Cysteine

CHEBI:15356 chemically defined MAPPED CHEBI EXACT_MATCH

Ontology mapping

Primary identifier
CHEBI:15356
Ontology label
cysteine

Nutritional roles

Synonyms (12)

SynonymTypeSourceOccurrences
Role: Nitrogen source; Properties: Defined component, Organic compound, Simple component RAW_TEXT CultureMech
Role: Nitrogen source; Properties: Defined component, Simple component, Organic compound RAW_TEXT CultureMech
Role: Nitrogen source; Properties: Organic compound, Defined component, Simple component RAW_TEXT CultureMech
Role: Nitrogen source; Properties: Organic compound, Simple component, Defined component RAW_TEXT CultureMech
Role: Nitrogen source; Properties: Simple component, Organic compound, Defined component RAW_TEXT CultureMech
2-Amino-3-mercaptopropionic acid EXACT_SYNONYM kg_microbe
2-amino-3-mercaptopropanoic acid EXACT_SYNONYM kg_microbe
2-amino-3-sulfanylpropanoic acid EXACT_SYNONYM kg_microbe
Cystein EXACT_SYNONYM kg_microbe
Hcys EXACT_SYNONYM kg_microbe
Zystein EXACT_SYNONYM kg_microbe
cisteina EXACT_SYNONYM kg_microbe

Chemical properties

Cas rn
3374-22-9
Data source
PubChem (via CHEBI:15356)
Retrieval date
2026-04-09T00:32:50.689620+00:00
Molecular formula
C3H7NO2S
Inchi
InChI=1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)
Smiles
NC(CS)C(=O)O

Evidence (1)

DATABASE_MATCH via CultureMech

Imported from CultureMech pipeline, quality=DIRECT_MATCH

Occurrence statistics

Total occurrences
51
Distinct media
51

Curation history

TimestampCuratorActionNew statusChanges
2026-03-09T06:54:18.022301+00:00 import_from_culturemech IMPORTED MAPPED Initial import from CultureMech pipeline
2026-04-05T19:51:39.769170+00:00 fetch_cas_rn_from_pubchem ADDED_CAS_RN MAPPED Added CAS-RN:52-90-4 from PubChem API via name lookup (Cystein)
2026-04-05T23:44:02.487622+00:00 fetch_cas_rn_with_preprocessing ADDED_CAS_RN MAPPED Added CAS-RN:52-90-4 from PubChem API (ontology label) via name preprocessing (cysteine)
2026-04-09T00:32:50.689620+00:00 enrich_mim_cas_rn_batch CAS_RN_ADDED MAPPED Added CAS-RN 3374-22-9 from PubChem (via CHEBI:15356)
2026-04-18T00:00:00+00:00 cbclaw_kg_microbe_sweep LLM ADDED_SYNONYMS MAPPED Added 7 synonyms from kg-microbe P4.4 enrichment: 2-Amino-3-mercaptopropionic acid, 2-amino-3-mercaptopropanoic acid, 2-amino-3-sulfanylpropanoic acid, Cystein, Hcys, ... (2 more)
2026-04-18T00:00:00+00:00 cbclaw_kg_microbe_sweep LLM ADDED_SYNONYMS MAPPED Added 6 synonyms from kg-microbe P4.4 enrichment: 2-Amino-3-mercaptopropionic acid, 2-amino-3-mercaptopropanoic acid, 2-amino-3-sulfanylpropanoic acid, Hcys, Zystein, ... (1 more)
2026-04-19T07:39:40.088622+00:00 audit_mim_merge MERGED_FROM_DUPLICATES MAPPED Absorbed 2 duplicate MIM record(s) into this one: Cysteine_2.yaml, Cystein.yaml. Synonyms, curation_history, and occurrence counts were unioned/summed; winner selected by highest occurrence count with preferred_term readability tie-break.
2026-04-19T07:39:40.088267+00:00 audit_resolve_risky_cas_rn RESOLVED_CAS_RN_CONFLICT MAPPED CAS-RN conflict across merged group (3374-22-9|52-90-4) resolved via OAK canonical xref: 3374-22-9 (match)
2026-05-01T07:35:33.022961+00:00 auto_classify_ingredient_type AUTO_CLASSIFY_INGREDIENT_TYPE set ingredient_type=SINGLE_INGREDIENT (CHEBI primary)
2026-05-01T08:08:28.933141+00:00 auto_classify_ingredient_type AUTO_BACKFILL_CHEBI_CHEMISTRY molecular_formula=C3H7NO2S; inchi=InChI=1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,; smiles=NC(CS)C(=O)O
2026-05-02T03:12:13.682682+00:00 auto_classify_ingredient_type AUTO_CLASSIFY_INGREDIENT_TYPE set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-05-29T23:35:36.110834+00:00 extract_roles_from_synonyms ANNOTATED Added media role: NITROGEN_SOURCE (confidence: 1.00)
2026-06-09T05:23:46.748148+00:00 correct_stale_ontology_labels.py CORRECTED ontology_label 'Cysteine' -> 'cysteine': synced to canonical CHEBI label (preferred_term 'Cysteine' unchanged).
2026-07-20T00:00:00+00:00 migrate_media_roles_to_facets ANNOTATED Migrated legacy media_roles to role facets (#128): NITROGEN_SOURCE -> nutritional_roles.NITROGEN_SOURCE
2026-08-27T03:16:39.518675+00:00 refresh_occurrence_statistics CORRECTED occurrence_statistics 44/44 -> 51/51 (media_count/total_occurrences), derived from distinct CultureMech recipe ids in the #337 occurrence table. The prior values came from the importer retired in #453, whose media_count counted a list truncated to 50 examples (#449). [source=ingredient_occurrences.tsv culturemech_rev=15a4da5c08 rows=194137 distinct_recipes=15257]