Percentage of cases carrying mutations in the
BCL6-, BCL2-, and CXCR4-
SE hotspots characterized in Figures
4–6 across an
independent panel of GC-derived lymphomas (DLBCL, FL, BL, and
IGHV-mutated-CLL), non-GC derived lymphomas (IGHV-unmutated-CLL), and other
cancer types from the ICGC pan-cancer project. In further support of the
selective pressure for mutating these sequences, 15bp domains located
between 0.5kb and 3kb from the BS, within the same SE (BS-distal) were
randomly selected with 100 permutations, and the percentage of mutated cases
in these regions was calculated (grey bars; mean of 100 permutations).
Particularly relevant is the lack of hotspot mutations in M-CLL (which have
transited through the GC and therefore represent specific surrogates of
normal GC alleles).