Table 8.

Type of aminoacyl-tRNA synthetase represented in a given taxon

Taxonomic groupaAminoacyl-tRNA synthetase typeb
FLIMVSPTAYHQNKDECWRG
Proteobacteria
 βBBBABBBBBBBBBB?B
 γBBBABBBBBBBBBB?B
 αBBB/AA/BB/ABBBBA/BABBBBB
 ɛBBBBBBBBBABBBBBB
Bacillus-Streptococcus
 BESBBBBBBBBBBBBBB?B
C. acetobutylicum BBABBBBBBABBBB?A
 MycoplasmaBBBBBABBBBBBBBBA
 MycobacteriaBBABBBBBBBB/ABBBBA
CyanobacteriaBBBBBBBBBBBBBB?B
Aquifex BBBBBBBBBBBBBBBB
Thermotoga BBBBBBBBBBBBBBBB
Chlamydia BBAABBBBBBBBBB?B
SpirochetesABAABA/BBBBAABBB?A
Cytophaga-Chlorobium BBAABABBBA/BBBBB?A
Deinococcus-Thermus BBABBABBBBBBBBAA
ArchaeaMMCMCmCMCPMCMCMCmMCPMCMPmMCmC
EukaryotesAAb2,1b1B3b1,4B2B4Ab4BPBAAAB2A
  • a Abbreviations are defined in Table 7footnote a.

  • b Abbreviations: A, synthetase of the archaeal genre; B, synthetase of the bacterial genre. In the Archaea and Eukaryotes section of table: A, synthetase of the archaeal genre; B, synthetase of the bacterial genre; b, eukaryotic synthetase of archaeal genre with closest relatives being bacterial; M, Archaea are monophyletic and exclude the eukaryotes; m, Archaea are monophyletic but include the eukaryotes; C, Archaea comprise euryarchaeal and crenarchaeal groups, and a signature exists for them; P, polyphyletic. Closest relatives: 1, spirochetes; 2, Chlamydia; 3,Proteobacteria; 4, Porphyromonas. ?, uncertain.