MALT1 enhances BCL10-induced activation: acts via formation of CBM complexes that channel adaptive and innate immune signaling downstream of CARD domain-containing proteins (CARD9, CARD11 and CARD14) to activate NF-kappa-B and MAP kinase p38 pathways which stimulate expression of genes encoding pro-inflammatory cytokines and chemokines. Mediates BCL10 cleavage: MALT1-dependent BCL10 cleavage plays an important role in T-cell antigen receptor-induced integrin adhesion. Involved in the induction of T helper 17 cells (Th17) differentiation. Cleaves RC3H1 and ZC3H12A in response to T-cell receptor (TCR) stimulation which releases their cooperatively repressed targets to promote Th17 cell differentiation (By similarity). Also mediates cleavage of N4BP1 in T-cells following TCR-mediated activation, leading to N4BP1 inactivation. May also have ubiquitin ligase activity: binds to TRAF6, inducing TRAF6 oligomerization and activation of its ligase activity.
Background References
1. Tan H et al. Integrative Analysis of MALT1 as a Potential Therapeutic Target for Prostate Cancer and its Immunological Role in Pan-Cancer. Front Mol Biosci 8:714906 (2021).
2. Demeyer A et al. MALT1 Proteolytic Activity Suppresses Autoimmunity in a T Cell Intrinsic Manner. Front Immunol 10:1898 (2019).
Western blot analysis of MALT1 on different lysates with Rabbit anti-MALT1 antibody (HA721689) at 1/1,000 dilution.
Lane 1: HCT116 cell lysate (20 µg/Lane) Lane 2: HeLa cell lysate (20 µg/Lane) Lane 3: Ramos cell lysate (20 µg/Lane) Lane 4: K-562 cell lysate (20 µg/Lane) Lane 5: Jurkat cell lysate (20 µg/Lane) Lane 6: HepG2 cell lysate (20 µg/Lane) Lane 7: 786-0 cell lysate (20 µg/Lane) Lane 8: LNCaP cell lysate (20 µg/Lane) Lane 9: PC-3M cell lysate (20 µg/Lane) Lane 10: SW480 cell lysate (20 µg/Lane) Lane 11: Mouse lymph node tissue lysate (no heat) (40 µg/Lane) Lane 12: Mouse thymus tissue lysate (40 µg/Lane) Lane 13: Rat thymus tissue lysate (40 µg/Lane)
Notice: no heat means the lysate is not boiled.
Predicted band size: 92 kDa Observed band size: 92 kDa
Exposure time: 43 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 (HA721689) at 1/1,000 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.
Immunohistochemical analysis of paraffin-embedded human colon cancer tissue with Rabbit anti-MALT1 antibody (HA721689) at 1/5,000 dilution.
The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH 6.0) (high pressure) for 2 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA721689) at 1/5,000 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Immunohistochemical analysis of paraffin-embedded human colon tissue with Rabbit anti-MALT1 antibody (HA721689) at 1/2,000 dilution.
The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH 6.0) (high pressure) for 2 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA721689) at 1/2,000 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Immunocytochemistry analysis of Ramos cells labeling MALT1 with Rabbit anti-MALT1 antibody (HA721689) at 1/100 dilution.
Cells were fixed in 100% precooled methanol for 5 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-MALT1 antibody (HA721689) 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 (M1305-2, 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.
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