Micrograph of Mayamaea cf. atomus. Scale bar = 10 μm. Image modified from Ferreira da Silva et al., Plos One, 2019 under Creative Commons license [CC BY].

The Mayamaea pseudoterrestris NIES-4280 genome sequence and gene models were not determined by the Joint Genome Institute (JGI), but were downloaded from NCBI on March 2, 2023. In order to ensure this genome is comparable to those sequenced by the JGI, we applied filters to remove if present: 1) transposable elements, 2) pseudogenes, 3) alternative transcripts and overlapping models, 4) alleles on secondary scaffolds and 5) unsupported short models. This resulted in the removal of 627 models and the generation of the FilteredModels1 (GeneCatalog) gene track. All published models are available in the ExternalModels track. Please note that this copy of the genome is not maintained by NCBI and is therefore not automatically updated. In order to allow comparative analyses with other algal genomes sequenced by the JGI, a copy of this genome is incorporated into PhycoCosm. The JGI Annotation Pipeline was used to add functional annotation to the genes.

The following text is modified from NCBI BioProject PRJDB13502:

Mayamaea pseudoterrestris strain:NIES-4280

A freshwater pennate diatom, Mayamaea pseudoterrestris, is proposed as an alternative strain recommended for ecotoxicological testing. However, the genomic backgrounds for the rapid cell response of diatoms to exposure of heavy metal is little known. M. pseudoterrestris possesses a relatively small genome and shows simple cell responses to heavy metal. In this study, we sequenced the genome of M. pseudoterrestris and revealed the rapid cell responses of M. pseudoterrestris by using RNA-seq analysis and various physiological experiments. The M. pseudoterrestris genome encoded the smallest gene repertoire in freshwater diatoms and is highly similar to that of the model marine diatom, Phaeodactylum tricornutum.