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3fil

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Revision as of 04:44, 10 February 2016

Structural and energetic determinants for hyperstable variants of GB1 obtained from in-vitro evolution

Structural highlights

3fil is a 2 chain structure with sequence from Strsg. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
NonStd Res:
Related:	2on8, 2onq, 1pga, 1gb4, 1fcc, 2qmt
Gene:	spg (STRSG)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

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 PubMed

In previous work, a strongly stabilized variant of the beta1 domain of streptococcal protein G (Gbeta1) was obtained by an in vitro selection method. This variant, termed Gbeta1-M2, contains the four substitutions E15V, T16L, T18I, and N37L. Here we elucidated the molecular basis of the observed strong stabilizations. The contributions of these four residues were analyzed individually and in various combinations, additional selections with focused Gbeta1 gene libraries were performed, and the crystal structure of Gbeta1-M2 was determined. All single substitutions (E15V, T16L, T18I, and N37L) stabilize wild-type Gbeta1 by contributions of between 1.6 and 6.0 kJ mol(-1) (at 70 degrees C). Hydrophobic residues at positions 16 and 37 provide the major contribution to stabilization by enlarging the hydrophobic core of Gbeta1. They also increase the tendency to form dimers, as shown by dependence on the concentration of apparent molecular mass in analytical ultracentrifugation, by concentration-dependent stability, and by a strongly increased van't Hoff enthalpy of unfolding. The 0.88-A crystal structure of Gbeta1-M2 and NMR measurements in solution provide the explanation for the observed dimer formation. It involves a head-to-head arrangement of two Gbeta1-M2 molecules via six intermolecular hydrogen bonds between the two beta strands 2 and 2' and an adjacent self-complementary hydrophobic surface area, which is created by the T16L and N37L substitutions and a large 120 degrees rotation of the Tyr33 side chain. This removal of hydrophilic groups and the malleability of the created hydrophobic surface provide the basis for the dimer formation of stabilized Gbeta1 variants.

Dimer formation of a stabilized Gbeta1 variant: a structural and energetic analysis.,Thoms S, Max KE, Wunderlich M, Jacso T, Lilie H, Reif B, Heinemann U, Schmid FX J Mol Biol. 2009 Sep 4;391(5):918-32. Epub 2009 Jun 13. PMID:19527728^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Thoms S, Max KE, Wunderlich M, Jacso T, Lilie H, Reif B, Heinemann U, Schmid FX. Dimer formation of a stabilized Gbeta1 variant: a structural and energetic analysis. J Mol Biol. 2009 Sep 4;391(5):918-32. Epub 2009 Jun 13. PMID:19527728 doi:10.1016/j.jmb.2009.06.031

1 Structural highlights
2 Evolutionary Conservation
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3fil"

@@ Line 2: / Line 2: @@
 <StructureSection load='3fil' size='340' side='right' caption='[[3fil]], [[Resolution|resolution]] 0.88&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3fil]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Streptococcus_sp._'group_g' Streptococcus sp. 'group g']. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FIL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3FIL FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3fil]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Strsg Strsg]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FIL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3FIL FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
 <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=FME:N-FORMYLMETHIONINE'>FME</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2on8|2on8]], [[2onq|2onq]], [[1pga|1pga]], [[1gb4|1gb4]], [[1fcc|1fcc]], [[2qmt|2qmt]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">spg ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1320 Streptococcus sp. 'group G'])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">spg ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1320 STRSG])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3fil FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fil OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3fil RCSB], [http://www.ebi.ac.uk/pdbsum/3fil PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3fil FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fil OCA], [http://pdbe.org/3fil PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3fil RCSB], [http://www.ebi.ac.uk/pdbsum/3fil PDBsum]</span></td></tr>
 </table>
 == Evolutionary Conservation ==
@@ Line 17: / Line 17: @@
     <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/chain_selection.php?pdb_ID=2ata ConSurf].
+</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=3fil ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">
@@ Line 27: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 3fil" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 34: / Line 35: @@
 __TOC__
 </StructureSection>
-[[Category: Streptococcus sp. 'group g']]
+[[Category: Strsg]]
 [[Category: Heinemann, U]]
 [[Category: Max, K E.A]]

3fil

From Proteopedia

Revision as of 04:44, 10 February 2016

Structural and energetic determinants for hyperstable variants of GB1 obtained from in-vitro evolution

Structural highlights

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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