Anti-TIF1 gamma/TRIM33 Antibody Picoband®

Tripartite motif-containing 33 (TRIM33), also known as transcriptional intermediary factor 1 gamma (TIF1-γ), is a human gene. The TRIM33 gene is mapped to chromosome 1p13 by FISH. The protein encoded by this gene is thought to be a transcriptional corepressor. However, molecules that interact with this protein have not yet been identified. The protein is a member of the tripartite motif family. This motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region. Three alternatively spliced transcript variants for this gene have been described; however, the full-length nature of one variant has not been determined.

E3 ubiquitin-protein ligase TRIM33;6.3.2.-; Ectodermin homolog; RET-fused gene 7 protein; Protein Rfg7; Transcription intermediary factor 1-gamma; TIF1-gamma; Tripartite motif-containing protein 33; TRIM33; KIAA1113, RFG7, TIF1G

E.coli-derived human TIF1 gamma recombinant protein (Position: M1001-K1127) . Human TIF1 gamma shares 96.1% amino acid (aa) sequence identity with mouse TIF1 gamma.

Expressed in stem cells at the bottom of the crypts of the colon (at protein level) . Expressed in colon adenomas and adenocarcinomas (at protein level) . Expressed in brain, lung, liver, spleen, thymus, prostate, kidney, testis, heart, placenta, pancreas, small intestine, ovary, colon, skeletal muscle and hematopoietic progenitors.

Acts as an E3 ubiquitin-protein ligase. Promotes SMAD4 ubiquitination, nuclear exclusion and degradation via the ubiquitin proteasome pathway. According to PubMed:16751102, does not promote a decrease in the level of endogenous SMAD4. May act as a transcriptional repressor. Inhibits the transcriptional response to TGF-beta/BMP signaling cascade. Plays a role in the control of cell proliferation. Its association with SMAD2 and SMAD3 stimulates erythroid differentiation of hematopoietic stem/progenitor (By similarity) . Monoubiquitinates SMAD4 and acts as an inhibitor of SMAD4-dependent TGF-beta/BMP signaling cascade (Monoubiquitination of SMAD4 hampers its ability to form a stable complex with activated SMAD2/3 resulting in inhibition of TGF- beta/BMP signaling cascade) . .

1. Entrez Gene: TRIM33 tripartite motif-containing 33. 2. He, W., Dorn, D. C., Erdjument-Bromage, H., Tempst, P., Moore, M. A. S., Massague, J. Hematopoiesis controlled by distinct TIF1-gamma and Smad4 branches of the TGF-beta pathway. Cell 125: 929-941, 2006. 3. Venturini, L., You, J., Stadler, M., Galien, R., Lallemand, V., Koken, M. H. M., Mattei, M. G., Ganser, A., Chambon, P., Losson, R., de The, H. TIF1-gamma, a novel member of the transcriptional intermediary factor 1 family. Oncogene 18: 1209-1217, 1999.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.