Exon 17 tumor GOS561 substitution mutation causes premature stop; GOS563 exon 17 substitution mutation causes premature stop; OSRC; Osteosarcoma; p105-Rb; P105RB; PP105; pp110; PPP1R130; pRb; Prepro retinoblastoma associated protein; Protein phosphatase 1 regulatory subunit 130; Rb; RB transcriptional corepressor 1; RB_HUMAN; RB1; RB1 gene; Retinoblastoma 1; Retinoblastoma suspectibility protein; Retinoblastoma-associated protein;
WB 1:500-1:2000 IF/ICC 1:100-1:500, ELISA(peptide) 1:20000-1:40000
The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho- and non-phospho-peptide affinity columns.
Phospho-Retinoblastoma(Thr826) Antibody detects endogenous levels of Retinoblastoma only when phosphorylated at Threonine 826.
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.Store at -20 °C.Stable for 12 months from date of receipt.
A synthesized peptide derived from human Retinoblastoma around the phosphorylation site of Threonine 826.
Observed Mol.Wt.: 110kDa.
Predicted Mol.Wt.: 107kDa.
Expressed in the retina.
Retinoblastoma (RB) is an embryonic malignant neoplasm of retinal origin. It almost always presents in early childhood and is often bilateral. Spontaneous regression ('cure') occurs in some cases.
10 20 30 40 50
MPPKTPRKTA ATAAAAAAEP PAPPPPPPPE EDPEQDSGPE DLPLVRLEFE
60 70 80 90 100
ETEEPDFTAL CQKLKIPDHV RERAWLTWEK VSSVDGVLGG YIQKKKELWG
110 120 130 140 150
ICIFIAAVDL DEMSFTFTEL QKNIEISVHK FFNLLKEIDT STKVDNAMSR
160 170 180 190 200
LLKKYDVLFA LFSKLERTCE LIYLTQPSSS ISTEINSALV LKVSWITFLL
210 220 230 240 250
AKGEVLQMED DLVISFQLML CVLDYFIKLS PPMLLKEPYK TAVIPINGSP
260 270 280 290 300
RTPRRGQNRS ARIAKQLEND TRIIEVLCKE HECNIDEVKN VYFKNFIPFM
310 320 330 340 350
NSLGLVTSNG LPEVENLSKR YEEIYLKNKD LDARLFLDHD KTLQTDSIDS
360 370 380 390 400
FETQRTPRKS NLDEEVNVIP PHTPVRTVMN TIQQLMMILN SASDQPSENL
410 420 430 440 450
ISYFNNCTVN PKESILKRVK DIGYIFKEKF AKAVGQGCVE IGSQRYKLGV
460 470 480 490 500
RLYYRVMESM LKSEEERLSI QNFSKLLNDN IFHMSLLACA LEVVMATYSR
510 520 530 540 550
STSQNLDSGT DLSFPWILNV LNLKAFDFYK VIESFIKAEG NLTREMIKHL
560 570 580 590 600
ERCEHRIMES LAWLSDSPLF DLIKQSKDRE GPTDHLESAC PLNLPLQNNH
610 620 630 640 650
TAADMYLSPV RSPKKKGSTT RVNSTANAET QATSAFQTQK PLKSTSLSLF
660 670 680 690 700
YKKVYRLAYL RLNTLCERLL SEHPELEHII WTLFQHTLQN EYELMRDRHL
710 720 730 740 750
DQIMMCSMYG ICKVKNIDLK FKIIVTAYKD LPHAVQETFK RVLIKEEEYD
760 770 780 790 800
SIIVFYNSVF MQRLKTNILQ YASTRPPTLS PIPHIPRSPY KFPSSPLRIP
810 820 830 840 850
GGNIYISPLK SPYKISEGLP TPTKMTPRSR ILVSIGESFG TSEKFQKINQ
860 870 880 890 900
MVCNSDRVLK RSAEGSNPPK PLKKLRFDIE GSDEADGSKH LPGESKFQQK
LAEMTSTRTR MQKQKMNDSM DTSNKEEK
Key regulator of entry into cell division that acts as a tumor suppressor. Promotes G0-G1 transition when phosphorylated by CDK3/cyclin-C. Acts as a transcription repressor of E2F1 target genes. The underphosphorylated, active form of RB1 interacts with E2F1 and represses its transcription activity, leading to cell cycle arrest. Directly involved in heterochromatin formation by maintaining overall chromatin structure and, in particular, that of constitutive heterochromatin by stabilizing histone methylation. Recruits and targets histone methyltransferases SUV39H1, KMT5B and KMT5C, leading to epigenetic transcriptional repression. Controls histone H4 'Lys-20' trimethylation. Inhibits the intrinsic kinase activity of TAF1. Mediates transcriptional repression by SMARCA4/BRG1 by recruiting a histone deacetylase (HDAC) complex to the c-FOS promoter. In resting neurons, transcription of the c-FOS promoter is inhibited by BRG1-dependent recruitment of a phospho-RB1-HDAC1 repressor complex. Upon calcium influx, RB1 is dephosphorylated by calcineurin, which leads to release of the repressor complex (By similarity). In case of viral infections, interactions with SV40 large T antigen, HPV E7 protein or adenovirus E1A protein induce the disassembly of RB1-E2F1 complex thereby disrupting RB1's activity.
