Catabolic protein degradation in marine sediments confined to distinct archaea.

ABSTRACT: Metagenomic analysis has facilitated prediction of a variety of carbon utilization potentials by uncultivated archaea including degradation of protein, which is a wide-spread carbon polymer in marine sediments. However, the activity of detrital catabolic protein degradation is mostly unknown for the vast majority of archaea. Here, we show actively executed protein catabolism in three archaeal phyla (uncultivated Thermoplasmata, SG8-5; Bathyarchaeota subgroup 15; Lokiarchaeota subgroup 2c) by RNA- and lipid-stable isotope probing in incubations with different marine sediments. However, highly abundant potential protein degraders Thermoprofundales (MBG-D) and Lokiarchaeota subgroup 3 were not incorporating ¹³C-label from protein during incubations. Nonetheless, we found that the p

SUBMITTER: Yin X 

PROVIDER: S-EPMC9123169 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature