<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2010-04-08 22:10:18 UTC</creation_date>
  <update_date>2019-11-26 03:07:22 UTC</update_date>
  <accession>FDB012676</accession>
  <name>3-(Methylthio)alanine</name>
  <description>Occurs in all members of the genus Allium, at least two genera of Brassicaceae family (Brassica and Raphanus) and sporadically in the families Compositae, Leguminosae and Umbelliferae. Found in kidney bean seeds (Phaseolus vulgaris)

Methylcysteine is one of the identified number of bioactive substances in garlic that are water soluble. (PMID 16484549); It has been suggested that the use of these organosulfur agents derived from garlic could protect partially oxidized and glycated LDL or plasma against further oxidative and glycative deterioration, which might benefit patients with diabetic-related vascular diseases. (PMID 15161248); It may also exert some chemopreventive effects on chemical carcinogenesis. However, it should be borne in mind that may also demonstrate promotion potential, depending on the organ examined. (PMID 9591199). S-Methylcystein is a biomarker for the consumption of dried and cooked beans.</description>
  <synonyms>
    <synonym>(R)-2-Amino-3-(methylmercapto)propionic acid</synonym>
    <synonym>3-(methylthio)-L-(8CI)alanine</synonym>
    <synonym>3-(methylthio)-L-alanine</synonym>
    <synonym>3-(Methylthio)alanine</synonym>
    <synonym>Acm-thiopropionate</synonym>
    <synonym>Acm-thiopropionic acid</synonym>
    <synonym>Alanine, 3-(methylthio)-, L-</synonym>
    <synonym>Alanine, 3-(methylthio)-, L- (8CI)</synonym>
    <synonym>CYM</synonym>
    <synonym>Cysteine, s-methyl-</synonym>
    <synonym>L-aspartic acid dimethyl ester</synonym>
    <synonym>L-cysteine, s-methyl-</synonym>
    <synonym>L-Cysteine, S-methyl- (9CI)</synonym>
    <synonym>L-methylcysteine</synonym>
    <synonym>Methylcysteine, l-</synonym>
    <synonym>S-acetamidomethyl-deamino-cysteine</synonym>
    <synonym>S-methyl-(9CI)-L-cysteine</synonym>
    <synonym>S-methyl-cysteine</synonym>
    <synonym>S-methyl-DL-cysteine</synonym>
    <synonym>S-methyl-l-cysteine</synonym>
    <synonym>S-Methylcysteine</synonym>
    <synonym>SMC</synonym>
  </synonyms>
  <chemical_formula>C4H9NO2S</chemical_formula>
  <average_molecular_weight>135.185</average_molecular_weight>
  <monisotopic_moleculate_weight>135.035399227</monisotopic_moleculate_weight>
  <iupac_name>2-amino-3-(methylsulfanyl)propanoic acid</iupac_name>
  <traditional_iupac>methylcysteine</traditional_iupac>
  <cas_registry_number>1187-84-4</cas_registry_number>
  <smiles>CSCC(N)C(O)=O</smiles>
  <inchi>InChI=1S/C4H9NO2S/c1-8-2-3(5)4(6)7/h3H,2,5H2,1H3,(H,6,7)</inchi>
  <inchikey>IDIDJDIHTAOVLG-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <description> belongs to the class of organic compounds known as cysteine and derivatives. Cysteine and derivatives are compounds containing cysteine or a derivative thereof resulting from reaction of cysteine at the amino group or the carboxy group, or from the replacement of any hydrogen of glycine by a heteroatom.</description>
    <direct_parent>Cysteine and derivatives</direct_parent>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organic acids and derivatives</super_class>
    <class>Carboxylic acids and derivatives</class>
    <sub_class>Amino acids, peptides, and analogues</sub_class>
    <molecular_framework>Aliphatic acyclic compounds</molecular_framework>
    <alternative_parents>
      <alternative_parent>Alpha amino acids</alternative_parent>
      <alternative_parent>Amino acids</alternative_parent>
      <alternative_parent>Carbonyl compounds</alternative_parent>
      <alternative_parent>Carboxylic acids</alternative_parent>
      <alternative_parent>Dialkylthioethers</alternative_parent>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>Monoalkylamines</alternative_parent>
      <alternative_parent>Monocarboxylic acids and derivatives</alternative_parent>
      <alternative_parent>Organic oxides</alternative_parent>
      <alternative_parent>Organopnictogen compounds</alternative_parent>
      <alternative_parent>Sulfenyl compounds</alternative_parent>
    </alternative_parents>
    <substituents>
      <substituent>Aliphatic acyclic compound</substituent>
      <substituent>Alpha-amino acid</substituent>
      <substituent>Amine</substituent>
      <substituent>Amino acid</substituent>
      <substituent>Carbonyl group</substituent>
      <substituent>Carboxylic acid</substituent>
      <substituent>Cysteine or derivatives</substituent>
      <substituent>Dialkylthioether</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>Monocarboxylic acid or derivatives</substituent>
      <substituent>Organic nitrogen compound</substituent>
      <substituent>Organic oxide</substituent>
      <substituent>Organic oxygen compound</substituent>
      <substituent>Organonitrogen compound</substituent>
      <substituent>Organooxygen compound</substituent>
      <substituent>Organopnictogen compound</substituent>
      <substituent>Organosulfur compound</substituent>
      <substituent>Primary aliphatic amine</substituent>
      <substituent>Primary amine</substituent>
      <substituent>Sulfenyl compound</substituent>
      <substituent>Thioether</substituent>
    </substituents>
    <external_descriptors>
    </external_descriptors>
  </taxonomy>
  <state>Solid</state>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>-2.21</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-0.31</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>6.58e+01 g/l</value>
      <source>ALOGPS</source>
    </property>
  </predicted_properties>
  <experimental_properties>
    <property>
