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4un2

From Proteopedia

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Current revision

Crystal structure of the UBA domain of Dsk2 in complex with Ubiquitin

Structural highlights

4un2 is a 2 chain structure with sequence from Homo sapiens and Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.51Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

UBC_HUMAN Ubiquitin exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-6-linked may be involved in DNA repair; Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, DNA-damage responses as well as in signaling processes leading to activation of the transcription factor NF-kappa-B. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling.^[1] ^[2]

Publication Abstract from PubMed

In a conformational selection scenario, manipulating the populations of binding-competent states should be expected to affect protein binding. We demonstrate how in silico designed point mutations within the core of ubiquitin, remote from the binding interface, change the binding specificity by shifting the conformational equilibrium of the ground-state ensemble between open and closed substates that have a similar population in the wild-type protein. Binding affinities determined by NMR titration experiments agree with the predictions, thereby showing that, indeed, a shift in the conformational equilibrium enables us to alter ubiquitin's binding specificity and hence its function. Thus, we present a novel route towards designing specific binding by a conformational shift through exploiting the fact that conformational selection depends on the concentration of binding-competent substates.

A Designed Conformational Shift To Control Protein Binding Specificity.,Michielssens S, Peters JH, Ban D, Pratihar S, Seeliger D, Sharma M, Giller K, Sabo TM, Becker S, Lee D, Griesinger C, de Groot BL Angew Chem Int Ed Engl. 2014 Aug 12. doi: 10.1002/anie.201403102. PMID:25115701^[3]

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

References

↑ Huang F, Kirkpatrick D, Jiang X, Gygi S, Sorkin A. Differential regulation of EGF receptor internalization and degradation by multiubiquitination within the kinase domain. Mol Cell. 2006 Mar 17;21(6):737-48. PMID:16543144 doi:S1097-2765(06)00120-1
↑ Komander D. The emerging complexity of protein ubiquitination. Biochem Soc Trans. 2009 Oct;37(Pt 5):937-53. doi: 10.1042/BST0370937. PMID:19754430 doi:10.1042/BST0370937
↑ Michielssens S, Peters JH, Ban D, Pratihar S, Seeliger D, Sharma M, Giller K, Sabo TM, Becker S, Lee D, Griesinger C, de Groot BL. A Designed Conformational Shift To Control Protein Binding Specificity. Angew Chem Int Ed Engl. 2014 Aug 12. doi: 10.1002/anie.201403102. PMID:25115701 doi:http://dx.doi.org/10.1002/anie.201403102

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/4un2"

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[4un2]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4UN2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4UN2 FirstGlance]. <br>
-</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=4un2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4un2 OCA], [https://pdbe.org/4un2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4un2 RCSB], [https://www.ebi.ac.uk/pdbsum/4un2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4un2 ProSAT]</span></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]] 1.51&#8491;</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=4un2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4un2 OCA], [https://pdbe.org/4un2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4un2 RCSB], [https://www.ebi.ac.uk/pdbsum/4un2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4un2 ProSAT]</span></td></tr>
 </table>
 == Function ==

4un2

From Proteopedia

Current revision

Crystal structure of the UBA domain of Dsk2 in complex with Ubiquitin

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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