Stat5a, 5b, and Stat6. The SH3 domain of Stat5 shows extensive homology with the SH2 domains of Stat1 and Stat2. This homology leads to speculation that it may have a broader physiological role than originally anticipated and has led to its classification as a member of the Stat family. Stat5 has been further characterized and shown to be encoded by two separate genes, Stat5a and Stat5b that share over 90% identity at the amino acid level. Further insight into the exact biological role of Stat5a and Stat5b was determined with the generation of Stat5a and Stat5b deficient mice. Stat5a was shown to be involved in lactogenesis and mammary development, while Stat5b was shown to be involved in growth hormone signaling and to play a role in liver gene expression. Both Stat5a and Stat5b share similarities, both are involved in IL-2 induced peripheral T cell proliferation. Stat5 (MGF) mRNA expression is highest in mammary gland tissue. Lower levels are found in ovary, thymus, spleen, kidney, lung, muscle, and the adrenal gland. The peptide hormone, prolactin, binds to the prolactin receptor (PRLR) to initiate the lactogenic response. There are at least three forms of PRLR, however, only the long form is able to activate the 92 kDa Stat5 protein by inducing phosphorylation at Tyr694. Once phosphorylated, Stat5 becomes an essential transcription factor which binds to the beta-casein gene promoter. Stat5 activity is tightly regulated throughout gestation, lactation, and post-lactation. Treatment of activated Stat5 with a protein tyrosine phosphatase results in the loss of DNA binding activity. The presence of an SH2 domain within Stat5 suggests that it may directly interact with protein tyrosine kinases (PTKs) such as JAK2. This antibody is routinely tested by Western blot analysis.

Characteristics: 1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
2. Please refer to us for technical protocols.
3. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
4. Source of all serum proteins is from USDA inspected abattoirs located in the United States.

Molecular Weight: 92 kDa

Comments:

Related Products: ABIN968534

Application Details

Application Notes: For use in flow cytometry the conjugated formats of Anti-Human Stat5 (pY694) are recommended (PE-labeled, Alexa Fluor 488® and Alexa Fluor 647®).

Concentration: 250 µg/ml

Purity: Purified

Purification: Purified from tissue culture supernatant or ascites by affinity chromatography.

Buffer: Aqueous buffered solution containing BSA, glycerol.

Preservative: 0.09% Sodium azide.

Storage: Store undiluted at -20° C.

Research Area: Signaling, Receptors, Inflammation

Restrictions: For Research Use only

Images

A431 cells were either left untreated (-) or treated (+) with 100 ng/ml EGF for 5 minutes at 37°C. The top panel was probed with Stat5 (ABIN967810) and the bottom was probed with Stat5 (pY694) (ABIN968701).

Publications

Product: Wakao, Gouilleux, Groner: "Mammary gland factor (MGF) is a novel member of the cytokine regulated transcription factor gene family and confers the prolactin response." in: The EMBO journal, Vol. 13, Issue 9, pp. 2182-91, 1994 (PubMed).

Gouilleux, Pallard, Dusanter-Fourt et al.: "Prolactin, growth hormone, erythropoietin and granulocyte-macrophage colony stimulating factor induce MGF-Stat5 DNA binding activity." in: The EMBO journal, Vol. 14, Issue 9, pp. 2005-13, 1995 (PubMed).

Gouilleux, Wakao, Mundt et al.: "Prolactin induces phosphorylation of Tyr694 of Stat5 (MGF), a prerequisite for DNA binding and induction of transcription." in: The EMBO journal, Vol. 13, Issue 18, pp. 4361-9, 1994 (PubMed).

Park, Lee, Frank et al.: "Caveolin-1-deficient mice show accelerated mammary gland development during pregnancy, premature lactation, and hyperactivation of the Jak-2/STAT5a signaling cascade." in: Molecular biology of the cell, Vol. 13, Issue 10, pp. 3416-30, 2002 (PubMed).

Williams, Cheung, Park et al.: "Loss of caveolin-1 gene expression accelerates the development of dysplastic mammary lesions in tumor-prone transgenic mice." in: Molecular biology of the cell, Vol. 14, Issue 3, pp. 1027-42, 2003 (PubMed).