Features of psychrophilic and thermophilic methanotrophic microorganisms. M.S. BAKUNINA, A.L. PONOMAREVA, S.S. DUBOVCHUK, A.I. ESKOVA, R.B. SHAKIROV, A.I. OBZHIROV
Keywords:
methanotrophic bacteria, methane, methane-oxidizing archaeaAbstract
Features of psychrophilic and thermophilic methanotrophic microorganisms. M.S. BAKUNINA1,2,
A.L. PONOMAREVA1, S.S. DUBOVCHUK1,2, A.I. ESKOVA1,2, R.B. SHAKIROV1, A.I. OBZHIROV1 (1V.I. Il’ichev
Pacific Oceanological Institute, FEB RAS, Vladivostok, 2Far Eastern Federal University, Vladivostok).
This paper considers some structural-functional and physiological-biochemical features of methanotrophs living
in ecotopes with low and high temperatures. It has been established that cold ecosystems are characterized by type I methanotrophs, with the assimilation of carbon along the ribulose monophosphate pathway, the predominance of fatty acids with 16 carbon atoms, and the presence of membrane methane monooxygenase (MMO). Representatives of both types are detected among thermophilic methanotrophs, but type II with the presence of soluble and membrane forms of MMO is dominant, where, along with the RMF cycle, minor serine and RBF Ci-assimilation pathways are realized.