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1att

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[[Image:1att.jpg|left|200px]]
 
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==CRYSTAL STRUCTURE OF CLEAVED BOVINE ANTITHROMBIN III AT 3.2 ANGSTROMS RESOLUTION==
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The line below this paragraph, containing "STRUCTURE_1att", creates the "Structure Box" on the page.
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<StructureSection load='1att' size='340' side='right'caption='[[1att]], [[Resolution|resolution]] 3.20&Aring;' 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'>[[1att]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ATT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ATT 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">X-ray diffraction, [[Resolution|Resolution]] 3.2&#8491;</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=1att FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1att OCA], [https://pdbe.org/1att PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1att RCSB], [https://www.ebi.ac.uk/pdbsum/1att PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1att ProSAT]</span></td></tr>
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{{STRUCTURE_1att| PDB=1att | SCENE= }}
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ANT3_BOVIN ANT3_BOVIN] Most important serine protease inhibitor in plasma that regulates the blood coagulation cascade. AT-III inhibits thrombin, matriptase-3/TMPRSS7, as well as factors IXa, Xa and XIa. Its inhibitory activity is greatly enhanced in the presence of heparin (By similarity).
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/at/1att_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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=1att ConSurf].
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<div style="clear:both"></div>
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'''CRYSTAL STRUCTURE OF CLEAVED BOVINE ANTITHROMBIN III AT 3.2 ANGSTROMS RESOLUTION'''
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==See Also==
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*[[Antithrombin 3D structures|Antithrombin 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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The crystal structure of cleaved antithrombin III (ATIII) has been determined to 3.2 A resolution by single isomorphous replacement, real space density modification and phase extension protocols. The heavy-atom sites and the first molecular envelope were determined owing to the molecular replacement solution previously reported and partially refined. Refinement of the two molecules of the asymmetric unit led to a crystallographic R-factor of 0.212 for all reflections between 8.0 and 3.2 A, without inclusion of water molecules. The root-mean-square deviation from ideal values is, respectively, 0.015 A and 3.6 degrees for bond lengths and bond angles. The topology of the molecule closely resembles that of cleaved serpins inhibitors with the two residues forming the reactive bond at opposite ends of the molecule. The most significant difference between ATIII and alpha 1-antitrypsin lies in the 45 residue N-terminal extension in ATIII which contribute to the definition of the heparin binding site. This loop region at the surface of the molecule is held by two disulphide bridges to the protein core and exhibits high temperature factor values. It forms a valley which restrains the possibilities for binding of heparin. Docking of the pentasaccharide unit which represents the minimum fragment of heparin able to bind to ATIII indicates a possible role for arginine 14 in the interaction of heparin and the protein.
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==About this Structure==
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1ATT is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ATT OCA].
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==Reference==
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Crystal structure of cleaved bovine antithrombin III at 3.2 A resolution., Mourey L, Samama JP, Delarue M, Petitou M, Choay J, Moras D, J Mol Biol. 1993 Jul 5;232(1):223-41. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8331659 8331659]
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[[Category: Bos taurus]]
[[Category: Bos taurus]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Delarue, M.]]
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[[Category: Delarue M]]
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[[Category: Moras, D.]]
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[[Category: Moras D]]
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[[Category: Mourey, L.]]
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[[Category: Mourey L]]
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[[Category: Samama, J P.]]
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[[Category: Samama JP]]
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[[Category: Serine proteinase inhibitor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 10:41:04 2008''
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Current revision

CRYSTAL STRUCTURE OF CLEAVED BOVINE ANTITHROMBIN III AT 3.2 ANGSTROMS RESOLUTION

PDB ID 1att

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