Table 1.

General features of Thermococcus kodakaraensis genome along with three Pyrococcus genomes

	T. kodakaraensis	P. abyssi	P. horikoshii	P. furiosus
Genome features
Genome size (bp)	2,088,737	1,765,118	1,738,505	1,908,256
Protein-coding regions	92.1%	91.1%^a	91.2%^a	92.5%^a
GC content	52.0%	44.7%	41.9%	40.8%
Stable RNAs
tRNAs	46	46	46	46
tRNAs with introns	Trp, Met	Trp, Met	Trp, Met	Trp, Met
rRNAs	16S-23S	16S-23S	16S-23S	16S-23S
	5S (×2), 7S	5S (×2), 7S	5S, (×2), 7S	5S (×2), 7S
Others	RNaseP	RNaseP	RNaseP	RNaseP
CDSs	2306	1784^a	2064^a	2065^a
Mobile elements
Inteins	16	14^b	14^b	10^b
Transposases	7	5	3	>30
Virus-related regions	4	0	2	0
Long clusters of tandem repeats^c
R1 family	0	1^c	3^c	0^c
R2 family	3	3^c	3^c	7^c

↵a Based on AL09836 for P. abysis, BA000001 for P. horikoshii, and AL009950 for P. furiosus from European Bioinformatics Institute (EBI).
↵b InBASE (Perler 2002).
↵c Zivanovic et al. (2002).

Complete genome sequence of the hyperthermophilic archaeon Thermococcus kodakaraensis KOD1 and comparison with Pyrococcus genomes