APOBEC3B regulates R-loops and promotes transcription-associated mutagenesis in cancer.
APOBEC3B regulates R-loops and promotes transcription-associated mutagenesis in cancer.
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DOI:
10.1038/s41588-023-01504-w
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发表时间:
2023-10
期刊:
影响因子:
30.8
通讯作者:
Harris, Reuben S.
中科院分区:
文献类型:
--
作者:
McCann, Jennifer L.;Cristini, Agnese;Law, Emily K.;Lee, Seo Yun;Tellier, Michael;Carpenter, Michael A.;Beghe, Chiara;Kim, Jae Jin;Sanchez, Anthony;Jarvis, Matthew C.;Stefanovska, Bojana;Temiz, Nuri A.;Bergstrom, Erik N.;Salamango, Daniel J.;Brown, Margaret R.;Murphy, Shona;Alexandrov, Ludmil B.;Miller, Kyle M.;Gromak, Natalia;Harris, Reuben S.
The single-stranded DNA cytosine-to-uracil deaminase APOBEC3B is an antiviral protein implicated in cancer. However, its substrates in cells are not fully delineated. Here APOBEC3B proteomics reveal interactions with a surprising number of R-loop factors. Biochemical experiments show APOBEC3B binding to R-loops in cells and in vitro. Genetic experiments demonstrate R-loop increases in cells lacking APOBEC3B and decreases in cells overexpressing APOBEC3B. Genome-wide analyses show major changes in the overall landscape of physiological and stimulus-induced R-loops with thousands of differentially altered regions, as well as binding of APOBEC3B to many of these sites. APOBEC3 mutagenesis impacts genes overexpressed in tumors and splice factor mutant tumors preferentially, and APOBEC3-attributed kataegis are enriched in RTCW motifs consistent with APOBEC3B deamination. Taken together with the fact that APOBEC3B binds single-stranded DNA and RNA and preferentially deaminates DNA, these results support a mechanism in which APOBEC3B regulates R-loops and contributes to R-loop mutagenesis in cancer. APOBEC3B interacts with R-loops and helps mediate their resolution in a deamination-dependent way. This association also renders R-loops susceptible to enhanced APOBEC3B-dependent mutagenesis.
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影响因子:
64.8
作者:
Bergstrom EN;Luebeck J;Petljak M;Khandekar A;Barnes M;Zhang T;Steele CD;Pillay N;Landi MT;Bafna V;Mischel PS;Harris RS;Alexandrov LB
通讯作者:
Alexandrov LB
影响因子:
21.8
作者:
通讯作者:
--
影响因子:
3
作者:
Bergstrom EN;Barnes M;Martincorena I;Alexandrov LB
通讯作者:
Alexandrov LB
DOI:
10.1038/nri.2016.2
发表时间:
2016-03
期刊:
Nature reviews. Immunology
影响因子:
--
作者:
Casellas R;Basu U;Yewdell WT;Chaudhuri J;Robbiani DF;Di Noia JM
通讯作者:
Di Noia JM
DOI:
10.1083/jcb.202101092
发表时间:
2021-09-06
期刊:
The Journal of cell biology
影响因子:
--
作者:
Crossley MP;Brickner JR;Song C;Zar SMT;Maw SS;Chédin F;Tsai MS;Cimprich KA
通讯作者:
Cimprich KA