|
|
| (2 intermediate revisions not shown.) |
| Line 1: |
Line 1: |
| | + | |
| | ==Crystal structure of the C-terminal lobe of the human UBR5 HECT domain== | | ==Crystal structure of the C-terminal lobe of the human UBR5 HECT domain== |
| - | <StructureSection load='3pt3' size='340' side='right' caption='[[3pt3]], [[Resolution|resolution]] 1.97Å' scene=''> | + | <StructureSection load='3pt3' size='340' side='right'caption='[[3pt3]], [[Resolution|resolution]] 1.97Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3pt3]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PT3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3PT3 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3pt3]] is a 2 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=3PT3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PT3 FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">UBR5, EDD, EDD1, HYD, KIAA0896 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</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]] 1.97Å</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=3pt3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pt3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3pt3 RCSB], [http://www.ebi.ac.uk/pdbsum/3pt3 PDBsum]</span></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=3pt3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pt3 OCA], [https://pdbe.org/3pt3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3pt3 RCSB], [https://www.ebi.ac.uk/pdbsum/3pt3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3pt3 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/UBR5_HUMAN UBR5_HUMAN]] E3 ubiquitin-protein ligase which is a component of the N-end rule pathway. Recognizes and binds to proteins bearing specific N-terminal residues that are destabilizing according to the N-end rule, leading to their ubiquitination and subsequent degradation (By similarity). Involved in maturation and/or transcriptional regulation of mRNA by activating CDK9 by polyubiquitination. May play a role in control of cell cycle progression. May have tumor suppressor function. Regulates DNA topoisomerase II binding protein (TopBP1) in the DNA damage response. Plays an essential role in extraembryonic development. Ubiquitinates acetylated PCK1. Also acts as a regulator of DNA damage response by acting as a suppressor of RNF168, an E3 ubiquitin-protein ligase that promotes accumulation of 'Lys-63'-linked histone H2A and H2AX at DNA damage sites, thereby acting as a guard against excessive spreading of ubiquitinated chromatin at damaged chromosomes.<ref>PMID:21127351</ref> <ref>PMID:21726808</ref> <ref>PMID:22884692</ref> | + | [https://www.uniprot.org/uniprot/UBR5_HUMAN UBR5_HUMAN] E3 ubiquitin-protein ligase which is a component of the N-end rule pathway. Recognizes and binds to proteins bearing specific N-terminal residues that are destabilizing according to the N-end rule, leading to their ubiquitination and subsequent degradation (By similarity). Involved in maturation and/or transcriptional regulation of mRNA by activating CDK9 by polyubiquitination. May play a role in control of cell cycle progression. May have tumor suppressor function. Regulates DNA topoisomerase II binding protein (TopBP1) in the DNA damage response. Plays an essential role in extraembryonic development. Ubiquitinates acetylated PCK1. Also acts as a regulator of DNA damage response by acting as a suppressor of RNF168, an E3 ubiquitin-protein ligase that promotes accumulation of 'Lys-63'-linked histone H2A and H2AX at DNA damage sites, thereby acting as a guard against excessive spreading of ubiquitinated chromatin at damaged chromosomes.<ref>PMID:21127351</ref> <ref>PMID:21726808</ref> <ref>PMID:22884692</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
| Line 16: |
Line 17: |
| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 3pt3" style="background-color:#fffaf0;"></div> |
| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[Ubiquitin protein ligase|Ubiquitin protein ligase]] | + | *[[Ubiquitin protein ligase 3D structures|Ubiquitin protein ligase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| Line 24: |
Line 26: |
| | </StructureSection> | | </StructureSection> |
| | [[Category: Homo sapiens]] | | [[Category: Homo sapiens]] |
| - | [[Category: Gehring, K]] | + | [[Category: Large Structures]] |
| - | [[Category: Kozlov, G]] | + | [[Category: Gehring K]] |
