Retinoblastoma-like protein 1

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Available structures
PDB Ortholog search: PDBe RCSB
Aliases RBL1, CP107, PRB1, p107, retinoblastoma-like 1, RB transcriptional corepressor like 1
External IDs MGI: 103300 HomoloGene: 2172 GeneCards: 5933
RNA expression pattern
PBB GE RBL1 205296 at tn.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 20: 37 – 37.1 Mb Chr 2: 157.15 – 157.2 Mb
PubMed search [1] [2]
View/Edit Human View/Edit Mouse

Retinoblastoma-like 1 (p107), also known as RBL1, is a protein that in humans is encoded by the RBL1 gene.[3][4]


The protein encoded by this gene is similar in sequence and possibly function to the product of the retinoblastoma 1 (RB1) gene. The RB1 gene product is a tumor suppressor protein that appears to be involved in cell cycle regulation, as it is phosphorylated in the S to M phase transition and is dephosphorylated in the G1 phase of the cell cycle. Both the RB1 protein and the product of this gene can form a complex with adenovirus E1A protein and SV40 Large T-antigen, with the SV40 large T-antigen binding only to the unphosphorylated form of each protein. In addition, both proteins can inhibit the transcription of cell cycle genes containing E2F binding sites in their promoters. Due to the sequence and biochemical similarities with the RB1 protein, it is thought that the protein encoded by this gene may also be a tumor suppressor. Two transcript variants encoding different isoforms have been found for this gene.[3]


Retinoblastoma-like protein 1 has been shown to interact with:

See also[edit]


  1. ^ "Human PubMed Reference:". 
  2. ^ "Mouse PubMed Reference:". 
  3. ^ a b "Entrez Gene: RBL1 retinoblastoma-like 1 (p107)". 
  4. ^ Ewen ME, Xing YG, Lawrence JB, Livingston DM (Sep 1991). "Molecular cloning, chromosomal mapping, and expression of the cDNA for p107, a retinoblastoma gene product-related protein". Cell. 66 (6): 1155–64. doi:10.1016/0092-8674(91)90038-Z. PMID 1833063. 
  5. ^ a b Rual JF, Venkatesan K, Hao T, Hirozane-Kishikawa T, Dricot A, Li N, Berriz GF, Gibbons FD, Dreze M, Ayivi-Guedehoussou N, Klitgord N, Simon C, Boxem M, Milstein S, Rosenberg J, Goldberg DS, Zhang LV, Wong SL, Franklin G, Li S, Albala JS, Lim J, Fraughton C, Llamosas E, Cevik S, Bex C, Lamesch P, Sikorski RS, Vandenhaute J, Zoghbi HY, Smolyar A, Bosak S, Sequerra R, Doucette-Stamm L, Cusick ME, Hill DE, Roth FP, Vidal M (Oct 2005). "Towards a proteome-scale map of the human protein-protein interaction network". Nature. 437 (7062): 1173–8. doi:10.1038/nature04209. PMID 16189514. 
  6. ^ Fan S, Yuan R, Ma YX, Xiong J, Meng Q, Erdos M, Zhao JN, Goldberg ID, Pestell RG, Rosen EM (Aug 2001). "Disruption of BRCA1 LXCXE motif alters BRCA1 functional activity and regulation of RB family but not RB protein binding". Oncogene. 20 (35): 4827–41. doi:10.1038/sj.onc.1204666. PMID 11521194. 
  7. ^ Sutcliffe JE, Cairns CA, McLees A, Allison SJ, Tosh K, White RJ (Jun 1999). "RNA polymerase III transcription factor IIIB is a target for repression by pocket proteins p107 and p130". Molecular and Cellular Biology. 19 (6): 4255–61. doi:10.1128/mcb.19.6.4255. PMC 104385free to read. PMID 10330166. 
  8. ^ a b Dyson N, Dembski M, Fattaey A, Ngwu C, Ewen M, Helin K (Dec 1993). "Analysis of p107-associated proteins: p107 associates with a form of E2F that differs from pRB-associated E2F-1". Journal of Virology. 67 (12): 7641–7. PMC 238233free to read. PMID 8230483. 
  9. ^ a b Joaquin M, Bessa M, Saville MK, Watson RJ (Nov 2002). "B-Myb overcomes a p107-mediated cell proliferation block by interacting with an N-terminal domain of p107". Oncogene. 21 (52): 7923–32. doi:10.1038/sj.onc.1206001. PMID 12439743. 
  10. ^ Shanahan F, Seghezzi W, Parry D, Mahony D, Lees E (Feb 1999). "Cyclin E associates with BAF155 and BRG1, components of the mammalian SWI-SNF complex, and alters the ability of BRG1 to induce growth arrest". Molecular and Cellular Biology. 19 (2): 1460–9. doi:10.1128/mcb.19.2.1460. PMC 116074free to read. PMID 9891079. 
  11. ^ Leng X, Noble M, Adams PD, Qin J, Harper JW (Apr 2002). "Reversal of growth suppression by p107 via direct phosphorylation by cyclin D1/cyclin-dependent kinase 4". Molecular and Cellular Biology. 22 (7): 2242–54. doi:10.1128/mcb.22.7.2242-2254.2002. PMC 133692free to read. PMID 11884610. 
  12. ^ Lai A, Lee JM, Yang WM, DeCaprio JA, Kaelin WG, Seto E, Branton PE (Oct 1999). "RBP1 recruits both histone deacetylase-dependent and -independent repression activities to retinoblastoma family proteins". Molecular and Cellular Biology. 19 (10): 6632–41. doi:10.1128/mcb.19.10.6632. PMC 84642free to read. PMID 10490602. 
  13. ^ Ferreira R, Magnaghi-Jaulin L, Robin P, Harel-Bellan A, Trouche D (Sep 1998). "The three members of the pocket proteins family share the ability to repress E2F activity through recruitment of a histone deacetylase". Proceedings of the National Academy of Sciences of the United States of America. 95 (18): 10493–8. doi:10.1073/pnas.95.18.10493. PMC 27922free to read. PMID 9724731. 
  14. ^ Joaquin M, Watson RJ (Nov 2003). "The cell cycle-regulated B-Myb transcription factor overcomes cyclin-dependent kinase inhibitory activity of p57(KIP2) by interacting with its cyclin-binding domain". The Journal of Biological Chemistry. 278 (45): 44255–64. doi:10.1074/jbc.M308953200. PMID 12947099. 
  15. ^ Chen CR, Kang Y, Siegel PM, Massagué J (Jul 2002). "E2F4/5 and p107 as Smad cofactors linking the TGFbeta receptor to c-myc repression". Cell. 110 (1): 19–32. doi:10.1016/s0092-8674(02)00801-2. PMID 12150994. 
  16. ^ Wang S, Nath N, Adlam M, Chellappan S (Jun 1999). "Prohibitin, a potential tumor suppressor, interacts with RB and regulates E2F function". Oncogene. 18 (23): 3501–10. doi:10.1038/sj.onc.1202684. PMID 10376528. 
  17. ^ Fusco C, Reymond A, Zervos AS (Aug 1998). "Molecular cloning and characterization of a novel retinoblastoma-binding protein". Genomics. 51 (3): 351–8. doi:10.1006/geno.1998.5368. PMID 9721205. 

This article incorporates text from the United States National Library of Medicine, which is in the public domain.

Further reading[edit]

External links[edit]