or RING1 cDNAs were purchased from the Harvard Plasmid
Repository. DNMT3A or DNMT3B cDNAs were cloned into pLX-TRC313 (Broad Institute)
using Gateway LR Clonase II Enzyme mix (Thermo Fisher Scientific). Control
vector pLX-TRC313-GFP was obtained from Broad Institute. GM12878 LCLs were
transduced with pLX-TRC313-GFP, -DNMT3A, or -DNMT3B encoding lentiviruses. Cells
were selected with hygromycin for 2 weeks. Heterogenous protein expression was
confirmed by immunoblot using anti-V5 tag antibody (V8012, Sigma-Aldrich).
RING1 cDNA was cloned into pHAGE-3×FLAG-MYC vector
using Gateway LR Clonase II Enzyme mix (Thermo Fisher Scientific). Control
vector pHAGE-GFP was obtained from Addgene (plasmid #106281). GM12878 LCLs were
transduced with either pHAGE-GFP or RING1 encoding lentiviruses. Cells were
selected with puromycin for 4 days. Heterogenous protein expression was
confirmed by immunoblot using anti-Flag tag antibody (F1804, Sigma-Aldrich).