GTP diphosphokinase activity (Q21117010)
Catalysis of the reaction: ATP + GTP = AMP + guanosine 3'-diphosphate 5'-triphosphate.
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other details
aliases guanosine 3',5'-polyphosphate synthase activity
 GO:0008728
 guanosine pentaphosphate synthetase activity
 ppGpp synthetase I activity
 guanosine 5',3'-polyphosphate synthetase activity
 ATP:GTP 3'-diphosphotransferase activity
 GTP pyrophosphokinase activity
 ATP-GTP 3'-diphosphotransferase activity
description Catalysis of the reaction: ATP + GTP = AMP + guanosine 3'-diphosphate 5'-triphosphate.

External Links
(P686) GO:0008728