6z1n

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Current revision (13:40, 24 January 2024) (edit) (undo)
 
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==Structure of the human heterotetrameric cis-prenyltransferase complex==
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<StructureSection load='6z1n' size='340' side='right'caption='[[6z1n]]' scene=''>
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<StructureSection load='6z1n' size='340' side='right'caption='[[6z1n]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id= OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol= FirstGlance]. <br>
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<table><tr><td colspan='2'>[[6z1n]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6Z1N OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6Z1N FirstGlance]. <br>
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</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6z1n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6z1n OCA], [http://pdbe.org/6z1n PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6z1n RCSB], [http://www.ebi.ac.uk/pdbsum/6z1n PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6z1n ProSAT]</span></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FPP:FARNESYL+DIPHOSPHATE'>FPP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6z1n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6z1n OCA], [https://pdbe.org/6z1n PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6z1n RCSB], [https://www.ebi.ac.uk/pdbsum/6z1n PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6z1n ProSAT]</span></td></tr>
</table>
</table>
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== Disease ==
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[https://www.uniprot.org/uniprot/DHDDS_HUMAN DHDDS_HUMAN] Non-specific early-onset epileptic encephalopathy;Retinitis pigmentosa. The disease is caused by variants affecting the gene represented in this entry. The disease may be caused by variants affecting the gene represented in this entry.
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== Function ==
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[https://www.uniprot.org/uniprot/DHDDS_HUMAN DHDDS_HUMAN] With NUS1, forms the dehydrodolichyl diphosphate synthase (DDS) complex, an essential component of the dolichol monophosphate (Dol-P) biosynthetic machinery. Both subunits contribute to enzymatic activity, i.e. condensation of multiple copies of isopentenyl pyrophosphate (IPP) to farnesyl pyrophosphate (FPP) to produce dehydrodolichyl diphosphate (Dedol-PP), a precursor of dolichol phosphate which is utilized as a sugar carrier in protein glycosylation in the endoplasmic reticulum (ER) (PubMed:25066056, PubMed:28842490, PubMed:32817466). Synthesizes long-chain polyprenols, mostly of C95 and C100 chain length (PubMed:32817466). Regulates the glycosylation and stability of nascent NPC2, thereby promoting trafficking of LDL-derived cholesterol (PubMed:21572394).<ref>PMID:21572394</ref> <ref>PMID:25066056</ref> <ref>PMID:28842490</ref> <ref>PMID:32817466</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The human cis-prenyltransferase (hcis-PT) is an enzymatic complex essential for protein N-glycosylation. Synthesizing the precursor of the glycosyl carrier dolichol-phosphate, mutations in hcis-PT cause severe human diseases. Here, we reveal that hcis-PT exhibits a heterotetrameric assembly in solution, consisting of two catalytic dehydrodolichyl diphosphate synthase (DHDDS) and inactive Nogo-B receptor (NgBR) heterodimers. Importantly, the 2.3 A crystal structure reveals that the tetramer assembles via the DHDDS C-termini as a dimer-of-heterodimers. Moreover, the distal C-terminus of NgBR transverses across the interface with DHDDS, directly participating in active-site formation and the functional coupling between the subunits. Finally, we explored the functional consequences of disease mutations clustered around the active-site, and in combination with molecular dynamics simulations, we propose a mechanism for hcis-PT dysfunction in retinitis pigmentosa. Together, our structure of the hcis-PT complex unveils the dolichol synthesis mechanism and its perturbation in disease.
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Structural basis of heterotetrameric assembly and disease mutations in the human cis-prenyltransferase complex.,Bar-El ML, Vankova P, Yeheskel A, Simhaev L, Engel H, Man P, Haitin Y, Giladi M Nat Commun. 2020 Oct 19;11(1):5273. doi: 10.1038/s41467-020-18970-z. PMID:33077723<ref>PMID:33077723</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 6z1n" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Z-disk]]
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[[Category: Giladi M]]
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[[Category: Haitin Y]]
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[[Category: Lisnyansky Bar-El M]]

Current revision

Structure of the human heterotetrameric cis-prenyltransferase complex

PDB ID 6z1n

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