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==CRYSTAL STRUCTURE OF THE VON WILLEBRAND FACTOR (VWF) A1 DOMAIN I546V MUTANT IN COMPLEX WITH THE FUNCTION BLOCKING FAB NMC4==
==CRYSTAL STRUCTURE OF THE VON WILLEBRAND FACTOR (VWF) A1 DOMAIN I546V MUTANT IN COMPLEX WITH THE FUNCTION BLOCKING FAB NMC4==
<StructureSection load='1fns' size='340' side='right' caption='[[1fns]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
<StructureSection load='1fns' size='340' side='right'caption='[[1fns]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1fns]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FNS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1FNS FirstGlance]. <br>
<table><tr><td colspan='2'>[[1fns]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FNS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FNS FirstGlance]. <br>
</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=1fns FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fns OCA], [http://pdbe.org/1fns PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1fns RCSB], [http://www.ebi.ac.uk/pdbsum/1fns PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1fns ProSAT]</span></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]] 2&#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=1fns FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fns OCA], [https://pdbe.org/1fns PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fns RCSB], [https://www.ebi.ac.uk/pdbsum/1fns PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fns ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
[[http://www.uniprot.org/uniprot/VWF_HUMAN VWF_HUMAN]] Defects in VWF are the cause of von Willebrand disease type 1 (VWD1) [MIM:[http://omim.org/entry/193400 193400]]. A common hemorrhagic disorder due to defects in von Willebrand factor protein and resulting in impaired platelet aggregation. Von Willebrand disease type 1 is characterized by partial quantitative deficiency of circulating von Willebrand factor, that is otherwise structurally and functionally normal. Clinical manifestations are mucocutaneous bleeding, such as epistaxis and menorrhagia, and prolonged bleeding after surgery or trauma.<ref>PMID:10887119</ref> <ref>PMID:11698279</ref>  Defects in VWF are the cause of von Willebrand disease type 2 (VWD2) [MIM:[http://omim.org/entry/613554 613554]]. A hemorrhagic disorder due to defects in von Willebrand factor protein and resulting in impaired platelet aggregation. Von Willebrand disease type 2 is characterized by qualitative deficiency and functional anomalies of von Willebrand factor. It is divided in different subtypes including 2A, 2B, 2M and 2N (Normandy variant). The mutant VWF protein in types 2A, 2B and 2M are defective in their platelet-dependent function, whereas the mutant protein in type 2N is defective in its ability to bind factor VIII. Clinical manifestations are mucocutaneous bleeding, such as epistaxis and menorrhagia, and prolonged bleeding after surgery or trauma.  Defects in VWF are the cause of von Willebrand disease type 3 (VWD3) [MIM:[http://omim.org/entry/277480 277480]]. A severe hemorrhagic disorder due to a total or near total absence of von Willebrand factor in the plasma and cellular compartments, also leading to a profound deficiency of plasmatic factor VIII. Bleeding usually starts in infancy and can include epistaxis, recurrent mucocutaneous bleeding, excessive bleeding after minor trauma, and hemarthroses.
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/VWF_HUMAN VWF_HUMAN]] Important in the maintenance of hemostasis, it promotes adhesion of platelets to the sites of vascular injury by forming a molecular bridge between sub-endothelial collagen matrix and platelet-surface receptor complex GPIb-IX-V. Also acts as a chaperone for coagulation factor VIII, delivering it to the site of injury, stabilizing its heterodimeric structure and protecting it from premature clearance from plasma.
[https://www.uniprot.org/uniprot/IGKC_MOUSE IGKC_MOUSE]  
== 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/fn/1fns_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fn/1fns_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <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>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
[[Category: Varughese, K I]]
[[Category: Varughese KI]]
[[Category: Blood coagulation type 2b von willebrand disease]]
[[Category: Immune system]]
[[Category: Von willebrand factor]]

Latest revision as of 07:31, 17 October 2024

CRYSTAL STRUCTURE OF THE VON WILLEBRAND FACTOR (VWF) A1 DOMAIN I546V MUTANT IN COMPLEX WITH THE FUNCTION BLOCKING FAB NMC4CRYSTAL STRUCTURE OF THE VON WILLEBRAND FACTOR (VWF) A1 DOMAIN I546V MUTANT IN COMPLEX WITH THE FUNCTION BLOCKING FAB NMC4

Structural highlights

1fns is a 3 chain structure with sequence from Homo sapiens and Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

IGKC_MOUSE

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 PubMed

Platelet participation in hemostasis and arterial thrombosis requires the binding of glycoprotein (GP) Ibalpha to von Willebrand factor (vWF). Hemodynamic forces enhance this interaction, an effect mimicked by the substitution I546V in the vWF A1 domain. A water molecule becomes internalized near the deleted Ile methyl group. The change in hydrophobicity of the local environment causes positional changes propagated over a distance of 27 A. As a consequence, a major reorientation of a peptide plane occurs in a surface loop involved in GP Ibalpha binding. This distinct vWF conformation shows increased platelet adhesion and provides a structural model for the initial regulation of thrombus formation.

von Willebrand factor conformation and adhesive function is modulated by an internalized water molecule.,Celikel R, Ruggeri ZM, Varughese KI Nat Struct Biol. 2000 Oct;7(10):881-4. PMID:11017197[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

  1. ↑ Celikel R, Ruggeri ZM, Varughese KI. von Willebrand factor conformation and adhesive function is modulated by an internalized water molecule. Nat Struct Biol. 2000 Oct;7(10):881-4. PMID:11017197 doi:10.1038/79639

1fns, resolution 2.00Å

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