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词条 Ataxia telangiectasia and Rad3 related
释义

  1. Function

  2. Clinical significance

  3. Aging

  4. Seckel syndrome

  5. Homologous recombinational repair

  6. Drosophila mitosis and meiosis

  7. Interactions

  8. References

  9. Further reading

  10. External links

{{Infobox_gene}}

Serine/threonine-protein kinase ATR also known as ataxia telangiectasia and Rad3-related protein (ATR) or FRAP-related protein 1 (FRP1) is an enzyme that, in humans, is encoded by the ATR gene.[1][2] ATR belongs to the phosphatidylinositol 3-kinase-related kinase protein family. ATR is activated in response to single strand breaks.

Function

ATR is a serine/threonine-specific protein kinase that is involved in sensing DNA damage and activating the DNA damage checkpoint, leading to cell cycle arrest.[3] ATR is activated in response to persistent single-stranded DNA, which is a common intermediate formed during DNA damage detection and repair. Single-stranded DNA occurs at stalled replication forks and as an intermediate in DNA repair pathways such as nucleotide excision repair and homologous recombination repair. ATR works with a partner protein called ATRIP to recognize single-stranded DNA coated with RPA.[4] Once ATR is activated, it phosphorylates Chk1, initiating a signal transduction cascade that culminates in cell cycle arrest. In addition to its role in activating the DNA damage checkpoint, ATR is thought to function in unperturbed DNA replication.[5]

ATR is related to a second checkpoint-activating kinase, ATM, which is activated by double strand breaks in DNA or chromatin disruption.[6]

Clinical significance

Mutations in ATR are responsible for Seckel syndrome, a rare human disorder that shares some characteristics with ataxia telangiectasia, which results from ATM mutation.[7]

ATR is also linked to familial cutaneous telangiectasia and cancer syndrome.[8]

ATR/ChK1 inhibitors can potentiate the effect of DNA cross-linking agents. The first clinical trials using inhibitors of ATR have been initiated by AstraZeneca, preferably in ATM-mutated chronic lymphocytic leukaemia (CLL), prolymphocytic leukaemia (PLL) or B-cell lymphoma patients and by Vertex Pharmaceuticals in advanced solid tumours.[9]

Aging

Deficiency of ATR expression in adult mice leads to the appearance of age-related alterations such as hair graying, hair loss, kyphosis (rounded upper back), osteoporosis and thymic involution.[10] Furthermore, there are dramatic reductions with age in tissue-specific stem and progenitor cells, and exhaustion of tissue renewal and homeostatic capacity.[10] There was also an early and permanent loss of spermatogenesis. However, there was no significant increase in tumor risk.

Seckel syndrome

In humans, hypomorphic mutations (partial loss of gene function) in the ATR gene are linked to Seckel syndrome, a condition characterized by proportionate dwarfism, developmental delay, marked microcephaly, dental malocclusion and thoracic kyphosis.[11] A senile or progeroid appearance has also been frequently noted in Seckel patients.[10]

Homologous recombinational repair

{{main|Homologous recombination}}

Somatic cells of mice deficient in ATR have a decreased frequency of homologous recombination and an increased level of chromosomal damage.[12] This finding implies that ATR is required for homologous recombinational repair of endogenous DNA damage.

Drosophila mitosis and meiosis

Mei-41 is the Drosophila ortholog of ATR.[13] During mitosis in Drosophila DNA damages caused by exogenous agents are repaired by a homologous recombination process that depends on mei-41(ATR). Mutants defective in mei-41(ATR) have increased sensitivity to killing by exposure to the DNA damaging agents UV ,[14] and methyl methanesulfonate.[14][15] Deficiency of mei-41(ATR) also causes reduced spontaneous allelic recombination (crossing over) during meiosis[14] suggesting that wild-type mei-41(ATR) is employed in recombinational repair of spontaneous DNA damages during meiosis.

