Detection of Human Phospho-Progesterone RB (S294) and Phospho-Progesterone RA (S130) by Western Blot.
Western blot shows lysates of T47D human breast cancer cell line untreated (-) or treated (+) with 100 nM synthetic progestin promegestone (R5020) for 60 minutes. PVDF Membrane was probed with 0.5 µg/mL of Rabbit Anti-Human Phospho-Progesterone R/NR3C3 (S294) Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5955) followed by HRP-conjugated Anti-Rabbit IgG Secondary Antibody (Catalog # HAF008). Specific bands were detected for Phospho-Progesterone RB (S294) at approximately 118 kDa and Phospho-Progesterone RA (S130) at approximately 90 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Preparation and Storage
Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
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: Progesterone R/NR3C3
Progesterone Receptor B (PR-B) is a 118 kDa member of the NR3 subfamily within the nuclear hormone receptor family of proteins. It is expressed in female reproductive tissues as well as neurons throughout the CNS. PR-B is particularly important in the mammary gland where it mediates proliferative responses to progesterone. Human PR‑B is 933 amino acids (aa) in length. It contains an N-terminal regulatory region (aa 1‑566), a DNA binding domain (aa 567‑639), and a steroid‑binding region (aa 681‑933). Ligand binding induces a key phosphorylation event at Ser294 catalyzed by ERK1/2, regulating cell growth, cell adhesion, and gene transcription. An alternate start site at Met165 generates 90 kDa PR-A, an isoform particularly important in the ovary and uterus that insures fertility.
Entrez Gene IDs:
NR3C3; NR3C3PRNuclear receptor subfamily 3 group C member 3; PGR; Progesterone R; progesterone receptor; ProgesteroneR
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