Wallemia ichthyophaga EXF-994 (GCA_000400465) (Wallemia_ichthyophaga_version_1.0)

Wallemia ichthyophaga EXF-994 (GCA_000400465) Assembly and Gene Annotation

About Wallemia ichthyophaga EXF-994 (GCA_000400465)

Wallemia ichthyophaga is one of the three species of fungi in the genus Wallemia, which in turn is the only genus of the class Wallemiomycetes.

W. ichthyophaga requires at least 1.5 M NaCl for in-vitro growth (or some other osmolyte for an equivalent water activity), and it thrives even in saturated NaCl solution. This makes it the most halophilic fungus known and distinguishes it from halotolerant (e.g. Aureobasidium pullulans) and extremely halotolerant fungi (e.g. Hortaea werneckii), which are able to grow well even in the absence of salt in the medium. These increase in size almost four-fold when exposed to high salinity, and the cell wall experiences a three-fold thickening.. This results in a substantially decreased functional cell volume and is thought to be one of the halotolerance mechanisms of this species. Contrary to what was observed for the extremely halotolerant H. werneckii, in W. ichthyophaga there are almost no expansions in metal cation transporter genes and their expression is not salt-responsive. On the other hand, there is a vast enrichment of hydrophobins (proteins of cell wall with diverse functions and many biotechnological uses), which contain an unusually high proportion of acidic amino acids. High proportion of acidic amino acids is thought to be an adaptation of proteins to high concentrations of salt.

(Text and image from Wikipedia, the free encyclopaedia.)


The assembly presented is the Wallemia ichthyophaga version 1.0 assembly submitted to INSDC with the assembly accession GCA_000400465.1.


The annotation presented is derived from annotation submitted to INSDC with the assembly accession GCA_000400465.1, with additional non-coding genes derived from Rfam. For more details, please visit INSDC annotation import.

More information

General information about this species can be found in Wikipedia.



AssemblyWallemia ichthyophaga version 1.0, INSDC Assembly GCA_000400465.1,
Database version104.1
Golden Path Length9,655,632
Genebuild by
Genebuild methodImport
Data sourceEuropean Nucleotide Archive

Gene counts

Coding genes4,865
Non coding genes266
Small non coding genes264
Long non coding genes2
Gene transcripts5,141

About this species