Interactions

Ataxia telangiectasia and Rad3 related has been shown to interact with:

{{div col|colwidth=20em}}
  • BRCA1,[20][16][17][18]
  • CHD4,[24]
  • HDAC2,[19]
  • MSH2,[20]
  • P53[20][21]
  • RAD17,[22][23] and
  • RHEB.[24]
{{Div col end}}

References

1. ^{{cite journal | vauthors = Cimprich KA, Shin TB, Keith CT, Schreiber SL | title = cDNA cloning and gene mapping of a candidate human cell cycle checkpoint protein | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 93 | issue = 7 | pages = 2850–5 | date = Apr 1996 | pmid = 8610130 | pmc = 39722 | doi = 10.1073/pnas.93.7.2850 }}
2. ^{{cite journal | vauthors = Bentley NJ, Holtzman DA, Flaggs G, Keegan KS, DeMaggio A, Ford JC, Hoekstra M, Carr AM | title = The Schizosaccharomyces pombe rad3 checkpoint gene | journal = The EMBO Journal | volume = 15 | issue = 23 | pages = 6641–51 | date = Dec 1996 | pmid = 8978690 | pmc = 452488 | doi = 10.1002/j.1460-2075.1996.tb01054.x}}
3. ^{{cite journal | vauthors = Sancar A, Lindsey-Boltz LA, Unsal-Kaçmaz K, Linn S | title = Molecular mechanisms of mammalian DNA repair and the DNA damage checkpoints | journal = Annual Review of Biochemistry | volume = 73 | issue = 1 | pages = 39–85 | year = 2004 | pmid = 15189136 | doi = 10.1146/annurev.biochem.73.011303.073723 }}
4. ^{{cite journal | vauthors = Zou L, Elledge SJ | title = Sensing DNA damage through ATRIP recognition of RPA-ssDNA complexes | journal = Science | volume = 300 | issue = 5625 | pages = 1542–8 | date = Jun 2003 | pmid = 12791985 | doi = 10.1126/science.1083430 }}
5. ^{{cite journal | vauthors = Brown EJ, Baltimore D | title = Essential and dispensable roles of ATR in cell cycle arrest and genome maintenance | journal = Genes & Development | volume = 17 | issue = 5 | pages = 615–28 | date = Mar 2003 | pmid = 12629044 | pmc = 196009 | doi = 10.1101/gad.1067403 }}
6. ^{{cite journal | vauthors = Bakkenist CJ, Kastan MB | title = DNA damage activates ATM through intermolecular autophosphorylation and dimer dissociation | journal = Nature | volume = 421 | issue = 6922 | pages = 499–506 | date = Jan 2003 | pmid = 12556884 | doi = 10.1038/nature01368 }}
7. ^{{cite journal | vauthors = O'Driscoll M, Ruiz-Perez VL, Woods CG, Jeggo PA, Goodship JA | title = A splicing mutation affecting expression of ataxia-telangiectasia and Rad3-related protein (ATR) results in Seckel syndrome | journal = Nature Genetics | volume = 33 | issue = 4 | pages = 497–501 | date = Apr 2003 | pmid = 12640452 | doi = 10.1038/ng1129 }}
8. ^{{cite web|title=OMIM Entry - # 614564 - CUTANEOUS TELANGIECTASIA AND CANCER SYNDROME, FAMILIAL; FCTCS|url=https://omim.org/entry/614564|website=omim.org|language=en-us}}
9. ^{{cite journal | vauthors = Llona-Minguez S, Höglund A, Jacques SA, Koolmeister T, Helleday T | title = Chemical strategies for development of ATR inhibitors | journal = Expert Reviews in Molecular Medicine | volume = 16 | issue = e10 | pages = e10 | date = May 2014 | pmid = 24810715 | doi = 10.1017/erm.2014.10 }}
10. ^1 2 {{cite journal |vauthors=Ruzankina Y, Pinzon-Guzman C, Asare A, Ong T, Pontano L, Cotsarelis G, Zediak VP, Velez M, Bhandoola A, Brown EJ |title=Deletion of the developmentally essential gene ATR in adult mice leads to age-related phenotypes and stem cell loss |journal=Cell Stem Cell |volume=1 |issue=1 |pages=113–26 |year=2007 |pmid=18371340 |pmc=2920603 |doi=10.1016/j.stem.2007.03.002 |url=}}
11. ^{{cite journal |vauthors=O'Driscoll M, Jeggo PA |title=The role of double-strand break repair - insights from human genetics |journal=Nat. Rev. Genet. |volume=7 |issue=1 |pages=45–54 |year=2006 |pmid=16369571 |doi=10.1038/nrg1746 |url=}}
12. ^{{cite journal |vauthors=Brown AD, Sager BW, Gorthi A, Tonapi SS, Brown EJ, Bishop AJ |title=ATR suppresses endogenous DNA damage and allows completion of homologous recombination repair |journal=PLoS ONE |volume=9 |issue=3 |pages=e91222 |year=2014 |pmid=24675793 |pmc=3968013 |doi=10.1371/journal.pone.0091222 |url=}}
