Lipid A 4'-kinase Tetraacyldisaccharide 4'-kinase lpxK Smed_0426 MVSEAPPFWWTKADWRAYALWPFSWLYGRIAGMRMDRARRATSAVPLICIGNFTVGGAGKTPTAIAIARAAKARGLKPAFLSRGYGGSLDVTTLVDPEHHRARDVGDEPLLLAREALTVICRRRVDGARKLAAEGADIIIMDDGFQSARLVFDFALIVVDSGRGIGNGHLVPSGPVRAPIGNQLRHATALLKLGHGSAADPVVRRASRAGKPVYVAETVRIDEGSLVGVKVLAWAGIADTEKFFKTVRETGAIIEETRSFPDHHHFSEDEIADLIDRATSRGYTLVTTAKDIVRLEPGHGRAGELAAKSRVIEIEVRFDDPAAPGKIIDAALASARARRLREHKSG LPXK_SINMW Transfers the gamma-phosphate of ATP to the 4'-position of a tetraacyldisaccharide 1-phosphate intermediate (termed DS-1- P) to form tetraacyldisaccharide 1,4'-bis-phosphate (lipid IVA) (By similarity). 346