Rabbit TIF1 beta Polyclonal Antibody | anti-TIF1beta antibody

Phospho-TIF1 beta (Ser824) Antibody

Cat. Num. AAA9614353

• Gene Names: TRIM28; KAP1; TF1B; RNF96; TIF1B; PPP1R157
• Reactivity: Human, Mouse, Rat; Predicted Reactivity: Rabbit (88%)
• Applications: Western Blot, ELISA
• Purity: The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
• Synonyms: TIF1 beta; Polyclonal Antibody; Phospho-TIF1 beta (Ser824) Antibody; E3 SUMO protein ligase TRIM28; E3 SUMO-protein ligase TRIM28; FLJ29029; KAP 1; KAP-1; KRAB associated protein 1; KRAB interacting protein 1; KRAB-associated protein 1; KRAB-interacting protein 1; KRIP 1; KRIP-1; KRIP1; Nuclear corepressor KAP 1; Nuclear corepressor KAP-1; RING finger protein 96; RNF96; TF1B; TIF1-beta; TIF1B; TIF1B_HUMAN; Transcription intermediary factor 1 beta; Transcription intermediary factor 1-beta; Trim28; Tripartite motif containing 28; tripartite motif containing protein 28; Tripartite motif-containing protein 28; anti-TIF1beta antibody

• Host: Rabbit
• Reactivity: Human, Mouse, Rat; Predicted Reactivity: Rabbit (88%)
• Clonality: Polyclonal
• Isotype: Rabbit IgG
• Specificity: Phospho-TIF1 beta (Ser824) Antibody detects endogenous levels of TIF1 beta only when phosphorylated at Ser824.; Tissue Specificity: Expressed in all tissues tested including spleen, thymus, prostate, testis, ovary, small intestine, colon and peripheral blood leukocytes.
• Purity/Purification: The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
• Form/Format: Liquid. Rabbit IgG in phosphate buffered saline, pH7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
• Concentration: 1mg/ml (varies by lot)

