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2i74

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Revision as of 08:24, 18 October 2017

Crystal structure of mouse Peptide N-Glycanase C-terminal domain in complex with mannopentaose

Structural highlights

2i74 is a 2 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	2g9f, 2g9g
Gene:	Ngly1 (LK3 transgenic mice)
Activity:	Peptide-N(4)-(N-acetyl-beta-glucosaminyl)asparagine amidase, with EC number 3.5.1.52
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[NGLY1_MOUSE] Specifically deglycosylates the denatured form of N-linked glycoproteins in the cytoplasm and assists their proteasome-mediated degradation. Cleaves the beta-aspartyl-glucosamine (GlcNAc) of the glycan and the amide side chain of Asn, converting Asn to Asp. Prefers proteins containing high-mannose over those bearing complex type oligosaccharides. Can recognize misfolded proteins in the endoplasmic reticulum that are exported to the cytosol to be destroyed and deglycosylate them, while it has no activity toward native proteins. Deglycosylation is a prerequisite for subsequent proteasome-mediated degradation of some, but not all, misfolded glycoproteins.^[1] ^[2] ^[3]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The inability of certain N-linked glycoproteins to adopt their native conformation in the endoplasmic reticulum (ER) leads to their retrotranslocation into the cytosol and subsequent degradation by the proteasome. In this pathway the cytosolic peptide-N-glycanase (PNGase) cleaves the N-linked glycan chains off denatured glycoproteins. PNGase is highly conserved in eukaryotes and plays an important role in ER-associated protein degradation. In higher eukaryotes, PNGase has an N-terminal and a C-terminal extension in addition to its central catalytic domain, which is structurally and functionally related to transglutaminases. Although the N-terminal domain of PNGase is involved in protein-protein interactions, the function of the C-terminal domain has not previously been characterized. Here, we describe biophysical, biochemical, and crystallographic studies of the mouse PNGase C-terminal domain, including visualization of a complex between this domain and mannopentaose. These studies demonstrate that the C-terminal domain binds to the mannose moieties of N-linked oligosaccharide chains, and we further show that it enhances the activity of the mouse PNGase core domain, presumably by increasing the affinity of mouse PNGase for the glycan chains of misfolded glycoproteins.

Structural and biochemical studies of the C-terminal domain of mouse peptide-N-glycanase identify it as a mannose-binding module.,Zhou X, Zhao G, Truglio JJ, Wang L, Li G, Lennarz WJ, Schindelin H Proc Natl Acad Sci U S A. 2006 Nov 14;103(46):17214-9. Epub 2006 Nov 6. PMID:17088551^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Park H, Suzuki T, Lennarz WJ. Identification of proteins that interact with mammalian peptide:N-glycanase and implicate this hydrolase in the proteasome-dependent pathway for protein degradation. Proc Natl Acad Sci U S A. 2001 Sep 25;98(20):11163-8. Epub 2001 Sep 18. PMID:11562482 doi:http://dx.doi.org/10.1073/pnas.201393498
↑ Hirsch C, Blom D, Ploegh HL. A role for N-glycanase in the cytosolic turnover of glycoproteins. EMBO J. 2003 Mar 3;22(5):1036-46. PMID:12606569 doi:http://dx.doi.org/10.1093/emboj/cdg107
↑ Katiyar S, Li G, Lennarz WJ. A complex between peptide:N-glycanase and two proteasome-linked proteins suggests a mechanism for the degradation of misfolded glycoproteins. Proc Natl Acad Sci U S A. 2004 Sep 21;101(38):13774-9. Epub 2004 Sep 9. PMID:15358861 doi:http://dx.doi.org/10.1073/pnas.0405663101
↑ Zhou X, Zhao G, Truglio JJ, Wang L, Li G, Lennarz WJ, Schindelin H. Structural and biochemical studies of the C-terminal domain of mouse peptide-N-glycanase identify it as a mannose-binding module. Proc Natl Acad Sci U S A. 2006 Nov 14;103(46):17214-9. Epub 2006 Nov 6. PMID:17088551

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2i74"

@@ Line 1: / Line 1: @@
 ==Crystal structure of mouse Peptide N-Glycanase C-terminal domain in complex with mannopentaose==
 <StructureSection load='2i74' size='340' side='right' caption='[[2i74]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
@@ Line 7: / Line 8: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Ngly1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Peptide-N(4)-(N-acetyl-beta-glucosaminyl)asparagine_amidase Peptide-N(4)-(N-acetyl-beta-glucosaminyl)asparagine amidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.1.52 3.5.1.52] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2i74 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2i74 OCA], [http://pdbe.org/2i74 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2i74 RCSB], [http://www.ebi.ac.uk/pdbsum/2i74 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2i74 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2i74 OCA], [http://pdbe.org/2i74 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2i74 RCSB], [http://www.ebi.ac.uk/pdbsum/2i74 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2i74 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 30: / Line 31: @@
 </div>
 <div class="pdbe-citations 2i74" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Peptide N-glycanase|Peptide N-glycanase]]
 == References ==
 <references/>

2i74

From Proteopedia

Revision as of 08:24, 18 October 2017

Crystal structure of mouse Peptide N-Glycanase C-terminal domain in complex with mannopentaose

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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