realDB: A Genome Database for Red Algae

Porphyridium purpureum

Overview
1. The 8,355 predicted genes in P. purpureum, hundreds of which are likely to be implicated in a history of horizontal gene transfer, reside in a genome of 19.7 Mbp with 235 spliceosomal introns.
2. Analysis of light-harvesting complex proteins reveals a nuclear-encoded phycobiliprotein in the alga.
3. We uncover a complex set of carbohydrate-active enzymes, identify the genes required for the methylerythritol phosphate pathway of isoprenoid biosynthesis, and find evidence of sexual reproduction.
4. Analysis of the compact, function-rich genome of P. purpureum suggests that ancestral lineages of red algae acted as mediators of horizontal gene transfer between prokaryotes and photosynthetic eukaryotes, thereby significantly enriching genomes across the tree of photosynthetic life.


Data Source
From Debashish Bhattacharya, at Department of Ecology, Evolution and Natural Resources and Institute of Marine and Coastal Science, Rutgers University, New Brunswick, New Jersey 08901, USA.


Reference Publication(s)
Bhattacharya D, et al. Genome of the red alga Porphyridium purpureum. Nat. Commun. 4: 1941.


Statistics of genome

Genome size (Mb)

19.7

gene models

8355

Introns

235

Total sequence length

19,451,899

Total assembly gap length

0

Number of contigs

3,014

Contig N50

20,534

Contig L50

270

Total number of chromosomes and plasmids

0