Compound

L-cysteate

A L-α-amino acid anion that is the conjugate base of L-cysteic acid arising from deprotonation of the carboxy and sulfo groups and protonation of the amino group; major species at pH 7.3.

Definition from ChEBI (CHEBI:58090), read 2026-09-23. CC BY 4.0.

CHEBI:58090ChEBI

Open in the graph

Structure

2D depiction · 3D model shown

Loading the model…

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

Class: Organic compound, anion
Formula: C3H6NO5S
Mass: 168.15 g/mol
Charge: -1
InChIKey: XVOYSCVBGLVSOL-REOHCLBHSA-M
SMILES: [NH3+][C@@H](CS(=O)(=O)[O-])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

2 entities

2 entities reached.

0 reported hops2 assembled from the scaffold

What the reference databases state

Statements

4 statements

4 statements · 1 reference database · Subject: L-cysteate · Sources: Rhea

Order

L-cysteate is converted to taurineCompoundRhea RHEA:25221Inferred only
taurine is converted to L-cysteateCompoundRhea RHEA:25221Inferred only
L-cysteate is a substrate of CSADProteinRhea RHEA:25221Inferred only
L-cysteate is a substrate of GADL1ProteinRhea RHEA:25221Inferred only

Reactions

7 reactions

L-cysteate+watersulfite+pyruvate+ammonium+hydron
Reaction pageDirection not assertedBalance undeterminable
Rhea RHEA:13441CC BY 4.0Reference data
sulfite+L-cysteineL-cysteate+hydrogen sulfide
Reaction pageDirection not assertedBalance undeterminable
Rhea RHEA:20916CC BY 4.0Reference data
L-cysteate+hydrontaurine+carbon dioxide
Catalysed by GADL1 or CSAD
Reaction pageDirection not assertedBalance undeterminable
Rhea RHEA:25221CC BY 4.0Reference data
CHEBI:57524+sulfite+hydronL-cysteate+hydrogenphosphate
Reaction pageDirection not assertedBalance undeterminable
Rhea RHEA:26486CC BY 4.0Reference data
L-cysteate2-aminoprop-2-enoate+sulfite+hydron
Reaction pageDirection not assertedBalance undeterminable
Rhea RHEA:43028CC BY 4.0Reference data
L-cysteate+hexadecanoyl-CoA+hydronCHEBI:231946+carbon dioxide+coenzyme A(4-)
Reaction pageDirection not assertedBalance undeterminable
Rhea RHEA:81567CC BY 4.0Reference data
CHEBI:70827+L-cysteate+hydronCHEBI:231947+carbon dioxide+coenzyme A(4-)
Reaction pageDirection not assertedBalance undeterminable
Rhea RHEA:81571CC BY 4.0Reference data

Other names

3 names

Resolves to: L-cysteate

Also called: (2R)-2-ammonio-3-sulfonatopropanoateL-cysteate anion
Systematic name: (2R)-2-azaniumyl-3-sulfonatopropanoate