GAPES1 (GAmmaproteobacterial PEriplasmic Sensor) domain is a periplasmic sensor domain found in diguanylate cyclases and methyl-accepting chemotaxis proteins, including the diguanylate cyclase DgcJ (YeaJ) that regulates biofilm formation and motility in Escherichia coli.
Jiyao W et al.(2023). "The conserved domain database in 2023.",