Transferases;
Transferring alkyl or aryl groups, other than methyl groups;
Transferring alkyl or aryl groups, other than methyl groups (only sub-subclass identified to date)
BRITE hierarchy

chlorophyllide-a:phytyl-diphosphate phytyltransferase

chlorophyllide a + phytyl diphosphate = chlorophyll a + diphosphate [RN:R06284]

R06284;
(other) R09067
Reaction

chlorophyllide a [CPD:C02139];
phytyl diphosphate [CPD:C05427]

Requires Mg2+. The enzyme is modified by binding of the first substrate, phytyl diphosphate, before reaction of the modified enzyme with the second substrate, chlorophyllide a, can occur. The reaction also occurs when phytyl diphosphate is replaced by geranylgeranyl diphosphate.

EC 2.5.1.62 created 2003

1  [PMID:12530542]

2  [PMID:9092496]

3  [PMID:7408876]

Hydrolases;
Acting on ester bonds;
Carboxylic-ester hydrolases
BRITE hierarchy

chlorophyll chlorophyllidohydrolase

chlorophyll + H2O = phytol + chlorophyllide

(other) R05618 R09068
Reaction

chlorophyll [CPD:C01793];
H2O [CPD:C00001]

Chlorophyllase has been found in higher plants, diatoms, and in the green algae Chlorella [3]. This enzyme forms part of the chlorophyll degradation pathway and is thought to take part in de-greening processes such as fruit ripening, leaf senescence and flowering, as well as in the turnover and homeostasis of chlorophyll [4]. This enzyme acts preferentially on chlorophyll a but will also accept chlorophyll b and pheophytins as substrates [5]. Ethylene and methyl jasmonate, which are known to accelerate senescence in many species, can enhance the activity of the hormone-inducible form of this enzyme [5].

EC 3.1.1.14 created 1961, modified 2007

1  [PMID:13715233]

2  [PMID:13756631]

3  [PMID:10611389]

4  [PMID:16610227]

5  [PMID:16669755]