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. 2018 Aug 16;46(17):8993–9010. doi: 10.1093/nar/gky733

Figure 1.

Figure 1.

Trypanosoma brucei 4EIP interacts with EIF4E1. (A) Conserved regions in kinetoplastid 4EIPs. Amino acids highlighted in black are identical in all aligned sequences. Residues highlighted in gray are partially conserved—either identical or chemically similar in a majority of sequences. Sequences are (in vertical order): Trypanosoma grayi DQ04_01981000; Trypanosoma theileri ORC92063.1; Trypanosoma cruzi TcCLB.508461.290; Trypanosoma congolense TcIL3000_9_4530 Tryanosoma brucei Tb927.9.11050; Trypanosoma vivax TvY486_0905070; Endotrypanum_monterogeii EMOLV88_350043200; Leishmania major LmjF.35.3980; Blechomonas_ayalai Baya_047_0070; Bodo caudatus CUG36708.1. (B) The photos show growth of yeast on plates with stringent selection for the interaction between bait and prey plasmids. The identities of the plasmids used are shown next to the streaked yeast. Full results with controls are shown in Supplementary Figure S1A. (C) Extracts were made from bloodstream-form trypanosomes with or without a V5- in situ tagged eIF4E1 and myc-tagged 4EIP. Anti-myc immunoprecipitates were subjected to sodium dodecylsulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and western blotting. In: input extract from 5 × 106 cells; U: unbound fraction from 5 × 106 cells; E: eluate from immunoprecipitating beads, from 1 × 108 cells. Upper panel: anti-myc pull-down, with cells lacking a myc-tagged protein as control. Lower panel: anti-V5 pull-down, with cells lacking V5-tagged protein as the control. (D) As in (C) but with anti-V5 as the precipitating antibody. (E) As in (C) but with procyclic-form trypanosomes. (F) Western blot showing relative amounts of V5-tagged 4EIP and EIF4E1 in bloodstream forms. The only band from 4EIP migrated at ∼37 kDa. The control is ribosomal protein S9.