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The NTP phosphate donor in kinase reactions: Is ATP a monopolist?

100%

Shugar D.

tom 43

nr 1

This brief overview describes some of the properties of various cellular phosphotransferase systems, with particular emphasis on nucleoside 5'-triphosphate (NTP)- dependent protein kinases and nucleoside kinases, for which it is widely and implicitly assumed that ATP is the intracellular phosphate donor. Numerous examples are presented, based on the in vitro properties of these enzymes, to show that ATP is not the only, or frequently not even the major, phosphate donor, and that this is probably reflected in vivo. It is pointed out that in vitro studies of donor and acceptor specificities of kinases must take account of the intracellular concentrations of nucleoside 5-triphosphates, a problem also relevant to the design of nucleoside analogues as chemotherapeutic agents. Attention is also drawn to NTP analogues as substrates/ inhibitors of protein kinases, and to several examples of low-molecular mass non- peptide substrates of these enzymes.

Studies on pyrimidine nucleotidases-phosphotransferases from human erythrocyte

100%

Amici A. , Emanuelli M. , Naponelli V. , Raffaelli N. , Ruggieri S. , Saccucci F. , Magni G.

Cellular and Molecular Biology Letters

1999

tom 04

nr 3

Phosphorylation of acyclonucleosides by nucleoside phosphotransferase from higher plants and bacteria

84%

Rutkowski M. , Draminski M.

Acta Biochimica Polonica

1991

tom 38

nr 4

The aac[6']Ib gene in Proteus mirabilis strains resistant to aminoglycosides

84%

Wieczorek P. , Sacha P. , Hauschild T. , Ostas A. , Klosowska W. , Ratajczak J. , Tryniszewska E.

2008

tom 46

nr 4

531-533

Transformation of diploid potato with an Agrobacterium tumefaciens binary vector system: I. Methodological approach

67%

Borkowska M. , Kleczkowski K. , Klos B. , Jakubiec J. , Wielgat B.

1994

tom 16

nr 3