ジャーナル: Nat Commun / 年: 2021 タイトル: Structure of PDE3A-SLFN12 complex reveals requirements for activation of SLFN12 RNase. 著者: Colin W Garvie / Xiaoyun Wu / Malvina Papanastasiou / Sooncheol Lee / James Fuller / Gavin R Schnitzler / Steven W Horner / Andrew Baker / Terry Zhang / James P Mullahoo / Lindsay Westlake / ...著者: Colin W Garvie / Xiaoyun Wu / Malvina Papanastasiou / Sooncheol Lee / James Fuller / Gavin R Schnitzler / Steven W Horner / Andrew Baker / Terry Zhang / James P Mullahoo / Lindsay Westlake / Stephanie H Hoyt / Marcus Toetzl / Matthew J Ranaghan / Luc de Waal / Joseph McGaunn / Bethany Kaplan / Federica Piccioni / Xiaoping Yang / Martin Lange / Adrian Tersteegen / Donald Raymond / Timothy A Lewis / Steven A Carr / Andrew D Cherniack / Christopher T Lemke / Matthew Meyerson / Heidi Greulich / 要旨: DNMDP and related compounds, or velcrins, induce complex formation between the phosphodiesterase PDE3A and the SLFN12 protein, leading to a cytotoxic response in cancer cells that express elevated ...DNMDP and related compounds, or velcrins, induce complex formation between the phosphodiesterase PDE3A and the SLFN12 protein, leading to a cytotoxic response in cancer cells that express elevated levels of both proteins. The mechanisms by which velcrins induce complex formation, and how the PDE3A-SLFN12 complex causes cancer cell death, are not fully understood. Here, we show that PDE3A and SLFN12 form a heterotetramer stabilized by binding of DNMDP. Interactions between the C-terminal alpha helix of SLFN12 and residues near the active site of PDE3A are required for complex formation, and are further stabilized by interactions between SLFN12 and DNMDP. Moreover, we demonstrate that SLFN12 is an RNase, that PDE3A binding increases SLFN12 RNase activity, and that SLFN12 RNase activity is required for DNMDP response. This new mechanistic understanding will facilitate development of velcrin compounds into new cancer therapies.
Primary map, sharpened by an automatically-determined B-factor (-98.5043) and filtered to local resolution, using the Relion local resolution implementation.
Chain - Source name: PDB / Chain - Initial model type: experimental model
詳細
The model was generated by rigid body fitting of the SLFN12 and PDE3A bodies (from multi-body refinement and deposited separately) into this map using UCSF Chimera and Coot, followed by local refinement in Coot of the linkers between the bodies to ameliorate backbone geometry.
精密化
空間: REAL
得られたモデル
PDB-7lrd: Cryo-EM of the SLFN12-PDE3A complex: Consensus subset model