Hydrogenase Gene Distribution and H2 Consumption Ability within the Thiomicrospira Lineage.

ABSTRACT: Thiomicrospira were originally characterized as sulfur-oxidizing chemolithoautotrophs. Attempts to grow them on hydrogen failed for many years. Only recently we demonstrated hydrogen consumption among two of three tested Thiomicrospira and posited that hydrogen consumption may be more widespread among Thiomicrospira than previously assumed. Here, we investigate and compare the hydrogen consumption ability and the presence of group 1 [NiFe]-hydrogenase genes (enzyme catalyzes H2↔2H(+) + 2e(-)) for sixteen different Thiomicrospira species. Seven of these Thiomicrospira species encoded group 1 [NiFe]-hydrogenase genes and five of these species could also consume hydrogen. All Thiomicrospira species exhibiting hydrogen consumption were from hydrothermal vents along the Mid-Atlantic ridge or Ea

SUBMITTER: Hansen M 

PROVIDER: S-EPMC4744846 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature