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2008 | 55 | 1 |

Tytuł artykułu

A diadenosine 5',5''-P1P4 tetraphosphate [Ap4A] hydrolase from Arabidopsis thaliana that is activated preferentially by Mn2plus ions

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Asymmetrical diadenosine 5',5''-P 1P 4 tetraphosphate (Ap4A) hydrolases are key enzymes controlling the in vivo concentration of Ap4A - an important signaling molecule involved in regulation of DNA replication and repair, signaling in stress response and apoptosis. Sequence homologies indicate that the genome of the model plant Arabidopsis thaliana contains at least three open reading frames encoding presumptive Ap4A hydrolases: At1g30110, At3g10620, and At5g06340. In this work we present efficient overexpression and detailed biochemical characteristics of the AtNUDX25 protein encoded by the At1g30110 gene. Aided by the determination of the binding constants of Mn(Ap4A) and Mg(Ap4A) complexes using isothermal titration calorimetry (ITC) we show that AtNUDX25 preferentially hydrolyzes Ap4A in the form of a Mn 2+ complex.

Wydawca

-

Rocznik

Tom

55

Numer

1

Opis fizyczny

p.151-160,fig.,ref.

Twórcy

autor
  • Polish Academy of Sciences, A.Pawinskiego 5A, 02-106 Warsaw, Poland
autor

Bibliografia

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Typ dokumentu

Bibliografia

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