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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">MBTPS1</span></h1>
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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="de" dir="ltr"><div class="mw-content-ltr mw-parser-output" lang="de" dir="ltr"><table class="wikitable hintergrundfarbe-basis infobox float-right" id="Vorlage_Infobox_Protein_" style="font-size:90%; margin-top:0; width:350px;" summary="Infobox Protein">
<tbody><tr>
<th colspan="3" style="background:#90EE90; color:#202122;">MBTPS1
</th></tr>
<tr>
<th colspan="3" style="background:#90EE90; color:#202122;;">Eigenschaften des menschlichen Proteins
</th></tr>
<tr>
<td><a href="Molare_Masse" title="Molare Masse">Masse</a>/Länge <a href="Prim%C3%A4rstruktur" title="Primärstruktur">Primärstruktur</a>
</td>
<td colspan="2" style="text-align:center;">866 Aminosäuren
</td></tr>
<tr>
<td><a href="Koenzym" class="mw-redirect" title="Koenzym">Kofaktor</a>
</td>
<td colspan="2" style="text-align:center;">Ca<sup>2+</sup>
</td></tr>
<tr>
<th colspan="3" style="background:#90EE90; color:#202122;">Bezeichner
</th></tr>
<tr>
<td><a href="Human_Genome_Organisation" title="Human Genome Organisation">Gen-Namen</a>
</td>
<td colspan="2" class="" style="text-align:center;"><i><a rel="nofollow" class="external text" href="https://www.genenames.org/tools/search/#!/all?query=15456">MBPTS1</a></i>, S1P, KIAA0091, SKI-1, PCSK8
</td></tr>
<tr>
<td>Externe IDs
</td>
<td colspan="2" class="">
<ul><li><a href="Online_Mendelian_Inheritance_in_Man" title="Online Mendelian Inheritance in Man">OMIM</a>: <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/omim/603355">603355</a></li>
<li><a href="UniProt" title="UniProt">UniProt</a> <a rel="nofollow" class="external text" href="https://www.uniprot.org/uniprotkb/Q14703">Q14703</a></li>
<li><a href="Mouse_Genome_Informatics" title="Mouse Genome Informatics">MGI</a>: <a rel="nofollow" class="external text" href="https://www.informatics.jax.org/marker/MGI:1927235">1927235</a></li></ul>
</td></tr>
<tr>
<th colspan="3" style="background:#90EE90; color:#202122;">Enzymklassifikation
</th></tr>
<tr>
<td><a href="EC-Nummer" title="EC-Nummer">EC, Kategorie</a>
</td>
<td colspan="2" class="" style="text-align:center;"><a rel="nofollow" class="external text" href="https://www.brenda-enzymes.org/enzyme.php?ecno=3.4.21.112">3.4.21.112</a>, <a href="Serinprotease" class="mw-redirect" title="Serinprotease">Serinprotease</a>
</td></tr>
<tr>
<td><a href="MEROPS" title="MEROPS">MEROPS</a>
</td>
<td colspan="2" class="" style="text-align:center;"><a rel="nofollow" class="external text" href="https://www.ebi.ac.uk/merops/cgi-bin/pepsum?id=S08.063">S08.063</a>
</td></tr>
<tr>
<td>Substrat
</td>
<td colspan="2" style="text-align:center;">SREBP-SCAP
</td></tr>
<tr>
<td>Produkte
</td>
<td colspan="2" style="text-align:center;">SREBP-TF
</td></tr>
<tr>
<th colspan="3" style="background:#90EE90; color:#202122;">Vorkommen
</th></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;">Homologie-Familie
</td>
<td colspan="2" style="text-align:center;"><a rel="nofollow" class="external text" href="http://hogenom.univ-lyon1.fr/query_sequence?seq=Q14703">CG6443 PA</a>
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;">Übergeordnetes <a href="Taxon" title="Taxon">Taxon</a>
</td>
<td colspan="2" style="text-align:center;"><a href="Eukaryoten" title="Eukaryoten">Eukaryoten</a>
</td></tr>
<tr>
<td colspan="3" style="background:#90EE90; color:#202122; text-align:center;"><a href="Homologie_(Genetik)#Homologie_zwischen_verdoppelten_oder_fremden_Genen" title="Homologie (Genetik)">Orthologe</a>
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;">
</td>
<td style="background:#C3FDB8; color:#202122; text-align:center;">Mensch
</td>
<td style="background:#C3FDB8; color:#202122; text-align:center;">Hausmaus
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;"><a href="Entrez_Gene" title="Entrez Gene">Entrez</a>
</td>
<td><span class=""><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene&cmd=retrieve&dopt=default&list_uids=8720&rn=1">8720</a></span>
</td>
<td><span class=""><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene&cmd=retrieve&dopt=default&list_uids=56453&rn=1">56453</a></span>
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;"><a href="Ensembl" title="Ensembl">Ensembl</a>
</td>
<td><span class=""><small><small><a rel="nofollow" class="external text" href="http://www.ensembl.org/Homo_sapiens/geneview?gene=ENSG00000140943;db=core">ENSG00000140943</a></small></small></span>
</td>
<td><span class=""><small><small><a rel="nofollow" class="external text" href="http://www.ensembl.org/Mus_musculus/geneview?gene=ENSMUSG00000031835;db=core">ENSMUSG00000031835</a></small></small></span>
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;"><a href="UniProt" title="UniProt">UniProt</a>
</td>
<td><a rel="nofollow" class="external text" href="https://www.uniprot.org/uniprotkb/Q14703">Q14703</a>
</td>
<td><a rel="nofollow" class="external text" href="https://www.uniprot.org/uniprotkb/Q9WTZ2">Q9WTZ2</a>
