realDB: A Genome Database for Red Algae

Cyanidioschyzon merolae

Overview
1. a small (2μm), club-shaped, unicellular haploid red algaadapted to high sulfur acidic hot spring environments (pH 1.5, 45 °C)。
2. The cellular architecture of C. merolae is extremely simple, containing only a single chloroplast and a single mitochondrion and lacking a vacuole and cell wall.
3. The cellular and organelle divisions can be synchronized.
4. For these reasons, C. merolae is considered an excellent model system for study of cellular and organelle division processes, as well as biochemistry and structural biology.
5. The organism's genome was the first full algal genome to be sequenced in 2004; its plastid was sequenced in 2000 and 2003, and its mitochondrion in 1998. The organism has been considered the simplest of eukaryotic cells for its minimalist cellular organization.


Data Source
From Motomichi Matsuzaki,at Department of Biomedical Chemistry, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.


Reference Publication(s)
Motomichi M, et al. Genome sequence of the ultrasmall unicellular red alga Cyanidioschyzon merolae 10D. Nature 428, 653–657.


Statistics of genome

Genome size (Mb)

16.5

GC (%)

55

GC (%) coding sequence (excluding introns)

56.7

CpG occurrence (Obs./Exp.)

1.151

CpG islands

2

Repeat content

313

Number of rRNA units (18S/5.8S/28S + 5S)

3+3

Number of tRNAs

30

Predicted proteins

5771

Gene density (kb per gene)

2.86

Average gene length (bp)

1553

Average transcript length (bp)

1552

Average number of amino acids per polypeptide

581

Average number of exons per gene

1.005

Average exon length (bp)

1527.6

Introns

26

Genes with introns (%)

0.5

Average intron length (bp)

248

Median intergenic distance (bp)

1404.5

Coding sequence (%)

44.9

Protein-coding loci

5331

% coding

50

Introns per gene

0.005

Average intron length (bp)

248

Total sequence length

16,546,747

Total assembly gap length

0

Total number of chromosomes and plasmids

20