Skip to main content

Table 1 The positions of invariant amino acids in the translation initiation region

From: Mapping codon usage of the translation initiation region in porcine reproductive and respiratory syndrome virus genome

ORF Serotype The position of amino acid conservation in the translation initiation region
ORF1a US The 2nd to 17th, 19th to 34th, 36th to 41st, 43rd to 50th
  EU The 3rd, 6th to 13th, 15th to 18th, 20th to 23rd, 25th to 28th, 30th to 32nd, 34th, 35th, 39th to 41st, 44th, 46th, 48th to 50th
ORF2 US The 2nd to 4th, 6th, 8th, 11th to 13th, 15th to 22nd, 25th to 31st, 33rd to 41st, 43rd to 44th, 46th to 49th
  EU The 2nd to 4th, 7th, 12th to 13th, 15th, 18th, 20th, 22nd, 24th to 27th, 32nd to 37th, 40th, 41st, 43rd to 49th
ORF3 US The 4th, 5th, 7th, 9th to 12th, 14th, 16th to 19th, 21st, 22nd, 24th to 26th, 29th, 31st, 33rd to 47th, 49th, 50th
  EU The 2nd, 4th, 15th, 18th, 20th, 24th to 26th, 28th, 31st to 50th
ORF4 US The 2nd, 6th to 8th, 10th to 12th, 14th, 17th to 31st, 33rd, 34th, 36th to 41st, 44th,
46th to 50th
  EU The 3rd, 4th, 6th, 7th, 9th, 12th, 13th, 17th to 32nd, 34th, 36th to 39th, 41st, 42nd, 44th, 46th to 48th, 50th
ORF5 US The 2nd, 6th to 8th, 10th, 12th, 14th, 15th, 18th to 23th, 26th to 28th, 30th to 34th, 36th, 39th to 46th, 48th to 50th
  EU The 3rd, 4th, 6th, 7th, 14th to 16th, 18th, 19th, 21st, 24th, 26th to 28th, 30th to 34th, 36th, 39th to 46th, 48th to 50th
ORF6 US The 2nd to 9th, 11th to 15th, 17th to 50th
  EU The 2nd, 4th, 5th, 7th, 8th, 15th to 22nd, 24th to 50th
ORF7 US The 2nd to 10th, 12th to 14th, 16th to 45th, 47th, 50th
  EU The 2nd, 3rd, 5th, 6th, 8th to 10th, 12th, 15th to 21st, 23rd to 28th, 30th, 31st, 33rd, 35th to 38th, 42nd to 50th