Part of the ESX-1 / type VII specialized secretion system (T7SS), which exports several proteins including EsxA and EsxB. EccA1 exhibits ATPase activity and may provide energy for the export of ESX-1 substrates (By similarity). Part of the ESX-1 / type VII secretion system (T7SS), which is composed of cytosolic and membrane components (By similarity). Belongs to the CbxX/CfxQ family.