| Role | Gene | Name | |
|---|
| 1-pyrroline-4-hydroxy-2-carboxylate deaminase (EC 3.5.4.22) | OKGIIK_01645 | | |
| 4-hydroxyproline epimerase (EC 5.1.1.8) | OKGIIK_01625 | | |
| Aldehyde dehydrogenase (EC 1.2.1.3) in 4-hydroxyproline catabolic gene cluster | No genes | | |
| Amino acid permease in 4-hydroxyproline catabolic gene cluster | No genes | | |
| D-amino acid dehydrogenase (EC 1.4.99.1) family protein in hydroxy-L-proline catabolic cluster | No genes | | |
| D-amino-acid oxidase (EC 1.4.3.3) | OKGIIK_01630 | | |
| D-proline reductase, 23 kDa subunit (EC 1.21.4.1) | No genes | | |
| D-proline reductase, 26 kDa subunit (EC 1.21.4.1) | No genes | | |
| D-proline reductase, 45 kDa subunit (EC 1.21.4.1) | No genes | | |
| Delta 1-pyrroline-5-carboxylate dehydrogenase domain protein | No genes | | |
| Delta-1-pyrroline-5-carboxylate dehydrogenase (EC 1.5.1.12) | OKGIIK_07710 | adhE | |
| | OKGIIK_16505 | putA | |
| Dipeptidyl peptidase IV in 4-hydroxyproline catabolic gene cluster | No genes | | |
| Hypothetical, similar to sarcosine oxidase alpha subunit, 2Fe-2S domain | OKGIIK_01635 | | |
| Ketoglutarate semialdehyde dehydrogenase (EC 1.2.1.26) | OKGIIK_01650 | | |
| L-Proline/Glycine betaine transporter ProP | OKGIIK_04185 | | |
| | OKGIIK_07480 | araJ | |
| Microbial collagenase, secreted (EC 3.4.24.3) | No genes | | |
| Not a Proline racemase, nor 4-hydroxyproline epimerase [missing catalytic residues] | No genes | | |
| Predicted 4-hydroxyproline dipeptidase | OKGIIK_01655 | | |
| Predicted regulator PutR for proline utilization, GntR family | No genes | | |
| ProQ: influences osmotic activation of compatible solute ProP | No genes | | |
| Proline dehydrogenase (EC 1.5.99.8) (Proline oxidase) | OKGIIK_16505 | putA | |
| Proline iminopeptidase (EC 3.4.11.5) | OKGIIK_10045 | pip | |
| | OKGIIK_13165 | pip | |
| Proline racemase (EC 5.1.1.4) | No genes | | |
| Proline-specific permease proY | No genes | | |
| Proline/sodium symporter PutP (TC 2.A.21.2.1) | No genes | | |
| PutR, transcriptional activator of PutA and PutP | No genes | | |
| Putative beta-galactosidase in 4-hydroxyproline catabolic gene cluster | No genes | | |
| Putative oxidoreductase in 4-hydroxyproline catabolic gene cluster | OKGIIK_01640 | | |
| Similar to eukaryotic Peptidyl prolyl 4-hydroxylase, alpha subunit (EC 1.14.11.2) | OKGIIK_16985 | | |
| Transcriptional repressor of PutA and PutP | No genes | | |
| Ureidoglycolate/malate/sulfolactate dehydrogenase family (EC 1.1.1.-) | No genes | | |
| putPA fragment of control region | No genes | | |