3al3

Structural highlights

Disease

[FANCJ_HUMAN] Defects in BRIP1 are a cause of susceptibility to breast cancer (BC) [MIM:114480]. A common malignancy originating from breast epithelial tissue. Breast neoplasms can be distinguished by their histologic pattern. Invasive ductal carcinoma is by far the most common type. Breast cancer is etiologically and genetically heterogeneous. Important genetic factors have been indicated by familial occurrence and bilateral involvement. Mutations at more than one locus can be involved in different families or even in the same case.^{[1] [2] [3] [4]} Defects in BRIP1 are the cause of Fanconi anemia complementation group J (FANCJ) [MIM:609054]. It is a disorder affecting all bone marrow elements and resulting in anemia, leukopenia and thrombopenia. It is associated with cardiac, renal and limb malformations, dermal pigmentary changes, and a predisposition to the development of malignancies. At the cellular level it is associated with hypersensitivity to DNA-damaging agents, chromosomal instability (increased chromosome breakage) and defective DNA repair.^{[5] [6] [7] [8] [9]}

Function

[TOPB1_HUMAN] Required for DNA replication. Plays a role in the rescue of stalled replication forks and checkpoint control. Binds double-stranded DNA breaks and nicks as well as single-stranded DNA. Recruits the SWI/SNF chromatin remodeling complex to E2F1-responsive promoters. Down-regulates E2F1 activity and inhibits E2F1-dependent apoptosis during G1/S transition and after DNA damage. Induces a large increase in the kinase activity of ATR.^{[10] [11] [12] [13] [14] [15]} [FANCJ_HUMAN] DNA-dependent ATPase and 5' to 3' DNA helicase required for the maintenance of chromosomal stability. Acts late in the Fanconi anemia pathway, after FANCD2 ubiquitination. Involved in the repair of DNA double-strand breaks by homologous recombination in a manner that depends on its association with BRCA1.^{[16] [17] [18] [19]}

