New structural insights into bacterial sulfoacetaldehyde and taurine metabolism.

In last year's issue 4 of Biochemical Journal, Zhou et al. (Biochem J. 476, 733-746) kinetically and structurally characterized the reductase IsfD from Klebsiella oxytoca that catalyzes the reversible reduction in sulfoacetaldehyde to the corresponding alcohol isethionate. This is a key step in detoxification of the carbonyl intermediate formed in bacterial nitrogen assimilation from the α-aminoalkanesulfonic acid taurine. In 2019, the work on sulfoacetaldehyde reductase IsfD was the exciting start to a quite remarkable series of articles dealing with structural elucidation of proteins involved in taurine metabolism as well as the discovery of novel degradation pathways in bacteria.