The transformation of a normal cell to one that is malignant can result from mutations in genes that encode proteins with key regulatory functions. Examples include the retinoblastoma gene product (Rb p110), p53, VHL and APC. Using a novel cloning strategy that allows the isolation of previously uncharacterized genes encoding selectable recessive phenotypes, an additional tumor suppressor gene has been identified. This gene, termed tsg 101 for tumor susceptibility gene 101, encodes a stathmin binding domain protein. When expression of this growth inhibitory gene is blocked in NIH/3T3 cells using antisense mRNA, the cells exhibit a transformed phenotype and are tumorigenic in SL6 mice.
Background References
1. Ruiz-Guillen M et al. Capsid-deficient alphaviruses generate propagative infectious microvesicles at the plasma membrane. Cell Mol Life Sci 73:3897-916 (2016).
2. Baranyai T et al. Isolation of Exosomes from Blood Plasma: Qualitative and Quantitative Comparison of Ultracentrifugation and Size Exclusion Chromatography Methods. PLoS One 10:e0145686 (2015).
Sequence Similarity
Belongs to the ubiquitin-conjugating enzyme family. UEV subfamily.
Tissue Specificity
Heart, brain, placenta, lung, liver, skeletal, kidney and pancreas.
Post-translational Modification
Monoubiquitinated at multiple sites by LRSAM1 and by MGRN1. Ubiquitination inactivates it, possibly by regulating its shuttling between an active membrane-bound protein and an inactive soluble form. Ubiquitination by MGRN1 requires the presence of UBE2D1.
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Western blot analysis of TSG101 on different lysates with Rabbit anti-TSG101 antibody (ET1701-59) at 1/2,000 dilution and competitor's antibody at 1/1,000 dilution.
Lane 1: HeLa cell lysate Lane 2: K-562 cell lysate Lane 3: MCF7 cell lysate Lane 4: Jurkat cell lysate Lane 5: C2C12 cell lysate Lane 6: PC-12 cell lysate
Lysates/proteins at 20 µg/Lane.
Predicted band size: 44 kDa Observed band size: 44/47 kDa
Exposure time: 3 minutes 20 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 (ET1701-59) at 1/2,000 dilution and competitor's antibody at 1/1,000 dilution were 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.
☑ Knockdown (KD)
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Western blot analysis of TSG101 with anti-TSG101 antibody[JJ0900] (ET1701-59) at 1/2,000 dilution. Lane 1: Wild-type Hela whole cell lysate (10 µg). Lane 2/3: TSG101 knockdown Hela whole cell lysate (10 µg).
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM in TBST for 1 hour at room temperature. The primary antibody (ET1701-59, 1/2,000) was used in 5% BSA at room temperature for 2 hours. Goat Anti-Rabbit IgG-HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Western blot analysis of TSG101 on different lysates with Rabbit anti-TSG101 antibody (ET1701-59) at 1/2,000 dilution.
Lane 1: HeLa cell lysate Lane 2: K-562 cell lysate Lane 3: Jurkat cell lysate Lane 4: NIH/3T3 cell lysate Lane 5: PC-12 cell lysate Lane 6: Mouse brain tissue lysate Lane 7: Rat brain tissue lysate
Lysates/proteins at 20 µg/Lane.
Predicted band size: 44 kDa Observed band size: 44/47 kDa
Exposure time: 1 minute 40 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 (ET1701-59) at 1/2,000 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.
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Immunocytochemistry analysis of HeLa cells labeling TSG101 with Rabbit anti-TSG101 antibody (ET1701-59) at 1/200 dilution.
Cells were fixed in 4% paraformaldehyde for 20 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS 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-TSG101 antibody (ET1701-59) at 1/200 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.
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Immunocytochemistry analysis of NIH/3T3 cells labeling TSG101 with Rabbit anti-TSG101 antibody (ET1701-59) at 1/200 dilution.
Cells were fixed in 4% paraformaldehyde for 20 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS 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-TSG101 antibody (ET1701-59) at 1/200 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.
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Immunocytochemistry analysis of PC-12 cells labeling TSG101 with Rabbit anti-TSG101 antibody (ET1701-59) at 1/200 dilution.
Cells were fixed in 4% paraformaldehyde for 20 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS 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-TSG101 antibody (ET1701-59) at 1/200 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.
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Immunohistochemical analysis of paraffin-embedded human kidney tissue with Rabbit anti-TSG101 antibody (ET1701-59) at 1/200 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 (ET1701-59) at 1/200 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.
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Immunohistochemical analysis of paraffin-embedded human colon carcinoma tissue with Rabbit anti-TSG101 antibody (ET1701-59) at 1/1,000 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 (ET1701-59) at 1/1,000 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.
This data was developed using ET1701-59, the same antibody clone in a different buffer formulation. Flow cytometric analysis of HeLa cells labeling TSG101.
Cells were fixed and permeabilized. Then stained with the primary antibody (ET1701-59, 1/1,000) (red) compared with Rabbit IgG Isotype Control (green). After incubation of the primary antibody at +4℃ for an hour, the cells were stained with a iFluor™ 488 conjugate-Goat anti-Rabbit IgG Secondary antibody (HA1121) at 1/1,000 dilution for 30 minutes at +4℃. Unlabelled sample was used as a control (cells without incubation with primary antibody; black).
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