Lysosome-associated membrane protein 2 (LAMP2), also known as CD107b (Cluster of Differentiation 107b) and Mac-3, is a human gene. Its protein, LAMP2, is one of the lysosome-associated membrane glycoproteins. The protein encoded by this gene is a member of a family of membrane glycoproteins. This glycoprotein provides selectins with carbohydrate ligands. It may play a role in tumor cell metastasis. It may also function in the protection, maintenance, and adhesion of the lysosome. Alternative splicing of the gene produces three variants - LAMP-2A, LAMP-2B and LAMP-2C. LAMP-2A is the receptor for chaperone-mediated autophagy. Recently it has been determined that antibodies against LAMP-2 account for a fraction of patients who get a serious kidney disease termed focal necrotizing glomerulonephritis. LAMP-2B is associated with Danon disease.
背景文献
1. Guan, JJ. et al. 2015. DRAM1 regulates apoptosis through increasing protein levels and lysosomal localization of BAX. Cell death & disease. 6: e1624.
2. Gu, G. et al. 2013. Ubiquitin E3 Ligase A20 is Required in Degradation of Microbial Superantigens in Vascular Endothelial Cells. Cell Biochem. Biophys. 66: 649-655.
序列相似性
Belongs to the LAMP family.
组织特异性
Isoform LAMP-2A is highly expressed in placenta, lung and liver, less in kidney and pancreas, low in brain and skeletal muscle. Isoform LAMP-2B is detected in spleen, thymus, prostate, testis, small intestine, colon, skeletal muscle, brain, placenta, lung, kidney, ovary and pancreas and liver. Isoform LAMP-2C is detected in small intestine, colon, heart, brain, skeletal muscle, and at lower levels in kidney and placenta.
翻译后修饰
O- and N-glycosylated; some of the 16 N-linked glycans are polylactosaminoglycans.
Western blot analysis of LAMP2a on different lysates with Rabbit anti-LAMP2a antibody (ET1601-24) at 1/5,000 dilution.
Lane 1: SK-MEL-28 cell lysate (20 µg/Lane) Lane 2: HeLa cell lysate (20 µg/Lane) Lane 3: JAR cell lysate (20 µg/Lane) Lane 4: U-937 cell lysate (20 µg/Lane) Lane 5: RAW264.7 cell lysate (15 µg/Lane) Lane 6: NIH/3T3 cell lysate (15 µg/Lane) Lane 7: PC-12 cell lysate (15 µg/Lane) Lane 8: Mouse liver tissue lysate (30 µg/Lane) Lane 9: Rat liver tissue lysate (30 µg/Lane) Lane 10: Rat lung tissue lysate (30 µg/Lane)
Predicted band size: 45 kDa Observed band size: 70-140 kDa
Exposure time: Lane 1-4: 2 minutes 37 seconds; Lane 5-10: 5 minutes;
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 (ET1601-24) at 1/5,000 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 kidney tissue with Rabbit anti-LAMP2a antibody (ET1601-24) at 1/500 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 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 (ET1601-24) at 1/500 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 mouse pancreas tissue with Rabbit anti-LAMP2a antibody (ET1601-24) at 1/500 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 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 (ET1601-24) at 1/500 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 rat kidney tissue with Rabbit anti-LAMP2a antibody (ET1601-24) at 1/500 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 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 (ET1601-24) at 1/500 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.
LAMP2a was immunoprecipitated from 0.2 mg SK-MEL-28 cell lysate with ET1601-24 at 2 µg/10 µl beads. Western blot was performed from the immunoprecipitate using ET1601-24 at 1/2,000 dilution. HRP Conjugated Rabbit IgG kappa light chain antibody (M1208-2) at 1/5,000 dilution was used for 1 hour at room temperature.
Lane 1: SK-MEL-28 cell lysate (Input) Lane 2: ET1601-24 IP in SK-MEL-28 cell lysate Lane 3: Rabbit IgG instead of ET1601-24 in SK-MEL-28 cell lysate