2,7-anhydro-N-acetylneuraminate hydratase

UniProtKB accession:  A7B558

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UniProtKB description:  Hydratase involved in the degradation of sialic acids, which are present in the host mucus layer and represent a much-coveted source of nutrients for R.gnavus, a prevalent member of the normal gut microbiota (PubMed:31636419, PubMed:32669363). Catalyzes the reversible conversion of the dehydrated form of N-acetylneuraminate (Neu5Ac), 2,7-anhydro-N-acetylneuraminate (2,7-AN), to Neu5Ac, allowing growth on 2,7-AN produced by the IT-sialidase NanH (PubMed:31636419, PubMed:32669363). Acts through a multistep mechanism involving a keto intermediate and cycling of NADH/NAD(+) (PubMed:32669363).