ID 2.7.4.34 DE GDP-polyphosphate phosphotransferase. AN polyphosphate kinase 2. CA [phosphate](n) + GTP = [phosphate](n+1) + GDP. CC -!- Polyphosphate kinase 2, characterized from the bacterium Pseudomonas CC aeruginosa, uses inorganic polyphosphate as a donor to convert GDP to CC GTP. CC -!- The enzyme can also act on ADP (cf. EC 2.7.4.1), but with lower CC activity. CC -!- The enzyme has only a trivial activity in the opposite direction CC (synthesizing polyphosphate from GTP). CC -!- The GTP that is produced is believed to be consumed by EC 2.7.7.13. DR Q9I6Z1, PK21A_PSEAE; //