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Table 1 General features of plastid and mt genomes in trebouxiophycean algal species

From: Plastid and mitochondrion genomic sequences from Arctic Chlorella sp. ArM0029B

Chloroplast Chlorella sp. ArM0029B C. variabilis NC64 C. vulgaris Coccomyxa Trebouxiophyceae sp.
Length 119989 124579 150613 175731 149707
AT contents (%) 66.08 66.07 68.44 49.29 43.75
# genes 114 114 115* 115 115
# conserved CDS 79 79 79 79 79
# tRNA 32 32 33 33 33
# rRNA 3 3 3 3 3
# introns 1 3 3 1 5
Coding density 53.8 50.5 38.7 39.9/40.8 47.7/48.5
CDS + strand 57 57 26 44 72
rRNA + srand 3 3 3 3 3
tRNA + strand 14 18 17 17 15
CDS - strand 22 22 51 35 8
rRNA - srand 0 0 0 0 0
tRNA - strand 18 14 16 15 17
Percent of +/− 64.9 68.4 40 55.6 77.39
Mitochondria Chlorella sp. ArM0029B Prototheca Helicosporidium sp. Coccomyxa Trebouxiophyceae sp.
Length 65049 55328 49343 65497 74423
AT contents (%) 71.5 74.2 74.4 46.8 46.6
# genes 62 61 60 59 56
# conserved CDS 32 30 32 30 30
# tRNA 27 26 25 26 23
# rRNA 3 3 3 3 3
# introns I (1) I (5) I (4) I (1) II (4) I (7) II (4)
Coding density 50.2 59.8 64.99 48.38 42.64
CDS on + strand 18 13 9 29 29
CDS on - strand 14 18 23 1 1
tRNA/rRNA on + srand 17 12 10 28 26
tRNA/rRNA on - srand 13 17 18 1 0
Percent of +/− 56.5 59.3 68.3 96.7 98.2
  1. *The asterisk indicates information without unnamed hypothetical ORFs in the cp sequence of Chlorella vulgaris C-27.