      <kind>melting_point</kind>
      <value>Mp 234-236 dec. (207-211°)</value>
    </property>
  </experimental_properties>
  <property>
    <kind>logp</kind>
    <value>-2.4</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_acidic</kind>
    <value>2.44</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_basic</kind>
    <value>9.15</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>iupac</kind>
    <value>2-amino-3-(methylsulfanyl)propanoic acid</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>average_mass</kind>
    <value>135.185</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>mono_mass</kind>
    <value>135.035399227</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>smiles</kind>
    <value>CSCC(N)C(O)=O</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>formula</kind>
    <value>C4H9NO2S</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchi</kind>
    <value>InChI=1S/C4H9NO2S/c1-8-2-3(5)4(6)7/h3H,2,5H2,1H3,(H,6,7)</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchikey</kind>
    <value>IDIDJDIHTAOVLG-UHFFFAOYSA-N</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polar_surface_area</kind>
    <value>63.32</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>refractivity</kind>
    <value>32.87</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polarizability</kind>
    <value>13.56</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>rotatable_bond_count</kind>
    <value>3</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>acceptor_count</kind>
    <value>3</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>donor_count</kind>
    <value>2</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>physiological_charge</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>formal_charge</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <pathways>
  </pathways>
  <spectra>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>73113</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>73114</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>73115</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>132204</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>132205</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>132206</spectrum_id>
    </spectrum>
  </spectra>
  <hmdb_id>HMDB02108</hmdb_id>
  <pubchem_compound_id/>
  <chemspider_id/>
  <kegg_id/>
  <chebi_id/>
  <biocyc_id/>
  <het_id>SMC</het_id>
  <wikipidia/>
  <vmh_id/>
  <fbonto_id/>
  <foodb_id/>
  <general_references>
    <reference>#&lt;Reference:0x000055ce32b8e3f8&gt;</reference>
    <reference>#&lt;Reference:0x000055ce32b8e060&gt;</reference>
    <reference>#&lt;Reference:0x000055ce32b8dd68&gt;</reference>
  </general_references>
  <foods>
    <food>
      <name>Brassicas</name>
      <food_type>Unknown</food_type>
      <category>generic</category>
      <name_scientific/>
      <ncbi_taxonomy_id>3705</ncbi_taxonomy_id>
    </food>
    <food>
      <name>Garden onion</name>
      <food_type>Type 1</food_type>
      <category>specific</category>
      <name_scientific>Allium cepa</name_scientific>
      <ncbi_taxonomy_id>4679</ncbi_taxonomy_id>
    </food>
    <food>
      <name>Garden onion (var.)</name>
      <food_type>Type 1</food_type>
      <category>specific</category>
      <name_scientific>Allium cepa var. cepa</name_scientific>
      <ncbi_taxonomy_id>4679</ncbi_taxonomy_id>
    </food>
    <food>
      <name>Green bean</name>
      <food_type>Type 1</food_type>
      <category>specific</category>
      <name_scientific>Phaseolus vulgaris</name_scientific>
      <ncbi_taxonomy_id>3885</ncbi_taxonomy_id>
    </food>
    <food>
      <name>Green onion</name>
      <food_type>Type 1</food_type>
      <category/>
      <name_scientific/>
      <ncbi_taxonomy_id/>
    </food>
    <food>
      <name>Lima bean</name>
      <food_type>Type 1</food_type>
      <category>specific</category>
      <name_scientific>Phaseolus lunatus</name_scientific>
      <ncbi_taxonomy_id>3884</ncbi_taxonomy_id>
    </food>
    <food>
      <name>Milk (Cow)</name>
      <food_type>Type 2</food_type>
      <category>specific</category>
      <name_scientific></name_scientific>
      <ncbi_taxonomy_id/>
    </food>
    <food>
      <name>Onion-family vegetables</name>
      <food_type>Unknown</food_type>
      <category>generic</category>
      <name_scientific/>
      <ncbi_taxonomy_id/>
    </food>
    <food>
      <name>Pulses</name>
      <food_type>Unknown</food_type>
      <category>generic</category>
      <name_scientific></name_scientific>
      <ncbi_taxonomy_id/>
    </food>
    <food>
      <name>Red onion</name>
      <food_type>Type 1</food_type>
      <category/>
      <name_scientific/>
      <ncbi_taxonomy_id/>
    </food>
    <food>
      <name>Soft-necked garlic</name>
      <food_type>Type 1</food_type>
      <category>specific</category>
      <name_scientific>Allium sativum L. var. sativum</name_scientific>
      <ncbi_taxonomy_id>4682</ncbi_taxonomy_id>
    </food>
    <food>
      <name>Welsh onion</name>
      <food_type>Type 1</food_type>
      <category>specific</category>
      <name_scientific>Allium fistulosum</name_scientific>
      <ncbi_taxonomy_id>35875</ncbi_taxonomy_id>
    </food>
    <food>
      <name>Yellow wax bean</name>
      <food_type>Type 1</food_type>
      <category>specific</category>
      <name_scientific>Phaseolus vulgaris</name_scientific>
      <ncbi_taxonomy_id>3885</ncbi_taxonomy_id>
    </food>
  </foods>
  <flavors>
  </flavors>
  <enzymes>
    <enzyme>
      <name>Cathepsin D</name>
      <uniprot_id>P07339</uniprot_id>
      <uniprot_name/>
      <gene_name>CTSD</gene_name>
    </enzyme>
  </enzymes>
  <health_effects>
  </health_effects>
</compound>
