Updated annotation (from data): glycoside 3-dehydrogenase (EC 1.1.99.13) Rationale: This is a glycoside 3-dehydrogenase (PMID:38898276). It was difficult to map insertions in this gene because of a paralog, but reexamination of the data suggests that this gene has a similar fitness pattern as the surrounding genes and is important for growth on trehalose, leucrose, palatinose, and raffinose. And a clean deletion mutant failed to grow on trehalose. It has a TAT (twin arginine transport) signal and is probably exported together with its NAD(P) cofactor, as with the glucose:fructose oxidoreductase Gfo. It's unclear what the electron acceptor could be, given that this enzyme is in the periplasm and B.theta has a very limited electron transport chain. After cleavage by BT2157 (or BT2156, see PMID:38898276) and hydration by BT2157, the resulting 3-ketoglucose is reduced by BT2159, which appears to be cytoplasmic. Original annotation: putative dehydrogenases and related proteins (NCBI ptt file) Type 1: Protein-coding gene Located on scaffold 241, - strand, nucleotides 2,716,447 to 2,717,922 See nucleotide sequence around BT2158 or for all of scaffold 241