RAD51-mediated R-loop formation acts to repair transcription-associated DNA breaks driving antigenic variation in Trypanosoma brucei .

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    • Source:
      Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE
    • Publication Information:
      Original Publication: Washington, DC : National Academy of Sciences
    • Subject Terms:
    • Abstract:
      RNA-DNA hybrids are epigenetic features of all genomes that intersect with many processes, including transcription, telomere homeostasis, and centromere function. Increasing evidence suggests that RNA-DNA hybrids can provide two conflicting roles in the maintenance and transmission of genomes: They can be the triggers of DNA damage, leading to genome change, or can aid the DNA repair processes needed to respond to DNA lesions. Evasion of host immunity by African trypanosomes, such as Trypanosoma brucei , relies on targeted recombination of silent Variant Surface Glycoprotein ( VSG ) genes into a specialized telomeric locus that directs transcription of just one VSG from thousands. How such VSG recombination is targeted and initiated is unclear. Here, we show that a key enzyme of T. brucei homologous recombination, RAD51, interacts with RNA-DNA hybrids. In addition, we show that RNA-DNA hybrids display a genome-wide colocalization with DNA breaks and that this relationship is impaired by mutation of RAD51. Finally, we show that RAD51 acts to repair highly abundant, localised DNA breaks at the single transcribed VSG and that mutation of RAD51 alters RNA-DNA hybrid abundance at 70 bp repeats both around the transcribed VSG and across the silent VSG archive. This work reveals a widespread, generalised role for RNA-DNA hybrids in directing RAD51 activity during recombination and uncovers a specialised application of this interplay during targeted DNA break repair needed for the critical T. brucei immune evasion reaction of antigenic variation.
      Competing Interests: Competing interests statement:The authors declare no competing interest.
    • References:
      Cell. 2021 Mar 4;184(5):1314-1329.e10. (PMID: 33626331)
      NAR Cancer. 2020 Sep;2(3):zcaa028. (PMID: 33015627)
      Microbiol Spectr. 2014 Oct;2(5):. (PMID: 26104357)
      Mol Microbiol. 2002 Sep;45(6):1687-700. (PMID: 12354234)
      Cell Rep. 2020 May 5;31(5):107603. (PMID: 32375052)
      Essays Biochem. 2020 Oct 26;64(5):721-735. (PMID: 32618336)
      Nat Commun. 2017 Apr 21;8:15025. (PMID: 28429714)
      Mol Microbiol. 2008 Jun;68(5):1237-51. (PMID: 18430140)
      Trends Parasitol. 2007 Sep;23(9):408-13. (PMID: 17662656)
      Cell Rep. 2020 Jan 21;30(3):836-851.e5. (PMID: 31968257)
      BMC Genomics. 2012 Jan 18;13:29. (PMID: 22257693)
      J Mol Biol. 2017 May 5;429(9):1277-1288. (PMID: 28363678)
      Nat Commun. 2018 Dec 18;9(1):5376. (PMID: 30560944)
      PLoS Biol. 2012;10(3):e1001287. (PMID: 22479148)
      Nat Struct Mol Biol. 2015 Nov;22(11):853-8. (PMID: 26581519)
      Microbiol Spectr. 2015 Apr;3(2):MDNA3-0016-2014. (PMID: 26104717)
      EMBO J. 2021 Apr 1;40(7):e106018. (PMID: 33634895)
      Mol Cell. 2019 Jul 25;75(2):267-283.e12. (PMID: 31202576)
      Cell. 2010 Jun 11;141(6):970-81. (PMID: 20550933)
      Trends Cell Biol. 2015 Sep;25(9):514-22. (PMID: 26045257)
