FN Archimer Export Format PT J TI Methanococcoides vulcani sp nov., a marine methylotrophic methanogen that uses betaine, choline and N,N-dimethylethanolamine for methanogenesis, isolated from a mud volcano, and emended description of the genus Methanococcoides BT AF L HARIDON, Stephane CHALOPIN, Morgane COLOMBO, Delphine TOFFIN, Laurent AS 1:1,2,3;2:1,2,3;3:1,2,3;4:1,2,3; FF 1:;2:;3:;4:PDG-REM-EEP-LMEE; C1 UBO, UEB, Inst Univ Europeen Mer IUEM UMR 6197, LMEE, F-29280 Plouzane, France. CNRS, IUEM UMR 6197, LMEE, F-29280 Plouzane, France. IFREMER, UMR 6197, LMEE, F-29280 Plouzane, France. C2 UBO, FRANCE CNRS, FRANCE IFREMER, FRANCE SI BREST SE PDG-REM-EEP-LMEE IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 2.511 TC 30 UR https://archimer.ifremer.fr/doc/00211/32181/30616.pdf LA English DT Article CR MEDECO BO Unknown AB A novel, strictly anaerobic, methylotrophic marine methanogen, strain SLH33(T), was isolated from deep sediment samples covered by an orange microbial mat collected from the Napoli Mud Volcano. Cells of strain SLH33(T) were Gram-stain-negative, motile, irregular cocci that occurred singly. Cells utilized trimethylamine, dimethylamine, monomethylamine, methanol, betaine, N,N-dimethylethanolamine and choline (N,N,N-trimethylethanolamine) as substrates for growth and methanogenesis. The optimal growth temperature was 30 degrees C; maximum growth rate was obtained at pH 7.0 in the presence of 0.5 M Na+. The DNA G+C content of strain SLH33(T) was 43.4 mol%. Phylogenetic analyses based on 16S rRNA gene sequences placed strain SLH33(T) within the genus Methanococcoides. The novel isolate was related most closely to Methanococcoides methylutens TMA-10(T) (98.8% 16S rRNA gene sequence similarity) but distantly related to Methanococcoides burtonii DSM 6242(T) (97.6%) and Methanococcoides alaskense AK-5(T) (97.6%). DNA DNA hybridization studies indicated that strain SLH33(T) represents a novel species, given that it shared less than 16% DNA DNA relatedness with Methanococcoides methylutens TMA-10(T). The name Methanococcoides vulcani sp. nov. is proposed for this novel species, with strain SLH33(T) (=DSM 26966(T)=JCM 19278(T)) as the type strain. An emended description of the genus Methanococcoides is also proposed. PY 2014 PD JUL SO International Journal Of Systematic And Evolutionary Microbiology SN 1466-5026 PU Soc General Microbiology VL 64 IS 6 UT 000340019200022 BP 1978 EP 1983 DI 10.1099/ijs.0.058289-0 ID 32181 ER EF