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1hev

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[[Image:1hev.jpg|left|200px]]
 
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==HEVEIN: THE NMR ASSIGNMENT AND AN ASSESSMENT OF SOLUTION-STATE FOLDING FOR THE AGGLUTININ-TOXIN MOTIF==
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The line below this paragraph, containing "STRUCTURE_1hev", creates the "Structure Box" on the page.
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<StructureSection load='1hev' size='340' side='right'caption='[[1hev]]' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1hev]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Hevea_brasiliensis Hevea brasiliensis]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HEV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HEV FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1hev FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hev OCA], [https://pdbe.org/1hev PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hev RCSB], [https://www.ebi.ac.uk/pdbsum/1hev PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hev ProSAT]</span></td></tr>
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{{STRUCTURE_1hev| PDB=1hev | SCENE= }}
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</table>
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== Function ==
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'''HEVEIN: THE NMR ASSIGNMENT AND AN ASSESSMENT OF SOLUTION-STATE FOLDING FOR THE AGGLUTININ-TOXIN MOTIF'''
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[https://www.uniprot.org/uniprot/HEVE_HEVBR HEVE_HEVBR] N-acetyl-D-glucosamine / N-acetyl-D-neuraminic acid binding lectin. Can inhibit fungal growth.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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==Overview==
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Check<jmol>
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The first high-resolution solution-state structure of a member of the toxin-agglutinin folding motif with the WGA disulfide linkage is presented. The 1H NMR spectrum of hevein has been 100% assigned from residue 2 through residue 43, the C-terminus, using two-dimensional correlation and NOE spectroscopy. During the course of the NOESY analysis, the three-dimensional structural features of hevein were derived, using nonstereospecific distance constraints (with tight bounds) for XPLOR simulated annealing followed by unconstrained relaxation in the CHARMm force field, at two levels of long-range constraint density. In addition, a large number of low-bound-only constraints, corresponding to unobserved NOE's, were used in both refinements. The first structure elucidation employed a total of 180 distance constraints (60 of which were medium or long range, i/i+n with n &lt; or = 2). The second refinement employed 244 (101 medium or long range) constraints: some conformation-insensitive intraresidue constraints were deleted, two misassigned long-range constraints were corrected, and 41 new i/i+n (n &gt; or = 2) constraints were added. The average bounds precisions of the two refinements were comparable (+/- 0.44 A) and significantly tighter than those that result when a universal low bound corresponding to the sum of the van der Waals radii was used. (The more conservative treatment of NOE's gave the same final structure but required a higher constraint density before assignment errors would stand out during the refinement.) Constraint density also has a significant influence on convergence and accuracy using tight constraints. The study demonstrates that convergence within an ensemble of solution structures is not a dependable criterion for either the accuracy or precision of the derived structure. The best fitting conformers from the refinement at the higher constraint density bear a greater similarity to the solid-state structure of the domains of wheat germ agglutinin (0.95 A rmsd over residues 2-32) than to the recently reported 2.8-A X-ray structure of hevein (1.25 A rmsd over residues 2-32, 2.83 A rmsd over residues 2-42). The consensus conformer from the solution data is defined to a backbone rmsd of &lt; 0.6 A over the full sequence for which NMR data could be collected.(ABSTRACT TRUNCATED AT 400 WORDS)
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/he/1hev_consurf.spt"</scriptWhenChecked>
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==About this Structure==
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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1HEV is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Hevea_brasiliensis Hevea brasiliensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HEV OCA].
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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==Reference==
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</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=1hev ConSurf].
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Hevein: NMR assignment and assessment of solution-state folding for the agglutinin-toxin motif., Andersen NH, Cao B, Rodriguez-Romero A, Arreguin B, Biochemistry. 1993 Feb 16;32(6):1407-22. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8431421 8431421]
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
[[Category: Hevea brasiliensis]]
[[Category: Hevea brasiliensis]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Andersen, N H.]]
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[[Category: Andersen NH]]
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[[Category: Cao, B.]]
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[[Category: Cao B]]
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[[Category: Lectin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 18:46:48 2008''
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Current revision

HEVEIN: THE NMR ASSIGNMENT AND AN ASSESSMENT OF SOLUTION-STATE FOLDING FOR THE AGGLUTININ-TOXIN MOTIF

PDB ID 1hev

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