<?xml version="1.0" encoding="UTF-8"?>
<metabolite>
  <version>1.0</version>
  <creation_date>2016-09-30 22:41:53 UTC</creation_date>
  <update_date>2020-05-11 20:48:26 UTC</update_date>
  <accession>BMDB0001165</accession>
  <secondary_accessions>
    <accession>BMDB01165</accession>
  </secondary_accessions>
  <name>Keratan</name>
  <description/>
  <synonyms>
    <synonym>Keratan 6'-sulfate</synonym>
    <synonym>Keratan 6'-sulphate</synonym>
    <synonym>Keratan sulfate</synonym>
    <synonym>Keratan sulphate</synonym>
    <synonym>Kerato 6'-sulfate</synonym>
    <synonym>Kerato 6'-sulphate</synonym>
    <synonym>Kerato sulfate</synonym>
    <synonym>Kerato sulphate</synonym>
    <synonym>N-[(2S,3R,4S,6S)-2-{[(2S,3R,4S,5S,6R)-3,5-dihydroxy-2-{[(2R,3S,4R,5R,6S)-4-hydroxy-5-[(1-hydroxyethylidene)amino]-2-[(sulfooxy)methyl]-6-{[(2R,3R,4S,5S,6R)-2,3,5-trihydroxy-6-[(sulfooxy)methyl]oxan-4-yl]oxy}oxan-3-yl]oxy}-6-[(sulfooxy)methyl]oxan-4-yl]oxy}-4-hydroxy-6-[(sulfooxy)methyl]oxan-3-yl]ethanimidate</synonym>
    <synonym>N-[(2S,3R,4S,6S)-2-{[(2S,3R,4S,5S,6R)-3,5-dihydroxy-2-{[(2R,3S,4R,5R,6S)-4-hydroxy-5-[(1-hydroxyethylidene)amino]-2-[(sulphooxy)methyl]-6-{[(2R,3R,4S,5S,6R)-2,3,5-trihydroxy-6-[(sulphooxy)methyl]oxan-4-yl]oxy}oxan-3-yl]oxy}-6-[(sulphooxy)methyl]oxan-4-yl]oxy}-4-hydroxy-6-[(sulphooxy)methyl]oxan-3-yl]ethanimidate</synonym>
    <synonym>N-[(2S,3R,4S,6S)-2-{[(2S,3R,4S,5S,6R)-3,5-dihydroxy-2-{[(2R,3S,4R,5R,6S)-4-hydroxy-5-[(1-hydroxyethylidene)amino]-2-[(sulphooxy)methyl]-6-{[(2R,3R,4S,5S,6R)-2,3,5-trihydroxy-6-[(sulphooxy)methyl]oxan-4-yl]oxy}oxan-3-yl]oxy}-6-[(sulphooxy)methyl]oxan-4-yl]oxy}-4-hydroxy-6-[(sulphooxy)methyl]oxan-3-yl]ethanimidic acid</synonym>
    <synonym>Keratosulfate</synonym>
    <synonym>Sulfate, keratan</synonym>
  </synonyms>
  <chemical_formula>C28H48N2O32S4</chemical_formula>
  <average_molecular_weight>1052.935</average_molecular_weight>
  <monisotopic_moleculate_weight>1052.10730021</monisotopic_moleculate_weight>
  <iupac_name>{[(2S,4S,5R,6S)-5-acetamido-6-{[(2S,3R,4S,5S,6R)-2-{[(2R,3S,4R,5R,6S)-5-acetamido-4-hydroxy-2-[(sulfooxy)methyl]-6-{[(2R,3R,4S,5S,6R)-2,3,5-trihydroxy-6-[(sulfooxy)methyl]oxan-4-yl]oxy}oxan-3-yl]oxy}-3,5-dihydroxy-6-[(sulfooxy)methyl]oxan-4-yl]oxy}-4-hydroxyoxan-2-yl]methoxy}sulfonic acid</iupac_name>
  <traditional_iupac>[(2S,4S,5R,6S)-5-acetamido-6-{[(2S,3R,4S,5S,6R)-2-{[(2R,3S,4R,5R,6S)-5-acetamido-4-hydroxy-2-[(sulfooxy)methyl]-6-{[(2R,3R,4S,5S,6R)-2,3,5-trihydroxy-6-[(sulfooxy)methyl]oxan-4-yl]oxy}oxan-3-yl]oxy}-3,5-dihydroxy-6-[(sulfooxy)methyl]oxan-4-yl]oxy}-4-hydroxyoxan-2-yl]methoxysulfonic acid</traditional_iupac>
  <cas_registry_number>69992-87-6</cas_registry_number>
  <smiles>CC(=O)N[C@@H]1[C@@H](O)C[C@@H](COS(O)(=O)=O)O[C@H]1O[C@H]1[C@@H](O)[C@@H](COS(O)(=O)=O)O[C@@H](O[C@H]2[C@H](O)[C@@H](NC(C)=O)[C@H](O[C@@H]3[C@@H](O)[C@H](O)O[C@H](COS(O)(=O)=O)[C@@H]3O)O[C@@H]2COS(O)(=O)=O)[C@@H]1O</smiles>
  <inchi>InChI=1S/C28H48N2O32S4/c1-8(31)29-15-11(33)3-10(4-52-63(40,41)42)56-26(15)62-24-18(35)13(6-54-65(46,47)48)58-28(21(24)38)60-22-14(7-55-66(49,50)51)59-27(16(19(22)36)30-9(2)32)61-23-17(34)12(5-53-64(43,44)45)57-25(39)20(23)37/h10-28,33-39H,3-7H2,1-2H3,(H,29,31)(H,30,32)(H,40,41,42)(H,43,44,45)(H,46,47,48)(H,49,50,51)/t10-,11-,12+,13+,14+,15+,16+,17-,18-,19+,20+,21+,22+,23-,24-,25+,26-,27-,28-/m0/s1</inchi>
  <inchikey>KXCLCNHUUKTANI-RBIYJLQWSA-N</inchikey>
  <taxonomy>
    <description> belongs to the class of organic compounds known as oligosaccharide sulfates. These are carbohydrates containing between 3 and 9 sugar units, one of which bear one or more sulfate groups.</description>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organic oxygen compounds</super_class>
    <class>Organooxygen compounds</class>
    <sub_class>Carbohydrates and carbohydrate conjugates</sub_class>
    <direct_parent>Oligosaccharide sulfates</direct_parent>
    <alternative_parents>
      <alternative_parent>Acetals</alternative_parent>
      <alternative_parent>Acetamides</alternative_parent>
      <alternative_parent>Alkyl sulfates</alternative_parent>
