ID   2.7.7.53
DE   ATP adenylyltransferase.
AN   AP-4-A phosphorylase.
AN   bis(5'-nucleosyl)-tetraphosphate phosphorylase (NDP-forming).
AN   diadenosine 5',5'''-P(1),P(4)-tetraphosphate phosphorylase.
AN   diadenosinetetraphosphate alphabeta-phosphorylase.
CA   ADP + ATP + H(+) = P(1),P(4)-bis(5'-adenosyl) tetraphosphate + phosphate.
CC   -!- GTP and adenosine tetraphosphate can also act as adenylyl acceptors.
DR   P9WMK8, AP4A_MYCTO ;  P9WMK9, AP4A_MYCTU ;  P16550, APA1_YEAST ;
DR   P49348, APA2_KLULA ;  P22108, APA2_YEAST ;
//