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Cysteine

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Identification
Molecular formula
C3H7NO2S
CAS number
52-90-4
IUPAC name
2-amino-3-(carboxymethylsulfanyl)propanoic acid
State
State

At room temperature, cysteine is typically a solid. It is usually found in a crystallized form and is soluble in water.

Melting point (Celsius)
240.00
Melting point (Kelvin)
513.00
Boiling point (Celsius)
230.00
Boiling point (Kelvin)
503.00
General information
Molecular weight
121.16g/mol
Molar mass
121.1580g/mol
Density
1.5340g/cm3
Appearence

Cysteine typically appears as a white powder or crystalline solid. It can also appear as transparent crystals, often with a microcrystalline structure.

Comment on solubility

Solubility of 2-amino-3-(carboxymethylsulfanyl)propanoic acid

The solubility of 2-amino-3-(carboxymethylsulfanyl)propanoic acid, or L-cysteine, with the chemical formula C3H7NO2S, is an intriguing topic often discussed in the realm of biochemistry and nutrition.

This compound is known to exhibit *high solubility* in water, a property that can be attributed to its functional groups. Key factors that influence its solubility include:

  • Functional groups: The presence of both amino (-NH2) and carboxyl (-COOH) groups makes it very polar.
  • Hydrophilicity: The carboxymethylsulfanyl group enhances the hydrophilic character, promoting interactions with water molecules.
  • pH dependence: The solubility can vary depending on the pH of the solution; at lower pH levels, it may exist in more protonated forms, affecting its solubility.

As a result, we often see this compound readily dissolving in aqueous solutions, making it highly bioavailable in various biological systems. Furthermore, the ability to easily *dissolve* can influence its role in metabolic processes and its interactions with other biomolecules. Understanding solubility not only helps in applications like drug formulation but also in nutritional sciences where amino acids play critical roles.

In summary, 2-amino-3-(carboxymethylsulfanyl)propanoic acid is a polar and hydrophilic compound that demonstrates **high water solubility**, essential for its biological functions.

Interesting facts

Exploring 2-amino-3-(carboxymethylsulfanyl)propanoic acid

2-amino-3-(carboxymethylsulfanyl)propanoic acid, also known as cysteine, is a fascinating and vital compound in the realm of biochemistry. Here are some intriguing aspects of this compound:

  • Amino Acid Significance: Cysteine is one of the 20 standard amino acids used by cells in protein biosynthesis. It plays a crucial role in forming protein structures through the formation of disulfide bonds, contributing to the stability and proper folding of proteins.
  • Antioxidant Properties: Cysteine is a precursor to glutathione, a powerful antioxidant that helps combat oxidative stress in cells. This highlights cysteine’s role in protecting cellular components from damage.
  • Metabolism: It is notable for its involvement in the synthesis of several important biomolecules, including coenzyme A and biotin, which are essential for various metabolic pathways.

Moreover, cysteine contains a sulfhydryl (-SH) group, providing it with unique chemical reactivity that is vital in enzymatic reactions:

  • The sulfhydryl group can easily engage in redox reactions, allowing cysteine to act as a reducing agent in various biochemical processes.
  • It is often found in active sites of enzymes, where it can play a direct role in catalysis.

In clinical research, cysteine is of particular interest as it is thought to have therapeutic potential in treating various conditions, including:

  • Respiratory diseases, where it may help break down mucus.
  • Diabetes and insulin resistance due to its role in detoxification and antioxidant defense.

As a valuable building block for proteins and a key player in many metabolic processes, 2-amino-3-(carboxymethylsulfanyl)propanoic acid continues to be a subject of investigation in both academic research and pharmaceutical development.

In conclusion, cysteine is much more than just an amino acid; it embodies the intricate relationships within biological systems and opens up exciting avenues for future research and therapeutic applications.

Synonyms
25390-17-4
2387-59-9
S-(Carboxymethyl)-DL-cysteine
(RS)-Carbocisteine
S-Carboxymethylcysteine
S-(Carboxymethyl)cysteine
5-Amino-3-thiadihexanoic acid
Carbocysteine, DL-
3-(Carboxymethylthio)alanine
S-(Carboxymethyl)-(RS)-cysteine
2-amino-3-(carboxymethylsulfanyl)propanoic acid
DL-3-(Carboxymethylthio)alanine
L-Carboxymethylcysteine
2-amino-3-[(carboxymethyl)sulfanyl]propanoic acid
Cysteine, S-(carboxymethyl)-
L-Cysteine, S-(carboxymethyl)-
2-Amino-3-(carboxymethylthio)propionic acid
Broncodeterge
DTXSID9022738
4252LRM78Q
NSC-68427
NCGC00159426-02
Mucodine
DL-carbocysteine
Carbocisteine-13C3
SCMC
Carbocysteine (USAN)
Carbocysteine, DL
CAS-2387-59-9
1-Carboxymethylcysteine
186537-58-6
NSC 68427
DTXCID702738
Cysteine,S-(carboxymethyl)-
UNII-4252LRM78Q
1-carboxy-2-carboxymethylmercaptoethyl amine
L.J.206
DL-cysteine, S-(carboxymethyl)-
EINECS 246-934-4
Mucofan (TN)
(RS)-Cysteine, S-(carboxymethyl)-
Carboxymethylenecysteine
SCHEMBL69149
(CARBOXYMETHYL)CYSTEINE
S-(2-carboxy-methyl)cysteine
CARBOCISTEINE [WHO-DD]
H-DL-Cys(S-carboxymethyl)-OH
CHEMBL1447969
CARBOCYSTEINE DL-FORM [MI]
BCP13359
HY-D0205
NSC14156
NSC68427
Tox21_111658
BBL036318
STL558958
.beta.-(Carboxymethylmercapto)alanine
AKOS009157540
Tox21_111658_1
CS-7884
NCGC00159426-03
NCGC00263559-01
DA-48825
VS-13419
DB-054557
DB-054558
NS00006061
D06393
EN300-150321
G77763
L-Cysteine, S-(carboxymethyl)-;2387-59-9
SR-01000944402
SR-01000944402-1
Q27258488