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1eeq

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Revision as of 04:42, 11 September 2015

M4L/Y(27D)D/T94H Mutant of LEN

Structural highlights

1eeq is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1lve, 2lve, 3lve, 4lve, 5lve, 1qac, 1eeu
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

We have examined the influence of surface hydrogen bonds on the stability of proteins by studying the effects of mutations of human immunoglobulin light chain variable domain (V(L)). In addition to the variants Y27dD, N28F, and T94H of protein kappa IV Len that were previously described, we characterized mutants M4L, L27cN, L27cQ, and K39T, double mutant M4L/Y27dD, and triple mutant M4L/Y27dD/T94H. The triple mutant had an enhanced thermodynamic stability of 4.2 kcal/mol. We determined the structure of the triple mutant by x-ray diffraction and correlated the changes in stability due to the mutations with changes in the three-dimensional structure. Y27dD mutant had increased stability of Len by 2.7 kcal/mol, a large value for a single mutation. Asp27d present in CDR1 formed hydrogen bonds with the side-chain and main-chain atoms within the loop. In the case of the K39T mutant, which reduces stability by 2 kcal/mol, Lys39 in addition to forming a hydrogen bond with a carbonyl oxygen of a neighboring loop may also favorably influence the surface electrostatics of the molecule. We showed that hydrogen bonds between residues in surface loops can add to the overall stability of the V(L) domains. The contribution to stability is further increased if the surface residue makes more than one hydrogen bond or if it forms a hydrogen bond between neighboring turns or loops separated from each other in the amino acid sequence. Based on our experiments we suggest that stabilization of proteins might be systematically accomplished by introducing additional hydrogen bonds on the surface. These substitutions are more straightforward to predict than core-packing interactions and can be selected to avoid affecting the protein's function.

Increasing protein stability by polar surface residues: domain-wide consequences of interactions within a loop.,Pokkuluri PR, Raffen R, Dieckman L, Boogaard C, Stevens FJ, Schiffer M Biophys J. 2002 Jan;82(1 Pt 1):391-8. PMID:11751325^[1]

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

References

↑ Pokkuluri PR, Raffen R, Dieckman L, Boogaard C, Stevens FJ, Schiffer M. Increasing protein stability by polar surface residues: domain-wide consequences of interactions within a loop. Biophys J. 2002 Jan;82(1 Pt 1):391-8. PMID:11751325

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1eeq"

@@ Line 2: / Line 2: @@
 <StructureSection load='1eeq' size='340' side='right' caption='[[1eeq]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1eeq]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EEQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1EEQ FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1eeq]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EEQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1EEQ FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1lve|1lve]], [[2lve|2lve]], [[3lve|3lve]], [[4lve|4lve]], [[5lve|5lve]], [[1qac|1qac]], [[1eeu|1eeu]]</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=1eeq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eeq OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1eeq RCSB], [http://www.ebi.ac.uk/pdbsum/1eeq 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=1eeq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eeq OCA], [http://pdbe.org/1eeq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1eeq RCSB], [http://www.ebi.ac.uk/pdbsum/1eeq PDBsum]</span></td></tr>
 </table>
 == Evolutionary Conservation ==
@@ Line 24: / Line 24: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1eeq" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: Boogaard, C]]
 [[Category: Dieckman, L]]

1eeq

From Proteopedia

Revision as of 04:42, 11 September 2015

M4L/Y(27D)D/T94H Mutant of LEN

Structural highlights

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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