1em7: Difference between revisions

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New page: left|200px<br /><applet load="1em7" size="450" color="white" frame="true" align="right" spinBox="true" caption="1em7, resolution 2.0Å" /> '''HELIX VARIANT OF THE ...
 
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[[Image:1em7.jpg|left|200px]]<br /><applet load="1em7" size="450" color="white" frame="true" align="right" spinBox="true"
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'''HELIX VARIANT OF THE B1 DOMAIN FROM STREPTOCOCCAL PROTEIN G'''<br />


==Overview==
==HELIX VARIANT OF THE B1 DOMAIN FROM STREPTOCOCCAL PROTEIN G==
Six helix surface positions of protein G (Gbeta1) were redesigned using a, computational protein design algorithm, resulting in the five fold mutant, Gbeta1m2. Gbeta1m2 is well folded with a circular dichroism spectrum, nearly identical to that of Gbeta1, and a melting temperature of 91, degrees C, approximately 6 degrees C higher than that of Gbeta1. The, crystal structure of Gbeta1m2 was solved to 2.0 A resolution by molecular, replacement. The absence of hydrogen bond or salt bridge interactions, between the designed residues in Gbeta1m2 suggests that the increased, stability of Gbeta1m2 is due to increased helix propensity and more, favorable helix dipole interactions.
<StructureSection load='1em7' size='340' side='right'caption='[[1em7]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1em7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_sp. Streptococcus sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EM7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EM7 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&#8491;</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=1em7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1em7 OCA], [https://pdbe.org/1em7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1em7 RCSB], [https://www.ebi.ac.uk/pdbsum/1em7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1em7 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/em/1em7_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=1em7 ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
1EM7 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Streptococcus_sp. Streptococcus sp.]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1EM7 OCA].
*[[Protein G|Protein G]]
 
__TOC__
==Reference==
</StructureSection>
Structure of a protein G helix variant suggests the importance of helix propensity and helix dipole interactions in protein design., Strop P, Marinescu AM, Mayo SL, Protein Sci. 2000 Jul;9(7):1391-4. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10933505 10933505]
[[Category: Large Structures]]
[[Category: Single protein]]
[[Category: Streptococcus sp]]
[[Category: Streptococcus sp.]]
[[Category: Marinescu AM]]
[[Category: Marinescu, A.M.]]
[[Category: Mayo SL]]
[[Category: Mayo, S.L.]]
[[Category: Strop P]]
[[Category: Strop, P.]]
[[Category: helix dipole interaction]]
[[Category: helix propensity]]
[[Category: protein design]]
[[Category: protein g]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 14:07:16 2007''

Latest revision as of 10:04, 7 February 2024

HELIX VARIANT OF THE B1 DOMAIN FROM STREPTOCOCCAL PROTEIN GHELIX VARIANT OF THE B1 DOMAIN FROM STREPTOCOCCAL PROTEIN G

Structural highlights

1em7 is a 1 chain structure with sequence from Streptococcus sp.. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

SPG1_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.

See Also

1em7, resolution 2.00Å

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