Taurinivorans muris gen. nov. sp. nov.

Taurinivorans gen. nov. (Tau.ri.ni.vo'rans. N.L. n. taurinum, taurine; L. part. adj. vorans, eating; N.L. masc. n. Taurinivorans, a taurine eater). Comparative genome analyses suggest the common electron acceptor is taurine, which is degraded and reduced to sulfide via the Tpa-Xsc-DsrAB-DsrC pathway. Type species: Taurinivorans muris sp. nov., family: Desulfovibrionaceae VP, order: Desulfovibrionales VP (T) emend., class: Desulfovibrionia class. nov., phylum: Desulfobacterota phyl. nov.

Taurinivorans muris sp. nov. (mu'ris. L. gen. n. muris, of a mouse, referring to its origin from the mouse intestine). The type strain is strain LT0009 (= DSM 111569 = JCM 34262), isolated from the mouse gut with taurine as the electron acceptor and lactate/pyruvate as electron donors. Formate was also used as an electron donor for taurine respiration.Cells are Gram-stain-negative, spirilloid in shape, and motile by means of lophotrichous polar flagella. The temperature range is 27-42°C and the optimum pH is 6.5 (range 6-8.5) for strictly anaerobic growth. The optimal taurine concentration for growth is 40 mmol/l, higher taurine concentrations inhibit growth. Sulfolactate and thiosulfate are additional electron acceptors for anaerobic respiration and are also reduced to hydrogen sulfide. Yeast extract and 1,4-naphthoquinone are required as growth supplements for laboratory cultivation of the isolate. Its genome size is 2.2 Mbp with a G+C content of 43.6%. The GenBank accession numbers for the genome and the 16S rRNA gene sequence of strain LT0009T are CP065938 and MW258658, respectively.