Mycobiology.  2014 Sep;42(3):241-248. 10.5941/MYCO.2014.42.3.241.

In Silico Sequence Analysis Reveals New Characteristics of Fungal NADPH Oxidase Genes

Affiliations
  • 1Department of Forest Sciences, University of Helsinki, 00014 Helsinki, Finland. yonglee@snu.ac.kr
  • 2Fungal Bioinformatics Laboratory, Center for Fungal Pathogenesis, and Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Korea.
  • 3Department of Agricultural Sciences, University of Helsinki, 00014 Helsinki, Finland.
  • 4Center for Fungal Genetic Resources, Plant Genomics and Breeding Institute, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Korea.

Abstract

NADPH oxidases (Noxes), transmembrane proteins found in most eukaryotic species, generate reactive oxygen species and are thereby involved in essential biological processes. However, the fact that genes encoding ferric reductases and ferric-chelate reductases share high sequence similarities and domains with Nox genes represents a challenge for bioinformatic approaches used to identify Nox-encoding genes. Further, most studies on fungal Nox genes have focused mainly on functionality, rather than sequence properties, and consequently clear differentiation among the various Nox isoforms has not been achieved. We conducted an extensive sequence analysis to identify putative Nox genes among 34 eukaryotes, including 28 fungal genomes and one Oomycota genome. Analyses were performed with respect to phylogeny, transmembrane helices, di-histidine distance and glycosylation. Our analyses indicate that the sequence properties of fungal Nox genes are different from those of human and plant Nox genes, thus providing novel insight that will enable more accurate identification and characterization of fungal Nox genes.

Keyword

Fungal genome; NADPH oxidase; Nox; Phylogenetics; ROS

MeSH Terms

Biological Processes
Computer Simulation*
Eukaryota
Genome
Genome, Fungal
Glycosylation
Humans
NADP
NADPH Oxidase*
Oomycetes
Oxidoreductases
Phylogeny
Plants
Protein Isoforms
Reactive Oxygen Species
Sequence Analysis*
NADP
NADPH Oxidase
Oxidoreductases
Protein Isoforms
Reactive Oxygen Species
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