Chlorophyll b Degradation (Arabidopsis thaliana)

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1pheophorbide a(pheide a)Chlorophyll b reductase (CBR)EC: b(chlb)Mg-dechelatase(MDC)pheophytin a(phein a)pheophytinase(PPH) EC: a7-Hydroxymethylchlorophyll a(HMChl a)7-hydroxymethyl chlorophyll a reductase(HCAR) EC: b(pheide b)pheophytin b(phein b)7-Hydroxymethyl pheophytin a(HMPhein a)7-Hydroxymethyl pheophorbide a(HMPheide a)


In plants the light harvesting complex around the photosystems contain chlorophyll a and b pigment molecules. both Chlorophyll and b helps in photosynthesis by absorbing light energy. Chlorophyll b is degraded into chlorophyll a and ultimately into phenophytins and pheophorbides.

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Ontology Terms



  1. Shimoda Y, Ito H, Tanaka A; ''Conversion of chlorophyll b to chlorophyll a precedes magnesium dechelation for protection against necrosis in Arabidopsis.''; Plant J, 2012 PubMed Europe PMC Scholia


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107042view14:11, 17 September 2019MaintBotChEBI identifier normalization
93085view11:49, 28 July 2017DeSlChanged pubchem substance ID to ChEBI ID.
71865view21:23, 18 October 2013EgonwFixed a data source.
71449view19:14, 17 October 2013MaintBotAutomated update of data sources
70158view00:12, 13 July 2013AlexanderPicoModified title
68451view19:35, 5 July 2013MaintBotUpdated to 2013 gpml schema
49153view22:37, 6 July 2012PjaiswalModified categories
49152view22:37, 6 July 2012PjaiswalOntology Term : 'plant cell' added !
49151view22:36, 6 July 2012PjaiswalOntology Term : 'porphyrin and chlorophyll metabolic pathway' added !
49150view22:36, 6 July 2012PjaiswalModified description
49149view22:29, 6 July 2012Pjaiswaladded pathway and reactants
49148view22:09, 6 July 2012PjaiswalPeriodical save, work in progress
49147view21:58, 6 July 2012PjaiswalNew pathway

External references


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NameTypeDatabase referenceComment
7-Hydroxymethyl pheophorbide a (HMPheide a)Metabolite
7-Hydroxymethyl pheophytin a (HMPhein a)Metabolite
7-Hydroxymethylchlorophyll a (HMChl a)Metabolite96024368 (PubChem)
7-hydroxymethyl chlorophyll a reductase (HCAR) EC: (EC Number)
Chlorophyll b reductase (CBR) EC: (EC Number)
Mg-dechelatase (MDC)GeneProduct
chlorophyll aMetabolite18230 (ChEBI)
chlorophyll b (chlb)Metabolite27888 (ChEBI)
pheophorbide a (pheide a)Metabolite38257 (ChEBI)
pheophorbide b (pheide b)Metabolite38258 (ChEBI)
pheophytin a (phein a)Metabolite44898 (ChEBI)
pheophytin b (phein b)Metabolite38256 (ChEBI)
pheophytinase (PPH) EC: (EC Number)

Annotated Interactions

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