13. ^{{cite journal |vauthors=Shim HJ, Lee EM, Nguyen LD, Shim J, Song YH |title=High-dose irradiation induces cell cycle arrest, apoptosis, and developmental defects during Drosophila oogenesis |journal=PLoS ONE |volume=9 |issue=2 |pages=e89009 |year=2014 |pmid=24551207 |pmc=3923870 |doi=10.1371/journal.pone.0089009 |url=}}
14. ^1 2 {{cite journal |authorlink1=Bruce Baker (geneticist)|vauthors=Baker BS, Boyd JB, Carpenter AT, Green MM, Nguyen TD, Ripoll P, Smith PD |title=Genetic controls of meiotic recombination and somatic DNA metabolism in Drosophila melanogaster |journal=Proc. Natl. Acad. Sci. U.S.A. |volume=73 |issue=11 |pages=4140–4 |year=1976 |pmid=825857 |pmc=431359 |doi= 10.1073/pnas.73.11.4140|url=}}
15. ^{{cite journal |vauthors=Rasmuson A |title=Effects of DNA-repair-deficient mutants on somatic and germ line mutagenesis in the UZ system in Drosophila melanogaster |journal=Mutat. Res. |volume=141 |issue=1 |pages=29–33 |year=1984 |pmid=6090892 |doi= 10.1016/0165-7992(84)90033-2|url=}}
16. ^{{cite journal | vauthors = Tibbetts RS, Cortez D, Brumbaugh KM, Scully R, Livingston D, Elledge SJ, Abraham RT | title = Functional interactions between BRCA1 and the checkpoint kinase ATR during genotoxic stress | journal = Genes & Development | volume = 14 | issue = 23 | pages = 2989–3002 | date = Dec 2000 | pmid = 11114888 | pmc = 317107 | doi = 10.1101/gad.851000 }}
17. ^{{cite journal | vauthors = Chen J | title = Ataxia telangiectasia-related protein is involved in the phosphorylation of BRCA1 following deoxyribonucleic acid damage | journal = Cancer Research | volume = 60 | issue = 18 | pages = 5037–9 | date = Sep 2000 | pmid = 11016625 | doi = }}
18. ^{{cite journal | vauthors = Gatei M, Zhou BB, Hobson K, Scott S, Young D, Khanna KK | title = Ataxia telangiectasia mutated (ATM) kinase and ATM and Rad3 related kinase mediate phosphorylation of Brca1 at distinct and overlapping sites. In vivo assessment using phospho-specific antibodies | journal = The Journal of Biological Chemistry | volume = 276 | issue = 20 | pages = 17276–80 | date = May 2001 | pmid = 11278964 | doi = 10.1074/jbc.M011681200 }}
19. ^1 {{cite journal | vauthors = Schmidt DR, Schreiber SL | title = Molecular association between ATR and two components of the nucleosome remodeling and deacetylating complex, HDAC2 and CHD4 | journal = Biochemistry | volume = 38 | issue = 44 | pages = 14711–7 | date = Nov 1999 | pmid = 10545197 | doi = 10.1021/bi991614n | citeseerx = 10.1.1.559.7745 }}
20. ^{{cite journal | vauthors = Wang Y, Qin J | title = MSH2 and ATR form a signaling module and regulate two branches of the damage response to DNA methylation | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 100 | issue = 26 | pages = 15387–92 | date = Dec 2003 | pmid = 14657349 | pmc = 307577 | doi = 10.1073/pnas.2536810100 }}
21. ^{{cite journal | vauthors = Fabbro M, Savage K, Hobson K, Deans AJ, Powell SN, McArthur GA, Khanna KK | title = BRCA1-BARD1 complexes are required for p53Ser-15 phosphorylation and a G1/S arrest following ionizing radiation-induced DNA damage | journal = The Journal of Biological Chemistry | volume = 279 | issue = 30 | pages = 31251–8 | date = Jul 2004 | pmid = 15159397 | doi = 10.1074/jbc.M405372200 }}
22. ^1 2 {{cite journal | vauthors = Kim ST, Lim DS, Canman CE, Kastan MB | title = Substrate specificities and identification of putative substrates of ATM kinase family members | journal = The Journal of Biological Chemistry | volume = 274 | issue = 53 | pages = 37538–43 | date = Dec 1999 | pmid = 10608806 | doi = 10.1074/jbc.274.53.37538 }}
23. ^{{cite journal | vauthors = Bao S, Tibbetts RS, Brumbaugh KM, Fang Y, Richardson DA, Ali A, Chen SM, Abraham RT, Wang XF | title = ATR/ATM-mediated phosphorylation of human Rad17 is required for genotoxic stress responses | journal = Nature | volume = 411 | issue = 6840 | pages = 969–74 | date = Jun 2001 | pmid = 11418864 | doi = 10.1038/35082110 }}
24. ^{{cite journal | vauthors = Long X, Lin Y, Ortiz-Vega S, Yonezawa K, Avruch J | title = Rheb binds and regulates the mTOR kinase | journal = Current Biology | volume = 15 | issue = 8 | pages = 702–13 | date = Apr 2005 | pmid = 15854902 | doi = 10.1016/j.cub.2005.02.053 }}

