View source for 8tzv


==Apo form of human ATE1==
<StructureSection load='8tzv' size='340' side='right'caption='[[8tzv]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8tzv]] 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=8TZV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8TZV FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.8&#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=8tzv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8tzv OCA], [https://pdbe.org/8tzv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8tzv RCSB], [https://www.ebi.ac.uk/pdbsum/8tzv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8tzv ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ATE1_HUMAN ATE1_HUMAN] Involved in the post-translational conjugation of arginine to the N-terminal aspartate or glutamate of a protein (PubMed:34893540). This arginylation is required for degradation of the protein via the ubiquitin pathway (PubMed:34893540). Does not arginylate cysteine residues (By similarity).[UniProtKB:Q9Z2A5]<ref>PMID:34893540</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The arginyl-transferase ATE1 is a tRNA-dependent enzyme that covalently attaches an arginine molecule to a protein substrate. Conserved from yeast to humans, ATE1 deficiency in mice correlates with defects in cardiovascular development and angiogenesis and results in embryonic lethality, while conditional knockouts exhibit reproductive, developmental, and neurological deficiencies. Despite the recent revelation of the tRNA binding mechanism and the catalytic cycle of yeast ATE1, the structure-function relationship of ATE1 in higher organisms is not well understood. In this study, we present the three-dimensional structure of human ATE1 in an apo-state and in complex with its tRNA cofactor and a peptide substrate. In contrast to its yeast counterpart, human ATE1 forms a symmetric homodimer, which dissociates upon binding of a substrate. Furthermore, human ATE1 includes a unique and extended loop that wraps around tRNA(Arg), creating extensive contacts with the T-arm of the tRNA cofactor. Substituting key residues identified in the substrate binding site of ATE1 abolishes enzymatic activity and results in the accumulation of ATE1 substrates in cells.

Oligomerization and a distinct tRNA-binding loop are important regulators of human arginyl-transferase function.,Lan X, Huang W, Kim SB, Fu D, Abeywansha T, Lou J, Balamurugan U, Kwon YT, Ji CH, Taylor DJ, Zhang Y Nat Commun. 2024 Jul 28;15(1):6350. doi: 10.1038/s41467-024-50719-w. PMID:39068213<ref>PMID:39068213</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8tzv" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Huang W]]
[[Category: Taylor DJ]]
[[Category: Zhang Y]]