      <alternative_parent>Carbonyl compounds</alternative_parent>
      <alternative_parent>Hemiacetals</alternative_parent>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>N-acyl-alpha-hexosamines</alternative_parent>
      <alternative_parent>O-glycosyl compounds</alternative_parent>
      <alternative_parent>Organic oxides</alternative_parent>
      <alternative_parent>Organonitrogen compounds</alternative_parent>
      <alternative_parent>Organopnictogen compounds</alternative_parent>
      <alternative_parent>Oxacyclic compounds</alternative_parent>
      <alternative_parent>Oxanes</alternative_parent>
      <alternative_parent>Polyols</alternative_parent>
      <alternative_parent>Secondary alcohols</alternative_parent>
      <alternative_parent>Secondary carboxylic acid amides</alternative_parent>
      <alternative_parent>Sulfuric acid monoesters</alternative_parent>
    </alternative_parents>
    <substituents>
      <substituent>Acetal</substituent>
      <substituent>Acetamide</substituent>
      <substituent>Alcohol</substituent>
      <substituent>Aliphatic heteromonocyclic compound</substituent>
      <substituent>Alkyl sulfate</substituent>
      <substituent>Carbonyl group</substituent>
      <substituent>Carboxamide group</substituent>
      <substituent>Carboxylic acid derivative</substituent>
      <substituent>Glycosyl compound</substituent>
      <substituent>Hemiacetal</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>N-acyl-alpha-hexosamine</substituent>
      <substituent>O-glycosyl compound</substituent>
      <substituent>Oligosaccharide sulfate</substituent>
      <substituent>Organic nitrogen compound</substituent>
      <substituent>Organic oxide</substituent>
      <substituent>Organic sulfuric acid or derivatives</substituent>
      <substituent>Organoheterocyclic compound</substituent>
      <substituent>Organonitrogen compound</substituent>
      <substituent>Organopnictogen compound</substituent>
      <substituent>Oxacycle</substituent>
      <substituent>Oxane</substituent>
      <substituent>Polyol</substituent>
      <substituent>Secondary alcohol</substituent>
      <substituent>Secondary carboxylic acid amide</substituent>
      <substituent>Sulfate-ester</substituent>
      <substituent>Sulfuric acid ester</substituent>
      <substituent>Sulfuric acid monoester</substituent>
    </substituents>
    <molecular_framework>Aliphatic heteromonocyclic compounds</molecular_framework>
    <external_descriptors>
    </external_descriptors>
  </taxonomy>
  <experimental_properties>
    <state>Solid</state>
  </experimental_properties>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>-2.46</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-1.63</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logp</kind>
      <value>-15</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_acidic</kind>
      <value>-2.6</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_basic</kind>
      <value>-4</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>iupac</kind>
      <value>{[(2S,4S,5R,6S)-5-acetamido-6-{[(2S,3R,4S,5S,6R)-2-{[(2R,3S,4R,5R,6S)-5-acetamido-4-hydroxy-2-[(sulfooxy)methyl]-6-{[(2R,3R,4S,5S,6R)-2,3,5-trihydroxy-6-[(sulfooxy)methyl]oxan-4-yl]oxy}oxan-3-yl]oxy}-3,5-dihydroxy-6-[(sulfooxy)methyl]oxan-4-yl]oxy}-4-hydroxyoxan-2-yl]methoxy}sulfonic acid</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>average_mass</kind>
      <value>1052.935</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>1052.10730021</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>smiles</kind>
      <value>CC(=O)N[C@@H]1[C@@H](O)C[C@@H](COS(O)(=O)=O)O[C@H]1O[C@H]1[C@@H](O)[C@@H](COS(O)(=O)=O)O[C@@H](O[C@H]2[C@H](O)[C@@H](NC(C)=O)[C@H](O[C@@H]3[C@@H](O)[C@H](O)O[C@H](COS(O)(=O)=O)[C@@H]3O)O[C@@H]2COS(O)(=O)=O)[C@@H]1O</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C28H48N2O32S4</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C28H48N2O32S4/c1-8(31)29-15-11(33)3-10(4-52-63(40,41)42)56-26(15)62-24-18(35)13(6-54-65(46,47)48)58-28(21(24)38)60-22-14(7-55-66(49,50)51)59-27(16(19(22)36)30-9(2)32)61-23-17(34)12(5-53-64(43,44)45)57-25(39)20(23)37/h10-28,33-39H,3-7H2,1-2H3,(H,29,31)(H,30,32)(H,40,41,42)(H,43,44,45)(H,46,47,48)(H,49,50,51)/t10-,11-,12+,13+,14+,15+,16+,17-,18-,19+,20+,21+,22+,23-,24-,25+,26-,27-,28-/m0/s1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>KXCLCNHUUKTANI-RBIYJLQWSA-N</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polar_surface_area</kind>
