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tRNAMet-i (cytosolic)

Codons and anticodons
codons read by: codon usage
AUG anticodon CAU 24.5

Codon usage statistics are from the Codon Usage Database at the Kazusa DNA Research Institute.

In the sequences below, several regions of interest have been marked, including the low stability regions (TATA-like sequences) in the 5'-flanks thought to be important for high transcriptional activity, the CAA triplets thought to indicate the region of transcription initiation and the poly(T) stretches thought to act as transcription terminators. Bases which vary between isoacceptors are highlighted, as are anticodons.


Anticodon CAU

5' flanks
Met-i(CAT)_1 Met-i(CAT)_7 Met-i(CAT)_9
GTTATACATTACCATGATAAATATATACCTAATTAACATTACAACAACAA
Met-i(CAT)_10
AAGGTTTATTTAACGGTTATATAAAACTTGGATATAAAACATTCAAAACA
Met-i(CAT)_12
TGTATATTTAATAATCTTTATAAATTTAAAATTATTATTTAAATCAAAAA
Met-i(CAT)_13
TCCCTTTTGTATGTATTTATATTTTATAAATAAGAAAAAAGTATCAACAA
Met-i(CAT)_2 Met-i(CAT)_4
TACCTAAAGTAAATGTATACATATCATATTTGTAGCTTAGTTAACATCAA
Met-i(CAT)_3
TATCTTTCAATCTCTTTTATATATATAAAGAATGACTCATCTATCAAAAA
Met-i(CAT)_5
TTTGACAATGGTAATAACTAAAGGTATCATGTATAATATATTAACAAAAA
Met-i(CAT)_6
AAGGTTTATTTAACGCTTATATAAAACTTGGATATAAAACATTCAAAACA
Met-i(CAT)_8
CGGATTTATTATTTGGTTAATTAAATGATTTGTATGATGATTAACAAAAA
             A
           A-T
           T-A
           C-G
           A-T
           G-C
           A-T
           G-C     AA
   GA     T   GGTCC  A
  C  CGCGG    |||||  G
  G  |||*     CCAGG  C
  G  GCGT     C    AT
   AA    G   A T
          G-C GG
          T-A  
          G-C   
          G-C    
          G-C     
         C   A     
         C   A      
          CAT        

3' flanks
Met-i(CAT)_1 Met-i(CAT)_7 Met-i(CAT)_9
GTATTGTTACTCTTTTTTTTTTTTT
Met-i(CAT)_10
TAAGTTTTTGATTATTTTTTTCCTT
Met-i(CAT)_12
TAATCTTTTTTTTTTGGCAGATATA
Met-i(CAT)_13
TGTTTTTTCTAATTTTACCGTATTT
Met-i(CAT)_2 Met-i(CAT)_4
AAATGTTTCGTGTTTTTTTGTTTTG
Met-i(CAT)_3
ATCGAGTTTTTTTTTTCCCTATTTA
Met-i(CAT)_5
GAGTTTTAAATTTCTTTTTTTTTCT
Met-i(CAT)_6
TAAGTTTTTGATTATTTTTTTCCAT
Met-i(CAT)_8
ATTTTTTTTTTTTTTTTTTTTTTTT

Observations:

unusual T loop sequence: GATC instead of GTTC

Variants:

Met-i(CAT)_12
G5->A  C11->T  G27->A  C49->A  G65->T  C68->T
Met-i(CAT)_13
T2->G  A71->C


References

Akama K, et al.
Nucleotide sequence of a methionine initiator tRNA gene of Arabidopsis thaliana.
Plant Mol Biol. 1989 Nov;13(5):599-600.


tRNA & aminoacyl-tRNA synthetase table | taaRSAt home page

Last updated December 12, 1999; Ian Small