1pgx

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[[Image:1pgx.gif|left|200px]]
 
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==THE 1.66 ANGSTROMS X-RAY STRUCTURE OF THE B2 IMMUNOGLOBULIN-BINDING DOMAIN OF STREPTOCOCCAL PROTEIN G AND COMPARISON TO THE NMR STRUCTURE OF THE B1 DOMAIN==
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The line below this paragraph, containing "STRUCTURE_1pgx", creates the "Structure Box" on the page.
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<StructureSection load='1pgx' size='340' side='right'caption='[[1pgx]], [[Resolution|resolution]] 1.66&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'>[[1pgx]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus Streptococcus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PGX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PGX 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]] 1.66&#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=1pgx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pgx OCA], [https://pdbe.org/1pgx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pgx RCSB], [https://www.ebi.ac.uk/pdbsum/1pgx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pgx ProSAT]</span></td></tr>
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{{STRUCTURE_1pgx| PDB=1pgx | SCENE= }}
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/SPG1_STRSG SPG1_STRSG] Binds to the constant Fc region of IgG with high affinity.
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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/pg/1pgx_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=1pgx ConSurf].
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<div style="clear:both"></div>
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'''THE 1.66 ANGSTROMS X-RAY STRUCTURE OF THE B2 IMMUNOGLOBULIN-BINDING DOMAIN OF STREPTOCOCCAL PROTEIN G AND COMPARISON TO THE NMR STRUCTURE OF THE B1 DOMAIN'''
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==See Also==
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*[[Protein G|Protein G]]
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__TOC__
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==Overview==
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</StructureSection>
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The structure of the B2 immunoglobulin-binding domain of streptococcal protein G has been determined at 1.67-A resolution using a combination of single isomorphous replacement (SIR) phasing and manual fitting of the coordinates of the NMR structure of B1 domain of streptococcal protein G [Gronenborn, A. M., et al. (1991) Science 253, 657-661]. The final R value was 0.191 for data between 8.0 and 1.67 A. The structure described here has 13 residues preceding the 57-residue Ig-binding domain and 13 additional residues following it, for a total of 83 residues. The 57-residue binding domain is well-determined in the structure, having an average B factor of 18.0. Only residues 8-77 could be located in the electron density maps, with the ends of the structure fading into disorder. Like the B1 domain, the B2 domain consists of four beta-strands and a single helix lying diagonally across the beta-sheet, with a -1, +3 chi, -1 topology. This small structure is extensively hydrogen-bonded and has a relatively large hydrophobic core. These structural observations may account for the exceptional stability of protein G. A comparison of the B2 domain X-ray structure and the B1 domain NMR structure showed minor differences in the turn between strands and two and a slight displacement of the helix relative to the sheet. Hydrogen bonds between crystallographically related molecules account for most of these differences.
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[[Category: Large Structures]]
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==About this Structure==
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1PGX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Streptococcus Streptococcus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PGX OCA].
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==Reference==
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1.67-A X-ray structure of the B2 immunoglobulin-binding domain of streptococcal protein G and comparison to the NMR structure of the B1 domain., Achari A, Hale SP, Howard AJ, Clore GM, Gronenborn AM, Hardman KD, Whitlow M, Biochemistry. 1992 Nov 3;31(43):10449-57. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/1420164 1420164]
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[[Category: Single protein]]
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[[Category: Streptococcus]]
[[Category: Streptococcus]]
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[[Category: Achari, A.]]
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[[Category: Achari A]]
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[[Category: Howard, A J.]]
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[[Category: Howard AJ]]
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[[Category: Whitlow, M.]]
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[[Category: Whitlow M]]
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[[Category: Immunoglobulin binding protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 05:04:28 2008''
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Current revision

THE 1.66 ANGSTROMS X-RAY STRUCTURE OF THE B2 IMMUNOGLOBULIN-BINDING DOMAIN OF STREPTOCOCCAL PROTEIN G AND COMPARISON TO THE NMR STRUCTURE OF THE B1 DOMAIN

PDB ID 1pgx

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