Insights into the pathways of iron- and sulfur-oxidation, and biofilm formation from the chemolithotrophic acidophile Acidithiobacillus ferrivorans CF27
Artikel i vetenskaplig tidskrift, 2014

The iron-oxidizing acidithiobacilli cluster into at least four groups, three of which (Acidithiobacillus ferrooxidans, Acidithiobacillus ferridurans and Acidithiobacillus ferrivorans) have been designated as separate species. While these have many physiological traits in common, they differ in some phenotypic characteristics including motility, and pH and temperature minima. In contrast to At. ferrooxidans and At. ferridurans, all At. ferrivorans strains analysed to date possess the iro gene (encoding an iron oxidase) and, with the exception of strain CF27, the rusB gene encoding an iso-rusticyanin whose exact function is uncertain. Strain CF27 differs from other acidithiobacilli by its marked propensity to form macroscopic biofilms in liquid media. To identify the genetic determinants responsible for the oxidation of ferrous iron and sulfur and for the formation of extracellular polymeric substances, the genome of At. ferrivorans CF27 strain was sequenced and comparative genomic studies carried out with other Acidithiobacillus spp.. Genetic disparities were detected that indicate possible differences in ferrous iron and reduced inorganic sulfur compounds oxidation pathways among iron-oxidizing acidithiobacilli. In addition, strain CF27 is the only sequenced Acidithiobacillus spp. to possess genes involved in the biosynthesis of fucose, a sugar known to confer high thickening and flocculating properties to extracellular polymeric substances.

Genome analysis

Iron oxidation

Biofilm

Sulfur oxidation

Acidithiobacillus ferrivorans

Extracellular polymeric substances

Författare

E. Talla

Centre national de la recherche scientifique (CNRS)

S. Hedrich

Bangor University

Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)

S. Mangenot

Institut de biologie François Jacob

Boyang Ji

Chalmers, Kemi- och bioteknik, Livsvetenskaper

D.B. Johnson

Bangor University

V. Barbe

Institut de biologie François Jacob

V. Bonnefoy

Centre national de la recherche scientifique (CNRS)

Research in Microbiology

0923-2508 (ISSN)

Vol. 165 9 753-760

Ämneskategorier

Mikrobiologi

DOI

10.1016/j.resmic.2014.08.002

Mer information

Senast uppdaterat

2021-08-10