Unique genes in plants: specificities and conserved features throughout evolution

Table 1 Features of unique genes and their promoter

	All other nuclear genes	U{1:0}E genes	U{1:1} genes	U{1:m} genes
*A. thaliana*
Mean intron number	4.28	0.98	5.01	4.33
Mean protein size	392.88	133.53	318.05	318.75
Median protein size	352.00	107.00	262.00	249.50
Mean intron number/100 aa	1.09	0.73	1.57	1.35
TATA-box presence	18.8%	26.8%	10.3%	11.9%
TELO-box presence	10.9%	10.0%	15.2%	14.7%
SORLIP2-box presence	11.9%	14.1%	16.1%	15.2%
CAAT-box presence	26.2%	27.7%	34.9%	40.3%
*O. sativa*
Mean intron number	3.85	0.85	4.89	4.10
Mean protein size	406.06	142.82	321.15	319.10
Median protein size	362.00	117.00	262.00	266.00
Mean intron number/100 aa	0.95	0.60	1.52	1.28
TATA-box presence	17.7%	16.9%	4.1%	7.0%
TELO-box presence	9.1%	6.4%	11.0%	12.9%
SORLIP2-box presence	38.1%	31.4%	41.2%	36.9%
CAAT-box presence	34.5%	33%	38.3%	31.2%

Only genes with CDS fully covered by transcripts (EST and/or cDNA) were used for the determination of intron numbers and protein sizes. TFBS in promoter regions were searched for only in promoters of genes with a UTR longer than 50 nucleotides as shown by at least one cognate transcript. The complete nuclear gene set minus the 3 classes of unique genes defines the "All other nuclear genes" class.

ISSN: 2730-7182