(A) Crossovers in the library designed using the SCHEMA energy function capture domain boundaries of CYP102A1 determined from molecular dynamics simulations [
27]. Crossovers between blocks 2–3, 4–5, 5–6, and 7–8 lie within α-helices. (Secondary structure assignment is based on the CYP102A1 crystal structure [
24]).
(B) Plot of the RMSD between the backbone atoms of the substrate-bound (closed) and unbound (open) structures of CYP102A1. The RMSD was calculated by comparing molecule B of the substrate-free structure [
29] and molecule A of the structure bound to palmitoleic acid [
26] using Swiss PDB Viewer. Vertical lines designate crossover locations and blocks are numbered. Crossovers between blocks 1–2, 5–6, 6–7, and 7–8 occur at positions that move < 1.2 Å between the two structures. Crossover 3–4 is located next to a region of high identity and may be shifted towards the N-terminus by up to 14 residues and still produce the same chimeras. This shift allows it to occur at a position which moves < 1.2 Å.