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. 2022 Feb 1;36(3-4):225–240. doi: 10.1101/gad.348993.121

Figure 7.

Figure 7.

Distinct strategies for BEN domains to recognize DNA (A) AlphaFold2 predicts that several mammalian BEN domains (type I) have overall similar structures, including a substantial loop between α helices 3 and 4 and a long α helix 5. (B,B′) Both of these features are shared with DNA-binding contact regions in the Insv-BEN tertiary structure (PDB: 4IX7, in red), indicating that these BEN domains (type I) likely use similar strategies to interact with DNA. (C) The BEND3-BD4 domain contains a short loop in the C terminus that produces an α helix 6 (α6) and provides a channel to load DNA. RoseTTAFold predicts that several other BEN domains (type II) share this short “helix (α5)–loop–helix (α6)” structure, implying a shared strategy for DNA recognition. (D) Superposition of BEND3-BD4 and other predicted type II BEN domains predicted by RoseTTAFold.