View source for 1lr8


==Crystal structure of Fs1, the heparin-binding domain of follistatin, complexed with the heparin analogue D-myo-inositol hexasulphate (Ins6S)==
<StructureSection load='1lr8' size='340' side='right'caption='[[1lr8]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1lr8]] is a 1 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=1LR8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LR8 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IHS:D-MYO-INOSITOL-HEXASULPHATE'>IHS</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=1lr8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lr8 OCA], [https://pdbe.org/1lr8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1lr8 RCSB], [https://www.ebi.ac.uk/pdbsum/1lr8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1lr8 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FST_RAT FST_RAT] Binds directly to activin and functions as an activin antagonist. Specific inhibitor of the biosynthesis and secretion of pituitary follicle stimulating hormone (FSH).
== 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/lr/1lr8_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=1lr8 ConSurf].
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== Publication Abstract from PubMed ==
Follistatin associates with transforming growth factor-beta-like growth factors such as activin or bone morphogenetic proteins to form an inactive complex, thereby regulating processes as diverse as embryonic development and cell secretion. Although an interaction between heparan sulfate chains present at the cell surface and follistatin has been recorded, the impact of this binding reaction on the follistatin-mediated inhibition of transforming growth factor-beta-like signaling remains unclear. To gain a structural insight into this interaction, we have solved the crystal structure of the presumed heparan sulfate-binding domain of follistatin, both alone and in complex with the small heparin analogs sucrose octasulfate and D-myo-inositol hexasulfate. In addition, we have confirmed the binding of the sucrose octasulfate and D-myo-inositol hexasulfate molecules to this follistatin domain and determined the association constants and stoichiometries of both interactions in solution using isothermal titration calorimetry. Overall, our results shed light upon the structure of this follistatin domain and reveal a novel conformation for a hinge region connecting epidermal growth factor-like and Kazal-like subdomains compared with the follistatin-like domain found in the extracellular matrix protein BM-40. Moreover, the crystallographic analysis of the two protein-ligand complexes mentioned above leads us to propose a potential location for the heparan sulfate-binding site on the surface of follistatin and to suggest the involvement of residues Asn80 and Arg86 in such a follistatin-heparin interaction.

Crystal structures of the heparan sulfate-binding domain of follistatin. Insights into ligand binding.,Innis CA, Hyvonen M J Biol Chem. 2003 Oct 10;278(41):39969-77. Epub 2003 Jul 16. PMID:12867435<ref>PMID:12867435</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1lr8" style="background-color:#fffaf0;"></div>

==See Also==
*[[Follistatin|Follistatin]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Rattus norvegicus]]
[[Category: Hyvonen M]]
[[Category: Innis CA]]