how a bond of atp breaks and from where it gains that energy to break that bond?

Question

anonymous · Answer

ATP bond is broke by hydrolysis. Usually, enzyme helps to lower the activation energy of the  process. For example, kinase enzyme catalyse the transfer of phosphate group of ATP to other substrate. P-type ATPase involves in the active transports of ions across membrane.

kayne · Answer

I'd like to add something to what @yukitou has said.  ATP stands for adenosine triphosphate. As the name suggests, it has three phosphate groups.  These phosphate groups are high-energy molecules and when hydrolysed produces a high level of energy is generated from the broken phosphodiester bonds.  It should be noted that the 3rd and 2nd phosphodiester bonds (yielding adenosine diphosphate(ADP) and adenosine monophosphate(AMP) respectively) hold the highest and same level of energy.  Also, ATP is readily hydrolysed as the phosphate groups are good leaving groups due to the negative charges on the oxygen which cause repulsion between the phosphate molecules.

See the attached file for the structure of ATP and breaking down of a phosphodiester bond..

kayne · Answer

Sorry.. @HGS.. the picture is not showing the breaking down of ATP but rather the synthesis of ATP.