CHEBI:16040 - cytosine

Main ChEBI Ontology Automatic Xrefs Reactions Pathways Models
ChEBI Name cytosine
ChEBI ID CHEBI:16040
Definition An aminopyrimidine that is pyrimidin-2-one having the amino group located at position 4.
Stars This entity has been manually annotated by the ChEBI Team.
Secondary ChEBI IDs CHEBI:23531, CHEBI:41732, CHEBI:4072, CHEBI:14066
Supplier Information ChemicalBook:CB3746093, eMolecules:496404, eMolecules:1971016, eMolecules:7351983, ZINC000000895210
Download Molfile XML SDF
more structures >>
Wikipedia License
Waiting for wikipedia content
Read full article at Wikipedia
Formula C4H5N3O
Net Charge 0
Average Mass 111.10212
Monoisotopic Mass 111.04326
InChI InChI=1S/C4H5N3O/c5-3-1-2-6-4(8)7-3/h1-2H,(H3,5,6,7,8)
InChIKey OPTASPLRGRRNAP-UHFFFAOYSA-N
SMILES Nc1cc[nH]c(=O)n1
Metabolite of Species Details
Mus musculus (NCBI:txid10090) Source: BioModels - MODEL1507180067 See: PubMed
Saccharomyces cerevisiae (NCBI:txid4932) Source: yeast.sf.net See: PubMed
Escherichia coli (NCBI:txid562) See: PubMed
Homo sapiens (NCBI:txid9606) See: DOI
Roles Classification
Chemical Role(s): Bronsted base
A molecular entity capable of accepting a hydron from a donor (Bronsted acid).
(via organic amino compound )
Biological Role(s): human metabolite
Any mammalian metabolite produced during a metabolic reaction in humans (Homo sapiens).
Escherichia coli metabolite
Any bacterial metabolite produced during a metabolic reaction in Escherichia coli.
Saccharomyces cerevisiae metabolite
Any fungal metabolite produced during a metabolic reaction in Baker's yeast (Saccharomyces cerevisiae ).
mouse metabolite
Any mammalian metabolite produced during a metabolic reaction in a mouse (Mus musculus).
View more via ChEBI Ontology
ChEBI Ontology
Outgoing cytosine (CHEBI:16040) has role Escherichia coli metabolite (CHEBI:76971)
cytosine (CHEBI:16040) has role Saccharomyces cerevisiae metabolite (CHEBI:75772)
cytosine (CHEBI:16040) has role human metabolite (CHEBI:77746)
cytosine (CHEBI:16040) has role mouse metabolite (CHEBI:75771)
cytosine (CHEBI:16040) is a aminopyrimidine (CHEBI:38338)
cytosine (CHEBI:16040) is a pyrimidine nucleobase (CHEBI:26432)
cytosine (CHEBI:16040) is a pyrimidone (CHEBI:38337)
Incoming 1-(β-D-xylopyranosyl)cytosine (CHEBI:132134) has functional parent cytosine (CHEBI:16040)
1-(2,3-dideoxy-6-O-phosphono-β-D-erythro-hexopyranosyl)cytosine (CHEBI:46480) has functional parent cytosine (CHEBI:16040)
1-(2-deoxy-2-fluoro-5-O-phosphono-β-D-arabinofuranosyl)cytosine (CHEBI:41429) has functional parent cytosine (CHEBI:16040)
1-(5-{[3-(1H-benzimidazol-2-yl)propanoyl]amino}-5-deoxy-α-L-lyxofuranosyl)cytosine (CHEBI:44465) has functional parent cytosine (CHEBI:16040)
1-methylcytosine (CHEBI:39624) has functional parent cytosine (CHEBI:16040)
2'-deoxy-5,6-dihydroxy-5,6-dihydrocytidine (CHEBI:132169) has functional parent cytosine (CHEBI:16040)
2'-deoxycytidine (CHEBI:15698) has functional parent cytosine (CHEBI:16040)
2-O-methylcytosine (CHEBI:70854) has functional parent cytosine (CHEBI:16040)
3,N4-ethenocytosine (CHEBI:29147) has functional parent cytosine (CHEBI:16040)
3-ethylcytosine (CHEBI:74029) has functional parent cytosine (CHEBI:16040)
3-methylcytosine (CHEBI:39992) has functional parent cytosine (CHEBI:16040)
4-amino-1-[2,5-anhydro-4-(hydroxymethyl)-α-L-lyxofuranosyl]-5-methylcytosine (CHEBI:43697) has functional parent cytosine (CHEBI:16040)
5-(hydroxymethyl)cytosine (CHEBI:76792) has functional parent cytosine (CHEBI:16040)
5-carboxycytosine (CHEBI:76793) has functional parent cytosine (CHEBI:16040)
5-formylcytosine (CHEBI:76794) has functional parent cytosine (CHEBI:16040)
5-methylcytosine (CHEBI:27551) has functional parent cytosine (CHEBI:16040)
N-[(cytosin-1-yl)acetyl]-N-[2-(methylamino)ethyl]glycine (CHEBI:41561) has functional parent cytosine (CHEBI:16040)
N4-acetylcytosine (CHEBI:146134) has functional parent cytosine (CHEBI:16040)
N4-methylcytosine (CHEBI:21839) has functional parent cytosine (CHEBI:16040)
antelmycin (CHEBI:88275) has functional parent cytosine (CHEBI:16040)
cytarabine (CHEBI:28680) has functional parent cytosine (CHEBI:16040)
cytidine (CHEBI:17562) has functional parent cytosine (CHEBI:16040)
cytidine phosphate (CHEBI:23523) has functional parent cytosine (CHEBI:16040)
cytidines (CHEBI:23524) has functional parent cytosine (CHEBI:16040)
cytosine glycol (CHEBI:29127) has functional parent cytosine (CHEBI:16040)
cytosylglucuronic acid (CHEBI:132133) has functional parent cytosine (CHEBI:16040)
flucytosine (CHEBI:5100) has functional parent cytosine (CHEBI:16040)
gougerotin (CHEBI:156351) has functional parent cytosine (CHEBI:16040)
lamivudine (CHEBI:63577) has functional parent cytosine (CHEBI:16040)
methylcytosine (CHEBI:134207) has functional parent cytosine (CHEBI:16040)
cytosin1-yl group (CHEBI:65273) is substituent group from cytosine (CHEBI:16040)
IUPAC Name
4-aminopyrimidin-2(1H)-one
Synonyms Sources
4-amino-2(1H)-pyrimidinone NIST Chemistry WebBook
4-amino-2-hydroxypyrimidine NIST Chemistry WebBook
C ChEBI
Cyt CBN
Cytosin ChEBI
Cytosine KEGG COMPOUND
cytosine UniProt
Zytosin ChEBI
Manual Xrefs Databases
C00001498 KNApSAcK
C00380 KEGG COMPOUND
CYT PDBeChem
Cytosine Wikipedia
CYTOSINE MetaCyc
HMDB0000630 HMDB
View more database links
Registry Numbers Types Sources
2637 Reaxys Registry Number Reaxys
71-30-7 CAS Registry Number KEGG COMPOUND
71-30-7 CAS Registry Number ChemIDplus
71-30-7 CAS Registry Number NIST Chemistry WebBook
82472 Gmelin Registry Number Gmelin
Citations Waiting for Citations Types Sources
14253484 PubMed citation Europe PMC
22770225 PubMed citation Europe PMC
7877593 PubMed citation Europe PMC
Last Modified
13 February 2020