| - | [[Category: Matta-Camacho, E]] | + | [[Category: Kozlov G]] |
| - | [[Category: Menade, M]] | + | [[Category: Matta-Camacho E]] |
| - | [[Category: Edd]]
| + | [[Category: Menade M]] |
| - | [[Category: Hhyd]]
| + | |
| - | [[Category: Ligase]]
| + | |
| - | [[Category: Mixed alpha-beta fold]]
| + | |
| - | [[Category: Ubiquitin ligase]]
| + | |
| - | [[Category: Ubr5]]
| + | |
| Structural highlights
Function
UBR5_HUMAN E3 ubiquitin-protein ligase which is a component of the N-end rule pathway. Recognizes and binds to proteins bearing specific N-terminal residues that are destabilizing according to the N-end rule, leading to their ubiquitination and subsequent degradation (By similarity). Involved in maturation and/or transcriptional regulation of mRNA by activating CDK9 by polyubiquitination. May play a role in control of cell cycle progression. May have tumor suppressor function. Regulates DNA topoisomerase II binding protein (TopBP1) in the DNA damage response. Plays an essential role in extraembryonic development. Ubiquitinates acetylated PCK1. Also acts as a regulator of DNA damage response by acting as a suppressor of RNF168, an E3 ubiquitin-protein ligase that promotes accumulation of 'Lys-63'-linked histone H2A and H2AX at DNA damage sites, thereby acting as a guard against excessive spreading of ubiquitinated chromatin at damaged chromosomes.[1] [2] [3]
Publication Abstract from PubMed
UBR5 ubiquitin ligase (also known as EDD, Rat100 or hHYD) is a member of the E3 protein family of HECT (homologous to E6-AP C-terminus) ligases as it contains a C-terminal HECT domain. In ubiquitination cascades involving E3s of the HECT class, ubiquitin is transferred from an associated E2 ubiquitin-conjugating enzyme to the acceptor cysteine of the HECT domain, which consists of structurally distinct N- and C-lobes connected by a flexible linker. Here, the high-resolution crystal structure of the C-lobe of the HECT domain of human UBR5 is presented. The structure reveals important features that are unique compared with other HECT domains. In particular, a distinct four-residue insert in the second helix elongates this helix, resulting in a strikingly different orientation of the preceding loop. This protruding loop is likely to contribute to specificity towards the E2 ubiquitin-conjugating enzyme UBCH4, which is an important functional partner of UBR5. Ubiquitination assays showed that the C-lobe of UBR5 is able to form a thioester-linked E3-ubiquitin complex, although it does not physically interact with UBCH4 in NMR experiments. This study contributes to a better understanding of UBR5 ubiquitination activity.
Structure of the HECT C-lobe of the UBR5 E3 ubiquitin ligase.,Matta-Camacho E, Kozlov G, Menade M, Gehring K Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Oct 1;68(Pt 10):1158-63., doi: 10.1107/S1744309112036937. Epub 2012 Sep 22. PMID:23027739[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Cojocaru M, Bouchard A, Cloutier P, Cooper JJ, Varzavand K, Price DH, Coulombe B. Transcription factor IIS cooperates with the E3 ligase UBR5 to ubiquitinate the CDK9 subunit of the positive transcription elongation factor B. J Biol Chem. 2011 Feb 18;286(7):5012-22. doi: 10.1074/jbc.M110.176628. Epub 2010 , Dec 2. PMID:21127351 doi:10.1074/jbc.M110.176628
- ↑ Jiang W, Wang S, Xiao M, Lin Y, Zhou L, Lei Q, Xiong Y, Guan KL, Zhao S. Acetylation regulates gluconeogenesis by promoting PEPCK1 degradation via recruiting the UBR5 ubiquitin ligase. Mol Cell. 2011 Jul 8;43(1):33-44. doi: 10.1016/j.molcel.2011.04.028. PMID:21726808 doi:10.1016/j.molcel.2011.04.028
- ↑ Gudjonsson T, Altmeyer M, Savic V, Toledo L, Dinant C, Grofte M, Bartkova J, Poulsen M, Oka Y, Bekker-Jensen S, Mailand N, Neumann B, Heriche JK, Shearer R, Saunders D, Bartek J, Lukas J, Lukas C. TRIP12 and UBR5 suppress spreading of chromatin ubiquitylation at damaged chromosomes. Cell. 2012 Aug 17;150(4):697-709. doi: 10.1016/j.cell.2012.06.039. Epub 2012 Aug , 9. PMID:22884692 doi:http://dx.doi.org/10.1016/j.cell.2012.06.039
- ↑ Matta-Camacho E, Kozlov G, Menade M, Gehring K. Structure of the HECT C-lobe of the UBR5 E3 ubiquitin ligase. Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Oct 1;68(Pt 10):1158-63., doi: 10.1107/S1744309112036937. Epub 2012 Sep 22. PMID:23027739 doi:http://dx.doi.org/10.1107/S1744309112036937
|
