nitrite reductase (NIR, EC 1.7.7.1)
First-pass extracted concept
nitrite reductase
Candidate: toolkit item1 source documents10 linked claims
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Aliases
EC 1.7.7.1, NIR
Evidence Snippets
Supporting Sources
Linked Claims
Phytochrome and nitrate control nitrite reductase gene expression differently in different plant species, while dependence on the plastidic factor appears to be the same in all cases studied so far.
Quoted textsource-backed
It is obvious that in different plants phytochrome and nitrate control NIR gene expression differently. Only the dependence on the plastidic factor appears to be the same in all cases studied so far.
In mustard seedling cotyledons, actual enzyme synthesis of both nitrate reductase and nitrite reductase is controlled by nitrate.
Quoted textsource-backed
However, in both cases actual enzyme synthesis was controlled by nitrate
In mustard seedling cotyledons, nitrate reductase and nitrite reductase share the same dependence on positive control by the plastidic factor.
Quoted textsource-backed
the dependence on positive control by the plastidic factor was the same.
In mustard seedling cotyledons, nitrite reductase transcript level is controlled by light alone and nitrate is ineffective.
Quoted textsource-backed
in the case of NIR the transcript level was controlled by light alone, with nitrate being ineffective.
In spinach seedling cotyledons, light strongly affects nitrite reductase synthesis while nitrate affects transcript level.
Quoted textsource-backed
The strong action of light on NIR synthesis was multiplicatively superimposed on the action of nitrate, consistent with the conclusion that nitrate affects the transcript level while light controls enzyme synthesis.
In spinach seedling cotyledons, nitrite reductase transcript level is unaffected by light and determined by nitrate.
Quoted textsource-backed
In spinach ( Spinacia oleracea L.) seedling cotyledons the NIR transcript level was unaffected by light but determined by nitrate.
In tobacco seedlings, light has no effect on nitrite reductase synthesis in the absence of nitrate but strongly affects protein synthesis in the presence of nitrate.
Quoted textsource-backed
There was no effect of light on NIR synthesis in the absence of nitrate while a strong action of light on protein synthesis was observed in the presence of nitrate.
In tobacco seedlings, nitrite reductase transcript level is determined by a synergistic action between nitrate and light.
Quoted textsource-backed
In tobacco ( Nicotiana tabacum L., cv. Coker 176) seedlings the NIR transcript level was determined by a synergistic action between nitrate and light
In tobacco, the specific effect of blue light on nitrite reductase appearance is not seen at the transcript level.
Quoted textsource-backed
The specific effect of blue light on enzyme appearance, i.e. an effect which cannot be attributed to phytochrome, was not seen at the transcript level.
Nitrite reductase is a nuclear-encoded plastidic protein.
Quoted textsource-backed
While both enzymes are nuclear‐encoded, NR is a cytosolic and NIR a plastidic protein.