| Role | Gene | Name | |
|---|
| 1-pyrroline-4-hydroxy-2-carboxylate deaminase (EC 3.5.4.22) | Xcc-8004.2129.1 | | |
| 4-hydroxyproline epimerase (EC 5.1.1.8) | Xcc-8004.2125.1 | | |
| 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) | Xcc-8004.2126.1 | | |
| 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) | No genes | | |
| Dipeptidyl peptidase IV in 4-hydroxyproline catabolic gene cluster | Xcc-8004.2136.1 | | |
| Hypothetical, similar to sarcosine oxidase alpha subunit, 2Fe-2S domain | Xcc-8004.2127.1 | | |
| Ketoglutarate semialdehyde dehydrogenase (EC 1.2.1.26) | Xcc-8004.2130.1 | | |
| L-Proline/Glycine betaine transporter ProP | Xcc-8004.109.1 | | |
| | Xcc-8004.3036.1 | | |
| 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 | Xcc-8004.2131.1 | | |
| Predicted regulator PutR for proline utilization, GntR family | Xcc-8004.744.1 | | |
| ProQ: influences osmotic activation of compatible solute ProP | No genes | | |
| Proline dehydrogenase (EC 1.5.99.8) (Proline oxidase) | Xcc-8004.4848.1 | | |
| Proline iminopeptidase (EC 3.4.11.5) | Xcc-8004.1646.1 | | |
| | Xcc-8004.4219.1 | | |
| 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 | Xcc-8004.2137.1 | | |
| Putative oxidoreductase in 4-hydroxyproline catabolic gene cluster | Xcc-8004.2128.1 | | |
| Similar to eukaryotic Peptidyl prolyl 4-hydroxylase, alpha subunit (EC 1.14.11.2) | Xcc-8004.3644.1 | | |
| | Xcc-8004.937.1 | | |
| 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 | | |