| Role | Gene | Name | |
|---|
| Alcohol dehydrogenase GbsB (type III ), essential for the utilization of choline (EC 1.1.1.1) | No genes | | |
| Betaine aldehyde dehydrogenase (EC 1.2.1.8) | No genes | | |
| Choline ABC transport system, ATP-binding protein OpuBA | No genes | | |
| Choline ABC transport system, choline-binding protein OpuBC | No genes | | |
| Choline ABC transport system, permease protein OpuBB | No genes | | |
| Choline ABC transport system, permease protein OpuBD | No genes | | |
| Choline binding protein A | No genes | | |
| Choline binding protein D | No genes | | |
| Choline dehydrogenase (EC 1.1.99.1) | No genes | | |
| Choline-sulfatase (EC 3.1.6.6) | M666_RS00035 | | |
| | M666_RS00040 | | |
| | M666_RS00095 | | |
| | M666_RS06420 | | |
| | M666_RS09630 | | |
| | M666_RS09650 | | |
| | M666_RS09670 | | |
| | M666_RS09680 | | |
| | M666_RS09745 | | |
| | M666_RS09765 | | |
| | M666_RS09780 | | |
| | M666_RS09790 | | |
| | M666_RS18145 | | |
| | M666_RS19500 | | |
| | M666_RS19535 | | |
| | M666_RS19540 | | |
| GbcA Glycine betaine demethylase subunit A | No genes | | |
| GbcB Glycine betaine demethylase subunit B | No genes | | |
| Glycine betaine ABC transport system permease protein | No genes | | |
| Glycine betaine ABC transport system, ATP-binding protein OpuAA (EC 3.6.3.32) | No genes | | |
| Glycine betaine ABC transport system, glycine betaine-binding protein OpuAC | No genes | | |
| Glycine betaine ABC transport system, permease protein OpuAB | No genes | | |
| Glycine betaine ABC transport system, permease/glycine betaine-binding protein OpuABC | No genes | | |
| Glycine betaine transporter OpuD | M666_RS00850 | | |
| Glycine betaine/L-proline ABC transporter, glycine betaine/L-proline- binding/permease protein | No genes | | |
| HTH-type transcriptional regulator BetI | No genes | | |
| High-affinity choline uptake protein BetT | No genes | | |
| L-proline glycine betaine ABC transport system permease protein ProV (TC 3.A.1.12.1) | No genes | | |
| L-proline glycine betaine ABC transport system permease protein ProW (TC 3.A.1.12.1) | No genes | | |
| L-proline glycine betaine binding ABC transporter protein ProX (TC 3.A.1.12.1) | No genes | | |
| Osmotically activated L-carnitine/choline ABC transporter, ATP-binding protein OpuCA | No genes | | |
| Osmotically activated L-carnitine/choline ABC transporter, permease protein OpuCB | No genes | | |
| Osmotically activated L-carnitine/choline ABC transporter, permease protein OpuCD | No genes | | |
| Osmotically activated L-carnitine/choline ABC transporter, substrate-binding protein OpuCC | No genes | | |
| Sarcosine oxidase alpha subunit (EC 1.5.3.1) | No genes | | |
| Sarcosine oxidase beta subunit (EC 1.5.3.1) | No genes | | |
| Sarcosine oxidase delta subunit (EC 1.5.3.1) | No genes | | |
| Sarcosine oxidase gamma subunit (EC 1.5.3.1) | No genes | | |