Human ER alpha /NR3A1 Antibody

Catalog #: MAB57152 Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
MAB57152
MAB57152-SP

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Summary Data Examples Preparation and Storage Reconstitution Calculator Background Product Datasheets Related Research Areas

Human ER alpha /NR3A1 Antibody Summary

Species Reactivity

Human

Specificity

Detects human ER alpha /NR3A1 in direct ELISAs and Western blots. In direct ELISAs and Western blots, no cross-reactivity with recombinant human ER beta is observed.

Source

Monoclonal Mouse IgG_2B Clone # 681104

Purification

Protein A or G purified from hybridoma culture supernatant

Immunogen

E. coli-derived recombinant human ER alpha /NR3A1
Thr2-Gln116
Accession # P03372

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Label

Unconjugated

Applications

Recommended Concentration

Sample

Immunohistochemistry

8-25 µg/mL

See below

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Scientific Data

Immunohistochemistry

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ER alpha /NR3A1 in Human Breast. ERa/NR3A1 was detected in immersion fixed paraffin-embedded sections of human breast using Mouse Anti-Human ERa/NR3A1 Monoclonal Antibody (Catalog # MAB57152) at 15 µg/mL overnight at 4 °C. Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). Specific staining was localized to nuclei. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Sterile PBS to a final concentration of 0.5 mg/mL.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.

12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: ER alpha/NR3A1

ER alpha (Estrogen receptor alpha; also Estradiol receptor and NR3A1) is a 65-70 kDa member of the NR3 subfamily, nuclear hormone receptor family of proteins. It is widely expressed, and serves as a strong activator of estrogen-responsive genes. ER alpha is normally quiescent and bound to heat-shock proteins and immunophilins. Following beta -estradiol binding, it becomes activated, either homodimerizes or heterodimerizes with ER beta, and binds to DNA with multiple coactivators. Human ER alpha is 595 amino acids (aa) in length. It contains a DNA binding region (aa 185-250), three NLSs (aa 256-260; 266-271; 299-303), a steroid-binding site (aa 351-543), a dimerization motif (aa 497-518), and an O-GlcNAc attachment around Thr575. Major phosphorylation sites exist at Tyr537, Ser167 and Ser118. Multiple splice forms exist. There is an 80 kDa isoform that shows a substitution (duplication) of aa 412-517 for Asp411, a second isoform with a deletion of aa 255-366, a third isoform with a deletion of aa 152-412, and a fourth isoform that shows a Thr substitution for aa 152-595. Human ER alpha is only 46% aa identical to human ER beta. Over aa 1-116, human ER alpha shares 85% aa identity with mouse ER alpha.

Long Name

Estrogen Receptor alpha

Entrez Gene IDs

2099 (Human)

Alternate Names

ER alpha; ER; Era; ER-alpha; ESR1; ESRESRA; Estradiol receptor; estrogen receptor 1; estrogen receptor alpha delta 3*4,56,7*/819-2 isoform; estrogen receptor alpha delta 4 +49 isoform; estrogen receptor alpha delta 4*5,6,7*/654 isoform; estrogen receptor alpha; estrogen receptor; NR3A1; NR3A1DKFZp686N23123; Nuclear receptor subfamily 3 group A member 1