1z7l

<table><tr><td colspan='2'>[[1z7l]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Z7L OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1Z7L FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=TBR:HEXATANTALUM+DODECABROMIDE'>TBR</scene></td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Ube1x, Uba1, Ube1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1z7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1z7l OCA], [http://pdbe.org/1z7l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1z7l RCSB], [http://www.ebi.ac.uk/pdbsum/1z7l PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1z7l ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/UBA1_MOUSE UBA1_MOUSE]] Activates ubiquitin by first adenylating its C-terminal glycine residue with ATP, and thereafter linking this residue to the side chain of a cysteine residue in E1, yielding an ubiquitin-E1 thioester and free AMP.

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== Publication Abstract from PubMed ==

Protein ubiquitination requires the sequential activity of three enzymes: a ubiquitin-activating enzyme (E1), a ubiquitin-conjugating enzyme (E2), and a ubiquitin-ligase (E3). The ubiquitin-transfer machinery is hierarchically organized; for every ubiquitin-activating enzyme, there are several ubiquitin-conjugating enzymes, and most ubiquitin-conjugating enzymes can in turn interact with multiple ubiquitin ligases. Despite the central role of ubiquitin-activating enzyme in this cascade, a crystal structure of a ubiquitin-activating enzyme is not available. The enzyme is thought to consist of an adenylation domain, a catalytic cysteine domain, a four-helix bundle, and possibly, a ubiquitin-like domain. Its adenylation domain can be modeled because it is clearly homologous to the structurally known adenylation domains of the activating enzymes for the small ubiquitin-like modifier (SUMO) and for the protein encoded by the neuronal precursor cell-expressed, developmentally down-regulated gene 8 (NEDD8). Low sequence similarity and vastly different domain lengths make modeling difficult for the catalytic cysteine domain that results from the juxtaposition of two catalytic cysteine half-domains. Here, we present a biochemical and crystallographic characterization of the two half-domains and the crystal structure of the larger, second catalytic cysteine half-domain of mouse ubiquitin-activating enzyme. We show that the domain is organized around a conserved folding motif that is also present in the NEDD8- and SUMO-activating enzymes, and we propose a tentative model for full-length ubiquitin-activating enzyme.

Crystal structure of a fragment of mouse ubiquitin-activating enzyme.,Szczepanowski RH, Filipek R, Bochtler M J Biol Chem. 2005 Jun 10;280(23):22006-11. Epub 2005 Mar 16. PMID:15774460<ref>PMID:15774460</ref>

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

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<div class="pdbe-citations 1z7l" style="background-color:#fffaf0;"></div>

*[[Ubiquitin activating enzyme|Ubiquitin activating enzyme]]

[[Category: Lk3 transgenic mice]]

[[Category: Bochtler, M]]

[[Category: Filipek, R]]

[[Category: Szczepanowski, R H]]

[[Category: Ubiquitin-activating enzyme]]