Catalog # EX5475

phospho-Estrogen Receptor α (Tyr-537) Peptide

Blocking Peptide

Application / Dilution
ELISA50 ng/well

Size 50 μg



Estrogen receptor α (ERα) is a member of the steroid receptor superfamily and its structure includes an N-terminal ligand-independent transactivation domain (AF-1), a highly conserved DNA binding domain, and a C-terminal ligand-dependent transactivation domain (AF-2). AF-1 and AF-2 activate transcription independently and synergistically, and act in a promoter- and cell-specific manner. Phosphorylation at multiple sites provides an important mechanism to regulate ERα activity. Ser-104, Ser-106, Ser-118, and Ser-167 are located in the amino-terminal transcription activation function domain AF-1, and phosphorylation of these serine residues plays an important role in regulating ERα activity. In addition to these sites, phosphorylation of Tyr-537 has been implicated in maximal hormone binding, dimerization, and transcriptional activity. Tyr-537, located in the AF-2 domain, is phosphorylated by c-Src leading to nuclear export of ERα and degradation. Thus, a variety of phosphorylation events control ERα activity.



Anbalagan M, Rowan BG (2015) Mol Cell Endocrin. 418(3):264.
Castoria, G. et al. (2012) Oncogene. 31:4868.

Phospho-ERα (Tyr-537) synthetic peptide corresponds to amino acids surrounding Tyr-537 in human ERα. This sequence is well conserved in rat and mouse ERα, and is also well conserved in ERβ (Tyr-488).

*For more information, see UniProt Accession P03372
Blocking Peptide is supplied in 50µl phosphate-buffered saline and 0.05% sodium azide.

The products are are safely shipped at ambient temperature for both domestic and international shipments. Each product is guaranteed to match the specifications as indicated on the corresponding technical data sheet. Please store at -20C upon arrival for long term storage.

The peptide is specifically recognized by ERα (Tyr-537) phospho-specific antibody (EP5471) in ELISA, and has been shown to block the reactivity of EP5471 in Western blot. In addition, the peptide is recommended for use in blocking EP5471 reactivity in immunocytochemistry.

*All molecular weights (MW) are confirmed by comparison to Bio-Rad Rainbow Markers and to western blot mobilities of known proteins with similar MW.

This kit contains: