3obu: Difference between revisions

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[[Image:3obu.png|left|200px]]


{{STRUCTURE_3obu| PDB=3obu | SCENE= }}
==Crystal structure of the Tsg101 UEV domain in complex with a HIV-1 PTAP peptide==
<StructureSection load='3obu' size='340' side='right'caption='[[3obu]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3obu]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3OBU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3OBU FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.6&#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=3obu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3obu OCA], [https://pdbe.org/3obu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3obu RCSB], [https://www.ebi.ac.uk/pdbsum/3obu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3obu ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TS101_HUMAN TS101_HUMAN] Component of the ESCRT-I complex, a regulator of vesicular trafficking process. Binds to ubiquitinated cargo proteins and is required for the sorting of endocytic ubiquitinated cargos into multivesicular bodies (MVBs). Mediates the association between the ESCRT-0 and ESCRT-I complex. Required for completion of cytokinesis; the function requires CEP55. May be involved in cell growth and differentiation. Acts as a negative growth regulator. Involved in the budding of many viruses through an interaction with viral proteins that contain a late-budding motif P-[ST]-A-P. This interaction is essential for viral particle budding of numerous retroviruses.<ref>PMID:11916981</ref> <ref>PMID:17853893</ref> <ref>PMID:17556548</ref>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Budding of HIV-1 requires the binding of the PTAP late domain of the Gag p6 protein to the UEV domain of the TSG101 subunit of ESCRT-I. The normal function of this motif in cells is in receptor downregulation. Here, we report the 1.4-1.6 A structures of the human TSG101 UEV domain alone and with wild-type and mutant HIV-1 PTAP and Hrs PSAP nonapeptides. The hydroxyl of the Thr or Ser residue in the P(S/T)AP motif hydrogen bonds with the main chain of Asn69. Mutation of the Asn to Pro, blocking the main-chain amide, abrogates PTAP motif binding in vitro and blocks budding of HIV-1 from cells. N69P and other PTAP binding-deficient alleles of TSG101 did not rescue HIV-1 budding. However, the mutant alleles did rescue downregulation of endogenous EGF receptor. This demonstrates that the PSAP motif is not rate determining in EGF receptor downregulation under normal conditions.


===Crystal structure of the Tsg101 UEV domain in complex with a HIV-1 PTAP peptide===
Crystallographic and functional analysis of the ESCRT-I /HIV-1 Gag PTAP interaction.,Im YJ, Kuo L, Ren X, Burgos PV, Zhao XZ, Liu F, Burke TR Jr, Bonifacino JS, Freed EO, Hurley JH Structure. 2010 Nov 10;18(11):1536-47. PMID:21070952<ref>PMID:21070952</ref>


{{ABSTRACT_PUBMED_21070952}}
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
</div>
==About this Structure==
<div class="pdbe-citations 3obu" style="background-color:#fffaf0;"></div>
[[3obu]] is a 2 chain structure of [[Gag polyprotein]] 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=3OBU OCA].


==See Also==
==See Also==
*[[Gag polyprotein|Gag polyprotein]]
*[[Tumor susceptibility gene 101|Tumor susceptibility gene 101]]
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:021070952</ref><references group="xtra"/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Hurley, J H.]]
[[Category: Human immunodeficiency virus 1]]
[[Category: Im, Y J.]]
[[Category: Large Structures]]
[[Category: Hiv-1 gag]]
[[Category: Hurley JH]]
[[Category: Protein tranport]]
[[Category: Im YJ]]
[[Category: Protein transport]]
[[Category: Ubiquitin]]
Retrieved from "https://proteopedia.org/3obu"