BAG family molecular chaperone regulator 2 is a protein that in humans is encoded by the BAG2 gene. BAG proteins compete with Hip for binding to the Hsc70/Hsp70 ATPase domain and promote substrate release. All the BAG proteins have an approximately 45-amino acid BAG domain near the C terminus but differ markedly in their N-terminal regions. The predicted BAG2 protein contains 211 amino acids. The BAG domains of BAG1, BAG2, and BAG3 interact specifically with the Hsc70 ATPase domain in vitro and in mammalian cells. All 3 proteins bind with high affinity to the ATPase domain of Hsc70 and inhibit its chaperone activity in a Hip-repressible manner.
Background References
1. Rauch JN et al. Binding of human nucleotide exchange factors to heat shock protein 70 (Hsp70) generates functionally distinct complexes in vitro. J. Biol. Chem. 289:1402-1414 (2014).
2. Takayama S et al. An evolutionarily conserved family of Hsp70/Hsc70 molecular chaperone regulators. J. Biol. Chem. 274:781-786 (1999).
Western blot analysis of BAG2 on different lysates with Rabbit anti-BAG2 antibody (ET7109-62) at 1/5,000 dilution.
Lane 1: HeLa (Human cervical adenocarcinoma cell) cell lysate Lane 2: K-562 (Human chronic myelogenous leukemia cell) cell lysate Lane 3: HEK-293 (Human embryonic kidney cell) cell lysate Lane 4: Jurkat (Human T-lymphoblastic cells) cell lysate
Lysates/proteins at 15 µg/Lane. Exposure time: 46 seconds; ECL: K1801
Blocking: 5% NFDM/TBST, 1 hour at room temperature Primary antibody: ET7109-62, 1/5,000 in primary antibody dilution buffer (K1803), overnight at 4 ℃ Secondary antibody: Goat anti-Rabbit IgG-HRP (HA1006), 1/50,000 in 5% NFDM/TBST, 1 hour at room temperature
Predicted band size: 23.8 kDa Observed band size: 24 kDa
Flow cytometric analysis of BAG2 was done on Hela cells. The cells were fixed, permeabilized and stained with the primary antibody (ET7109-62, 1/100) (red). After incubation of the primary antibody at room temperature for an hour, the cells were stained with a Alexa Fluor 488-conjugated goat anti-rabbit IgG Secondary antibody at 1/500 dilution for 30 minutes.Unlabelled sample was used as a control (cells without incubation with primary antibody; black).
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