Figure 1
Multiple amino-acid sequence alignment of GPDH with the closest structural homologues: zinc-binding dehydrogenase from S. meliloti (PDB entry 4ejm
), threonine dehydrogenase from P. horikoshii (PDB entry 2dfv
), sorbitol dehydrogenase from silverleaf whitefly (PDB entry 1e3j
), threonine 3-dehydrogenase from T. thermophilus (PDB entry 2dq4
), L-threonine dehydrogenase from T. kodakaraensis (PDB entry 3gfb
) and human sorbitol dehydrogenase (PDB entry 1pl8
). Secondary-structural elements of GPDH according to DSSP are indicated as orange arrows (β-strands) and green cylinders (α-helices). In the upper part an overall view of GPDH (represented as ribbon model) is shown indicating the locations of the catalytic and the structural zincs (green spheres) and the relative orientation of the GPDH subdomains. |