Phosphorylated by CDK6 and CDK4, and subsequently by CDK2 at Ser-567 in G1, thereby releasing E2F1 which is then able to activate cell growth. Dephosphorylated at the late M phase. SV40 large T antigen, HPV E7 and adenovirus E1A bind to the underphosphorylated, active form of pRb. Phosphorylation at Thr-821 and Thr-826 promotes interaction between the C-terminal domain C and the Pocket domain, and thereby inhibits interactions with heterodimeric E2F/DP transcription factor complexes. Dephosphorylated at Ser-795 by calcineruin upon calcium stimulation. CDK3/cyclin-C-mediated phosphorylation at Ser-807 and Ser-811 is required for G0-G1 transition. Phosphorylated by CDK1 and CDK2 upon TGFB1-mediated apoptosis (By similarity).N-terminus is methylated by METTL11A/NTM1 (By similarity). Monomethylation at Lys-810 by SMYD2 enhances phosphorylation at Ser-807 and Ser-811, and promotes cell cycle progression. Monomethylation at Lys-860 by SMYD2 promotes interaction with L3MBTL1.Acetylation at Lys-873 and Lys-874 regulates subcellular localization, at least during keratinocytes differentiation.
Interacts with ATAD5. Interacts with PRMT2, CDK1 and CDK2 (By similarity). The hypophosphorylated form interacts with and sequesters the E2F1 transcription factor. Interacts with heterodimeric E2F/DP transcription factor complexes containing TFDP1 and either E2F1, E2F3, E2F4 or E2F5, or TFDP2 and E2F4. The unphosphorylated form interacts with EID1, ARID3B, KDM5A, SUV39H1, MJD2A/JHDM3A and THOC1. Interacts with the N-terminal domain of TAF1. Interacts with SNW1, AATF, DNMT1, LIN9, LMNA, KMT5B, KMT5C, PELP1, UHRF2 and TMPO-alpha. May interact with NDC80. Interacts with GRIP1 and UBR4. Interacts with ARID4A and KDM5B. Interacts with E4F1 and LIMD1. Interacts with SMARCA4/BRG1 AND HDAC1 (By similarity). Interacts with PSMA3 and USP4. Interacts (when methylated at Lys-860) with L3MBTL1. Interacts with CHEK2; phosphorylates RB1. Interacts with CEBPA (PubMed:15107404). Interacts with adenovirus E1A protein, HPV E7 protein and SV40 large T antigen. Interacts with human cytomegalovirus/HHV-5 protein UL123. P-TEFB complex interacts with RB1; promotes phosphorylation of RB1 (PubMed:12037672).
The Pocket domain binds to the threonine-phosphorylated domain C, thereby preventing interaction with heterodimeric E2F/DP transcription factor complexes.Belongs to the retinoblastoma protein (RB) family.
· Cellular Processes > Cell growth and death > Cell cycle.(View pathway)
· Cellular Processes > Cell growth and death > Cellular senescence.(View pathway)
· Human Diseases > Cancers: Specific types > Pancreatic cancer.(View pathway)
· Human Diseases > Cancers: Specific types > Bladder cancer.(View pathway)
· Human Diseases > Cancers: Overview > Pathways in cancer.(View pathway)
· Human Diseases > Cancers: Specific types > Gastric cancer.(View pathway)
· Human Diseases > Cancers: Specific types > Non-small cell lung cancer.(View pathway)
· Human Diseases > Cancers: Specific types > Glioma.(View pathway)
· Human Diseases > Cancers: Specific types > Hepatocellular carcinoma.(View pathway)
· Human Diseases > Cancers: Specific types > Breast cancer.(View pathway)
· Human Diseases > Cancers: Specific types > Chronic myeloid leukemia.(View pathway)
· Human Diseases > Cancers: Specific types > Small cell lung cancer.(View pathway)
· Human Diseases > Cancers: Overview > Viral carcinogenesis.
· Human Diseases > Infectious diseases: Viral > Hepatitis B.
· Human Diseases > Cancers: Specific types > Melanoma.(View pathway)
· Human Diseases > Infectious diseases: Viral > Human papillomavirus infection.
· Human Diseases > Infectious diseases: Viral > Epstein-Barr virus infection.
· Human Diseases > Infectious diseases: Viral > HTLV-I infection.
· Human Diseases > Drug resistance: Antineoplastic > Endocrine resistance.
· Human Diseases > Cancers: Specific types > Prostate cancer.(View pathway)
Application: WB 1/1000 Species: human; Sample:Not available;
Figure 3. Differential expression patterns of p-RB, p16, p53, p21 and p-ERK in endometrial cancer cells. (A) Western blotting images of related proteins.
Tips: For phospho antibody, we provide phospho peptide（0.5mg) and non-phospho peptide(0.5mg).
Blocking peptides are peptides that bind specifically to the target antibody and block antibody binding. These peptide usually contains the epitope recognized by the antibody. Antibodies bound to the blocking peptide no longer bind to the epitope on the target protein. This mechanism is useful when non-specific binding is an issue, for example, in Western blotting (immunoblot) and immunohistochemistry (IHC). By comparing the staining from the blocked antibody versus the antibody alone, one can see which staining is specific; Specific binding will be absent from the western blot or immunostaining performed with the neutralized antibody.
Synthetic peptide was lyophilized with 100% acetonitrile and is supplied as a powder. Reconstitute with 0.1 ml DI water for a final concentration of 1 mg/ml.The purity is >90%,tested by HPLC and MS.Storage Maintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C.
This product is for research use only. Not for use in diagnostic or therapeutic procedures.