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;"><a href="National_Center_for_Biotechnology_Information" title="National Center for Biotechnology Information">Refseq</a> (mRNA)
</td>
<td><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=NM_003791">NM_003791</a>
</td>
<td><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=NM_001167910">NM_001167910</a>
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;"><a href="National_Center_for_Biotechnology_Information" title="National Center for Biotechnology Information">Refseq</a> (Protein)
</td>
<td><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=NP_003782">NP_003782</a>
</td>
<td><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=NP_001161382">NP_001161382</a>
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;"><a href="Genlocus" title="Genlocus">Genlocus</a>
</td>
<td><span class=""> <a rel="nofollow" class="external text" href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human?db=hg38&position=chr16:84053761-84116906">Chr 16: 84.05 – 84.12 Mb</a> </span>
</td>
<td><span class=""> <a rel="nofollow" class="external text" href="https://genome.ucsc.edu/cgi-bin/hgTracks?db=mm10&position=chr8:119508156-119558761">Chr 8: 119.51 – 119.56 Mb</a> </span>
</td></tr>
<tr>
<td style="background:#C3FDB8; color:#202122;"><a href="PubMed" title="PubMed">PubMed</a>-Suche
</td>
<td><span class=""><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/sites/entrez?db=gene&cmd=Link&LinkName=gene_pubmed&from_uid=8720">8720</a></span>
</td>
<td><span class=""><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/sites/entrez?db=gene&cmd=Link&LinkName=gene_pubmed&from_uid=56453">56453</a></span>
<p><span class="editoronly" style="display:none;"></span>
</p>
</td></tr></tbody></table><p><span class="editoronly" style="display:none;"></span>
</p><p><b>MBTPS1</b> (Synonyme: S1P, Site-1 protease; weitere in <a href="IHOP_(Datenbank)" title="IHOP (Datenbank)">iHOP</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>) steht für <i>membrane bound transcription factor protease, site 1</i>. MBTPS1 ist eine <a href="Protease" class="mw-redirect" title="Protease">Protease</a>, die im <a href="Cholesterin" title="Cholesterin">Cholesterinhaushalt</a> von menschlichen und vielen anderen <a href="Eukaryoten" title="Eukaryoten">eukaryotischen</a> Zellen eine Rolle spielt. Sie gehört zu der <a href="Subtilisin" title="Subtilisin">Subtilisin</a>-Familie der <a href="Serinproteasen" title="Serinproteasen">Serinproteasen</a>.
</p>
<div class="mw-heading mw-heading2"><h2 id="Funktion">Funktion</h2></div>
<p>Dieses <a href="Enzym" title="Enzym">Enzym</a> spaltet in menschlichen Zellen die <a href="SREBP" title="SREBP">SREBPs</a> (sterol regulatory element binding protein) <a href="Proteolyse" title="Proteolyse">proteolytisch</a> und aktiviert sie dadurch zu <a href="Transkriptionsfaktor" title="Transkriptionsfaktor">Transkriptionsfaktoren</a>, die dann im <a href="Zellkern" title="Zellkern">Zellkern</a> die Transkriptionsrate mehrerer Gene steigern (u. a. besitzen die Gene der <a href="HMG-CoA-Reduktase" title="HMG-CoA-Reduktase">HMG-CoA-Reduktase</a>, <a href="HMG-CoA-Synthase" class="mw-redirect" title="HMG-CoA-Synthase">HMG-CoA-Synthase</a>, Prenyltransferase und des <a href="LDL-Rezeptor" title="LDL-Rezeptor">LDL-Rezeptors</a> in ihrer <a href="Promotor_(Genetik)" title="Promotor (Genetik)">Promotorregion</a> das SRE (sterol regulatory element), an welches die aktivierten SREBPs binden können). Dies geschieht nur, wenn SREBP vorher SCAP (SREBP cleavage activating protein) gebunden hat; diese Bindung löst sich, wenn SCAP Cholesterin bindet. Dadurch entsteht ein <a href="R%C3%BCckkopplung" title="Rückkopplung">Feedback</a>-Mechanismus, der etwa wie folgt beschrieben werden kann: Wenn wenig Cholesterin in der Zelle vorhanden ist, wird wie oben beschrieben die Transkription mehrerer Gene gesteigert, die zur Cholesterinsynthese der Zelle nötig sind, und zwar so lange, bis das gebildete Cholesterin an SCAP bindet. Es gibt noch viele andere <a href="R%C3%BCckkopplung" title="Rückkopplung">Rückkopplungen</a>, über die Cholesterin seine Bildung hemmt, so wird die HMG-CoA-Reductase z. B. auch direkt gehemmt.
</p>
<div class="mw-heading mw-heading2"><h2 id="Weblinks">Weblinks</h2></div>
<ul><li><a rel="nofollow" class="external text" href="https://omim.org/entry/603355"><i>MBTPS1.</i></a> In: <i><span lang="en"><a href="Online_Mendelian_Inheritance_in_Man" title="Online Mendelian Inheritance in Man">Online Mendelian Inheritance in Man</a></span>.</i> (englisch)<span class="editoronly" style="display:none;"></span>.</li></ul>
<div class="mw-heading mw-heading2"><h2 id="Einzelnachweise">Einzelnachweise</h2></div>
<ol class="references">
<li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><span class="cite"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20070927093641/http://www.ihop-net.org/UniPub/iHOP/gismo/94084.html?ORGANISM_ID=1"><i>MBTPS1.</i></a> In: <i><a href="IHOP_(Datenbank)" title="IHOP (Datenbank)">iHOP</a>.</i> Archiviert vom <style data-mw-deduplicate="TemplateStyles:r250917974">
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