FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene Group: PHENOLOXIDASES
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General Information
Name
PHENOLOXIDASES
Species
D. melanogaster
Symbol
PO
FlyBase ID
FBgg0000723
Date last reviewed
2017-04-04
Number of members
4
Description
Description
Phenoloxidases (POs) are innate immune proteins involved in the melanization process. POs catalyze the oxidation of phenols to quinones, which subsequently polymerize into melanin at the site of infection and around parasites. POs are synthesized as an inactive zymogen prophenoloxidase (PPO), which are cleaved to generate active POs. (Adapted from FBrf0224867 and FBrf0229770).
Notes on Group

A good summary of the role of PHENOLOXIDASES (POs) in melanin biosynthesis pathway can be found in Figure 2 of FBrf0215359.

Source Material
The PHENOLOXIDASES Gene Group has been compiled using the following publication(s): Dudzic et al., 2015, Chen et al., 2012, Li et al., 2012, Liu et al., 2012, and Tang, 2009 .
Key Gene Ontology (GO) terms
Molecular Function
Cellular Component
Enzymatic activity
Enzyme name (EC)
catechol oxidase (1.10.3.1)
Related Gene Groups
Members (4)
For all members:
GO ribbon stack
 molecular functionbiological processcellular component
External Data
Equivalent Group(s)
Other resource(s)
Synonyms and Secondary IDs
Synonym(s)
PO
PHENOLOXIDASES
Prophenoloxidases
PPOs
Secondary FlyBase ID(s)
References (7)