Biology:BRIP1

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Short description: Mammalian protein found in Homo sapiens


A representation of the 3D structure of the protein myoglobin showing turquoise α-helices.
Generic protein structure example

Fanconi anemia group J protein is a protein that in humans is encoded by the BRCA1-interacting protein 1 (BRIP1) gene.[1][2][3]

Function

The protein encoded by this gene is a member of the RecQ DEAH helicase family and interacts with the BRCT repeats of breast cancer, type 1 (BRCA1). The bound complex is important in the normal double-strand break repair function of breast cancer, type 1 (BRCA1). This gene may be a target of germline cancer-inducing mutations.[3]

This protein also appears to be important in ovarian cancer where it seems to act as a tumor suppressor.[4] Mutations in BRIP1 are associated with a 10-15% risk of ovarian cancer.[5]

BRIP1 appears to have an important role in neuronal cells by suppressing oxidative stress, excitotoxicity induced DNA damage, and in protecting the integrity of mitochondria.[6] A deficiency of BRIP1 causes increased DNA damage, mitochondrial abnormalities and neuronal cell death.

DNA repair

BRIP1 protein is a DNA helicase that is employed in homologous recombinational repair, and in the response of the cell to DNA replication stress.[7] In part, BRIP1 carries out its function through interaction with other key DNA repair proteins, specifically MLH1, BRCA1 and BLM.[7] This group of proteins helps to ensuring genome stability, and in particular repairs DNA double-strand breaks during prophase 1 of meiosis.

Interactions

BRIP1 has been shown to interact with BRCA1.[8][9][10][11][12][13]

References

  1. "SUVi and BACH1: a new subfamily of mammalian helicases?". Mutation Research 487 (1–2): 67–71. November 2001. doi:10.1016/s0921-8777(01)00104-5. PMID 11595410. 
  2. "BACH1, a novel helicase-like protein, interacts directly with BRCA1 and contributes to its DNA repair function". Cell 105 (1): 149–160. April 2001. doi:10.1016/S0092-8674(01)00304-X. PMID 11301010. 
  3. 3.0 3.1 "Entrez Gene: BRIP1 BRCA1 interacting protein C-terminal helicase 1". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=83990. 
  4. "Mutations in BRIP1 confer high risk of ovarian cancer". Nature Genetics 43 (11): 1104–1107. October 2011. doi:10.1038/ng.955. PMID 21964575. 
  5. "Current and future role of genetic screening in gynecologic malignancies". American Journal of Obstetrics and Gynecology 217 (5): 512–521. November 2017. doi:10.1016/j.ajog.2017.04.011. PMID 28411145. 
  6. "A Novel Role for BRIP1/FANCJ in Neuronal Cells Health and in Resolving Oxidative Stress-Induced DNA Lesions". Journal of Alzheimer's Disease 85 (1): 207–221. 2022. doi:10.3233/JAD-215305. PMID 34776453. 
  7. 7.0 7.1 "FancJ (Brip1) loss-of-function allele results in spermatogonial cell depletion during embryogenesis and altered processing of crossover sites during meiotic prophase I in mice". Chromosoma 125 (2): 237–252. June 2016. doi:10.1007/s00412-015-0549-2. PMID 26490168. 
  8. "Structural basis of BACH1 phosphopeptide recognition by BRCA1 tandem BRCT domains". Structure 12 (7): 1137–1146. July 2004. doi:10.1016/j.str.2004.06.002. PMID 15242590. 
  9. "Structure of the 53BP1 BRCT region bound to p53 and its comparison to the Brca1 BRCT structure". Genes & Development 16 (5): 583–593. March 2002. doi:10.1101/gad.959202. PMID 11877378. 
  10. "The BRCT domain is a phospho-protein binding domain". Science 302 (5645): 639–642. October 2003. doi:10.1126/science.1088753. PMID 14576433. Bibcode2003Sci...302..639Y. 
  11. "Phosphopeptide binding specificities of BRCA1 COOH-terminal (BRCT) domains". The Journal of Biological Chemistry 278 (52): 52914–52918. December 2003. doi:10.1074/jbc.C300407200. PMID 14578343. 
  12. "Structure and mechanism of BRCA1 BRCT domain recognition of phosphorylated BACH1 with implications for cancer". Nature Structural & Molecular Biology 11 (6): 512–518. June 2004. doi:10.1038/nsmb775. PMID 15133502. 
  13. "BRCA1 function mediates a TRAP/DRIP complex through direct interaction with TRAP220". Oncogene 23 (35): 6000–6005. August 2004. doi:10.1038/sj.onc.1207786. PMID 15208681. 

Further reading

External links

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