Functional analysis of Rossmann-like domains reveals convergent evolution of topology and reaction pathways
Fig 12
ECOD homology groups reveal different methotrexate binding modes in RLM enzymes.
Domains with RLM SSEs (colored in rainbow, with crossover loop in yellow and catalytic loop in magenta) bind methotrexate (shown in thick sticks; pteridine ring Cα atoms are colored by magenta, rest by yellow) differently. (A) DHFR (PDB: 1U72, EC: 1.5.1.3, ECOD H-gr: 2111.5) binds methotrexate and NADH (green sticks, colored by element). (B) Pteridine reductase (PDB: 1E7W, EC: 1.5.1.33, ECOD: 2003.1) binds methotrexate and NADH (sticks, colored by element). (C) Gamma-glutamyl hydrolase (PDB: 4L8W, EC: 3.4.19.9, ECOD: 2007.1) binds methotrexate and glutamic acid (sticks, colored by element).