Fatty Acid and Hopanoid Adaption to Cold in the Methanotroph Methylovulum psychrotolerans.

ABSTRACT: Three strains of aerobic psychrotolerant methanotrophic bacteria Methylovulum psychrotolerans, isolated from geographically remote low-temperature environments in Northern Russia, were grown at three different growth temperatures, 20, 10 and 4°C and were found to be capable of oxidizing methane at all temperatures. The three M. psychrotolerans strains adapted their membranes to decreasing growth temperature by increasing the percent of unsaturated fatty acid (FAs), both for the bulk and intact polar lipid (IPL)-bound FAs. Furthermore, the ratio of βOH-C_16:0 to n-C_16:0 increased as growth temperature decreased. The IPL head group composition did not change as an adaption to temperature. The most notable hopanoid temperature adaptation of M. psyc

SUBMITTER: Bale NJ 

PROVIDER: S-EPMC6460317 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature