1hvv: Difference between revisions

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[[Image:1hvv.gif|left|200px]]


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==SELF-ASSOCIATION OF THE H3 REGION OF SYNTAXIN 1A: IMPLICATIONS FOR SNARE COMPLEX ASSEMBLY==
The line below this paragraph, containing "STRUCTURE_1hvv", creates the "Structure Box" on the page.
<StructureSection load='1hvv' size='340' side='right'caption='[[1hvv]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)  
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[1hvv]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HVV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1HVV FirstGlance]. <br>
or leave the SCENE parameter empty for the default display.
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4&#8491;</td></tr>
-->
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=TAR:D(-)-TARTARIC+ACID'>TAR</scene></td></tr>
{{STRUCTURE_1hvv| PDB=1hvv |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1hvv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hvv OCA], [https://pdbe.org/1hvv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1hvv RCSB], [https://www.ebi.ac.uk/pdbsum/1hvv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1hvv ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/STX1A_RAT STX1A_RAT] Potentially involved in docking of synaptic vesicles at presynaptic active zones. May play a critical role in neurotransmitter exocytosis. May mediate Ca(2+)-regulation of exocytosis acrosomal reaction in sperm.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hv/1hvv_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1hvv ConSurf].
<div style="clear:both"></div>


'''SELF-ASSOCIATION OF THE H3 REGION OF SYNTAXIN 1A: IMPLICATIONS FOR SNARE COMPLEX ASSEMBLY'''
==See Also==
 
*[[Syntaxin 3D structures|Syntaxin 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
Intracellular membrane fusion requires SNARE proteins found on the vesicle and target membranes. SNAREs associate by formation of a parallel four-helix bundle, and it has been suggested that formation of this complex promotes membrane fusion. The membrane proximal region of the cytoplasmic domain of the SNARE syntaxin 1A, designated H3, contributes one of the four helices to the SNARE complex. In the crystal structure of syntaxin 1A H3, four molecules associate as a homotetramer composed of two pairs of parallel helices that are anti-parallel to each other. The H3 oligomer observed in the crystals is also found in solution, as assessed by gel filtration and chemical cross-linking studies. The crystal structure reveals that the highly conserved Phe-216 packs against conserved Gln-226 residues present on the anti-parallel pair of helices. Modeling indicates that Phe-216 prevents parallel tetramer formation. Mutation of Phe-216 to Leu appears to allow formation of parallel tetramers, whereas mutation to Ala destabilizes the protein. These results indicate that Phe-216 has a role in preventing formation of stable parallel helical bundles, thus favoring the interaction of the H3 region of syntaxin 1a with other proteins involved in membrane fusion.
[[Category: Large Structures]]
 
==About this Structure==
1HVV is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HVV OCA].
 
==Reference==
Self-association of the H3 region of syntaxin 1A. Implications for intermediates in SNARE complex assembly., Misura KM, Scheller RH, Weis WI, J Biol Chem. 2001 Apr 20;276(16):13273-82. Epub 2000 Dec 15. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11118447 11118447]
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
[[Category: Single protein]]
[[Category: Misura KMS]]
[[Category: Misura, K M.S.]]
[[Category: Scheller RH]]
[[Category: Scheller, R H.]]
[[Category: Weis WI]]
[[Category: Weis, W I.]]
[[Category: Alpha-helix]]
[[Category: Four-helix bundle]]
[[Category: Homotetramer]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 19:16:56 2008''

Latest revision as of 07:30, 7 February 2024

SELF-ASSOCIATION OF THE H3 REGION OF SYNTAXIN 1A: IMPLICATIONS FOR SNARE COMPLEX ASSEMBLY

1hvv, resolution 2.40Å

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