2vdr: Difference between revisions
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==Integrin AlphaIIbBeta3 Headpiece Bound to a chimeric Fibrinogen Gamma chain peptide, LGGAKQRGDV== | ==Integrin AlphaIIbBeta3 Headpiece Bound to a chimeric Fibrinogen Gamma chain peptide, LGGAKQRGDV== | ||
<StructureSection load='2vdr' size='340' side='right' caption='[[2vdr]], [[Resolution|resolution]] 2.40Å' scene=''> | <StructureSection load='2vdr' size='340' side='right'caption='[[2vdr]], [[Resolution|resolution]] 2.40Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2vdr]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human] 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=2VDR OCA]. For a <b>guided tour on the structure components</b> use [http:// | <table><tr><td colspan='2'>[[2vdr]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human] 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=2VDR OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=2VDR FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand= | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1mk7|1mk7]], [[2vdq|2vdq]], [[1m8o|1m8o]], [[1s4x|1s4x]], [[2vdn|2vdn]], [[1uv9|1uv9]], [[1tye|1tye]], [[1s4w|1s4w]], [[1mk9|1mk9]], [[1m1x|1m1x]], [[1rn0|1rn0]], [[1l5g|1l5g]], [[2vdm|2vdm]], [[1dpq|1dpq]], [[2vdo|2vdo]], [[2vdp|2vdp]], [[1jv2|1jv2]], [[1dpk|1dpk]], [[2vdk|2vdk]], [[1kup|1kup]], [[1kuz|1kuz]], [[2vdl|2vdl]], [[1miz|1miz]], [[1u8c|1u8c]], [[1jx5|1jx5]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1mk7|1mk7]], [[2vdq|2vdq]], [[1m8o|1m8o]], [[1s4x|1s4x]], [[2vdn|2vdn]], [[1uv9|1uv9]], [[1tye|1tye]], [[1s4w|1s4w]], [[1mk9|1mk9]], [[1m1x|1m1x]], [[1rn0|1rn0]], [[1l5g|1l5g]], [[2vdm|2vdm]], [[1dpq|1dpq]], [[2vdo|2vdo]], [[2vdp|2vdp]], [[1jv2|1jv2]], [[1dpk|1dpk]], [[2vdk|2vdk]], [[1kup|1kup]], [[1kuz|1kuz]], [[2vdl|2vdl]], [[1miz|1miz]], [[1u8c|1u8c]], [[1jx5|1jx5]]</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http:// | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=2vdr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vdr OCA], [http://pdbe.org/2vdr PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2vdr RCSB], [http://www.ebi.ac.uk/pdbsum/2vdr PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2vdr ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Disease == | == Disease == | ||
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==See Also== | ==See Also== | ||
*[[Fibrinogen|Fibrinogen]] | *[[Fibrinogen|Fibrinogen]] | ||
*[[Integrin|Integrin]] | *[[Integrin 3D structures|Integrin 3D structures]] | ||
*[[Monoclonal Antibodies 3D structures|Monoclonal Antibodies 3D structures]] | *[[Monoclonal Antibodies 3D structures|Monoclonal Antibodies 3D structures]] | ||
== References == | == References == | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Human]] | [[Category: Human]] | ||
[[Category: Large Structures]] | |||
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Springer, T A]] | [[Category: Springer, T A]] |
Latest revision as of 10:58, 4 November 2020
Integrin AlphaIIbBeta3 Headpiece Bound to a chimeric Fibrinogen Gamma chain peptide, LGGAKQRGDVIntegrin AlphaIIbBeta3 Headpiece Bound to a chimeric Fibrinogen Gamma chain peptide, LGGAKQRGDV
Structural highlights
Disease[ITA2B_HUMAN] Defects in ITGA2B are a cause of Glanzmann thrombasthenia (GT) [MIM:273800]; also known as thrombasthenia of Glanzmann and Naegeli. GT is the most common inherited disease of platelets. It is an autosomal recessive disorder characterized by mucocutaneous bleeding of mild-to-moderate severity and the inability of this integrin to recognize macromolecular or synthetic peptide ligands. GT has been classified clinically into types I and II. In type I, platelets show absence of the glycoprotein IIb/beta-3 complexes at their surface and lack fibrinogen and clot retraction capability. In type II, the platelets express the glycoprotein IIb/beta-3 complex at reduced levels (5-20% controls), have detectable amounts of fibrinogen, and have low or moderate clot retraction capability. The platelets of GT 'variants' have normal or near normal (60-100%) expression of dysfunctional receptors.