Cyanidioschyzon merolae Assembly and Gene Annotation

About Cyanidioschyzon merolae

Cyanidioschyzon merolae is a unicellular red alga from the phylum Rhodophyta and is one of the most primitive red algae. Rhodophyta is an evolutionarily interesting group that falls in Archaeplastida along with green plants but has also given rise to highly diverse groups of protists, including the photosynthetic and non-photosynthetic Chromalveolata. C. merolae can live in acidic hot springs, with pH below 2 and at 45°C.


The nuclear genome is compact (16 Mbp), comprising 20 chromosomes with 5,331 predicted genes. Interestingly, only 26 of the predicted genes have introns.


The genome annotation for Cyanidioschyzon merolae has been imported from Cyanidioschyzon merolae Genome project.

The non-coding RNA genes have been annotated using tRNAScan-SE (Lowe, T.M. and Eddy, S.R. 1997) , RFAM (Griffiths-Jones et al 2005), and RNAmmer (Lagesen K.,et al 2007); additional analysis tools have also been applied.



  1. Genome sequence of the ultrasmall unicellular red alga Cyanidioschyzon merolae 10D.
    Matsuzaki M, Misumi O, Shin-I T, Maruyama S, Takahara M, Miyagishima SY, Mori T, Nishida K, Yagisawa F, Nishida K et al. 2004. Nature. 428:653-657.
  2. Image credit: NEON (Own work) [CC-BY-SA-3.0 ( or CC-BY-SA-3.0 (], via Wikimedia Commons.

More information

General information about this species can be found in Wikipedia.



AssemblyASM9120v1, INSDC Assembly GCA_000091205.1, Jul 2007
Database version94.1
Base Pairs16,728,945
Golden Path Length16,728,945
Genebuild byENA
Genebuild methodImported from ENA
Data sourceCyanidioschyzon merolae Genome Project

Gene counts

Coding genes5,009
Gene transcripts5,009

About this species