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5uwg

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Revision as of 17:12, 11 December 2019

The crystal structure of Fz4-CRD in complex with palmitoleic acid

Structural highlights

5uwg is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	5cm4, 5cl1
Gene:	FZD4 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[FZD4_HUMAN] Retinopathy of prematurity;Familial exudative vitreoretinopathy;Persistent hyperplastic primary vitreous. The disease is caused by mutations affecting the gene represented in this entry.

Function

[FZD4_HUMAN] Receptor for Wnt proteins. Most of frizzled receptors are coupled to the beta-catenin (CTNNB1) canonical signaling pathway, which leads to the activation of disheveled proteins, inhibition of GSK-3 kinase, nuclear accumulation of beta-catenin (CTNNB1) and activation of Wnt target genes. Plays a critical role in retinal vascularization by acting as a receptor for Wnt proteins and norrin (NDP). In retina, it can be both activated by Wnt protein-binding, but also by a Wnt-independent signaling via binding of norrin (NDP), promoting in both cases beta-catenin (CTNNB1) accumulation and stimulation of LEF/TCF-mediated transcriptional programs. A second signaling pathway involving PKC and calcium fluxes has been seen for some family members, but it is not yet clear if it represents a distinct pathway or if it can be integrated in the canonical pathway, as PKC seems to be required for Wnt-mediated inactivation of GSK-3 kinase. Both pathways seem to involve interactions with G-proteins. May be involved in transduction and intercellular transmission of polarity information during tissue morphogenesis and/or in differentiated tissues.

Publication Abstract from PubMed

Wnt/beta-catenin signaling is activated when extracellular Wnt ligands bind Frizzled (FZD) receptors at the cell membrane. Wnts bind FZD cysteine-rich domains (CRDs) with high affinity through a palmitoylated N-terminal "thumb" and a disulfide-stabilized C-terminal "index finger," yet how these binding events trigger receptor activation and intracellular signaling remains unclear. Here we report the crystal structure of the Frizzled-4 (FZD4) CRD in complex with palmitoleic acid, which reveals a CRD tetramer consisting of two cross-braced CRD dimers. Each dimer is stabilized by interactions of one hydrophobic palmitoleic acid tail with two CRD palmitoleoyl-binding grooves oriented end to end, suggesting that the Wnt palmitoleoyl group stimulates CRD-CRD interaction. Using bioluminescence resonance energy transfer (BRET) in live cells, we show that WNT5A stimulates dimerization of membrane-anchored FZD4 CRDs and oligomerization of full-length FZD4, which requires the integrity of CRD palmitoleoyl-binding residues. These results suggest that FZD receptors may form signalosomes in response to Wnt binding through the CRDs and that the Wnt palmitoleoyl group is important in promoting these interactions. These results complement our understanding of lipoprotein receptor-related proteins 5 and 6 (LRP5/6), Dishevelled, and Axin signalosome assembly and provide a more complete model for Wnt signalosome assembly both intracellularly and at the membrane.

Wnt5a promotes Frizzled-4 signalosome assembly by stabilizing cysteine-rich domain dimerization.,DeBruine ZJ, Ke J, Harikumar KG, Gu X, Borowsky P, Williams BO, Xu W, Miller LJ, Xu HE, Melcher K Genes Dev. 2017 May 1;31(9):916-926. doi: 10.1101/gad.298331.117. Epub 2017 May, 25. PMID:28546512^[1]

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

References

↑ DeBruine ZJ, Ke J, Harikumar KG, Gu X, Borowsky P, Williams BO, Xu W, Miller LJ, Xu HE, Melcher K. Wnt5a promotes Frizzled-4 signalosome assembly by stabilizing cysteine-rich domain dimerization. Genes Dev. 2017 May 1;31(9):916-926. doi: 10.1101/gad.298331.117. Epub 2017 May, 25. PMID:28546512 doi:http://dx.doi.org/10.1101/gad.298331.117

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/5uwg"

@@ Line 1: / Line 1: @@
 ==The crystal structure of Fz4-CRD in complex with palmitoleic acid==
-<StructureSection load='5uwg' size='340' side='right' caption='[[5uwg]], [[Resolution|resolution]] 2.56&Aring;' scene=''>
+<StructureSection load='5uwg' size='340' side='right'caption='[[5uwg]], [[Resolution|resolution]] 2.56&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5uwg]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5UWG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5UWG FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5uwg]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5UWG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5UWG FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PAM:PALMITOLEIC+ACID'>PAM</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5cm4|5cm4]], [[5cl1|5cl1]]</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">FZD4 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=5uwg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5uwg OCA], [http://pdbe.org/5uwg PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5uwg RCSB], [http://www.ebi.ac.uk/pdbsum/5uwg PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5uwg ProSAT]</span></td></tr>
 </table>
@@ Line 25: / Line 26: @@
 __TOC__
 </StructureSection>
+[[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Brunzelle, J S]]
 [[Category: DeBruine, Z J]]

5uwg

From Proteopedia

Revision as of 17:12, 11 December 2019

The crystal structure of Fz4-CRD in complex with palmitoleic acid

Structural highlights

Disease

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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