ID 3.6.1.17 DE Bis(5'-nucleosyl)-tetraphosphatase (asymmetrical). AN Ap(4)A hydrolase. AN Ap(4)Aase. AN Ap4A hydrolase. AN Ap4Aase. AN Bis(5'-adenosyl)-tetraphosphatase. AN Bis(5'-guanosyl)-tetraphosphatase. AN Diadenosine 5',5'''-P(1),P(4)-tetraphosphate asymmetrical hydrolase. AN Diadenosinetetraphosphatase (asymmetrical). AN Diguanosinetetraphosphatase (asymmetrical). AN Dinucleosidetetraphosphatase (asymmetrical). CA P(1),P(4)-bis(5'-guanosyl) tetraphosphate + H(2)O = GTP + GMP. CC -!- Also acts on bis(5'-xanthosyl)-tetraphosphate and, more slowly, CC on bis(5'-adenosyl)-tetraphosphate and bis(5'-uridyl)-tetraphosphate CC (cf. EC 3.6.1.41). PR PROSITE; PDOC00694; PR PROSITE; PDOC00695; DR Q29RJ1, AP4A_BOVIN ; P50583, AP4A_HUMAN ; P56380, AP4A_MOUSE ; DR P50584, AP4A_PIG ; Q6PEC0, AP4A_RAT ; P49776, APH1_SCHPO ; DR Q9C6Z2, NUD25_ARATH; Q9K907, PRPE_ALKHC ; B7GLK2, PRPE_ANOFW ; DR C3P3Q5, PRPE_BACAA ; C3LBR5, PRPE_BACAC ; A0RB32, PRPE_BACAH ; DR Q81TQ0, PRPE_BACAN ; B7JEP5, PRPE_BACC0 ; Q73BU4, PRPE_BACC1 ; DR B7ILE8, PRPE_BACC2 ; C1ELB5, PRPE_BACC3 ; B7HGW3, PRPE_BACC4 ; DR B7I0B6, PRPE_BACC7 ; A7GM94, PRPE_BACCN ; B9IU03, PRPE_BACCQ ; DR Q81GJ7, PRPE_BACCR ; Q63EG2, PRPE_BACCZ ; Q6HLX9, PRPE_BACHK ; DR Q65LA0, PRPE_BACLD ; A9VJS5, PRPE_BACMK ; O31614, PRPE_BACSU ; DR A7Z3F2, PRPE_BACVZ ; Q5L1R3, PRPE_GEOKA ; C5D7A6, PRPE_GEOSW ; DR A4IL88, PRPE_GEOTN ; Q8ERS7, PRPE_OCEIH ; //