. Author manuscript; available in PMC: 2009 Mar 9.

Published in final edited form as: Mol Biol Evol. 2007 Nov 1;25(1):187–198. doi: 10.1093/molbev/msm238

Table 1.

Comparative Organization of tRNA Array Units in Entamoeba Species

tRNA Isoacceptor type	Entamoeba dispar SAW760^a	Entamoeba moshkovskii FIC	Entamoeba terrapinae M	Entamoeba invadens IP-1
Ala^AGC	[A^AGC]	[A^AGC]	[A^AGC], [ADSS]	[A^AGC]
Ala^TGC	[ASD]	[ADSSD]	[ADSD], [ADRML]	[ASS]
Ala^CGC	[ALL]	[ALL]	[ALLSL5]	[ALI]
Arg^ACG	[R5]	[R5]	[IR]	[VMEDR5E]
Arg^CCG	#	#	#	#
Arg^CCT	[RT]	[RT]	[PTRL]	[PPTRL]
Arg^TCG	[MR]	[MR]	[MRM5], [ADRML]	[MR]
Arg^TCT	[R^TCT]	[R^TCT]	[R^TCT]	[R^TCT]
Asn^GTT	[NK]	[NK]	[NK1], [NK2]	[NKQCK], [NK]
Asp^GTC	[ASD], [SD]	[ADSSD]	[ADSD], [ADSS], [ADRML]	[VMEDR5E], [FVDTX]^b, [EIDLLL]
Cys^GCA	[SPPCK], [SQCK]	[SPPPCK], [SQCK]	[CK], [SQCK]	[NKQCK]
Gln^CTG	[SQCK]	[SQCK]	[SQCK], [SQK]	[NKQCK]
Gln^TTG	[TQ]	[TQ]	[VQ51], [VQ52]	[TQQ]
Glu^CTC	[VME5]	[VME5]	[VME]	[VMEDR5E] [EIDLLL]
Glu^TTC	[YE]	[YE]	[YE]	[VMEDR5E], [YE]
Gly^CCC	#	#	#	#
Gly^GCC	[G^GCC]	[G^GCC]	[G^GCC]	[G^GCC]
Gly^TCC	[G^TCC]	[G^TCC]	[G^TCC]	#, #SGI
His^GTG	[H^GTG]	[H^GTG]	[H^GTG]	[H^GTG]
Ile^AAT	[WI]	[WI1], [WI2]	[IR], [WI1], [WI2]	[WI], [EIDLLL]
Ile^TAT	#	#	#	[ALI], #SGI
Leu^AAG	[LT]	[LT], [PL]	[PTRL], [LT], [PL]	[PPTRL]
Leu^CAG	[LS]	[LS]	[ALLSL5], [LLLSL5]	[LS]
Leu^CAA	[ALL]	[ALL]	[ALLSL5], [LLLSL5]	[ALI], [EIDLLL]
Leu^TAA	[ALL], #	[ALL], #	[ALLSL5], [ADRML], [LLLSL5]	[EIDLLL]
Leu^TAG	#	#	#	#
Lys^CTT	[NK]	[NK]	[NK1], [NK2]	[NKQCK], [NK]
Lys^TTT	[SPPCK], [SQCK]	[SPPPCK], [SQCK]	[SQK], [CK], [SQCK]	[NKQCK]
eMet^CAT	[MR]	[MR]	[MRM5], [ADRML]	[MR]
iMet^CAT	[VME5]	[VME5], [MV5]	[VME]	[VMEDR5E]
Phe^GAA	[VF]	[VF]	[VF]	[FVV5], [FVDTX]^b
Pro^CGG	[SPPCK]	[SPPPCK]	[SPPP]	[PPTRL]
Pro^AGG	[SPPCK]	[SPPPCK]	[SPPP]	[SPP]
Pro^TGG	[P^TGG]	[SPPPCK]	[PTRL], [PL], [SPPP]	[SPP], [PPTRL]
Ser^AGA	[SPPCK], [SQCK]	[SPPPCK], [SQCK]	[SQK], [SQCK], [SPPP]	[SPP]
Ser^GCT	[ASD]	[ADSSD]	[ADSD], [ADSS]	[ASS]
Ser^CGA	[LS]	[LS]	[ALLSL5], [LLLSL5]	[LS], #SGI
Ser^TGA	[SD]	[ADSSD]	[ADSS]	[ASS]
Thr^AGT	[LT]	[LT], [RT]	[PTRL], [LT]	[PPTRL]
Thr^CGT	[TQ]	[TQ]	#	[TQQ]
Thr^TGT	[TX]^b	[TX]^b	[TX]^b	[FVDTX]^b
Trp^CCA	[WI]	[WI]	[WI1], [WI2]	[WI]
Tyr^GTA	[YE]	[YE]	[YE]	[YE]
Val^CAC	[VME5]	[VME5]	[VQ51], [VQ52]	[FVV5]
Val^GAC	[VF]	[VF]	[VF]	[FVV5], [FVDTX]^b
Val^TAC	[V5]	[MV5]	[VME]	[VMEDR5E]

Note.—The tRNA gene content of each array is shown using the single-letter amino acid code. The 5S RNA gene is identified by “5” when present. Where 2 distinct variants of an array exist, the numbers 1 and 2 are appended to the gene complement. The E. invadens array containing only 5S RNA genes is not listed. # indicates dispersed tRNA genes. The dispersed cluster of 3 genes in E. invadens is indicated by #SGI.

Unit organization in Entamoeba histolytica HM-1:IMSS (Clark, Ali, et al. 2006) and E. dispar SAW760 is identical except for [NK], which exists as 2 distinct arrays in E. histolytica but only 1 in E. dispar.

X is a gene encoding the same unidentified small RNA in one array in each species (Banerjee and Lohia 2003; Clark, Ali, et al. 2006).