      Cell Rep. 2018 May 8;23(6):1891-1905. (PMID: 29742442)
      Mol Microbiol. 2013 Jan;87(1):196-210. (PMID: 23216794)
      Cell Death Dis. 2020 Apr 24;11(4):280. (PMID: 32332801)
      PLoS Biol. 2014 May 20;12(5):e1001868. (PMID: 24844805)
      Nucleic Acids Res. 2014 Nov 10;42(20):12899-911. (PMID: 25313155)
      Biochemistry. 2020 Mar 17;59(10):1104-1112. (PMID: 32078293)
      PLoS Genet. 2018 Dec 13;14(12):e1007729. (PMID: 30543624)
      Nature. 2020 Nov;587(7833):303-308. (PMID: 33057192)
      Mol Cell. 2009 Aug 28;35(4):403-13. (PMID: 19716786)
      Nat Protoc. 2020 Dec;15(12):3894-3941. (PMID: 33139954)
      PLoS One. 2016 Jun 03;11(6):e0156746. (PMID: 27258069)
      Nat Struct Mol Biol. 2017 Apr;24(4):353-361. (PMID: 28263325)
      Eukaryot Cell. 2006 Dec;5(12):2114-9. (PMID: 17071826)
      Mol Biochem Parasitol. 1996 Feb-Mar;76(1-2):115-23. (PMID: 8920000)
      Curr Opin Microbiol. 2022 Dec;70:102209. (PMID: 36215868)
      Nucleic Acids Res. 1984 Mar 26;12(6):2759-74. (PMID: 6324125)
      Mol Cell Biol. 2006 Jul;26(13):4911-9. (PMID: 16782879)
      Nat Commun. 2020 Jun 18;11(1):3088. (PMID: 32555206)
      Microbiol Spectr. 2015 Apr;3(2):MDNA3-0013-2014. (PMID: 26104712)
      Nat Rev Genet. 2015 Oct;16(10):583-97. (PMID: 26370899)
      Cell. 2016 Nov 3;167(4):1001-1013.e7. (PMID: 27881299)
      Oncogenesis. 2020 Jun 15;9(6):60. (PMID: 32541651)
      PLoS Pathog. 2021 Nov 12;17(11):e1010038. (PMID: 34767618)
      EMBO Rep. 2015 Aug;16(8):986-94. (PMID: 26142279)
      J Mol Biol. 2017 Oct 27;429(21):3132-3138. (PMID: 27452366)
      Mol Biochem Parasitol. 1987 Jun;24(2):163-74. (PMID: 3041210)
      Nat Commun. 2019 May 24;10(1):2313. (PMID: 31127121)
      PLoS Pathog. 2013 Mar;9(3):e1003260. (PMID: 23555264)
      Proc Natl Acad Sci U S A. 2015 May 5;112(18):5779-84. (PMID: 25902524)
      Cell. 2017 Jun 29;170(1):72-85.e14. (PMID: 28666126)
      Trends Genet. 2016 Dec;32(12):828-838. (PMID: 27793359)
      Nucleic Acids Res. 2018 Dec 14;46(22):11789-11805. (PMID: 30304482)
      Mol Cell. 2017 Jan 19;65(2):272-284. (PMID: 28107649)
      Trends Parasitol. 2014 Sep;30(9):429-35. (PMID: 25073852)
      PLoS Pathog. 2012;8(8):e1002900. (PMID: 22952449)
      Cell Microbiol. 2009 Dec;11(12):1724-34. (PMID: 19751359)
      Nucleic Acids Res. 2005 Dec 02;33(21):6906-19. (PMID: 16326865)
      Curr Genet. 2017 Jun;63(3):441-449. (PMID: 27822899)
      Sci Rep. 2016 May 10;6:25866. (PMID: 27160357)
      Elife. 2016 Dec 10;5:. (PMID: 27938663)
      Genome Res. 2007 Sep;17(9):1344-52. (PMID: 17652423)
      Mol Cell. 2012 Apr 27;46(2):115-24. (PMID: 22541554)
      PLoS Genet. 2016 May 05;12(5):e1005994. (PMID: 27149665)
      Nat Commun. 2017 May 31;8:15656. (PMID: 28561034)
      Nucleic Acids Res. 2019 May 7;47(8):4068-4085. (PMID: 30799487)
      Front Genet. 2015 Apr 28;6:158. (PMID: 25972891)
      Elife. 2021 Jul 08;10:. (PMID: 34236317)
      Science. 2018 Jan 5;359(6371):108-114. (PMID: 29170278)
      Microbiol Spectr. 2014 Dec;2(6):. (PMID: 26104458)
      Cell Rep. 2018 May 29;23(9):2595-2605. (PMID: 29847791)
      J Mol Biol. 1983 Jun 15;167(1):57-75. (PMID: 6306255)
      Mol Cell Biol. 2019 Nov 25;39(24):. (PMID: 31591143)
      FEBS J. 2009 Mar;276(6):1494-505. (PMID: 19228196)
      Genome Biol. 2008;9(9):R137. (PMID: 18798982)
