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4c9r

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Revision as of 09:56, 20 March 2019

Xenopus ZNRF3 ectodomain in complex with Xenopus RSPO2 Fu1-Fu2 crystal form I

Structural highlights

4c9r is a 4 chain structure with sequence from Silurana (xenopus) tropicalis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	4c84, 4c85, 4c86, 4c8a, 4c8c, 4c8f, 4c8p, 4c8t, 4c8u, 4c8v, 4c8w, 4c99, 4c9a, 4c9e, 4c9u, 4c9v
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[ZNRF3_XENTR] E3 ubiquitin-protein ligase that acts as a negative regulator of the Wnt signaling pathway by mediating the ubiquitination and subsequent degradation of Wnt receptor complex components (By similarity). [RSPO2_XENTR] Activator of the canonical Wnt signaling pathway by acting as a ligand for lgr4-6 receptors. Upon binding to lgr4-6 (lgr4, lgr5 or lgr6), lgr4-6 associate with phosphorylated lrp6 and frizzled receptors that are activated by extracellular Wnt receptors, triggering the canonical Wnt signaling pathway to increase expression of target genes. Acts both in the canonical. Wnt/beta-catenin-dependent pathway and in non-canonical Wnt signaling pathway. Activates neural markers and promotes muscle formation. Overexpression blocks activin, nodal and BMP4 signaling, suggesting that it may negatively regulate the TGF-beta pathway (By similarity).

Publication Abstract from PubMed

The four R-spondin (Rspo) proteins are secreted agonists of Wnt signalling in vertebrates, functioning in embryogenesis and adult stem cell biology. Through ubiquitination and degradation of Wnt receptors, the transmembrane E3 ubiquitin ligase ZNRF3 and related RNF43 antagonize Wnt signalling. Rspo ligands have been reported to inhibit the ligase activity through direct interaction with ZNRF3 and RNF43. Here we report multiple crystal structures of the ZNRF3 ectodomain (ZNRF3ecto), a signalling-competent Furin1-Furin2 (Fu1-Fu2) fragment of Rspo2 (Rspo2Fu1-Fu2), and Rspo2Fu1-Fu2 in complex with ZNRF3ecto, or RNF43ecto. A prominent loop in Fu1 clamps into equivalent grooves in the ZNRF3ecto and RNF43ecto surface. Rspo binding enhances dimerization of ZNRF3ecto but not of RNF43ecto. Comparison of the four Rspo proteins, mutants and chimeras in biophysical and cellular assays shows that their signalling potency depends on their ability to recruit ZNRF3 or RNF43 via Fu1 into a complex with LGR receptors, which interact with Rspo via Fu2.

Structural and molecular basis of ZNRF3/RNF43 transmembrane ubiquitin ligase inhibition by the Wnt agonist R-spondin.,Zebisch M, Xu Y, Krastev C, Macdonald BT, Chen M, Gilbert RJ, He X, Jones EY Nat Commun. 2013 Nov 14;4:2787. doi: 10.1038/ncomms3787. PMID:24225776^[1]

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

References

↑ Zebisch M, Xu Y, Krastev C, Macdonald BT, Chen M, Gilbert RJ, He X, Jones EY. Structural and molecular basis of ZNRF3/RNF43 transmembrane ubiquitin ligase inhibition by the Wnt agonist R-spondin. Nat Commun. 2013 Nov 14;4:2787. doi: 10.1038/ncomms3787. PMID:24225776 doi:http://dx.doi.org/10.1038/ncomms3787

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4c9r"

@@ Line 1: / Line 1: @@
 ==Xenopus ZNRF3 ectodomain in complex with Xenopus RSPO2 Fu1-Fu2 crystal form I==
-<StructureSection load='4c9r' size='340' side='right' caption='[[4c9r]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
+<StructureSection load='4c9r' size='340' side='right'caption='[[4c9r]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[4c9r]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Silurana_(xenopus)_tropicalis Silurana (xenopus) tropicalis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4C9R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4C9R FirstGlance]. <br>
@@ Line 25: / Line 25: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Jones, E Y]]
 [[Category: Zebisch, M]]

4c9r

From Proteopedia

Revision as of 09:56, 20 March 2019

Xenopus ZNRF3 ectodomain in complex with Xenopus RSPO2 Fu1-Fu2 crystal form I

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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