Identification of chemoreceptor proteins for amino acids involved in host plant infection in Pseudomonas syringae pv. tabaci 6605

•Five dCache_1 type MCPs were identified in Pseudomonas syringae pv. tabaci.•Chemotaxis toward amino acids via PscB and PscC2 is required for full virulence.•Chemoreceptor proteins also involved in non-chemotactic cellular functions.•Mutation of pscC1 caused defects of motility, chemotactic response, and virulence.