      Mol Biochem Parasitol. 2012 May;183(1):78-83. (PMID: 22353557)
      FEMS Microbiol Rev. 2012 Sep;36(5):917-48. (PMID: 22212019)
      Nature. 2009 May 14;459(7244):278-81. (PMID: 19369939)
      Nucleic Acids Res. 2013 Jan;41(2):943-60. (PMID: 23222131)
      Nat Immunol. 2003 May;4(5):442-51. (PMID: 12679812)
      Cell Res. 2014 Jul;24(7):870-85. (PMID: 24810301)
      J Biol Chem. 2002 Jul 19;277(29):26185-93. (PMID: 12011090)
      PLoS One. 2008;3(10):e3527. (PMID: 18953401)
      Microbiol Spectr. 2014 Dec;2(6):. (PMID: 26104448)
      Cell Microbiol. 2013 Dec;15(12):1984-93. (PMID: 24047558)
      J Biol Chem. 2020 Jan 10;295(2):301-313. (PMID: 31753921)
      Genes Dev. 2009 May 1;23(9):1063-76. (PMID: 19369410)
      Methods Mol Biol. 2022;2528:215-237. (PMID: 35704194)
      Trends Genet. 2019 Oct;35(10):743-753. (PMID: 31353047)
      Nucleic Acids Res. 2019 Sep 26;47(17):9180-9197. (PMID: 31350892)
      Mol Biol Cell. 2021 Jan 1;32(1):74-89. (PMID: 33147102)
      Nat Commun. 2017 May 12;8:15058. (PMID: 28497783)
      Nat Commun. 2018 Feb 7;9(1):532. (PMID: 29416038)
      PLoS Pathog. 2018 Nov 15;14(11):e1007321. (PMID: 30440029)
      Semin Cell Dev Biol. 2023 Feb 15;135:59-72. (PMID: 35331626)
      Elife. 2016 May 26;5:. (PMID: 27228154)
      J Biol Chem. 2020 Mar 20;295(12):3990-4000. (PMID: 32029477)
      Mol Cell. 2022 Jun 16;82(12):2267-2297. (PMID: 35508167)
      Gene. 2015 Feb 1;556(1):68-73. (PMID: 25261847)
      Nucleic Acids Res. 2008 May;36(8):2608-18. (PMID: 18334531)
      PLoS Genet. 2020 Jul 1;16(7):e1008828. (PMID: 32609721)
      Mol Biochem Parasitol. 2006 Apr;146(2):231-41. (PMID: 16464509)
      Nucleic Acids Res. 1995 Dec 25;23(24):5006-11. (PMID: 8559658)
      Mol Microbiol. 2014 May;92(4):756-76. (PMID: 24661334)
      Nat Cell Biol. 2021 Apr;23(4):305-313. (PMID: 33837288)
      mBio. 2021 Dec 21;12(6):e0135221. (PMID: 34749530)
      Nat Struct Mol Biol. 2014 Apr;21(4):366-74. (PMID: 24658350)
      Nucleic Acids Res. 2011 Mar;39(4):1372-80. (PMID: 20965968)
      Nucleic Acids Res. 2021 Feb 22;49(3):1436-1454. (PMID: 33450001)
      Genes Dev. 1999 Nov 1;13(21):2875-88. (PMID: 10557214)
      Nat Rev Microbiol. 2009 Jul;7(7):493-503. (PMID: 19503065)
      Elife. 2013 Jun 11;2:e00505. (PMID: 23795288)
      Nucleic Acids Res. 2017 Jun 2;45(10):5785-5796. (PMID: 28334836)
      Mol Biochem Parasitol. 2014 Jun;195(1):59-73. (PMID: 24992042)
      Nature. 2021 Jun;594(7862):283-288. (PMID: 33981036)
      Mol Microbiol. 2019 Oct;112(4):1219-1234. (PMID: 31338863)
      Nature. 2018 Nov;563(7729):121-125. (PMID: 30333624)
      Nature. 2020 Jan;577(7791):576-581. (PMID: 31875854)
      R Soc Open Sci. 2017 May 3;4(5):170095. (PMID: 28573017)
    • Grant Information:
      United Kingdom WT_ Wellcome Trust
    • Contributed Indexing:
      Keywords: DNA repair; RNA–DNA hybrid; antigenic variation; recombination; trypanosome
    • Accession Number:
      9007-49-2 (DNA)
      63231-63-0 (RNA)
      0 (Variant Surface Glycoproteins, Trypanosoma)
    • Publication Date:
      Date Created: 20231121 Date Completed: 20231127 Latest Revision: 20231205
    • Publication Date:
      20231215
    • Accession Number:
      PMC10691351
    • Accession Number:
      10.1073/pnas.2309306120
    • Accession Number:
      37988471