Abstract:
:Follicular lymphoma (FL) and the GCB subtype of diffuse large B-cell lymphoma (DLBCL) derive from germinal center B cells. Targeted resequencing studies have revealed mutations in various genes encoding proteins in the NF-kappaB pathway that contribute to the activated B-cell (ABC) DLBCL subtype, but thus far few GCB-specific mutations have been identified. Here we report recurrent somatic mutations affecting the polycomb-group oncogene EZH2, which encodes a histone methyltransferase responsible for trimethylating Lys27 of histone H3 (H3K27). After the recent discovery of mutations in KDM6A (UTX), which encodes the histone H3K27me3 demethylase UTX, in several cancer types, EZH2 is the second histone methyltransferase gene found to be mutated in cancer. These mutations, which result in the replacement of a single tyrosine in the SET domain of the EZH2 protein (Tyr641), occur in 21.7% of GCB DLBCLs and 7.2% of FLs and are absent from ABC DLBCLs. Our data are consistent with the notion that EZH2 proteins with mutant Tyr641 have reduced enzymatic activity in vitro.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Morin RD,Johnson NA,Severson TM,Mungall AJ,An J,Goya R,Paul JE,Boyle M,Woolcock BW,Kuchenbauer F,Yap D,Humphries RK,Griffith OL,Shah S,Zhu H,Kimbara M,Shashkin P,Charlot JF,Tcherpakov M,Corbett R,Tam A,Varhol Rdoi
10.1038/ng.518subject
Has Abstractpub_date
2010-02-01 00:00:00pages
181-5issue
2eissn
1061-4036issn
1546-1718pii
ng.518journal_volume
42pub_type
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