title: The complete genome sequence and emendation of the hyperthermophilic, obligate iron-reducing archaeon "Geoglobus ahangari" strain 234(T).
abstract: "Geoglobus ahangari" strain 234(T) is an obligate Fe(III)-reducing member of the Archaeoglobales, within the archaeal phylum Euryarchaeota, isolated from the Guaymas Basin hydrothermal system. It grows optimally at 88 °C by coupling the reduction of Fe(III) oxides to the oxidation of a wide range of compounds, including long-chain fatty acids, and also grows autotrophically with hydrogen and Fe(III). It is the first archaeon reported to use a direct contact mechanism for Fe(III) oxide reduction, relying on a single archaellum for locomotion, numerous curled extracellular appendages for attachment, and outer-surface heme-containing proteins for electron transfer to the insoluble Fe(III) oxides. Here we describe the annotation of the genome of "G. ahangari" strain 234(T) and identify components critical to its versatility in electron donor utilization and obligate Fe(III) respiratory metabolism at high temperatures. The genome comprises a single, circular chromosome of 1,770,093 base pairs containing 2034 protein-coding genes and 52 RNA genes. In addition, emended descriptions of the genus "Geoglobus" and species "G. ahangari" are described.
authors.affiliation: Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI USA.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Manzella
authors.affiliation: Department of Physical and Biological Sciences, Western New England University, Springfield, MA USA.
authors.forename: Dawn E
authors.initials: DE
authors.lastname: Holmes
authors.affiliation: Department of Physical and Biological Sciences, Western New England University, Springfield, MA USA.
authors.forename: Jessica M
authors.initials: JM
authors.lastname: Rocheleau
authors.affiliation: Department of Physical and Biological Sciences, Western New England University, Springfield, MA USA.
authors.forename: Amanda
authors.initials: A
authors.lastname: Chung
authors.affiliation: Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI USA.
authors.forename: Gemma
authors.initials: G
authors.lastname: Reguera
authors.affiliation: Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI USA.
authors.forename: Kazem
authors.initials: K
authors.lastname: Kashefi
keywords: Archaeoglobales; Autotroph; Euryarchaeota; Extracellular electron transfer; Fe(III) respiration; Guaymas basin; Hydrothermal vent