Figure 3

Alignment of CagA sequences from patients with gastric disorders. CagA amino acid sequences obtained from nine patients with chronic gastritis (G), two with peptic ulcer (GU) and nine with gastric cancer (C) are aligned with the CagA sequence from H. pylori reference strain 43526. The sample number is followed by the histological diagnosis. The EPIYA amino acids are shown in blue. The red lines highlight each EPIYA pattern, and the green lines underline the CRPIA motifs. Alanine-to-threonine changes (EPIYT) in EPIYA-B are shown in orange. The ESIYT sequence that corresponds to the proline-to-serine and alanine-to-serine changes in EPIYA-B is shown in pink. An AM-I strain was detected in one patient with chronic gastritis (MX44-G [GenBank: KF800906.1]. The sample MX16-C [GenBank: KF800911.1] from patient with gastric cancer contain a CRPIA motif in the N-terminus of its second EPIYA-B. This sequence is unique in that it contain an extra EPIYA-B motif and an extra CRPIA motif, making it difficult to align it with CagA from strain 43526. GenBank accession numbers of each strain in this figure:MX02A-C [KF800917.1], MX66-G [KF800903.1], MX21-C[KF800909.1], MX22-C[KF800908.1 ], MX51-G[KF800904.1], MX652-G[KF800898.1], MX05-C[ KF800915.1], MX12-C[KF800912.1], MX204-GU[KF800902.1], MX637-G[ KF800899.1], MX006-G[KF800914.1], MX03-C[ KF800916.1], MX08T-C[KF800913.1], MX44-G[KF800906.1], MX327-GU[KF800901.1], MX43-G[KF800907.1], MX45-G[KF800905.1], MX392-G[KF800900.1], MX17-C[KF800910.1], MX16-C[KF800911.1].