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<entry dataset="TrEMBL" created="2003-10-01" modified="2026-09-02" version="54" xmlns="http://uniprot.org/uniprot">
  <accession>Q7YZT9</accession>
  <name>Q7YZT9_9EUKA</name>
  <protein>
    <recommendedName>
      <fullName evidence="3 9">Cellulase</fullName>
      <ecNumber evidence="3 9">3.2.1.4</ecNumber>
    </recommendedName>
  </protein>
  <gene>
    <name evidence="11" type="primary">fm2</name>
  </gene>
  <organism evidence="11">
    <name type="scientific">Mastotermes darwiniensis hindgut symbiont sp</name>
    <dbReference type="NCBI Taxonomy" id="201404"/>
    <lineage>
      <taxon>Eukaryota</taxon>
      <taxon>Metamonada</taxon>
      <taxon>Parabasalia</taxon>
    </lineage>
  </organism>
  <reference evidence="11" key="1">
    <citation type="journal article" date="2003" name="Eukaryot. Cell" volume="2" first="1091" last="1098">
      <title>Termite gut symbiotic archaezoa are becoming living metabolic fossils.</title>
      <authorList>
        <person name="Li L."/>
        <person name="Frohlich J."/>
        <person name="Pfeiffer P."/>
        <person name="Konig H."/>
      </authorList>
      <dbReference type="PubMed" id="14555492"/>
      <dbReference type="DOI" id="10.1128/EC.2.5.1091-1098.2003"/>
    </citation>
    <scope>NUCLEOTIDE SEQUENCE</scope>
  </reference>
  <comment type="catalytic activity">
    <reaction evidence="1 9">
      <text>Endohydrolysis of (1-&gt;4)-beta-D-glucosidic linkages in cellulose, lichenin and cereal beta-D-glucans.</text>
      <dbReference type="EC" id="3.2.1.4"/>
    </reaction>
  </comment>
  <comment type="similarity">
    <text evidence="2">Belongs to the glycosyl hydrolase 45 (cellulase K) family.</text>
  </comment>
  <dbReference type="EC" id="3.2.1.4" evidence="3 9"/>
  <dbReference type="EMBL" id="AJ494858">
    <property type="protein sequence ID" value="CAD39198.1"/>
    <property type="molecule type" value="mRNA"/>
  </dbReference>
  <dbReference type="AlphaFoldDB" id="Q7YZT9"/>
  <dbReference type="CAZy" id="GH45">
    <property type="family name" value="Glycoside Hydrolase Family 45"/>
  </dbReference>
  <dbReference type="GO" id="GO:0008810">
    <property type="term" value="F:cellulase activity"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="UniProtKB-EC"/>
  </dbReference>
  <dbReference type="GO" id="GO:0005975">
    <property type="term" value="P:carbohydrate metabolic process"/>
    <property type="evidence" value="ECO:0000501"/>
    <property type="project" value="InterPro"/>
  </dbReference>
  <dbReference type="Gene3D" id="2.40.40.10">
    <property type="entry name" value="RlpA-like domain"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR052288">
    <property type="entry name" value="GH45_Enzymes"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR000334">
    <property type="entry name" value="Glyco_hydro_45"/>
  </dbReference>
  <dbReference type="InterPro" id="IPR036908">
    <property type="entry name" value="RlpA-like_sf"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR39730">
    <property type="entry name" value="ENDOGLUCANASE 1"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PANTHER" id="PTHR39730:SF1">
    <property type="entry name" value="ENDOGLUCANASE 1"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="Pfam" id="PF02015">
    <property type="entry name" value="Glyco_hydro_45"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="SUPFAM" id="SSF50685">
    <property type="entry name" value="Barwin-like endoglucanases"/>
    <property type="match status" value="1"/>
  </dbReference>
  <dbReference type="PROSITE" id="PS01140">
    <property type="entry name" value="GLYCOSYL_HYDROL_F45"/>
    <property type="match status" value="1"/>
  </dbReference>
  <proteinExistence type="evidence at transcript level"/>
  <keyword evidence="6" id="KW-0119">Carbohydrate metabolism</keyword>
  <keyword evidence="5" id="KW-0136">Cellulose degradation</keyword>
  <keyword evidence="7 11" id="KW-0326">Glycosidase</keyword>
  <keyword evidence="4 11" id="KW-0378">Hydrolase</keyword>
  <keyword evidence="8" id="KW-0624">Polysaccharide degradation</keyword>
  <feature type="domain" description="Glycosyl hydrolases family 45 active site" evidence="10">
    <location>
      <begin position="20"/>
      <end position="31"/>
    </location>
  </feature>
  <feature type="active site" description="Nucleophile" evidence="9">
    <location>
      <position position="25"/>
    </location>
  </feature>
  <evidence type="ECO:0000256" key="1">
    <source>
      <dbReference type="ARBA" id="ARBA00000966"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="2">
    <source>
      <dbReference type="ARBA" id="ARBA00007793"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="3">
    <source>
      <dbReference type="ARBA" id="ARBA00012601"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="4">
    <source>
      <dbReference type="ARBA" id="ARBA00022801"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="5">
    <source>
      <dbReference type="ARBA" id="ARBA00023001"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="6">
    <source>
      <dbReference type="ARBA" id="ARBA00023277"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="7">
    <source>
      <dbReference type="ARBA" id="ARBA00023295"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="8">
    <source>
      <dbReference type="ARBA" id="ARBA00023326"/>
    </source>
  </evidence>
  <evidence type="ECO:0000256" key="9">
    <source>
      <dbReference type="PROSITE-ProRule" id="PRU10069"/>
    </source>
  </evidence>
  <evidence type="ECO:0000259" key="10">
    <source>
      <dbReference type="PROSITE" id="PS01140"/>
    </source>
  </evidence>
  <evidence type="ECO:0000313" key="11">
    <source>
      <dbReference type="EMBL" id="CAD39198.1"/>
    </source>
  </evidence>
  <sequence length="220" mass="23400" checksum="1E4CA41B7E0F973F" modified="2003-10-01" version="1">MIVVFVIGALCKDYSGSGKTTRYWDCCKPSCSWSKKAQVSHVVNSCTASGQHDTTVDLKSGCDGGPSYVCVDQAPWAVNSSYFMGTAAAALSGGSESDLCCRCFELTFTSGQSNGKKMLVQITNTGSDLSGNQFDLLIPGGGVGIFDGCSRQYPGGNYDWGQRYGGVTSKAGCAKIPAELKAGCEFRFDYIGDNPSVSFKSVHCPDTITSKTNCRRNDDQ</sequence>
</entry>
<copyright>
Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms Distributed under the Creative Commons Attribution (CC BY 4.0) License
</copyright>
</uniprot>