argE

UniProt ID: Q88CJ5
Organism: Pseudomonas putida KT2440
Review Status: COMPLETE
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Gene Description

ArgE (PP_5186) is a predicted M20A-family acetylornithine deacetylase (EC 3.5.1.16) that hydrolyzes N-acetyl-L-ornithine to L-ornithine and acetate in the linear acetylated-ornithine route to L-arginine. Direct KT2440 enzymology is unavailable, and its condition-specific contribution relative to the cyclic ArgJ route is unresolved.

Existing Annotations Review

GO Term Evidence Action Reason
GO:0005737 cytoplasm
IEA
GO_REF:0000044
ACCEPT
Summary: The cytoplasm is the inferred compartment of this soluble biosynthetic enzyme.
Reason: This location is part of the core metabolic role. It is supported by conserved soluble-enzyme biology and ArgE-specific family assignment; the ARBA location line alone is not treated as evidence.
Supporting Evidence:
file:PSEPK/argE/argE-uniprot.txt
DR NCBIfam; TIGR01892; AcOrn-deacetyl; 1.
GO:0006526 L-arginine biosynthetic process
IEA
GO_REF:0000120
ACCEPT
Summary: The enzyme contributes catalytic chemistry to L-arginine biosynthesis.
Reason: The enzyme catalyzes a chemical step of the acetylated-ornithine route to arginine, supported by curated reaction and family classification. The native insertion mutant remains prototrophic (PMID31451546), compatible with metabolic redundancy; this does not demonstrate inactivity or identify its compensator.
Supporting Evidence:
file:PSEPK/argE/argE-uniprot.txt
DR NCBIfam; TIGR01892; AcOrn-deacetyl; 1.
PMID:31451546
It should be noted that these three mutants do not display arginine auxotrophy
GO:0008777 acetylornithine deacetylase activity
IEA
GO_REF:0000120
ACCEPT
Summary: This is the substrate-specific molecular function predicted for ArgE.
Reason: EC 3.5.1.16, HAMAP MF_01108, NCBIfam TIGR01892, and the ArgE M20A subfamily agree. This assignment uses curated catalytic/family evidence; it is not a direct purified-enzyme measurement in KT2440.
Supporting Evidence:
file:PSEPK/argE/argE-uniprot.txt
DR NCBIfam; TIGR01892; AcOrn-deacetyl; 1.
GO:0016787 hydrolase activity
IEA
GO_REF:0000120
MODIFY
Summary: Refine the true broad annotation to the supported substrate-specific function.
Reason: The broad term is biologically compatible with the enzyme; the supported specific activity/process already present in this review is more informative. Breadth alone does not make a claim over-annotated.
Supporting Evidence:
file:PSEPK/argE/argE-uniprot.txt
DR NCBIfam; TIGR01892; AcOrn-deacetyl; 1.
GO:0019213 deacetylase activity
IEA
GO_REF:0000002
MODIFY
Summary: Refine the true broad annotation to the supported substrate-specific function.
Reason: The broad term is biologically compatible with the enzyme; the supported specific activity/process already present in this review is more informative. Breadth alone does not make a claim over-annotated.
Supporting Evidence:
file:PSEPK/argE/argE-uniprot.txt
DR NCBIfam; TIGR01892; AcOrn-deacetyl; 1.

Core Functions

Hydrolyzes N-acetyl-L-ornithine to release L-ornithine in the linear route to L-arginine.

Directly Involved In:
Cellular Locations:
Supporting Evidence:
  • file:PSEPK/argE/argE-uniprot.txt
    DR NCBIfam; TIGR01892; AcOrn-deacetyl; 1.

References

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Suggested Questions for Experts

Q: Under which growth conditions does ArgE-mediated hydrolysis contribute measurably relative to ArgJ-mediated acetyl recycling in KT2440?

Suggested experts: microbial arginine metabolism

Deep Research

OpenScientist

(argE-deep-research-openscientist.md)

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πŸ“š Additional Documentation

Notes

(argE-notes.md)

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