Table 5.
Gene | Primer | Oligonucleotide sequence (5'-3')c | Fragment size (bp) | Annealing temperature | Primer coordinates | Accession number | Reference |
eaea | EAE-1 EAE-2 |
GGAACGGCAGAGGTTAATCTGCAG GGCGCTCATCATAGTCTTTC |
775 | 55°C | 1441–1460 2193–2215 |
AF022236 | 7 |
eae-α1 | EAE-FB EAE-A |
AAAACCGCGGAGATGACTTC CACTCTTCGCATCTTGAGCT |
820 | 60°C | 1909–1928 2709–2728 |
AF022236 | 8 |
eae-α2 | IH2498aF IH2498aR |
AGACCTTAGGTACATTAAGTAAGC TCCTGAGAAGAGGGTAATC |
517 | 60°C | 2099–2122 2597–2615 |
AF530555 | 8 |
eae-β1 | B1A B1B |
ACTTCGCCACTTAATGCCAGC TTGCAGCACCCCATGTTGAAT |
730 | 66°C | 1924–1944 2633–2653 |
AF453441 | 9 |
eae-ξR/β2Bb,e | B2A B2B |
AAGGGGGGAACCCCTGTGTCA ATTTATTCGCAGCCCCCCACG |
604 | 66°C | 2056–2076 2639–2659 |
AF530556 AJ715407 |
9 |
eae-δ/κ/β2Oc | EAE-FB EAE-D |
AAAACCGCGGAGATGACTTC CTTGATACACCCGATGGTAAC |
833 | 60°C | 1909–1928 2721–2741 |
U66102 | 8 |
eae-γ1 | EAE-FB EAE-C1 |
AAAACCGCGGAGATGACTTC AGAACGCTGCTCACTAGATGTC |
804 | 60°C | 1909–1928 2691–2712 |
AF071034 | 8 |
eae-θ/γ2d | EAE-FB EAE-C2 |
AAAACCGCGGAGATGACTTC CTGATATTTTATCAGCTTCA |
808 | 58°C | 1909–1928 2697–2716 |
AF025311 | 8 |
eae-ε1 | EAE-FB LP5 |
AAAACCGCGGAGATGACTTC AGCTCACTCGTAGATGACGGCAAGCG |
722 | 66°C | 1909–1928 2605–2630 |
AF116899 | 8 |
eae-νR/ε2e | EAE-E2F EAE-E2R |
AATACAGAAGTTAAGGCAT ACGACCACTATTCATTTC |
378 | 58°C | 2230–2248 2590–2607 |
AF530554 | 9 |
eae-ζ | Z1 Z2 |
GGTAAGCCGTTATCTGCC ATAGCAAGTGGGGTGAAG |
206 | 62°C | 2062–2079 2250–2267 |
AF449417 | 8 |
eae-η | EAE-FB ETA-B |
AAAACCGCGGAGATGACTTC TAAGCGACCACTATTCGTG |
702 | 60°C | 1899–1918 2582–2600 |
AJ308550 | 9 |
eae-ι1 | EAE-FB IOTA-B |
AAAACCGCGGAGATGACTTC GTCATATTTAACTTTTACACTA |
651 | 55°C | 1909–1928 2538–2559 |
AJ308551 | 9 |
eae-μR/ι2e | Iota2-F Iota2-R |
CTGGTAAAGCGATAGTCAAAC GCGTTTTTGAAGAAACATTTTGC |
936 | 58°C | 1850–1870 2763–2785 |
AF530553 | 9 |
eae-λ | 68.4F 68.4R |
CGGTCAGCCTGTGAAGGGC ATAGATGCCTCTTCCGGTATT |
466 | 64°C | 2061–2079 2506–2526 |
AJ715409 | 8 |
eae-μBf | EAE-FB FV373R |
AAAACCGCGGAGATGACTTC ACTCATCATAATAAGCTTTTTGG |
665 | 60°C | 1909–1928 2541–2563 |
AJ705049 | 9 |
eae-νBf | IH1229aF IH1229aR |
CACAGCTTACAATTGATAACA CTCACTATAAGTCATACGACT |
311 | 60°C | 269–289 559–579 |
AJ705050 | 8 |
eae-ξBf | EAE-FB B49R |
AAAACCGCGGAGATGACTTC ACCACCTTTAGCAGTCAATTTG |
468 | 66°C | 1909–1928 363–384 |
AF116899 AJ705051 | 8 |
aUniversal oligonucleotide primer pair EAE1 and EAE-2 wih homology to the 5'conserved region of eae gene (detects all types of eae variants described at the moment). Primers used to detect the eae gene.
bThe intimin β2 of Blanco et al. (8) is identical to intimin ξ described by Ramachandran et al. (14). In this study our β2 is referred as ξR/β2B.
cThe intimin δ of Adu-Bobie et al. (4) is identical to intimin κ of Zhan et al. (6). The intimin δ of Adu-Bobie et al. (4) was also termed β2 by Oswald et al. (5). Thus, in the present study this intimin is referred as δ/κ/β2O.
dThe intimin θ of Tarr and Whittam (13) is the same as intimin γ2 of Oswald et al. (5).
eIntimins μ, ν, and ξ described by Ramachandran et al. (14) in ruminant E. coli strains. When Ramachandran et al. (14) submitted the nucleotide sequences of μ, ν, and ξ genes these intimin types were designated ι2, ε2 and β2, respectively.
fIntimins μ, ν, and ξ described by Blanco et al. (8, unpublished results).