H. James Tripp

TL;DR: P. ubique, the first cultured member of the SAR11 clade, has the smallest genome and encodes the smallest number of predicted open reading frames known for a free-living microorganism.

TL;DR: It is shown that SAR11 requires exogenous sources of reduced sulphur, such as methionine or 3-dimethylsulphoniopropionate (DMSP) for growth, and results indicate that ‘Cand. P. ubique’ relies exclusively on reducing sulphur compounds that originate from other plankton.

TL;DR: Metagenomic analysis of flow cytometry–sorted cells shows that unicellular N2-fixing cyanobacteria in “group A” (UCYN-A) lack genes for the oxygen-evolving photosystem II and for carbon fixation, which has implications for oceanic carbon and nitrogen cycling and raises questions regarding the evolution of photosynthesis and N2 fixation on Earth.

TL;DR: SAR11 strain HTCC1062 (‘Pelagibacter ubique’), the first cultivated member of the extraordinarily abundant SAR11 clade, expresses a proteorhodopsin gene when cultured in autoclaved seawater and in its natural environment, the ocean, which functions as a light-dependent proton pump.

TL;DR: The DOE-JGI Microbial Genome Annotation Pipeline performs structural and functional annotation of microbial genomes that are further included into the Integrated Micro microbial Genome comparative analysis system.