Ata (Acinetobacter trimeric autotransporter) has an architecture that consists of a long signal peptide, a repetitive passenger domain that varies in length from strain to strain, and a C-terminal domain of four transmembrane beta stands that forms one third of the pore for autotransporter activity and anchoring in the outer membrane.
Jiyao W et al.(2023). "The conserved domain database in 2023.",