aroF-I (PP_2324) encodes a predicted class-I 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase (DAHP synthase; EC 2.5.1.54) in Pseudomonas putida KT2440. DAHP synthase catalyzes the aldol-like condensation of phosphoenolpyruvate and D-erythrose 4-phosphate to form DAHP, the first committed step of the shikimate pathway. That pathway produces chorismate, the branch-point precursor for phenylalanine, tyrosine, tryptophan, folate, ubiquinone, and other aromatic metabolites. KT2440 has multiple DAHP synthase paralogs, including aroH, aroF-I, and aroF-II, whose feedback regulation and relative in vivo flux contributions remain unresolved.
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
|
GO:0003849
3-deoxy-7-phosphoheptulonate synthase activity
|
IEA
GO_REF:0000120 |
ACCEPT |
Summary: aroF-I is a class-I DAHP synthase family protein with EC 2.5.1.54 annotation, matching condensation of phosphoenolpyruvate and erythrose 4-phosphate to DAHP.
Reason: This is the core molecular function and is supported by PIRNR/Pfam/InterPro family evidence. Direct biochemical data for this specific paralog were not found in this first pass.
|
|
GO:0005737
cytoplasm
|
IEA
GO_REF:0000118 |
ACCEPT |
Summary: DAHP synthase is a soluble central-metabolism enzyme acting on cytoplasmic substrates.
Reason: Cytoplasmic localization is appropriate for a bacterial shikimate-pathway enzyme and no secretion or membrane features are indicated.
|
|
GO:0009073
aromatic amino acid biosynthetic process
|
IEA
GO_REF:0000120 |
ACCEPT |
Summary: DAHP synthase initiates the shikimate pathway that supplies chorismate for all three aromatic amino acid branches.
Reason: Correct biological process for this enzyme class. The specific aromatic amino-acid branch affected by this paralog's feedback regulation is not resolved.
|
|
GO:0042802
identical protein binding
|
IEA
GO_REF:0000117 |
MARK AS OVER ANNOTATED |
Summary: Class-I DAHP synthases are commonly oligomeric, but identical protein binding is a generic structural interaction term rather than the informative biochemical function.
Reason: The annotation adds little beyond the catalytic DAHP synthase activity and appears electronically propagated. Generic protein-binding-style terms are not useful as core molecular functions here.
|
|
GO:0009423
chorismate biosynthetic process
|
IEA
GO_REF:0000041 |
ACCEPT |
Summary: DAHP synthase catalyzes the entry reaction into the shikimate pathway, upstream of chorismate.
Reason: This is the most specific pathway-process annotation available in GOA for the anabolic role of aroF-I.
|
Q: What are the feedback-inhibition properties and relative in vivo contributions of aroH, aroF-I, and aroF-II in KT2440 aromatic amino acid biosynthesis?
This report is retrieval-only and is generated directly from Asta results.
search_papers_by_relevance with snippet_search.id: Q88KG6
gene_symbol: aroF-I
product_type: PROTEIN
status: DRAFT
taxon:
id: NCBITaxon:160488
label: Pseudomonas putida (strain ATCC 47054 / DSM 6125 / CFBP 8728 / NCIMB 11950 / KT2440)
description: aroF-I (PP_2324) encodes a predicted class-I 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase (DAHP synthase; EC 2.5.1.54) in Pseudomonas putida KT2440. DAHP synthase catalyzes the aldol-like condensation of phosphoenolpyruvate and D-erythrose 4-phosphate to form DAHP, the first committed step of the shikimate pathway. That pathway produces chorismate, the branch-point precursor for phenylalanine, tyrosine, tryptophan, folate, ubiquinone, and other aromatic metabolites. KT2440 has multiple DAHP synthase paralogs, including aroH, aroF-I, and aroF-II, whose feedback regulation and relative in vivo flux contributions remain unresolved.
existing_annotations:
- term:
id: GO:0003849
label: 3-deoxy-7-phosphoheptulonate synthase activity
evidence_type: IEA
original_reference_id: GO_REF:0000120
qualifier: enables
review:
summary: aroF-I is a class-I DAHP synthase family protein with EC 2.5.1.54 annotation, matching condensation of phosphoenolpyruvate and erythrose 4-phosphate to DAHP.
action: ACCEPT
reason: This is the core molecular function and is supported by PIRNR/Pfam/InterPro family evidence. Direct biochemical data for this specific paralog were not found in this first pass.
- term:
id: GO:0005737
label: cytoplasm
evidence_type: IEA
original_reference_id: GO_REF:0000118
qualifier: located_in
review:
summary: DAHP synthase is a soluble central-metabolism enzyme acting on cytoplasmic substrates.
action: ACCEPT
reason: Cytoplasmic localization is appropriate for a bacterial shikimate-pathway enzyme and no secretion or membrane features are indicated.
- term:
id: GO:0009073
label: aromatic amino acid biosynthetic process
evidence_type: IEA
original_reference_id: GO_REF:0000120
qualifier: involved_in
review:
summary: DAHP synthase initiates the shikimate pathway that supplies chorismate for all three aromatic amino acid branches.
action: ACCEPT
reason: Correct biological process for this enzyme class. The specific aromatic amino-acid branch affected by this paralog's feedback regulation is not resolved.
- term:
id: GO:0042802
label: identical protein binding
evidence_type: IEA
original_reference_id: GO_REF:0000117
qualifier: enables
review:
summary: Class-I DAHP synthases are commonly oligomeric, but identical protein binding is a generic structural interaction term rather than the informative biochemical function.
action: MARK_AS_OVER_ANNOTATED
reason: The annotation adds little beyond the catalytic DAHP synthase activity and appears electronically propagated. Generic protein-binding-style terms are not useful as core molecular functions here.
- term:
id: GO:0009423
label: chorismate biosynthetic process
evidence_type: IEA
original_reference_id: GO_REF:0000041
qualifier: involved_in
review:
summary: DAHP synthase catalyzes the entry reaction into the shikimate pathway, upstream of chorismate.
action: ACCEPT
reason: This is the most specific pathway-process annotation available in GOA for the anabolic role of aroF-I.
core_functions:
- description: Predicted class-I DAHP synthase catalyzing condensation of phosphoenolpyruvate and D-erythrose 4-phosphate to DAHP, the entry reaction of the shikimate pathway leading to chorismate.
molecular_function:
id: GO:0003849
label: 3-deoxy-7-phosphoheptulonate synthase activity
directly_involved_in:
- id: GO:0009423
label: chorismate biosynthetic process
locations:
- id: GO:0005737
label: cytoplasm
supported_by:
- reference_id: GO_REF:0000120
- reference_id: PMID:41029715
references:
- id: GO_REF:0000041
title: Gene Ontology annotation based on UniPathway vocabulary mapping
findings: []
- id: GO_REF:0000117
title: Electronic Gene Ontology annotations created by ARBA machine learning models
findings: []
- id: GO_REF:0000118
title: TreeGrafter-generated GO annotations
findings: []
- id: GO_REF:0000120
title: Combined Automated Annotation using Multiple IEA Methods
findings: []
- id: PMID:41029715
title: Combinatorial engineering pinpoints shikimate pathway bottlenecks in para-aminobenzoic acid production in Pseudomonas putida.
findings: []
- id: PMID:12534463
title: Complete genome sequence and comparative analysis of the metabolically versatile Pseudomonas putida KT2440.
findings: []
suggested_questions:
- question: What are the feedback-inhibition properties and relative in vivo contributions of aroH, aroF-I, and aroF-II in KT2440 aromatic amino acid biosynthesis?