Further reading

{{Refbegin|35em}}
  • {{cite journal | vauthors = Giaccia AJ, Kastan MB | title = The complexity of p53 modulation: emerging patterns from divergent signals | journal = Genes & Development | volume = 12 | issue = 19 | pages = 2973–83 | date = Oct 1998 | pmid = 9765199 | doi = 10.1101/gad.12.19.2973 }}
  • {{cite journal | vauthors = Shiloh Y | title = ATM and ATR: networking cellular responses to DNA damage | journal = Current Opinion in Genetics & Development | volume = 11 | issue = 1 | pages = 71–7 | date = Feb 2001 | pmid = 11163154 | doi = 10.1016/S0959-437X(00)00159-3 }}
  • {{cite journal | vauthors = Kastan MB, Lim DS | title = The many substrates and functions of ATM | journal = Nature Reviews Molecular Cell Biology | volume = 1 | issue = 3 | pages = 179–86 | date = Dec 2000 | pmid = 11252893 | doi = 10.1038/35043058 }}
  • {{cite journal | vauthors = Abraham RT | title = The ATM-related kinase, hSMG-1, bridges genome and RNA surveillance pathways | journal = DNA Repair | volume = 3 | issue = 8–9 | pages = 919–25 | year = 2005 | pmid = 15279777 | doi = 10.1016/j.dnarep.2004.04.003 }}
  • {{cite journal | vauthors = Li L, Li HS, Pauza CD, Bukrinsky M, Zhao RY | title = Roles of HIV-1 auxiliary proteins in viral pathogenesis and host-pathogen interactions | journal = Cell Research | volume = 15 | issue = 11–12 | pages = 923–34 | year = 2006 | pmid = 16354571 | doi = 10.1038/sj.cr.7290370 }}
{{Refend}}

External links

  • Drosophila meiotic-41 - The Interactive Fly
  • {{UCSC gene info|ATR}}
{{Serine/threonine-specific protein kinases}}{{Enzymes}}{{Portal bar|Molecular and Cellular Biology|border=no}}{{Intracellular signaling peptides and proteins}}

2 : Proteins|EC 2.7.11
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