@article{mbs:/content/journal/ijsem/10.1099/00207713-35-2-131, author = "Janvier, Monique and Frehel, Claude and Grimont, Francine and Gasser, Francis", title = "Methylophaga marina gen. nov., sp. nov. and Methylophaga thalassica sp. nov., Marine Methylotrophs", journal= "International Journal of Systematic and Evolutionary Microbiology", year = "1985", volume = "35", number = "2", pages = "131-139", doi = "https://doi.org/10.1099/00207713-35-2-131", url = "https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-35-2-131", publisher = "Microbiology Society", issn = "1466-5034", type = "Journal Article", abstract = "After enrichment in a medium containing sea water and methanol, 42 methylotrophic strains were isolated. All of these strains were gram-negative, strictly aerobic, motile, rod-shaped organisms that required vitamin B12. None grew on methane or on complex nutrient media supplemented or not supplemented with NaCl. All but 2 strains grew on methanol, methylamine, and fructose, 17 strains grew on dimethylamine, and 10 strains grew on trimethylamine. Fructose was the only multicarbon compound tested that was used as a growth substrate. All 11 strains tested used the ribulose monophosphate pathway of carbon assimilation. Depending on the strain, methylamine was oxidized either through a methylamine dehydrogenase or through a methylglut-amate dehydrogenase. The mean guanine-plus-cytosine content of 33 strains was 43 mol%. Based on deoxyribonucleic acid-deoxyribonucleic acid hybridization, two related groups were identified among 11 strains examined. We propose a new genus, Methylophaga, with two species, Methylophaga marina (type species) and Methylophaga thalassica. There was no significant deoxyribonucleic acid hybridization between Methylophaga and the terrestrial obligate methanol utilizers tested. The type strains of M. marina and M. thalassica are strains ATCC 35842 (= NCMB 2244) and ATCC 33146 (= NCMB 2163), respectively.", }