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==CATALYTICALLY INACTIVE TOBACCO ETCH VIRUS PROTEASE COMPLEXED WITH SUBSTRATE== | ==CATALYTICALLY INACTIVE TOBACCO ETCH VIRUS PROTEASE COMPLEXED WITH SUBSTRATE== | ||
<StructureSection load='1lvb' size='340' side='right' caption='[[1lvb]], [[Resolution|resolution]] 2.20Å' scene=''> | <StructureSection load='1lvb' size='340' side='right'caption='[[1lvb]], [[Resolution|resolution]] 2.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1lvb]] is a 4 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1lvb]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Tobacco_etch_virus Tobacco etch virus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LVB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LVB FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></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=1lvb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lvb OCA], [https://pdbe.org/1lvb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lvb RCSB], [https://www.ebi.ac.uk/pdbsum/1lvb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lvb ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/POLG_TEV POLG_TEV] Capsid protein: involved in aphid transmission, cell-to-cell and systemis movement, encapsidation of the viral RNA and in the regulation of viral RNA amplification.<ref>PMID:9880030</ref> <ref>PMID:11414807</ref> Nuclear inclusion protein B: an RNA-dependent RNA polymerase that plays an essential role in the virus replication.<ref>PMID:9880030</ref> <ref>PMID:11414807</ref> Helper component proteinase: required for aphid transmission and also has proteolytic activity. Only cleaves a Gly-Gly dipeptide at its own C-terminus. Interacts with virions and aphid stylets. Acts as a suppressor of RNA-mediated gene silencing, also known as post-transcriptional gene silencing (PTGS), a mechanism of plant viral defense that limits the accumulation of viral RNAs. May have RNA-binding activity.<ref>PMID:9880030</ref> <ref>PMID:11414807</ref> Cytoplasmic inclusion protein: has helicase activity. It may be involved in replication.<ref>PMID:9880030</ref> <ref>PMID:11414807</ref> Both 6K peptides are indispensable for virus replication (By similarity).<ref>PMID:9880030</ref> <ref>PMID:11414807</ref> Nuclear inclusion protein A: has RNA-binding and proteolytic activities.<ref>PMID:9880030</ref> <ref>PMID:11414807</ref> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/lv/1lvb_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/lv/1lvb_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/ | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
| Line 32: | Line 31: | ||
==See Also== | ==See Also== | ||
*[[ | *[[Tobacco Etch Virus (TEV) Protease|Tobacco Etch Virus (TEV) Protease]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Tobacco etch virus]] | ||
[[Category: | [[Category: Evdokimov AG]] | ||
[[Category: Kapust | [[Category: Kapust RB]] | ||
[[Category: Li | [[Category: Li M]] | ||
[[Category: | [[Category: Peters III HK]] | ||
[[Category: | [[Category: Phan J]] | ||
[[Category: | [[Category: Tropea JE]] | ||
[[Category: | [[Category: Waugh DS]] | ||
[[Category: | [[Category: Wlodawer A]] | ||
[[Category: | [[Category: Zdanov A]] | ||
Latest revision as of 11:37, 6 November 2024
CATALYTICALLY INACTIVE TOBACCO ETCH VIRUS PROTEASE COMPLEXED WITH SUBSTRATECATALYTICALLY INACTIVE TOBACCO ETCH VIRUS PROTEASE COMPLEXED WITH SUBSTRATE
Structural highlights
FunctionPOLG_TEV Capsid protein: involved in aphid transmission, cell-to-cell and systemis movement, encapsidation of the viral RNA and in the regulation of viral RNA amplification.[1] [2] Nuclear inclusion protein B: an RNA-dependent RNA polymerase that plays an essential role in the virus replication.[3] [4] Helper component proteinase: required for aphid transmission and also has proteolytic activity. Only cleaves a Gly-Gly dipeptide at its own C-terminus. Interacts with virions and aphid stylets. Acts as a suppressor of RNA-mediated gene silencing, also known as post-transcriptional gene silencing (PTGS), a mechanism of plant viral defense that limits the accumulation of viral RNAs. May have RNA-binding activity.[5] [6] Cytoplasmic inclusion protein: has helicase activity. It may be involved in replication.[7] [8] Both 6K peptides are indispensable for virus replication (By similarity).[9] [10] Nuclear inclusion protein A: has RNA-binding and proteolytic activities.[11] [12] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedBecause of its stringent sequence specificity, the 3C-type protease from tobacco etch virus (TEV) is frequently used to remove affinity tags from recombinant proteins. It is unclear, however, exactly how TEV protease recognizes its substrates with such high selectivity. The crystal structures of two TEV protease mutants, inactive C151A and autolysis-resistant S219D, have now been solved at 2.2- and 1.8-A resolution as complexes with a substrate and product peptide, respectively. The enzyme does not appear to have been perturbed by the mutations in either structure, and the modes of binding of the product and substrate are virtually identical. Analysis of the protein-ligand interactions helps to delineate the structural determinants of substrate specificity and provides guidance for reengineering the enzyme to further improve its utility for biotechnological applications. Structural basis for the substrate specificity of tobacco etch virus protease.,Phan J, Zdanov A, Evdokimov AG, Tropea JE, Peters HK 3rd, Kapust RB, Li M, Wlodawer A, Waugh DS J Biol Chem. 2002 Dec 27;277(52):50564-72. Epub 2002 Oct 10. PMID:12377789[13] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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