Probably part of the ABC transporter SkfEF involved in the export of the bacteriocin SKF. Probably responsible for energy coupling to the transport system. ATP + H2O + sulfate(out) = ADP + H(+) + phosphate + sulfate(in) ATP + H2O + thiosulfate(out) = ADP + H(+) + phosphate + thiosulfate(in) By Spo0A (PubMed:12817086) and PhoP, during nutrient starvation, especially phosphate starvation. Repressed by AbrB during normal growth when nutrients are plentiful, in association with the transcriptional repressor Abh. When the skfA-skfB-skfC-skfE-skfF-skfG-skfH operon is deleted, increased rate of spore formation; a double operon deletion (sdpA-sdpC plus skfA-skfH) makes spores even faster (PubMed:12817086). Accelerated cannibalism by skf- cells is seen on solid media but not in liquid media. Belongs to the ABC transporter superfamily. SkfA peptide export (TC 3.A.1.128.1) family.