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Table 1 Repertoire of tRNA genes and codon usage in Tritryps.

From: Gene organization and sequence analyses of transfer RNA genes in Trypanosomatid parasites

Amino acid

Codon

tDNA anticodon

L. major gene copy number

T. brucei gene copy number

T. cruzi gene copy number

Anticodon2

L. major Codon usage %

T. brucei Codon usage %

T. cruzi Codon usage %

Ala

GCT

AGC

2

2

2 (98%) 1

IGC

1.83

2.08

1.61

 

GCC

GGC

0

0

0

 

3.61

1.82

1.62

 

GCA

TGC

1

1

2 (97%)1

UGC

2.02

2.32

2.16

 

GCG

CGC

2

2 (97%) 1

2

CGC

3.62

2.07

2.36

Arg

CGT

ACG

4

3

4 (98%) 1

ICG

1.05

1.59

1.60

 

CGC

GCG

0

0

0

 

3.18

1.45

1.75

 

CGA

TCG

1

1

2

UCG

0.73

0.9

1.58

 

CGG

CCG

1

1

2

CCG

1.38

1.21

1.85

 

AGA

TCT

1

1

2

UCU

0.27

0.68

1.56

 

AGG

CCT

1

1

2

CCU

0.55

1

1.86

Asn

AAT

ATT

0

0

0

GUU

0.53

1.82

1.37

 

AAC

GTT

3

2

4

 

2.07

1.92

1.45

Asp

GAC

GTC

3

2

2

GUC

3.42

2.27

1.60

 

GAT

ATC

0

0

0

 

1.44

2.81

1.57

Cys

TGT

ACA

0

0

0

GCA

0.42

1.09

1.78

 

TGC

GCA

1

2

2

 

1.46

1.13

2.34

Gln

CAA

TTG

1

1

2

UUG

0.76

1.69

1.66

 

CAG

CTG

3

2

4

CUG

3.32

2.1

1.8

Glu

GAA

TTC

1

1

1

UUC

1.14

3.17

2.17

 

GAG

CTC

2

2

4 (95%) 1

CUC

3.32

3.81

2.21

Gly

GGT

ACC

0

0

0

GCC

1.25

2.27

1.51

 

GGC

GCC

4

3

4

 

3.36

1.49

1.95

 

GGA

TCC

1

1

2

UCC

0.64

1.56

2.16

 

GGG

CCC

1

1

2

CCC

1.19

1.39

1.64

His

CAT

ATG

0

0

0

GUG

0.65

1.13

1.37

 

CAC

GTG

2

1

4 (98%) 1

 

2.04

1.3

1.64

Ile

ATT

AAT

3

2

4

IAU

0.82

1.9

1.42

 

ATC

GAT

0

0

0

 

1.88

1.16

1.10

 

ATA

TAT

1

1

2

UAU

0.27

1

0.75

Leu

TTA

TAA

1

1

2

UAA

0.16

0.98

0.89

 

TTG

CAA

1

1

2

CAA

1.1

1.96

2.33

 

CTT

AAG

3

1

4

IAG

1.11

2.23

1.59

 

CTC

GAG

0

0

0

 

2.5

1.56

1.27

 

CTA

TAG

1

1

2

UAG

0.47

0.82

0.54

 

CTG

CAG

2

1

2

CAG

3.83

1.85

1.95

Lys

AAA

TTT

1

1

2

UUU

0.54

2.06

1.94

 

AAG

CTT

3

3

4

CUU

2.78

2.66

1.88

Met

ATG

CAT

4

3

6

CAU

2.25

2.34

2.12

Phe

TTT

AAA

0

0

0

GAA

1.04

2.05

2.17

 

TTC

GAA

2

2

4

 

1.91

1.59

1.49

Pro

CCT

AGG

2

1

2

IGG

0.86

1.11

1.05

 

CCC

GGG

0

0

0

 

1.24

1.11

1.03

 

CCA

TGG

1

1

2

UGG

1.05

1.39

1.44

 

CCG

CGG

2

1

2

CGG

2.61

1.18

1.57

Ser

TCT

AGA

1

1

2

IGA

1.02

1.26

1.37

 

TCC

GGA

0

0

0

 

1.69

1.25

1.24

 

TCA

TGA

1

1

2 (98%) 1

UGA

0.73

1.35

1.41

 

TCG

CGA

1

1

2

CGA

2.17

1.16

1.2

 

AGT

ACT

0

0

0

GCU

0.73

1.51

1.21

 

AGC

GCT

2 (98%) 1

2

2

 

2.6

1.35

1.60

Thr

ACT

AGT

3

1

2

IGU

0.68

1.3

1.13

 

ACC

GGT

0

0

0

 

1.77

1.21

1.18

 

ACA

TGT

1

1

2

UGU

1.04

1.74

1.74

 

ACG

CGT

2

1

2

CGU

2.48

1.48

1.98

Trp

TGG

CCA

1

1

2

CCA

1.07

1.09

2.33

Tyr

TAT

ATA

0

0

0

GUA

0.4

1.13

0.84

 

TAC

GTA

3

1

2

 

1.99

1.41

1.04

Val

GTT

AAC

2

2

2

IAC

0.86

2.29

1.49

 

GTC

GAC

0

0

0

 

1.92

1.14

1.26

 

GTA

TAC

1

1

2

UAC

0.54

1.26

0.83

 

GTG

CAC

2

1

1

CAC

3.82

2.87

2.65

SeC

TGA

TCA

1

2

8

    

TOTAL

  

83

66

120

    
  1. 1 One isodecoder tRNA was identified in L. major, one in T. brucei and six in T. cruzi. The percentage of identity between isodecoders is shown between parentheses. The rest of the genes with the same anticodon are 100% identical.
  2. 2 Underlined anticodons are those that recognize more than one codon; for exemple, the Tyr anticodon GUA recognizes two codons, TAT and TAC, since anticodon Tyr-AUA is missing in trypanosomatids. A1 of the anticodon is modified to inosine (I).