Abstract:
:GFI1 is a transcriptional regulator expressed in lymphoid cells, and an "oncorequisite" factor required for development and maintenance of T-lymphoid leukemia. GFI1 deletion causes hypersensitivity to ionizing radiation, for which the molecular mechanism remains unknown. Here, we demonstrate that GFI1 is required in T cells for the regulation of key DNA damage signaling and repair proteins. Specifically, GFI1 interacts with the arginine methyltransferase PRMT1 and its substrates MRE11 and 53BP1. We demonstrate that GFI1 enables PRMT1 to bind and methylate MRE11 and 53BP1, which is necessary for their function in the DNA damage response. Thus, our results provide evidence that GFI1 can adopt non-transcriptional roles, mediating the post-translational modification of proteins involved in DNA repair. These findings have direct implications for treatment responses in tumors overexpressing GFI1 and suggest that GFI1's activity may be a therapeutic target in these malignancies.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Vadnais C,Chen R,Fraszczak J,Yu Z,Boulais J,Pinder J,Frank D,Khandanpour C,Hébert J,Dellaire G,Côté JF,Richard S,Orthwein A,Drobetsky E,Möröy Tdoi
10.1038/s41467-018-03817-5subject
Has Abstractpub_date
2018-04-12 00:00:00pages
1418issue
1issn
2041-1723pii
10.1038/s41467-018-03817-5journal_volume
9pub_type
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