View source for 2grp

==Crystal Structure of human RanGAP1-Ubc9-Y87A==
<StructureSection load='2grp' size='340' side='right' caption='[[2grp]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2grp]] 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=2GRP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2GRP FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2grn|2grn]], [[2gro|2gro]], [[2grq|2grq]], [[2grr|2grr]]</td></tr>
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">UBE2I, UBC9, UBCE9 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]), RANGAP1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ubiquitin--protein_ligase Ubiquitin--protein ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.19 6.3.2.19] </span></td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2grp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2grp OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2grp RCSB], [http://www.ebi.ac.uk/pdbsum/2grp PDBsum]</span></td></tr>
<table>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gr/2grp_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
E2 conjugating proteins that transfer ubiquitin and ubiquitin-like modifiers to substrate lysine residues must first activate the lysine nucleophile for conjugation. Genetic complementation revealed three side chains of the E2 Ubc9 that were crucial for normal growth. Kinetic analysis revealed modest binding defects but substantially lowered catalytic rates for these mutant alleles with respect to wild-type Ubc9. X-ray structures for wild-type and mutant human Ubc9-RanGAP1 complexes showed partial loss of contacts to the substrate lysine in mutant complexes. Computational analysis predicted pK perturbations for the substrate lysine, and Ubc9 mutations weakened pK suppression through improper side chain coordination. Biochemical studies with p53, RanGAP1 and the Nup358/RanBP2 E3 were used to determine rate constants and pK values, confirming both structural and computational predictions. It seems that Ubc9 uses an indirect mechanism to activate lysine for conjugation that may be conserved among E2 family members.

Lysine activation and functional analysis of E2-mediated conjugation in the SUMO pathway.,Yunus AA, Lima CD Nat Struct Mol Biol. 2006 Jun;13(6):491-9. Epub 2006 May 28. PMID:16732283<ref>PMID:16732283</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>

==See Also==
*[[SUMO conjugating enzyme Ubc9|SUMO conjugating enzyme Ubc9]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Ubiquitin--protein ligase]]
[[Category: Lima, C D.]]
[[Category: Yunus, A A.]]
[[Category: Conjugation]]
[[Category: Ligase]]
[[Category: Small ubiquitin like modifer]]
[[Category: Smt3]]
[[Category: Ubiquitin]]