• Applicable Applications for anti-TIF1beta antibody: Western Blot (WB), Peptide ELISA (EIA)
• Application Notes: WB: 1:1000-3000; Peptide ELISA: 1:20,000-1:40,000
• Immunogen: A synthesized peptide derived from human TIF1-beta around the phosphorylation site of Ser824.
• Conjugation: Unconjugated
• Fragment: Fab fragment
• Post Translational Modifications: ATM-induced phosphorylation on Ser-824 represses sumoylation leading to the de-repression of expression of a subset of genes involved in cell cycle control and apoptosis in response to genotoxic stress. Dephosphorylation by the phosphatases, PPP1CA and PP1CB forms, allows sumoylation and expression of TRIM28 target genes. Sumoylation/desumoylation events regulate TRIM28-mediated transcriptional repression. Sumoylation is required for interaction with CHD3 and SETDB1 and the corepressor activity. Represses and is repressed by Ser-824 phosphorylation. Enhances the TRIM28 corepressor activity, inhibiting transcriptional activity of a number of genes including GADD45A and CDKN1A/p21. Lys-554, Lys-779 and Lys-804 are the major sites of sumoylation. In response to Dox-induced DNA damage, enhanced phosphorylation on Ser-824 prevents sumoylation and allows de-repression of CDKN1A/p21. Auto-ubiquitinated; enhanced by MAGEA2 and MAGEC2.Citrullinated by PADI4.
• Subunit Structure: Interacts with SETX. Oligomer; the RBCC domain homotrimerizes and interacts with one molecule of KRAB to form the KRAB-KAP1 corepressor complex. Binding to a KRAB domain is an absolute requirement for silencing gene expression. Interacts with CEBPB and NR3C1. Interacts with a number of KRAB-ZFP proteins including ZNF10, ZFP53, ZFP68, ZNF382 and ZNF256. Interacts with NCOR1, NR3C1 and CHD3. Interacts with CEBPB (via the RING-type and PHD-type zinc fingers). Component of a ternary complex that includes TRIM28, a HP1 protein (CBX1, CBX3 OR CBX5), a KRAB domain-containing protein, and DNA. Interacts with CBX5 (via the PxVxL motif); the interaction occurs in interphase nuclei and competes for binding POGZ. Interacts with POGZ; the interaction competes for interaction with CBX5. Interacts with SETDB1; the interaction is enhanced by KAP1 sumoylation, stimulates SETDB1 histone methyltransferase activity and gene silencing. Interacts (via the PHD-type zinc finger) with UBE2I; the interaction is required for sumoylation and repressor activity. Component of the TRIM28/KAP1-ERBB4-MDM2 complex involved in connecting growth factor and DNA damage responses. Interacts directly with ERBB4; the interaction represses ERBB4-mediated transcription activity. Interacts with MDM2; the interaction contributes to p53/TP53 inactivation. Component of the TRIM28/KAP1-MDM2-p53/TP53; involved in regulating p53/TP53 stabilization and activity. Interacts (via the leucine zipper alpha helical coiled-coil) with E2F1 (central region); the interaction inhibits E2F1 acetylation and transcriptional activity. Interacts with PPP1CA; the interaction dephosphorylates TRIM28 at Ser-824 and forms a complex at the p21 promoter site. Interacts with PPP1CB; the interaction is weak but is increased on dephosphorylation at Ser-824. Interacts with FES/FPS. Interacts with SMARCAD1. Interacts with, and sumoylates IRF7. Interacts with MAGEC2. Part of a complex composed of TRIM28, HDAC1, HDAC2 and EHMT2. Interacts with AICDA (By similarity). Interacts (via the RBCC domain) with KOX1 (via the KRAB domain), ZNF268 (via the KRAB domain) and ZNF300 (via the KRAB domain); the interactions increase KOX1, ZNF268 and ZNF300 nuclear localization activities. The large PER complex involved in the histone methylation is composed of at least PER2, CBX3, TRIM28, SUV39H1 and/or SUV39H2; CBX3 mediates the formation of the complex. Interacts with isoform 2 of ZFP90. Forms a complex with FOXP3 in the presence of isoform 2 of ZFP90. Interacts with NR4A3; the interactions potentiates NR4A3 activity on NurRE promoter (By similarity). Interacts (unphosphorylated or phosphorylated form) with ZBTB1 (via BTB domain). Probably part of a corepressor complex containing ZNF304, TRIM28, SETDB1 and DNMT1. Interacts with ATRX. Forms a complex with ATRX, SETDB1 and ZNF274. Interacts with ZFP568; the interaction mediates ZFP568 transcriptional repression activity (By similarity). Interacts with RRP1B. Interacts with CRY1 (By similarity). (Microbial infection) Interacts with herpes virus 8 protein LANA1; this interaction facilitates establishment of viral latency.
• Similarity: The HP1 box is both necessary and sufficient for HP1 binding.The PHD-type zinc finger enhances CEBPB transcriptional activity. The PHD-type zinc finger, the HP1 box and the bromo domain, function together to assemble the machinery required for repression of KRAB domain-containing proteins. Acts as an intramolecular SUMO E3 ligase for autosumoylation of bromodomain.The RING-finger-B Box-coiled-coil/tripartite motif (RBCC/TRIM motif) is required for interaction with the KRAB domain of KRAB-zinc finger proteins. Binds four zinc ions per molecule. The RING finger and the N-terminal of the leucine zipper alpha helical coiled-coil region of RBCC are required for oligomerization.Contains one Pro-Xaa-Val-Xaa-Leu (PxVxL) motif, which is required for interaction with chromoshadow domains. This motif requires additional residues -7, -6, +4 and +5 of the central Val which contact the chromoshadow domain.Belongs to the TRIM/RBCC family.
• Subcellular Location: Nucleus.; Note: Associated with centromeric heterochromatin during cell differentiation through CBX1.
• Preparation and Storage: Store at -20 degree C. Stable for 12 months from date of receipt.