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [FIBG_HUMAN] Defects in FGG are a cause of congenital afibrinogenemia (CAFBN) [MIM:202400]. This rare autosomal recessive disorder is characterized by bleeding that varies from mild to severe and by complete absence or extremely low levels of plasma and platelet fibrinogen. Note=Patients with congenital fibrinogen abnormalities can manifest different clinical pictures. Some cases are clinically silent, some show a tendency toward bleeding and some show a predisposition for thrombosis with or without bleeding. [ITB3_HUMAN] Defects in ITGB3 are a cause of Glanzmann thrombasthenia (GT) [MIM:273800]; also known as thrombasthenia of Glanzmann and Naegeli. GT is the most common inherited disease of platelets. It is an autosomal recessive disorder characterized by mucocutaneous bleeding of mild-to-moderate severity and the inability of this integrin to recognize macromolecular or synthetic peptide ligands. GT has been classified clinically into types I and II. In type I, platelets show absence of the glycoprotein IIb/beta-3 complexes at their surface and lack fibrinogen and clot retraction capability. In type II, the platelets express the glycoprotein IIb/beta-3 complex at reduced levels (5-20% controls), have detectable amounts of fibrinogen, and have low or moderate clot retraction capability. The platelets of GT 'variants' have normal or near normal (60-100%) expression of dysfunctional receptors.[20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] Function[ITA2B_HUMAN] Integrin alpha-IIb/beta-3 is a receptor for fibronectin, fibrinogen, plasminogen, prothrombin, thrombospondin and vitronectin. It recognizes the sequence R-G-D in a wide array of ligands. It recognizes the sequence H-H-L-G-G-G-A-K-Q-A-G-D-V in fibrinogen gamma chain. Following activation integrin alpha-IIb/beta-3 brings about platelet/platelet interaction through binding of soluble fibrinogen. This step leads to rapid platelet aggregation which physically plugs ruptured endothelial cell surface. [FIBG_HUMAN] Fibrinogen has a double function: yielding monomers that polymerize into fibrin and acting as a cofactor in platelet aggregation. [ITB3_HUMAN] Integrin alpha-V/beta-3 is a receptor for cytotactin, fibronectin, laminin, matrix metalloproteinase-2, osteopontin, osteomodulin, prothrombin, thrombospondin, vitronectin and von Willebrand factor. Integrin alpha-IIb/beta-3 is a receptor for fibronectin, fibrinogen, plasminogen, prothrombin, thrombospondin and vitronectin. Integrins alpha-IIb/beta-3 and alpha-V/beta-3 recognize the sequence R-G-D in a wide array of ligands. Integrin alpha-IIb/beta-3 recognizes the sequence H-H-L-G-G-G-A-K-Q-A-G-D-V in fibrinogen gamma chain. Following activation integrin alpha-IIb/beta-3 brings about platelet/platelet interaction through binding of soluble fibrinogen. This step leads to rapid platelet aggregation which physically plugs ruptured endothelial surface. In case of HIV-1 infection, the interaction with extracellular viral Tat protein seems to enhance angiogenesis in Kaposi's sarcoma lesions. 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 PubMedHemostasis and thrombosis (blood clotting) involve fibrinogen binding to integrin alpha(IIb)beta(3) on platelets, resulting in platelet aggregation. alpha(v)beta(3) binds fibrinogen via an Arg-Asp-Gly (RGD) motif in fibrinogen's alpha subunit. alpha(IIb)beta(3) also binds to fibrinogen; however, it does so via an unstructured RGD-lacking C-terminal region of the gamma subunit (gammaC peptide). These distinct modes of fibrinogen binding enable alpha(IIb)beta(3) and alpha(v)beta(3) to function cooperatively in hemostasis. In this study, crystal structures reveal the integrin alpha(IIb)beta(3)-gammaC peptide interface, and, for comparison, integrin alpha(IIb)beta(3) bound to a lamprey gammaC primordial RGD motif. Compared with RGD, the GAKQAGDV motif in gammaC adopts a different backbone configuration and binds over a more extended region. The integrin metal ion-dependent adhesion site (MIDAS) Mg(2+) ion binds the gammaC Asp side chain. The adjacent to MIDAS (ADMIDAS) Ca(2+) ion binds the gammaC C terminus, revealing a contribution for ADMIDAS in ligand binding. Structural data from this natively disordered gammaC peptide enhances our understanding of the involvement of gammaC peptide and integrin alpha(IIb)beta(3) in hemostasis and thrombosis. Structural basis for distinctive recognition of fibrinogen gammaC peptide by the platelet integrin alphaIIbbeta3.,Springer TA, Zhu J, Xiao T J Cell Biol. 2008 Aug 25;182(4):791-800. Epub 2008 Aug 18. PMID:18710925[37] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)
OCA- Human
- Large Structures
- Mus musculus
- Springer, T A
- Xiao, T
- Zhu, J
- Antagonist
- Cell adhesion
- Cell adhesion-immune system complex
- Cleavage on pair of basic residue
- Disease mutation
- Fibrinogen binding
- Glycoprotein
- Host-virus interaction
- Integrin
- Membrane
- Phosphorylation
- Platelet integrin alphaiibbeta3
- Pyrrolidone carboxylic acid
- Receptor
- Transmembrane