Bcl-2-interacting killer is a protein that in humans is encoded by the BIK gene. The protein encoded by this gene is known to interact with cellular and viral survival-promoting proteins, such as BCL2 and the Epstein–Barr virus in order to enhance programmed cell death. Because its activity is suppressed in the presence of survival-promoting proteins, this protein is suggested as a likely target for antiapoptotic proteins. This protein shares a critical BH3 domain with other death-promoting proteins, BAX and BAK.
Background References
1. Mebratu YA et al. Bik promotes proteasomal degradation to control low-grade inflammation. J Clin Invest. 2023 Dec
2. Zhang P et al. TMEM215 Prevents Endothelial Cell Apoptosis in Vessel Regression by Blunting BIK-Regulated ER-to-Mitochondrial Ca Influx. Circ Res. 2023 Oct
Western blot analysis of Bik on different lysates with Rabbit anti-Bik antibody (HA723343) at 1/10,000 dilution.
Lane 1: Ramos cell lysate Lane 2: SK-Br-3 cell lysate (negative) Lane 3: Raji cell lysate Lane 4: THP-1 cell lysate
Lysates/proteins at 20 µg/Lane.
Predicted band size: 18 kDa Observed band size: 18 kDa
Exposure time: 25 seconds; ECL: K1801;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA723343) at 1/10,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
Immunocytochemistry analysis of Ramos cells labeling Bik with Rabbit anti-Bik antibody (HA723343) at 1/100 dilution.
Cells were fixed in 4% paraformaldehyde for 15 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS for 15 minutes at room temperature, then blocked with 1% BSA in 10% negative goat serum for 1 hour at room temperature. Cells were then incubated with Rabbit anti-Bik antibody (HA723343) at 1/100 dilution in 1% BSA in PBST overnight at 4 ℃. Goat Anti-Rabbit IgG H&L (iFluor™ 488, HA1121) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. Nuclear DNA was labelled in blue with DAPI.
Beta tubulin (HA601187, red) was stained at 1/100 dilution overnight at +4℃. Goat Anti-Mouse IgG H&L (iFluor™ 594, HA1126) was used as the secondary antibody at 1/1,000 dilution.
Bik was immunoprecipitated from 0.2 mg Ramos cell lysate with HA723343 at 2 µg/10 µl beads. Western blot was performed from the immunoprecipitate using HA723343 at 1/1,000 dilution. HRP Conjugated Anti-Rabbit IgG for IP Nano-secondary antibody at 1/5,000 dilution was used for 1 hour at room temperature.
Lane 1: Ramos cell lysate (input) Lane 2: HA723343 IP in Ramos cell lysate Lane 3: Rabbit IgG instead of HA723343 in Ramos cell lysate