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**What is HSDatabase?**

Backgrounds:

The idea of HSDatabase project comes from several important milestone articles in the psychrophilic algae research. The aims of the database is to develop a platform for comprehensive analysis of the eukaryotic species, particularly those who can survive in harsh environment, to unravel the role of gene duplication in genome adaptation.
  - Draft genome sequence of the Antarctic green alga Chlamydomonas sp. UWO241 (2021)
  - Adaptation to Extreme Antarctic Environments Revealed by the Genome of a Sea Ice Green Alga (2020)
  - A constitutive stress response is a result of low temperature growth in the Antarctic green alga Chlamydomonas sp. UWO241 (2021)
  - Photosynthetic Adaptation to Polar Life: Energy Balance, Photoprotection and Genetic Redundancy (2021)
  - HSDFinder: a BLAST-based strategy for identifying highly similar duplicated genes in eukaryotic genomes (2021)
  - HSDatabase – Identification and functional annotation of highly similar duplicated genes in eukaryotic genomes(2022)
  - Comprehensive analysis of gene duplications in eukaryotic genomes unravelling the convergent adaptive and nonadaptive evolution (2022)

So far, the first step via designing the HSDFinder tool has been reached after so many trails, the selected eukaryotic species have been collected into the HSDatabase. The comprehensive analysis is on the way.

**How to prepare the species files?**

As for the HSDatabase itself, we have offered the species request option which allows users to submit the  species within users' interest.

**How to document that data in HSDatabase?**

There are several necessary files to be documented into the database.
Request a new species
If you wish that a new species would be added in HSDatabase, please use the following form. The new species have to meet the following requirement:
* Peptide database
* Chromosomal location of the genes
* Genome Annotation
The HSDatabase is based on the data provided by the Ensembl FTP site. If your species is stored in the FTP site, it will be a valuable help to provide us the FTP links to the peptide database. At least, a link to the species information is required.

<Last updated by Xi Zhang on Oct 6th,2021> Upcoming

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