Skip to main content

Table 2 Base composition at each codon position in mtDNA-encoded membrane and soluble protein-coding transcripts. Analysis was performed on transcripts from humans and the species from Table 1 that encode soluble proteins in mtDNA.

From: Mitochondrial-encoded membrane protein transcripts are pyrimidine-rich while soluble protein transcripts and ribosomal RNA are purine-rich

  Membrane Proteins Soluble Proteins
  %A %G %C %T %Pu %AT %A %G %C %T %Pu %AT
Saccharomyces cerevisiae
Codon pos. 1 28.1 26.4 10.3 35.2 54.5 63.3 42.5 20 8.5 29.1 62.4 71.6
Codon pos. 2 21.3 12.6 22 44.1 33.9 65.3 36.4 13.3 15 35.3 49.6 71.6
Codon pos. 3 42.9 5.14 7.49 44.5 48 87.4 42.5 4.57 3.9 49 47.1 91.5
All 30.7 14.7 13.3 41.3 45.5 72 40.5 12.6 9.2 37.8 53.1 78.3
Arabidopsis thaliana
Codon pos. 1 26 27.6 20.5 26 53.6 51.9 33 26 22 19.1 59.1 52.1
Codon pos. 2 21.5 17.7 23.7 37.2 39.2 58.6 29 22 22 27.4 51 56.5
Codon pos. 3 26.5 17.8 17.5 38.2 44.3 64.8 29.8 22.2 22 26.3 51.9 56.1
All 24.7 21 20.5 33.8 45.7 58.4 30.6 23.4 22 24.3 54 54.9
Porphyra purpurea
Codon pos. 1 30.8 23.4 14.7 31.1 54.2 61.9 41.8 21.2 14 23.1 63 64.9
Codon pos. 2 21.5 14.6 20.9 43 36.1 64.4 37.6 14.9 18 29.4 52.5 67.1
Codon pos. 3 34.9 11.4 15.4 38.3 46.3 73.2 39.9 12.2 14 34 52.1 73.9
All 29.1 16.5 17 37.5 45.5 66.5 39.8 16.1 15 28.8 55.9 68.6
Dictyostelium discoideum
Codon pos. 1 35.9 28.3 7.92 27.9 64.2 63.8 45.4 23.6 11 20.4 69 65.8
Codon pos. 2 25.7 15.3 15.9 43.1 41 68.8 39.4 17.7 13 30.1 57.2 69.6
Codon pos. 3 57.8 7.24 4.83 30.2 65 87.9 61.2 10.1 4.1 24.6 71.3 85.8
All 39.8 16.9 9.55 33.7 56.7 73.5 48.7 17.2 9.1 25 65.8 73.7
Chondrus crispus
Codon pos. 1 30.5 20.3 13.8 35.4 50.8 65.9 41.8 16.1 14 28.5 57.9 70.3
Codon pos. 2 21.4 13.5 19.8 45.3 34.9 66.7 35.7 13.9 17 33.6 49.6 69.3
Codon pos. 3 35.9 7.92 7.75 48.4 43.8 84.3 46 6.81 7.2 40 52.8 86
All 29.3 13.9 13.8 43.1 43.2 72.3 41.2 12.3 13 34 53.4 75.2
Marchantia polymorpha
Codon pos. 1 27 28.5 16 28.6 55.5 55.5 35.2 23 19 22.9 58.2 58.1
Codon pos. 2 20.8 16.5 21.1 41.6 37.3 62.4 32.7 19.6 19 28.5 52.3 61.1
Codon pos. 3 28.5 14.6 13.9 43 43.1 71.5 36 15.3 13 35.3 51.3 71.3
All 25.4 19.8 17 37.7 45.3 63.2 34.6 19.3 17 28.9 53.9 63.5
Metridium senile
Codon pos. 1 21.7 18.5 19.8 40 40.2 61.7 30.4 28.1 17 24.6 58.5 54.9
Codon pos. 2 25.9 17.7 16.4 40 43.6 65.9 31.7 20.1 17 30.8 51.8 62.5
Codon pos. 3 26.4 25.1 14.7 33.8 51.5 60.2 39.3 13.4 11 36.6 52.7 75.9
All 24.6 20.4 17 37.9 45.1 62.6 33.8 20.5 15 30.7 54.3 64.4
Chlamydomonas reinhardtii
Codon pos. 1 24.7 30.5 17.5 27.2 55.2 51.9 25.2 24.4 32 18.7 49.6 43.9
Codon pos. 2 16.4 19.3 21.5 42.8 35.8 59.2 34.1 14.4 19 32.8 48.5 66.9
Codon pos. 3 15.5 19.8 26.3 38.4 35.3 53.9 21.7 23.6 24 31.2 45.3 52.8
All 18.9 23.2 21.8 36.1 42.1 55 27 20.8 25 27.6 47.8 54.6
Homo sapiens
Codon pos. 1 29.5 19.6 26.9 24 49.1 53.5       
Codon pos. 2 22.8 11.4 29.9 36 34.2 58.8       
Codon pos. 3 34.3 8.38 39 18.4 42.7 52.7       
All 28.9 13.1 31.9 26.1 42 55