IntEnz

EC 1.3.7.12 - Red chlorophyll catabolite reductase

IntEnz Enzyme Nomenclature
EC 1.3.7.12

Names

Reaction

• 24752 [IUBMB]
  2

  oxidized [2Fe-2S]-[ferredoxin]

  oxidized [2Fe-2S]-[ferredoxin]

  GENERIC:10000

  Is ROOT: no
  ROOT compound: GENERIC:9997

  Number of residues: 1

  [2Fe-2S]2+ [2Fe-2S](2+) Name origin: UniProt - CHECKED (C) CHEBI:33737 Formula: Fe2S2 Charge: 2 Position: undefined ChEBI compound status: CHECKED (C)

  +

  primary fluorescent chlorophyll catabolite

  primary fluorescent chlorophyll catabolite

  Name origin: UniProt - CHECKED (C)

  CHEBI:77670

  Formula: C35H39N4O7
  Charge: -1

  ChEBI compound status: CHECKED (C)

  

  =

  3

  H⁺

  H(+)

  Name origin: UniProt - CHECKED (C)

  CHEBI:15378

  Formula: H
  Charge: 1

  ChEBI compound status: CHECKED (C)

  

  +

  red chlorophyll catabolite

  red chlorophyll catabolite

  Name origin: UniProt - CHECKED (C)

  CHEBI:58716

  Formula: C35H36N4O7
  Charge: -2

  ChEBI compound status: CHECKED (C)

  

  +

  2

  reduced [2Fe-2S]-[ferredoxin]

  reduced [2Fe-2S]-[ferredoxin]

  GENERIC:10001

  Is ROOT: no
  ROOT compound: GENERIC:9997

  Number of residues: 1

  [2Fe-2S]1+ [2Fe-2S](1+) Name origin: UniProt - CHECKED (C) CHEBI:33738 Formula: Fe2S2 Charge: 1 Position: undefined ChEBI compound status: CHECKED (C)

Comments:

The enzyme participates in chlorophyll degradation, which occurs during leaf senescence and fruit ripening in higher plants. The reaction requires reduced ferredoxin, which is generated from NADPH produced either through the pentose-phosphate pathway or by the action of photosystem I [1,2]. This reaction takes place while red chlorophyll catabolite is still bound to EC 1.14.15.17, pheophorbide a oxygenase [3]. Depending on the plant species used as the source of enzyme, one of two possible C-1 epimers of primary fluorescent chlorophyll catabolite (pFCC), pFCC-1 or pFCC-2, is normally formed, with all genera or species within a family producing the same isomer [3,4]. After modification and export, pFCCs are eventually imported into the vacuole, where the acidic environment causes their non-enzymic conversion into colourless breakdown products called non-fluorescent chlorophyll catabolites (NCCs) [2].

Links to other databases

References

1. Rodoni, S., Mühlecker, W., Anderl, M., Kräutler, B., Moser, D., Thomas, H., Matile, P. and Hörtensteiner, S.
   Chlorophyll breakdown in senescent chloroplasts. Cleavage of pheophorbide a in two enzymic steps.
   Plant Physiol. 115: 669-676 (1997). [PMID: 12223835]
2. Wüthrich, K.L., Bovet, L., Hunziker, P.E., Donnison, I.S. and Hörtensteiner, S.
   Molecular cloning, functional expression and characterisation of RCC reductase involved in chlorophyll catabolism.
   Plant J. 21: 189-198 (2000). [PMID: 10743659]
3. Pružinská, A., Anders, I., Aubry, S., Schenk, N., Tapernoux-Lüthi, E., Müller, T., Kräutler, B. and Hörtensteiner, S.
   In vivo participation of red chlorophyll catabolite reductase in chlorophyll breakdown.
   Plant Cell 19: 369-387 (2007). [PMID: 17237353]
4. Hörtensteiner, S.
   Chlorophyll degradation during senescence.
   Annu. Rev. Plant Biol. 57: 55-77 (2006). [PMID: 16669755]
5. Rodoni, S., Vicentini, F., Schellenberg, M., Matile, P. and Hörtensteiner, S.
   Partial purification and characterization of red chlorophyll catabolite reductase, a stroma protein involved in chlorophyll Breakdown.
   Plant Physiol. 115: 677-682 (1997). [PMID: 12223836]

[EC 1.3.7.12 created 2007 as EC 1.3.1.80, transferred 2016 to EC 1.3.7.12]