Adenosine monophosphate
Adenosine monophosphate, also known as AMP, is the product of adenosine condensation with a single phosphate ion:
AMP can be produced during ATP synthesis by the enzyme adenylate kinase by combining two ADP molecules:
- 2 ADP → ATP + AMP
Or AMP may be produced by the hydrolysis of one high energy phosphate bond of ADP:
- ADP → AMP + Pi
AMP can also be formed by hydrolysis of ATP into AMP and pyrophosphate:
- ATP → AMP + PPi
When RNA is broken down by living systems, nucleoside monophosphates, including adenosine monophosphate, are formed.
AMP can be regenerated to ATP as follows:
- AMP + ATP → 2 ADP (adenylate kinase in the opposite direction)
- 2 ADP + 2 Pi → 2 ATP (this step is most often performed in aerobes by the ATP synthase during oxidative phosphorylation)
AMP can be converted into IMP by the enzyme myoadenylate deaminase, freeing an ammonia group.
In a catabolic pathway, adenosine monophosphate can be converted to uric acid, which is excreted from the body.