Figure 3: 3D structure and topology of LarA.
From: Lactate racemase is a nickel-dependent enzyme activated by a widespread maturation system
(a) 3D dimeric structure of LarATt (RSCB Protein Data Bank (PDB) accession code 2YJG). α-Helices are in red, β-sheets in yellow, and loops in green. Conserved residues are shown in stick representation and ethylene glycol, sulphate and Mg(II) are in sphere representation with C in white, N in blue, O in red, Mg in cyan and S in yellow. Surface representation is shown at the background. (b) The Lar fold. α-Helices are in red, β-strands in yellow and loops are in black. The topology of the β-sheet of domain A is six parallel β-strands in the order 162345. The topology of the β-sheet of domain B is six β-strands in the order 321456 with the last β-strand antiparallel to the rest. The numbers indicate the position of the two hinges.
