Compound

S-disulfanyl-L-cysteine

An L-α-amino acid zwitterion that results from the transfer of a proton from the carboxylic acid group to the amino group of 3-trisulfanyl-L-alanine; Major species at pH 7.3.

Definition from ChEBI (CHEBI:229465), read 2026-09-23. CC BY 4.0.

CHEBI:229465ChEBI

Open in the graph

Structure

2D depiction · 3D model shown

Loading the model…

A generated conformer of S-disulfanyl-L-cysteine — one low-energy arrangement PubChem computed, not a measured structure. Hydrogens are not drawn; the formula counts them.

Class: Organic compound
Formula: C3H7NO2S3
Mass: 185.295 g/mol
Charge: 0
InChIKey: WBUQYANSBCOQMP-REOHCLBHSA-N
SMILES: [NH3+][C@@H](CSSS)C(=O)[O-]
Look it up: ChEBI PubChem By InChIKey

Identity from ChEBI, geometry from PubChem. Not evidence.

What it touches on the way

Mechanistic reach

1 entity

1 entities reached.

0 reported hops1 assembled from the scaffold

CARS2ProteinUNIPROT:Q9HA77substrate ofInferred only8 paths4 endpoints

What the reference databases state

Statements

2 statements

2 statements · 1 reference database · Subject: S-disulfanyl-L-cysteine · Sources: Rhea

Order

S-disulfanyl-L-cysteine is a substrate of CARS2ProteinRhea RHEA:78627Inferred only
S-disulfanyl-L-cysteine is a substrate of CARS2ProteinRhea RHEA:78651Inferred only

Reactions

2 reactions

S-sulfanyl-L-cysteine+L-cysteineS-disulfanyl-L-cysteine+L-alanine
Catalysed by CARS2
Reaction pageLeft to rightBalance undeterminable
Rhea RHEA:78627CC BY 4.0Reference data
S-disulfanyl-L-cysteine+CHEBI:78442+ATP(4-)CHEBI:229521+AMP+diphosphate(3-)
Catalysed by CARS2
Reaction pageLeft to rightBalance undeterminable
Rhea RHEA:78651CC BY 4.0Reference data

Other names

3 names

Resolves to: S-disulfanyl-L-cysteine

Also called: (2R)-2-ammonio-3-(disulfanylsulfanyl)propanoate(2R)-2-azaniumyl-3-(disulfanylsulfanyl)propanoate
Systematic name: (2R)-2-azaniumyl-3-trisulfanylpropanoate