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==Crystal structure of the human Adenovirus type 7 fiber knob==
==Crystal structure of the human Adenovirus type 7 fiber knob==
<StructureSection load='3exw' size='340' side='right' caption='[[3exw]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
<StructureSection load='3exw' size='340' side='right'caption='[[3exw]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3exw]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Ade07 Ade07]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3EXW OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3EXW FirstGlance]. <br>
<table><tr><td colspan='2'>[[3exw]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_adenovirus_7 Human adenovirus 7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3EXW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3EXW FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2o39|2o39]], [[2qlk|2qlk]], [[3bq4|3bq4]], [[1knb|1knb]], [[3exv|3exv]], [[3foy|3foy]]</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]] 1.75&#8491;</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">L5 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10519 ADE07])</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=3exw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3exw OCA], [https://pdbe.org/3exw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3exw RCSB], [https://www.ebi.ac.uk/pdbsum/3exw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3exw ProSAT]</span></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=3exw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3exw OCA], [http://pdbe.org/3exw PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3exw RCSB], [http://www.ebi.ac.uk/pdbsum/3exw PDBsum]</span></td></tr>
</table>
</table>
== Function ==
[https://www.uniprot.org/uniprot/SPIKE_ADE07 SPIKE_ADE07] Forms spikes that protrude from each vertex of the icosahedral capsid. Interacts with host receptor CD46 to provide virion initial attachment to target cell. Fiber proteins are shed during virus entry, when virus is still at the cell surface.<ref>PMID:11152512</ref>
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ex/3exw_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ex/3exw_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
Line 17: Line 19:
</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/main_output.php?pdb_ID=3exw ConSurf].
</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/main_output.php?pdb_ID=3exw ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Adenoviruses (Ads) are icosahedral, nonenveloped viruses with a double-stranded DNA genome. The 51 known Ad serotypes exhibit profound variations in cell tropism and disease types. The number of observed Ad infections is steadily increasing, sometimes leading to fatal outcomes even in healthy individuals. Species B Ads can cause kidney infections, hemorrhagic cystitis, and severe respiratory infections, and most of them use the membrane cofactor protein CD46 as a cellular receptor. The crystal structure of the human Ad type 11 (Ad11) knob complexed with CD46 is known; however, the determinants of CD46 binding in related species B Ads remain unclear. We report here a structural and functional analysis of the Ad11 knob, as well as the Ad7 and Ad14 knobs, which are closely related in sequence to the Ad11 knob but have altered CD46-binding properties. The comparison of the structures of the three knobs, which we determined at very high resolution, provides a platform for understanding these differences and allows us to propose a mechanism for productive high-affinity engagement of CD46. At the center of this mechanism is an Ad knob arginine that needs to switch its orientation in order to engage CD46 with high affinity. Quantum chemical calculations showed that the CD46-binding affinity of Ad11 is significantly higher than that of Ad7. Thus, while Ad7 and Ad14 also bind CD46, the affinity and kinetics of these interactions suggest that these Ads are unlikely to use CD46 productively. The proposed mechanism is likely to determine the receptor usage of all CD46-binding Ads.
An arginine switch in the species B adenovirus knob determines high-affinity engagement of cellular receptor CD46.,Persson BD, Muller S, Reiter DM, Schmitt BB, Marttila M, Sumowski CV, Schweizer S, Scheu U, Ochsenfeld C, Arnberg N, Stehle T J Virol. 2009 Jan;83(2):673-86. Epub 2008 Nov 5. PMID:18987134<ref>PMID:18987134</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3exw" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Ade07]]
[[Category: Human adenovirus 7]]
[[Category: Arnberg, N]]
[[Category: Large Structures]]
[[Category: Persson, B D]]
[[Category: Arnberg N]]
[[Category: Reiter, D M]]
[[Category: Persson BD]]
[[Category: Stehle, T]]
[[Category: Reiter DM]]
[[Category: Ad7]]
[[Category: Stehle T]]
[[Category: Adenovirus]]
[[Category: Ad]]
[[Category: Fiber knob]]
[[Category: Trimer]]
[[Category: Viral protein]]

Latest revision as of 09:37, 3 April 2024

Crystal structure of the human Adenovirus type 7 fiber knobCrystal structure of the human Adenovirus type 7 fiber knob

Structural highlights

3exw is a 3 chain structure with sequence from Human adenovirus 7. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.75Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

SPIKE_ADE07 Forms spikes that protrude from each vertex of the icosahedral capsid. Interacts with host receptor CD46 to provide virion initial attachment to target cell. Fiber proteins are shed during virus entry, when virus is still at the cell surface.[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

References

  1. ↑ Miyazawa N, Crystal RG, Leopold PL. Adenovirus serotype 7 retention in a late endosomal compartment prior to cytosol escape is modulated by fiber protein. J Virol. 2001 Feb;75(3):1387-400. PMID:11152512 doi:10.1128/JVI.75.3.1387-1400.2001

3exw, resolution 1.75Å

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