| Role | Gene | Name | |
|---|
| ABC transporter, predicted N-acetylneuraminate transport system permease protein 1 | No genes | | |
| ABC transporter, predicted N-acetylneuraminate transport system permease protein 2 | No genes | | |
| ABC transporter, predicted N-acetylneuraminate-binding protein | No genes | | |
| Beta-1,4-N-acetylgalactosaminyltransferase (EC 2.4.1.-) | No genes | | |
| CMP-N-acetylneuraminate-beta-galactosamide-alpha-2,3-sialyltransferase (EC 2.4.99.-) | No genes | | |
| Glucosamine--fructose-6-phosphate aminotransferase [isomerizing] (EC 2.6.1.16) | Atu1786 | | |
| Glucosamine-1-phosphate N-acetyltransferase (EC 2.3.1.157) | Atu1787 | | |
| Glucosamine-6-phosphate deaminase (EC 3.5.99.6) | No genes | | |
| N-Acetylneuraminate cytidylyltransferase (EC 2.7.7.43) | No genes | | |
| N-acetylglucosamine-1-phosphate uridyltransferase (EC 2.7.7.23) | Atu1787 | | |
| N-acetylglucosamine-6-phosphate deacetylase (EC 3.5.1.25) | Atu2608 | | |
| N-acetylmannosamine kinase (EC 2.7.1.60) | Atu2609 | | |
| N-acetylmannosamine-6-phosphate 2-epimerase (EC 5.1.3.9) | No genes | | |
| N-acetylneuraminate lyase (EC 4.1.3.3) | No genes | | |
| N-acetylneuraminate mutarotase | No genes | | |
| N-acetylneuraminate synthase (EC 2.5.1.56) | No genes | | |
| N-acetylneuraminic acid outer membrane channel protein NanC | No genes | | |
| N-acylglucosamine 2-epimerase (EC 5.1.3.8) | Atu2156 | | |
| PTS system, N-acetylglucosamine-specific IIA component (EC 2.7.1.69) | No genes | | |
| PTS system, N-acetylglucosamine-specific IIB component (EC 2.7.1.69) | No genes | | |
| PTS system, N-acetylglucosamine-specific IIC component (EC 2.7.1.69) | No genes | | |
| PTS system, N-acetylmuramic acid-specific IIB component (EC 2.7.1.69) | No genes | | |
| PTS system, N-acetylmuramic acid-specific IIC component (EC 2.7.1.69) | No genes | | |
| PTS system, mannose-specific IIA component (EC 2.7.1.69) | No genes | | |
| PTS system, mannose-specific IIB component (EC 2.7.1.69) | No genes | | |
| PTS system, mannose-specific IIC component (EC 2.7.1.69) | No genes | | |
| PTS system, mannose-specific IID component (EC 2.7.1.69) | No genes | | |
| Phosphoglucosamine mutase (EC 5.4.2.10) | Atu3709 | | |
| Predicted sialic acid transporter | No genes | | |
| Putative sugar isomerase involved in processing of exogenous sialic acid | No genes | | |
| Sialic acid biosynthesis protein NeuD, O-acetyltransferase | No genes | | |
| Sialic acid transporter (permease) NanT | No genes | | |
| Sialic acid utilization regulator, RpiR family | No genes | | |
| Sialic acid-induced transmembrane protein YjhT(NanM), possible mutarotase | No genes | | |
| Sialidase (EC 3.2.1.18) | No genes | | |
| TRAP-type transport system, large permease component, predicted N-acetylneuraminate transporter | Atu3135 | | |
| | Atu3156 | | |
| | Atu3255 | | |
| TRAP-type transport system, periplasmic component, predicted N-acetylneuraminate-binding protein | Atu3253 | | |
| TRAP-type transport system, small permease component, predicted N-acetylneuraminate transporter | No genes | | |
| Transcriptional regulator NanR | Atu2740 | | |
| | Atu3252 | | |
| UDP-N-acetylglucosamine 2-epimerase (EC 5.1.3.14) | No genes | | |