| Entry |
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| Name |
guanosine-triphosphate guanylyltransferase;
diguanosine tetraphosphate synthetase;
GTP-GTP guanylyltransferase;
Gp4G synthetase;
guanosine triphosphate-guanose triphosphate guanylyltransferase
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| Class |
Transferases;
Transferring phosphorus-containing groups;
Nucleotidyltransferases
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| Sysname |
GTP:GTP guanylyltransferase
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| Reaction(IUBMB) |
2 GTP = diphosphate + P1,P4-bis(5'-guanosyl) tetraphosphate [RN: R00012]
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| Reaction(KEGG) |
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| Substrate |
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| Product |
diphosphate [CPD: C00013];
P1,P4-bis(5'-guanosyl) tetraphosphate [CPD: C01261]
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| Comment |
Also acts, more slowly, on GDP to form P1,P3-bis(5'-guanosyl) triphosphate.
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| History |
EC 2.7.7.45 created 1976
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| Reference |
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| Authors |
Warner AH, Beers PC, Huang FL. |
|---|
| Title |
Biosynthesis of the diguanosine nucleotides. I. Purification and properties of an enzyme from yolk platelets of brine shrimp embryos. |
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| Journal |
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| Other DBs |
| ExplorEnz - The Enzyme Database: | 2.7.7.45 |
| ExPASy - ENZYME nomenclature database: | 2.7.7.45 |
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