Related Product Information for anti-TIF1beta antibody

Nuclear corepressor for KRAB domain-containing zinc finger proteins (KRAB-ZFPs). Mediates gene silencing by recruiting CHD3, a subunit of the nucleosome remodeling and deacetylation (NuRD) complex, and SETDB1 (which specifically methylates histone H3 at 'Lys-9' (H3K9me)) to the promoter regions of KRAB target genes. Enhances transcriptional repression by coordinating the increase in H3K9me, the decrease in histone H3 'Lys-9 and 'Lys-14' acetylation (H3K9ac and H3K14ac, respectively) and the disposition of HP1 proteins to silence gene expression. Recruitment of SETDB1 induces heterochromatinization. May play a role as a coactivator for CEBPB and NR3C1 in the transcriptional activation of ORM1. Also corepressor for ERBB4. Inhibits E2F1 activity by stimulating E2F1-HDAC1 complex formation and inhibiting E2F1 acetylation. May serve as a partial backup to prevent E2F1-mediated apoptosis in the absence of RB1. Important regulator of CDKN1A/p21 (CIP1). Has E3 SUMO-protein ligase activity toward itself via its PHD-type zinc finger. Also specifically sumoylates IRF7, thereby inhibiting its transactivation activity. Ubiquitinates p53/TP53 leading to its proteosomal degradation; the function is enhanced by MAGEC2 and MAGEA2, and possibly MAGEA3 and MAGEA6. Mediates the nuclear localization of KOX1, ZNF268 and ZNF300 transcription factors. In association with isoform 2 of ZFP90, is required for the transcriptional repressor activity of FOXP3 and the suppressive function of regulatory T-cells (Treg). Probably forms a corepressor complex required for activated KRAS-mediated promoter hypermethylation and transcriptional silencing of tumor suppressor genes (TSGs) or other tumor-related genes in colorectal cancer (CRC) cells. Required to maintain a transcriptionally repressive state of genes in undifferentiated embryonic stem cells (ESCs). In ESCs, in collaboration with SETDB1, is also required for H3K9me3 and silencing of endogenous and introduced retroviruses in a DNA-methylation independent-pathway (By similarity). Associates at promoter regions of tumor suppressor genes (TSGs) leading to their gene silencing. The SETDB1-TRIM28-ZNF274 complex may play a role in recruiting ATRX to the 3'-exons of zinc-finger coding genes with atypical chromatin signatures to establish or maintain/protect H3K9me3 at these transcriptionally active regions. Acts as a corepressor for ZFP568 (By similarity). (Microbial infection) Plays a critical role in the shutdown of lytic gene expression during the early stage of herpes virus 8 primary infection. This inhibition is mediated through interaction with herpes virus 8 protein LANA1.

NCBI and Uniprot Product Information

• NCBI GI #: 3183179
• NCBI GeneID: 10155
• UniProt Accession #: Q13263; O00677; Q7Z632; Q93040; Q96IM1
• Molecular Weight: 835
• NCBI Official Full Name: Transcription intermediary factor 1-beta
• NCBI Official Synonym Full Names: tripartite motif containing 28
• NCBI Official Symbol: TRIM28
• NCBI Official Synonym Symbols: KAP1; TF1B; RNF96; TIF1B; PPP1R157
• NCBI Protein Information: transcription intermediary factor 1-beta; KAP-1; KRIP-1; TIF1-beta; RING finger protein 96; KRAB-associated protein 1; nuclear corepressor KAP-1; KRAB-interacting protein 1; E3 SUMO-protein ligase TRIM28; tripartite motif-containing 28; tripartite motif-c
• UniProt Protein Name: Transcription intermediary factor 1-beta
• UniProt Gene Name: TRIM28
• UniProt Synonym Gene Names: KAP1; RNF96; TIF1B; TIF1-beta; KAP-1; KRIP-1
• UniProt Entry Name: TIF1B_HUMAN

NCBI Description

The protein encoded by this gene mediates transcriptional control by interaction with the Kruppel-associated box repression domain found in many transcription factors. The protein localizes to the nucleus and is thought to associate with specific chromatin regions. The protein is a member of the tripartite motif family. This tripartite motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region. [provided by RefSeq, Jul 2008]

Uniprot Description

TIF1B: an atypical protein kinase that functions as a transcriptional coactivator. Mediates transcriptional regulation by interaction with the Kruppel-associated box (KRAB) repression domain found in many transcription factors. Binds to the negative regulatory domain of c-Myb and negatively regulates the c-Myb-dependent trans-activation. Localizes to the nucleus and is thought to associate with specific chromatin regions. Phosphorylated in an ATM-dependent manner following double-strand breaks. Its phosphorylation in response to DNA damage leads to chromatin relaxation. A member of the tripartite motif family. The tripartite motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region.

Protein type: EC 6.3.2.-; Ligase; Protein kinase, atypical; Ubiquitin conjugating system; Kinase, protein; Ubiquitin ligase; Nuclear receptor co-regulator; Transcription, coactivator/corepressor; ATYPICAL group; TIF1 family

Chromosomal Location of Human Ortholog: 19q13.4

Cellular Component: nucleoplasm; nuclear heterochromatin; nucleus

Molecular Function: protein binding; DNA binding; zinc ion binding; sequence-specific DNA binding; ubiquitin protein ligase binding; transcription coactivator activity; ubiquitin-protein ligase activity; transcription factor activity; transcription corepressor activity; ligase activity; protein kinase activity

Biological Process: transcription initiation from RNA polymerase II promoter; convergent extension involved in axis elongation; positive regulation of DNA repair; protein amino acid autophosphorylation; positive regulation of transcription, DNA-dependent; protein ubiquitination; negative regulation of transcription from RNA polymerase II promoter; DNA repair; protein oligomerization; protein sumoylation; positive regulation of transcription factor import into nucleus; innate immune response; epithelial to mesenchymal transition; gene expression; negative regulation of transcription, DNA-dependent; DNA methylation during embryonic development; embryo implantation