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

Bradshaw, Patrick C; Rathi, Anand; Samuels, David C

doi:10.1186/1471-2164-6-136

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

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