This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

4q4f

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Current revision

Crystal structure of LIMP-2 (space group C2)

Structural highlights

4q4f is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.8Å
Ligands:	, , , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

SCRB2_HUMAN Unverricht-Lundborg disease;Gaucher disease type 1;Action myoclonus - renal failure syndrome. The disease is caused by mutations affecting the gene represented in this entry. Genetic variants in SCARB2 can act as modifier of the phenotypic expression and severity of Gaucher disease.

Function

SCRB2_HUMAN Acts as a lysosomal receptor for glucosylceramidase (GBA) targeting.^[1]

Publication Abstract from PubMed

The integral membrane protein LIMP-2 has been a paradigm for mannose 6-phosphate receptor (MPR) independent lysosomal targeting, binding to beta-glucocerebrosidase (beta-GCase) and directing it to the lysosome, before dissociating in the late-endosomal/lysosomal compartments. Here we report structural results illuminating how LIMP-2 binds and releases beta-GCase according to changes in pH, via a histidine trigger, and suggesting that LIMP-2 localizes the ceramide portion of the substrate adjacent to the beta-GCase catalytic site. Remarkably, we find that LIMP-2 bears P-Man9GlcNAc2 covalently attached to residue N325, and that it binds MPR, via mannose 6-phosphate, with a similar affinity to that observed between LIMP-2 and beta-GCase. The binding sites for beta-GCase and the MPR are functionally separate, so that a stable ternary complex can be formed. By fluorescence lifetime imaging microscopy, we also demonstrate that LIMP-2 interacts with MPR in living cells. These results revise the accepted view of LIMP-2-beta-GCase lysosomal targeting.

Lysosome sorting of beta-glucocerebrosidase by LIMP-2 is targeted by the mannose 6-phosphate receptor.,Zhao Y, Ren J, Padilla-Parra S, Fry EE, Stuart DI Nat Commun. 2014 Jul 14;5:4321. doi: 10.1038/ncomms5321. PMID:25027712^[2]

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

References

↑ Reczek D, Schwake M, Schroder J, Hughes H, Blanz J, Jin X, Brondyk W, Van Patten S, Edmunds T, Saftig P. LIMP-2 is a receptor for lysosomal mannose-6-phosphate-independent targeting of beta-glucocerebrosidase. Cell. 2007 Nov 16;131(4):770-83. PMID:18022370 doi:http://dx.doi.org/10.1016/j.cell.2007.10.018
↑ Zhao Y, Ren J, Padilla-Parra S, Fry EE, Stuart DI. Lysosome sorting of beta-glucocerebrosidase by LIMP-2 is targeted by the mannose 6-phosphate receptor. Nat Commun. 2014 Jul 14;5:4321. doi: 10.1038/ncomms5321. PMID:25027712 doi:http://dx.doi.org/10.1038/ncomms5321

1 Structural highlights
2 Disease
3 Function
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/4q4f"

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[4q4f]] is a 1 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=4Q4F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4Q4F FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=M6D:6-O-PHOSPHONO-BETA-D-MANNOPYRANOSE'>M6D</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=M6D:6-O-PHOSPHONO-BETA-D-MANNOPYRANOSE'>M6D</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4q4f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4q4f OCA], [https://pdbe.org/4q4f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4q4f RCSB], [https://www.ebi.ac.uk/pdbsum/4q4f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4q4f ProSAT]</span></td></tr>
 </table>

4q4f

From Proteopedia

Current revision

Crystal structure of LIMP-2 (space group C2)

Structural highlights

Disease

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox