FIG 5.

Structural features of AltL. (A) Ribbon diagram of the final stable structure of AltL from homology modeling and molecular dynamics simulation. The approximate position of the outer membrane (OM) is indicated by two horizontal lines. E and P represent extracellular and periplasmic sides, respectively. (B) Comparison of the AltL homology model with the structures of FadL family members FadL_Ec and TodX, shown in ribbon representations. Extracellular loops are colored cyan (L3), green (L4), yellow (L5), and magenta (L7). The S3 strand is colored blue. Bound substrate molecules are colored red. (C) Molecular docking between substrate C₂₈ and AltL. Substrate molecules are colored cyan. (D) Molecular docking between substrate C₁₆ and AltL. Substrate molecules are colored cyan.