      <value>518.82</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>refractivity</kind>
      <value>194.24</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polarizability</kind>
      <value>92.22</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rotatable_bond_count</kind>
      <value>20</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>acceptor_count</kind>
      <value>28</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>donor_count</kind>
      <value>13</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>physiological_charge</kind>
      <value>-4</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formal_charge</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>number_of_rings</kind>
      <value>4</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>bioavailability</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rule_of_five</kind>
      <value>Yes</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>ghose_filter</kind>
      <value>Yes</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>veber_rule</kind>
      <value>Yes</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mddr_like_rule</kind>
      <value>Yes</value>
      <source>ChemAxon</source>
    </property>
  </predicted_properties>
  <pathways>
  </pathways>
  <spectra>
    <spectrum>
      <type>Specdb::EiMs</type>
      <spectrum_id>4813</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>295486</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>295487</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>295488</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>336493</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>336494</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>336495</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2283841</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2283842</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2283843</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3081240</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3081241</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>3081242</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21322</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21323</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21324</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21325</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21326</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21327</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21328</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21329</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21330</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21331</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21332</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21333</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21334</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21335</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21336</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21337</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21338</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21339</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21340</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>21341</spectrum_id>
    </spectrum>
  </spectra>
  <normal_concentrations>
    <concentration>
      <biospecimen>Cartilage</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <references>
        <reference>
