Everything about Nadph totally explained
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Nicotinamide adenine dinucleotide phosphate (
NADP+, in older notation
TPN) is used in anabolic reactions, such as
lipid and
nucleic acid synthesis, which require NADPH as a
reducing agent.
NADPH is the
reduced form of NADP
+.
In plants
In
chloroplasts, NADP is reduced by
ferredoxin-NADP+ reductase in last step of the electron chain of the
light reactions of
photosynthesis. The NADPH produced is then used as reducing power for the biosynthetic reactions in the
Calvin cycle of photosynthesis.
NADP ions in photosynthesis may be seen as 'dragging' hydrogen ions along with them (in the light-dependent cycles), which are used by the light-independent (Calvin) cycles to produce carbohydrates.
In animals
The oxidative phase of the
pentose phosphate pathway is the major source of NADPH in cells.
NADPH provides the reducing equivalents for biosynthetic reactions and for
oxidation-reduction involved in protection against the toxicity of ROS (
reactive oxygen species).
NADPH is also used for
anabolic pathways, such as lipid synthesis,
cholesterol synthesis and fatty acid chain elongation.
It is the source of reducing equivalents for
cytochrome 450 hydroxylation of
aromatic compounds,
steroids,
alcohols, and
drugs.
Image:NADP-3D-balls.png|Ball-and-stick model of NADP+
Image:NADPH-3D-balls.png|Ball-and-stick model of NADPH
Further Information
Get more info on 'Nadph'.
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