RefMet Compound Details

RefMet ID, RefMet name, exact mass and formula
RefMet ID	RM0135906
RefMet name	Cystine
Systematic name	(2R)-2-amino-3-{[(2R)-2-amino-2-carboxyethyl]disulfanyl}propanoic acid
Synonyms	PubChem Synonyms
Exact mass	240.023852 (neutral)	Calculate m/z: (Choose adduct) [M+H]+ [M+H-H2O]+ [M.]+ [M+2H]2+ [M+3H]3+ [M+4H]4+ [M+K]+ [M+2K]2+ [M+2K-H]+ [M+Na]+ [M+2Na]2+ [M+2Na-H]+ [M+Li]+ [M+2Li]2+ [M+NH4]+ [M.CH3]+ [M+Ag]+ [M+H+CH3OH]+ [M+H+CH3CN]+ [M+H+2CH3CN]+ [M+Na+CH3CN]+ [M.NaFormate+H]+ [M.NH4Formate+H]+ [M.TMSi]+ [M.tBuDMSi]+ [M+H-Hexose]+ [M+H-EtnP]+ [M+H-SerP]+ [M-H]- [M-H-H2O]- [M-CH3]- [M-2H]2- [M-3H]3- [M-4H]4- [M+Cl]- [M+OAc]- [M+Na-2H]- [M+K-2H]- [M.Formate]- [M.NaFormate-H]- [M.NH4Formate-H]- [M.F]- [M-H-Ser]- [M.HF2]- M(neutral)    View other RefMet entries with this exact (neutral) mass:   +/- 0.05 amu   +/- 0.1 amu   +/- 0.2 amu   +/- 0.5 amu
Formula	C6H12N2O4S2	View other entries in RefMet with this formula
Molecular descriptors
Molfile	37127 (Download molfile/View MW Metabolite Database details)
InChI	InChI=1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m0/s1
InChIKey	LEVWYRKDKASIDU-IMJSIDKUSA-N	View other enantiomers/diastereomers of this metabolite in RefMet
SMILES	C([C@@H](C(=O)O)N)SSC[C@@H](C(=O)O)N Run Tanimoto similarity search (with similarity coefficient >=0.6)
Chemical/Biochemical Classification
Super Class	Organic acids
Main Class	Amino acids and peptides
Sub Class	Amino acids
Distribution of Cystine in NMDR studies
Species	Plot Species distribution
Sample source	Plot Sample source(tissue) distribution
Studies	NMDR Studies reporting Cystine
External Links
Pubchem CID	67678
ChEBI ID	16283
KEGG ID	C00491
HMDB ID	HMDB0000192
Chemspider ID	60997
MetaCyc ID	CYSTINE
EPA CompTox	DTXCID60210087
Spectral data for Cystine standards
BMRB ID(NMR)	View NMR spectra
NP-MRD ID(NMR)	View NMR spectra
MassBank(EU)	View MS spectra
Structural annotation level
Annotation level	1   (1:Known structure; 2:Known regiochemistry; 3:Partial structure; 4:Sum-composition)

Table of KEGG reactions in human pathways involving Cystine

Rxn ID	KEGG Reaction	Enzyme
R02408	L-Cystine + H2O <=> Pyruvate + Ammonia + Thiocysteine	L-cystine thiocysteine-lyase (deaminating

Table of KEGG human pathways containing Cystine

Pathway ID	Human Pathway	# of reactions
hsa00270	Cysteine and methionine metabolism	1