          <reference_text>Wishart DS, Feunang YD, Marcu A, Guo AC, Liang K, Vazquez-Fresno R, Sajed T, Johnson D, Li C, Karu N, Sayeeda Z, Lo E, Assempour N, Berjanskii M, Singhal S, Arndt D, Liang Y, Badran H, Grant J, Serra-Cayuela A, Liu Y, Mandal R, Neveu V, Pon A, Knox C, Wilson M, Manach C, Scalbert A: HMDB 4.0: the human metabolome database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D608-D617. doi: 10.1093/nar/gkx1089.</reference_text>
          <pubmed_id>29140435</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Epidermis</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <references>
        <reference>
          <reference_text>Wishart DS, Feunang YD, Marcu A, Guo AC, Liang K, Vazquez-Fresno R, Sajed T, Johnson D, Li C, Karu N, Sayeeda Z, Lo E, Assempour N, Berjanskii M, Singhal S, Arndt D, Liang Y, Badran H, Grant J, Serra-Cayuela A, Liu Y, Mandal R, Neveu V, Pon A, Knox C, Wilson M, Manach C, Scalbert A: HMDB 4.0: the human metabolome database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D608-D617. doi: 10.1093/nar/gkx1089.</reference_text>
          <pubmed_id>29140435</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Fibroblasts</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <references>
        <reference>
          <reference_text>Wishart DS, Feunang YD, Marcu A, Guo AC, Liang K, Vazquez-Fresno R, Sajed T, Johnson D, Li C, Karu N, Sayeeda Z, Lo E, Assempour N, Berjanskii M, Singhal S, Arndt D, Liang Y, Badran H, Grant J, Serra-Cayuela A, Liu Y, Mandal R, Neveu V, Pon A, Knox C, Wilson M, Manach C, Scalbert A: HMDB 4.0: the human metabolome database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D608-D617. doi: 10.1093/nar/gkx1089.</reference_text>
          <pubmed_id>29140435</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Intestine</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <references>
        <reference>
          <reference_text>Wishart DS, Feunang YD, Marcu A, Guo AC, Liang K, Vazquez-Fresno R, Sajed T, Johnson D, Li C, Karu N, Sayeeda Z, Lo E, Assempour N, Berjanskii M, Singhal S, Arndt D, Liang Y, Badran H, Grant J, Serra-Cayuela A, Liu Y, Mandal R, Neveu V, Pon A, Knox C, Wilson M, Manach C, Scalbert A: HMDB 4.0: the human metabolome database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D608-D617. doi: 10.1093/nar/gkx1089.</reference_text>
          <pubmed_id>29140435</pubmed_id>
        </reference>
      </references>
    </concentration>
    <concentration>
      <biospecimen>Prostate Tissue</biospecimen>
      <concentration_value/>
      <concentration_units/>
      <references>
        <reference>
          <reference_text>Wishart DS, Feunang YD, Marcu A, Guo AC, Liang K, Vazquez-Fresno R, Sajed T, Johnson D, Li C, Karu N, Sayeeda Z, Lo E, Assempour N, Berjanskii M, Singhal S, Arndt D, Liang Y, Badran H, Grant J, Serra-Cayuela A, Liu Y, Mandal R, Neveu V, Pon A, Knox C, Wilson M, Manach C, Scalbert A: HMDB 4.0: the human metabolome database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D608-D617. doi: 10.1093/nar/gkx1089.</reference_text>
          <pubmed_id>29140435</pubmed_id>
        </reference>
      </references>
    </concentration>
  </normal_concentrations>
  <drugbank_id/>
  <foodb_id>FDB022459</foodb_id>
  <kegg_id>C00573</kegg_id>
  <chemspider_id>394000</chemspider_id>
  <pubchem_compound_id>446715</pubchem_compound_id>
  <chebi_id/>
  <pdbe_id/>
  <meta_cyc_id/>
  <phenol_explorer_compound_id/>
  <knapsack_id/>
  <bigg_id/>
  <wikipedia_id/>
  <metlin_id/>
  <synthesis_reference/>
  <general_references>
  </general_references>
  <protein_associations>
    <protein>
      <protein_accession>BMDBP02245</protein_accession>
      <name>Fibromodulin</name>
      <uniprot_id>P13605</uniprot_id>
      <gene_name>FMOD</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP02246</protein_accession>
      <name>Keratocan</name>
      <uniprot_id>O62702</uniprot_id>
      <gene_name>KERA</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
    <protein>
      <protein_accession>BMDBP02247</protein_accession>
      <name>Neuroendocrine secretory protein 55</name>
      <uniprot_id>O18979</uniprot_id>
      <gene_name>GNAS</gene_name>
      <protein_type>Enzyme</protein_type>
    </protein>
  </protein_associations>
</metabolite>
