The enigmatic mitochondrial genome of Rhabdopleura compacta(Pterobranchia) reveals insights into selection of an efficient tRNA system and supports monophyly of Ambulacraria

Table 3 Mitochondrial Genetic Code of Deuterostomia and selected Protostomia.

	Codon AUA	Codon AAA	Codon AGG	Codon AGA	Anticodon loop of tRNA_Asn	Anticodon loop of tRNA_Lys	Source/CodTab
Rhabdopleura compacta	Ile	Lys	Lys	Ser	UU GUU AC	CU C UU AA	this study, table 1
Balanoglossus spp.	Ile	-	-	Ser	CU GUU AA	CU C UU AA	[30, 31]
Saccoglossus kowalevskii	Ile	Lys	-	Ser	CU GUU AA	CU UUU AA	NC_007438
Echinodermata	Ile	Asn	Ser	Ser	CC GUU AA	CU C UU AA	CodTab 9
Tunicata	Met	Lys	Gly	Gly	CU GUU AA	CU UUU AA	CodTab13
Vertebrata	Met	Lys	term	term	CU GUU AA	CU UUU AA	CodTab 2
Cephalochordata	Met	Lys	-	Ser	CU GUU AA	CU UUU AA	CodTab 5
invertebrates	Met	Lys	Ser	Ser		CU UUU AA	CodTab 5
hypothetical ancestral state in Arthropoda	Met	Lys	Lys/Ser	Ser		CU C UU AA	[47]

The variable codon assignments within mtDNA of Deuterostomia and selected anticodon loop sequences (the anticodon sequences are underlined) are shown. The entire genetic codes available at the web site http://www.ncbi.nlm.nih.gov/Taxonomy/Utils/wprintgc.cgi are given by the codon table number (CodTab). Amino acids are shown in the 3-letters-abbreviations. Low frequent codons are given by cursive amino acid abbreviations while unpredictable or completely missing codons are shown by dash.

ISSN: 2730-7182