This family consists of K+-transporting ATPase, c chain, KdpC. KdpC forms strong interactions with the KdpA subunit, serving to assemble and stabilise the Kdp complex [1]. It has been suggested that KdpC could be one of the connecting links between the energy providing subunit KdpB and the K+-transporting subunit KdpA [1]. The K+ transport system actively transports K+ ions via ATP hydrolysis.

1: Assembly of the Kdp complex, the multi-subunit K+-transport ATPase of Escherichia coli. Gassel M, Siebers A, Epstein W, Altendorf K; Biochim Biophys Acta 1998;1415:77-84. PMID:9858692