FN Archimer Export Format PT J TI Genetic Manipulations of the Hyperthermophilic Piezophilic Archaeon Thermococcus barophilus BT AF THIEL, Axel MICHOUD, Gregoire MOALIC, Yann FLAMENT, Didier JEBBAR, Mohamed AS 1:1,2,3;2:1,2,3;3:1,2,3;4:1,2,3;5:1,2,3; FF 1:PDG-REM-EEP-LMEE;2:;3:PDG-REM-EEP-LEP;4:PDG-REM-EEP-LMEE;5:; C1 Univ Bretagne Occidentale, UMR 6197, Lab Microbiol Environm Extremes, Inst Univ Europeen Mer, Plouzane, France. CNRS, UMR 6197, Lab Microbiol Environm Extremes, Inst Univ Europeen Mer, Plouzane, France. IFREMER, UMR 6197, Lab Microbiol Environm Extremes, Plouzane, France. C2 UBO, FRANCE CNRS, FRANCE IFREMER, FRANCE SI BREST SE PDG-REM-EEP-LMEE PDG-REM-EEP-LEP IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 3.668 TC 22 UR https://archimer.ifremer.fr/doc/00187/29818/28263.pdf LA English DT Article AB In this study, we developed a gene disruption system for Thermococcus barophilus using simvastatin for positive selection and 5-fluoroorotic acid (5-FOA) for negative selection or counterselection to obtain markerless deletion mutants using single-and double-crossover events. Disruption plasmids carrying flanking regions of each targeted gene were constructed and introduced by transformation into wild-type T. barophilus MP cells. Initially, a pyrF deletion mutant was obtained as a starting point for the construction of further markerless mutants. A deletion of the hisB gene was also constructed in the UBOCC-3256 (Delta pyrF) background, generating a strain (UBOCC-3260) that was auxotrophic for histidine. A functional pyrF or hisB allele from T. barophilus was inserted into the chromosome of UBOCC-3256 (Delta pyrF) or UBOCC-3260 (Delta pyrF Delta hisB), allowing homologous complementation of these mutants. The piezophilic genetic tools developed in this study provide a way to construct strains with multiple genetic backgrounds that will allow further genetic studies for hyperthermophilic piezophilic archaea. PY 2014 PD APR SO Applied And Environmental Microbiology SN 0099-2240 PU Amer Soc Microbiology VL 80 IS 7 UT 000332840700029 BP 2299 EP 2306 DI 10.1128/AEM.00084-14 ID 29818 ER EF