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Literature summary for 1.3.7.12 extracted from
- Chlorophyll breakdown in oilseed rape (2000), Photosynth. Res., 64, 137-146.
Inhibitors
| Inhibitors | Comment | Organism | Structure |
|---|---|---|---|
| O2 | the enzyme is sensitive to O2 | Arabidopsis thaliana |  |
Localization
| Localization | Comment | Organism | GeneOntology No. | Textmining |
|---|---|---|---|---|
| chloroplast | - |
Arabidopsis thaliana | 9507 | - |
| chloroplast | - |
Brassica napus | 9507 | - |
| gerontoplast | - |
Arabidopsis thaliana | 34400 | - |
| gerontoplast | - |
Brassica napus | 34400 | - |
Natural Substrates/ Products (Substrates)
| Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| red chlorophyll catabolite + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ | Arabidopsis thaliana | - |
primary fluorescent chlorophyll catabolite + 2 oxidized ferredoxin [iron-sulfur] cluster | - |
? | |
| red chlorophyll catabolite + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ | Brassica napus | - |
primary fluorescent chlorophyll catabolite + 2 oxidized ferredoxin [iron-sulfur] cluster | - |
? | |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Arabidopsis thaliana | Q8LDU4 | gene RCCR | - |
| Brassica napus | Q1ELT7 | gene RCCR | - |
Oxidation Stability
| Oxidation Stability | Organism |
|---|---|
| RCCR activity is sensitive to oxygen | Brassica napus |
| the enzyme is sensitive to O2 | Arabidopsis thaliana |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| cotyledon | senescent | Arabidopsis thaliana | - |
| cotyledon | senescent | Brassica napus | - |
| leaf | - |
Arabidopsis thaliana | - |
| seed | - |
Brassica napus | - |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| red chlorophyll catabolite + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ | - |
Arabidopsis thaliana | primary fluorescent chlorophyll catabolite + 2 oxidized ferredoxin [iron-sulfur] cluster | - |
? | |
| red chlorophyll catabolite + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ | - |
Brassica napus | primary fluorescent chlorophyll catabolite + 2 oxidized ferredoxin [iron-sulfur] cluster | - |
? | |
| red chlorophyll catabolite + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ | a red tetrapyrrole | Arabidopsis thaliana | primary fluorescent chlorophyll catabolite + 2 oxidized ferredoxin [iron-sulfur] cluster | two different fluorescent chlorophyll catabolites are formed from red chlorophyll catabolite and identified as primary fluorescent chlorophyll catabolite and its C1 epimer, 1-epi-pFCC | ? | |
| red chlorophyll catabolite + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ | a red tetrapyrrole | Brassica napus | primary fluorescent chlorophyll catabolite + 2 oxidized ferredoxin [iron-sulfur] cluster | two different fluorescent chlorophyll catabolites are formed from red chlorophyll catabolite and identified as primary fluorescent chlorophyll catabolite and its C1 epimer, 1-epi-pFCC | ? | |
Synonyms
| Synonyms | Comment | Organism |
|---|---|---|
| RCCR | - |
Arabidopsis thaliana |
| RCCR | - |
Brassica napus |
Cofactor
| Cofactor | Comment | Organism | Structure |
|---|---|---|---|
| Ferredoxin | - |
Arabidopsis thaliana | |
| Ferredoxin | - |
Brassica napus |
General Information
| General Information | Comment | Organism |
|---|---|---|
| metabolism | in the chlorophyll breakdown pathway, the key reaction which causes loss of green color in leaf senescence is catalyzed in a two-step reaction by pheophorbide an oxygenase and red chlorophyll catabolite reductase. Red chlorophyll catabolite, RCC, the primary product of oxygenolytic Pheide a cleavage by pheophorbide a oxygenase, PaO, is subsequently reduced to primary fluorescent chlorophyll catabolite by red chlorophyll catabolite reductase, RCCR. RCC appears not to be released from PaO, but is directly reduced to pFCC by RCCR, suggesting a close physical contact between the two protein components during catalysis and metabolic channeling of the red intermediate. Both partial reactions require reduced ferredoxin as the source of electrons, whereby ferredoxin is kept in the reduced state either by photosystem I or the pentose phosphate cycle. Since the PaO reaction is accompanied by the incorporation of two oxygen atoms and RCCR activity is sensitive to oxygen, the interaction of PaO and RCCR is a prerequisite for RCCR action | Arabidopsis thaliana |
| metabolism | in the chlorophyll breakdown pathway, the key reaction which causes loss of green color in leaf senescence is catalyzed in a two-step reaction by pheophorbide an oxygenase and red chlorophyll catabolite reductase. Red chlorophyll catabolite, RCC, the primary product of oxygenolytic Pheide a cleavage by pheophorbide a oxygenase, PaO, is subsequently reduced to primary fluorescent chlorophyll catabolite by red chlorophyll catabolite reductase, RCCR. RCC appears not to be released from PaO, but is directly reduced to pFCC by RCCR, suggesting a close physical contact between the two protein components during catalysis and metabolic channeling of the red intermediate. Both partial reactions require reduced ferredoxin as the source of electrons, whereby ferredoxin is kept in the reduced state either by photosystem I or the pentose phosphate cycle. Since the PaO reaction is accompanied by the incorporation of two oxygen atoms and RCCR activity is sensitive to oxygen, the interaction of PaO and RCCR is a prerequisite for RCCR action | Brassica napus |
| physiological function | chlorophyll degradation is an integral part of leaf senescence or fruit ripening | Arabidopsis thaliana |
| physiological function | Chlorophyll degradation is not only an integral part of leaf senescence or fruit ripening, but in several species, such as oilseed rape, also occurs in maturing seeds, significance of the chlorophyll breakdown pathway in respect to chlorophyll degradation during Brassica napus seed development | Brassica napus |
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