Gene Ontology annotation through association of InterPro records with GO terms
Annotation inferences using phylogenetic trees
Automatic assignment of GO terms using logical inference, based on on inter-ontology links
Combined Automated Annotation using Multiple IEA Methods
Expression, purification and characterization of recombinant human choline acetyltransferase: phosphorylation of the enzyme regulates catalytic activity.
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Human recombinant 69- and 82-kDa ChAT products retain acetyltransferase activity and differ in localization; phosphorylation by particular kinases alters their activity. The enzyme is the kinase substrate, not itself a protein kinase.
"phosphorylation enhances choline acetyltransferase
catalytic activity."
Substrate binding and catalytic mechanism of human choline acetyltransferase.
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Human ChAT binary structures with choline, CoA and an acetyl-CoA analogue support substrate recognition and a modeled direct acetyl-transfer mechanism; a ternary Michaelis complex is modeled rather than directly solved.
"structures for binary complexes of ChAT with
choline, CoA, and a nonhydrolyzable acetyl-CoA analogue"
Interactome Mapping Provides a Network of Neurodegenerative Disease Proteins and Uncovers Widespread Protein Aggregation in Affected Brains.
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The original screen excluded autoactivating baits, used HIS3/URA3/lacZ reporters, repeated the search space and retested pooled positives pairwise. Its separate mammalian DULIP experiment tested a random subset; no individual CHAT pair is identified here as independently validated in that assay. Exact CHAT-3/partner records, including fragment boundaries, support assay-scoped associations rather than a native neuronal interaction network.
Cho is acetylated to AcCho by CHAT
Acetylcholine Neurotransmitter Release Cycle
Nuclear localization of the 82-kDa form of human choline acetyltransferase.
Identification of a novel nuclear localization signal common to 69- and 82-kDa human choline acetyltransferase.
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Normal cache is abstract-only. Selected indexed original localization, mutant/shuttling Results and Discussion inspected. Nuclear activity with supplied substrates is reported, but detailed isolated-nuclei enzyme-assay Methods were not independently recovered; no claim of a resolved physiological nuclear reaction is made.
82-kDa choline acetyltransferase is in nuclei of cholinergic neurons in human CNS and altered in aging and Alzheimer disease.
Choline acetyltransferase mutations cause myasthenic syndrome associated with episodic apnea in humans.
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Human recombinant-enzyme kinetics distinguish an inactive E441K variant from eight mutants with reduced catalytic efficiency; the endplate phenotype is interpreted together with these direct enzyme measurements. Full primary Methods and Results were inspected externally, separately from the abstract-only normal cache.
"one mutant (E441K) lacks catalytic activity"
Nuclear choline acetyltransferase activates transcription of a high-affinity choline transporter.
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Human ChAT-GFP increases SLC5A7 expression in the tested SH-SY5Y system, with nuclear targeting and catalytic competence required. The inactive nuclear mutant fails to induce the transcript; the downstream mechanism remains unresolved, so this is not assigned as direct DNA binding or coactivator activity.
"inactive nuclear hChAT also could not enhance CHT1 transcription"
CHAT exact interaction, ontology, product and pathway evidence
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Authored extraction of genuine database fields and source-access evidence, independently checked against the literal records in the campaign peer review. VERIFIED applies to the correctness of that extraction and its identified provenance, not to an independent biological experiment, provider report or certification of every physiological screen interaction. The added follow-up evidence paragraphs are explicitly authored paraphrases, not primary-source quotations.