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. 2013 Oct 1;27(19):2125–2138. doi: 10.1101/gad.226951.113

Figure 5.

Figure 5.

SMG7 interacts directly with POP2. (A,B) Interaction of SMG7-V5-SBP-MBP with GFP-POP2 (A) or endogenous POP2/CAF1 (B) in the absence or presence of RNase A. A V5-SBP-MBP served as a negative control. (C) The domain architectures of POP2 and CAF1. POP2 and CAF1 contain a central catalytic domain of the DEDD family exhibiting 84% identity. The C-terminal extensions are more divergent in sequence and length. (DG) GST-tagged CAF1 or POP2 (wild type or mutants) or GST was used to pull down [35S]-methionine-labeled in vitro translated SMG7 PC and ΔPC fragments. (D,F) Inputs (1%) and bound fractions (16%) were analyzed by 10% SDS-PAGE followed by fluorography. The corresponding Coomassie-stained gels are shown in E and G. (H) GST, GST-POP2, and MBP-SMG7 were expressed in E. coli and purified. The purified proteins were mixed in a 1:1 ratio (inputs), pulled down using glutathione agarose beads, and analyzed by SDS-PAGE followed by Coomassie staining.