See Also

• Topoisomerase binding protein

References

1. ↑ Cantor SB, Bell DW, Ganesan S, Kass EM, Drapkin R, Grossman S, Wahrer DC, Sgroi DC, Lane WS, Haber DA, Livingston DM. BACH1, a novel helicase-like protein, interacts directly with BRCA1 and contributes to its DNA repair function. Cell. 2001 Apr 6;105(1):149-60. PMID:11301010
2. ↑ Cantor S, Drapkin R, Zhang F, Lin Y, Han J, Pamidi S, Livingston DM. The BRCA1-associated protein BACH1 is a DNA helicase targeted by clinically relevant inactivating mutations. Proc Natl Acad Sci U S A. 2004 Feb 24;101(8):2357-62. PMID:14983014
3. ↑ Litman R, Peng M, Jin Z, Zhang F, Zhang J, Powell S, Andreassen PR, Cantor SB. BACH1 is critical for homologous recombination and appears to be the Fanconi anemia gene product FANCJ. Cancer Cell. 2005 Sep;8(3):255-65. PMID:16153896 doi:S1535-6108(05)00262-X
4. ↑ Bridge WL, Vandenberg CJ, Franklin RJ, Hiom K. The BRIP1 helicase functions independently of BRCA1 in the Fanconi anemia pathway for DNA crosslink repair. Nat Genet. 2005 Sep;37(9):953-7. Epub 2005 Aug 21. PMID:16116421 doi:10.1038/ng1627
5. ↑ Litman R, Peng M, Jin Z, Zhang F, Zhang J, Powell S, Andreassen PR, Cantor SB. BACH1 is critical for homologous recombination and appears to be the Fanconi anemia gene product FANCJ. Cancer Cell. 2005 Sep;8(3):255-65. PMID:16153896 doi:S1535-6108(05)00262-X
6. ↑ Bridge WL, Vandenberg CJ, Franklin RJ, Hiom K. The BRIP1 helicase functions independently of BRCA1 in the Fanconi anemia pathway for DNA crosslink repair. Nat Genet. 2005 Sep;37(9):953-7. Epub 2005 Aug 21. PMID:16116421 doi:10.1038/ng1627
7. ↑ Wu Y, Sommers JA, Suhasini AN, Leonard T, Deakyne JS, Mazin AV, Shin-Ya K, Kitao H, Brosh RM Jr. Fanconi anemia group J mutation abolishes its DNA repair function by uncoupling DNA translocation from helicase activity or disruption of protein-DNA complexes. Blood. 2010 Nov 11;116(19):3780-91. doi: 10.1182/blood-2009-11-256016. Epub 2010 , Jul 16. PMID:20639400 doi:10.1182/blood-2009-11-256016
8. ↑ Levran O, Attwooll C, Henry RT, Milton KL, Neveling K, Rio P, Batish SD, Kalb R, Velleuer E, Barral S, Ott J, Petrini J, Schindler D, Hanenberg H, Auerbach AD. The BRCA1-interacting helicase BRIP1 is deficient in Fanconi anemia. Nat Genet. 2005 Sep;37(9):931-3. Epub 2005 Aug 21. PMID:16116424 doi:10.1038/ng1624
9. ↑ Levitus M, Waisfisz Q, Godthelp BC, de Vries Y, Hussain S, Wiegant WW, Elghalbzouri-Maghrani E, Steltenpool J, Rooimans MA, Pals G, Arwert F, Mathew CG, Zdzienicka MZ, Hiom K, De Winter JP, Joenje H. The DNA helicase BRIP1 is defective in Fanconi anemia complementation group J. Nat Genet. 2005 Sep;37(9):934-5. Epub 2005 Aug 21. PMID:16116423 doi:ng1625
10. ↑ Yamane K, Tsuruo T. Conserved BRCT regions of TopBP1 and of the tumor suppressor BRCA1 bind strand breaks and termini of DNA. Oncogene. 1999 Sep 16;18(37):5194-203. PMID:10498869 doi:10.1038/sj.onc.1202922
11. ↑ Makiniemi M, Hillukkala T, Tuusa J, Reini K, Vaara M, Huang D, Pospiech H, Majuri I, Westerling T, Makela TP, Syvaoja JE. BRCT domain-containing protein TopBP1 functions in DNA replication and damage response. J Biol Chem. 2001 Aug 10;276(32):30399-406. Epub 2001 Jun 6. PMID:11395493 doi:10.1074/jbc.M102245200
12. ↑ Honda Y, Tojo M, Matsuzaki K, Anan T, Matsumoto M, Ando M, Saya H, Nakao M. Cooperation of HECT-domain ubiquitin ligase hHYD and DNA topoisomerase II-binding protein for DNA damage response. J Biol Chem. 2002 Feb 1;277(5):3599-605. Epub 2001 Nov 19. PMID:11714696 doi:10.1074/jbc.M104347200
13. ↑ Liu K, Lin FT, Ruppert JM, Lin WC. Regulation of E2F1 by BRCT domain-containing protein TopBP1. Mol Cell Biol. 2003 May;23(9):3287-304. PMID:12697828
14. ↑ Liu K, Luo Y, Lin FT, Lin WC. TopBP1 recruits Brg1/Brm to repress E2F1-induced apoptosis, a novel pRb-independent and E2F1-specific control for cell survival. Genes Dev. 2004 Mar 15;18(6):673-86. PMID:15075294 doi:10.1101/gad.1180204
15. ↑ Kumagai A, Lee J, Yoo HY, Dunphy WG. TopBP1 activates the ATR-ATRIP complex. Cell. 2006 Mar 10;124(5):943-55. PMID:16530042 doi:10.1016/j.cell.2005.12.041
16. ↑ Cantor SB, Bell DW, Ganesan S, Kass EM, Drapkin R, Grossman S, Wahrer DC, Sgroi DC, Lane WS, Haber DA, Livingston DM. BACH1, a novel helicase-like protein, interacts directly with BRCA1 and contributes to its DNA repair function. Cell. 2001 Apr 6;105(1):149-60. PMID:11301010
17. ↑ Cantor S, Drapkin R, Zhang F, Lin Y, Han J, Pamidi S, Livingston DM. The BRCA1-associated protein BACH1 is a DNA helicase targeted by clinically relevant inactivating mutations. Proc Natl Acad Sci U S A. 2004 Feb 24;101(8):2357-62. PMID:14983014
18. ↑ Litman R, Peng M, Jin Z, Zhang F, Zhang J, Powell S, Andreassen PR, Cantor SB. BACH1 is critical for homologous recombination and appears to be the Fanconi anemia gene product FANCJ. Cancer Cell. 2005 Sep;8(3):255-65. PMID:16153896 doi:S1535-6108(05)00262-X
19. ↑ Bridge WL, Vandenberg CJ, Franklin RJ, Hiom K. The BRIP1 helicase functions independently of BRCA1 in the Fanconi anemia pathway for DNA crosslink repair. Nat Genet. 2005 Sep;37(9):953-7. Epub 2005 Aug 21. PMID:16116421 doi:10.1038/ng1627
20. ↑ Leung CC, Gong Z, Chen J, Glover JN. Molecular basis of BACH1/FANCJ recognition by TopBP1 in DNA replication checkpoint control. J Biol Chem. 2011 Feb 11;286(6):4292-301. Epub 2010 Dec 2. PMID:21127055 doi:10.1074/jbc.M110.189555