Table 3.
Oligomeric States and Quaternary Structures of Proline Utilization A
| PutA class | PDB code | Rg (Å) | Oligomeric state | Quaternary structure | |
|---|---|---|---|---|---|
| BjPutA | 1A | 3HAZ | 52 | Tetramer | Ring-shaped dimer of domain-swapped dimers |
| LpPutA | 1A | — | 47 | Dimer | Classic ALDH domain swapping |
| SmPutA | 1B | 5KF6-7 | 33/40 | Monomer/dimer | C-terminal ALDSF domain packs against the α- and GSALDH catalytic domains |
| EcPutA | 1C | — | 63 | Dimer | β-sheet from RHH domains |
| GsPutA | 2A | 4NMA-E, 4NM9 | 44 | Dimer | Classic ALDH domain swapping |
| BbPutA | 2A | 5UR2 | 46 | Dimer | Classic ALDH domain swapping |
| DvPutA | 2A | — | 46 | Dimer | Classic ALDH domain swapping |
| CfPutA | 3B | 5UX5 | 32/– | Monomer/dimer | Unknown |
ALDH, aldehyde dehydrogenase; ALDSF, aldehyde dehydrogenase superfamily; BbPutA, Bdellovibrio bacteriovorus proline utilization A; BjPutA, Bradyrhizobium japonicum proline utilization A; CfPutA, Corynebacterium freiburgense proline utilization A; DvPutA, Desulfovibrio vulgaris proline utilization A; EcPutA, Escherichia coli proline utilization A; GSALDH, l-glutamate γ-semialdehyde dehydrogenase; GsPutA, Geobacter sulfurreducens proline utilization A; LpPutA, Legionella pneumophila proline utilization A; PDB, Protein Data Bank; PutA, proline utilization A; RHH, ribbon-helix-helix; SmPutA, Sinorhizobium meliloti proline utilization A.