Plays a role in cytotoxic granule exocytosis in lymphocytes. Required for both granule maturation and granule docking and priming at the immunologic synapse. Regulates assembly of recycling and late endosomal structures, leading to the formation of an endosomal exocytic compartment that fuses with perforin-containing granules at the immunologic synapse and licences them for exocytosis. Regulates Ca2+-dependent secretory lysosome exocytosis in mast cells.Expressed at high levels in spleen, thymus and leukocytes. Also expressed in lung and placenta, and at very low levels in brain, heart, skeletal muscle and kidney. Expressed in cytotoxic T-lymphocytes (CTL) and mast cells.
Background References
1. Neeft M. et. al. Munc13-4 is an effector of rab27a and controls secretion of lysosomes in hematopoietic cells. Mol. Biol. Cell 16:731-741(2005).
Western blot analysis of Munc13-4 on different lysates with Rabbit anti-Munc13-4 antibody (HA500052) at 1/2,000 dilution.
Lane 1: K-562 (Human chronic myelogenous leukemia cell) cell lysate Lane 2: MOLT-4 (Human acute T-Cell leukemia cell) cell lysate
Lysates/proteins at 10 µg/Lane. Exposure time: 10s seconds; ECL: K1801
Blocking: 5% NFDM/TBST, 1 hour at room temperature Primary antibody: HA500052, 1/2,000 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: 123 kDa Observed band size: 120 kDa
Application: Immunocytochemistry (IF-cell)
Species: Human Sample: MOLT-4 (Human acute T-Cell leukemia cell)
Fixation: 4% Paraformaldehyde, 15 minutes at room temperature. Permeabilization: 0.1% Triton X-100, 15 minutes at room temperature. Blocking: 1% BSA + 10% normal goat serum, 1 hour at room temperature. Antibody dilution buffer: 1% BSA in PBST.
Primary antibody: HA500052, 1/100, overnight at 4℃. Secondary antibody: Goat Anti-Rabbit IgG (iFluor™ 488, HA1121), 45 minutes at room temperature. Counterstain: Beta tubulin (HA601187, Red), 1/100, overnight at 4℃. The nuclear counterstain was DAPI (Blue).
Immunohistochemical analysis of paraffin-embedded rat spleen tissue using anti-Munc13-4 antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA500052, 1/100) for 30 minutes 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 placenta tissue using anti-Munc13-4 antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA500052, 1/400) for 30 minutes 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.
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