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==Ensemble of 20 structures of the tetrameric mutant of the B1 domain of streptococcal protein G== | |||
<StructureSection load='1mpe' size='340' side='right'caption='[[1mpe]]' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1mpe]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_sp._'group_G' Streptococcus sp. 'group G']. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MPE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MPE FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=1mpe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mpe OCA], [https://pdbe.org/1mpe PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mpe RCSB], [https://www.ebi.ac.uk/pdbsum/1mpe PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mpe ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/SPG1_STRSG SPG1_STRSG] Binds to the constant Fc region of IgG with high affinity. | |||
== 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/mp/1mpe_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=1mpe ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The structure of a mutant immunoglobulin-binding B1 domain of streptococcal protein G (GB1), which comprises five conservative changes in hydrophobic core residues, was determined by NMR spectroscopy and X-ray crystallography. The oligomeric state and quaternary structure of the mutant protein are drastically changed from the wild type protein. The mutant structure consists of a symmetric tetramer, with intermolecular strand exchange involving all four units. Four of the five secondary structure elements present in the monomeric wild type GB1 structure are retained in the tetrameric structure, although their intra- and intermolecular interactions are altered. Our results demonstrate that through the acquisition of a moderate number of pivotal point mutations, proteins such as GB1 are able to undergo drastic structural changes, overcoming reduced stability of the monomeric unit by multimerization. The present structure is an illustrative example of how proteins exploit the breadth of conformational space. | |||
Core mutations switch monomeric protein GB1 into an intertwined tetramer.,Kirsten Frank M, Dyda F, Dobrodumov A, Gronenborn AM Nat Struct Biol. 2002 Nov;9(11):877-85. PMID:12379842<ref>PMID:12379842</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1mpe" style="background-color:#fffaf0;"></div> | |||
== | ==See Also== | ||
*[[Protein G|Protein G]] | |||
[[Category: | == References == | ||
[[Category: | <references/> | ||
[[Category: Dobrodumov | __TOC__ | ||
[[Category: Dyda | </StructureSection> | ||
[[Category: Frank | [[Category: Large Structures]] | ||
[[Category: Gronenborn | [[Category: Streptococcus sp. 'group G']] | ||
[[Category: Dobrodumov A]] | |||
[[Category: Dyda F]] | |||
[[Category: Frank MK]] | |||
[[Category: Gronenborn AM]] | |||
Latest revision as of 11:50, 22 May 2024
Ensemble of 20 structures of the tetrameric mutant of the B1 domain of streptococcal protein GEnsemble of 20 structures of the tetrameric mutant of the B1 domain of streptococcal protein G
Structural highlights
FunctionSPG1_STRSG Binds to the constant Fc region of IgG with high affinity. 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 PubMedThe structure of a mutant immunoglobulin-binding B1 domain of streptococcal protein G (GB1), which comprises five conservative changes in hydrophobic core residues, was determined by NMR spectroscopy and X-ray crystallography. The oligomeric state and quaternary structure of the mutant protein are drastically changed from the wild type protein. The mutant structure consists of a symmetric tetramer, with intermolecular strand exchange involving all four units. Four of the five secondary structure elements present in the monomeric wild type GB1 structure are retained in the tetrameric structure, although their intra- and intermolecular interactions are altered. Our results demonstrate that through the acquisition of a moderate number of pivotal point mutations, proteins such as GB1 are able to undergo drastic structural changes, overcoming reduced stability of the monomeric unit by multimerization. The present structure is an illustrative example of how proteins exploit the breadth of conformational space. Core mutations switch monomeric protein GB1 into an intertwined tetramer.,Kirsten Frank M, Dyda F, Dobrodumov A, Gronenborn AM Nat Struct Biol. 2002 Nov;9(11):877-85. PMID:12379842[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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