Different bacterial strategies to degrade taurocholate.
Aerobic enrichment cultures with taurocholate or alkanesulfonates as sole sources of carbon and energy for growth were successful and yielded nine bacterial isolates, all of which utilized taurocholate. Growth was complex and involved not only many, usually transient, excretion products but also sorption of taurocholate and cholate to cells. Three metabolic strategies to dissimilate taurocholate were elucidated, all of which involved bile salt hydrolase cleaving taurocholate to cholate and taurine. Comamonas testosteroni KF-1 utilized both the taurine and the cholate moieties for growth. Pseudomonas spp., e.g. strain TAC-K3 and Rhodococcus equi TAC-A1 grew with the cholate moiety and released taurine quantitatively. Delftia acidovorans SPH-1 utilized the taurine moiety and released cholate.
Rösch
Verena
V
Department of Biology, The University, 78457, Konstanz, Germany.
Denger
Karin
K
Schleheck
David
D
Smits
Theo H M
TH
Cook
Alasdair M
AM
D000581:Amidohydrolases / Q000378:metabolism; D001419:Bacteria / Q000201:enzymology* / Q000235:genetics / Q000254:growth & development / Q000302:isolation & purification; D001673:Biodegradation, Environmental; D002244:Carbon / Q000378:metabolism; D020355:Cholates / Q000378:metabolism*; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D020459:Genes, rRNA; D005838:Genotype; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013656:Taurocholic Acid / Q000378:metabolism*
D020355:Cholates; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D013656:Taurocholic Acid; D002244:Carbon; D000581:Amidohydrolases; C023154:choloylglycine hydrolase