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1d5e

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Revision as of 17:50, 11 September 2015

The role of phenylalanine 8 in the stabilization of the S protein-S peptide interaction: Packing and cavities

Structural highlights

1d5e is a 2 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
NonStd Res:	,
Related:	1rbh, 1d5d, 1d5h
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[RNAS1_BOVIN] Endonuclease that catalyzes the cleavage of RNA on the 3' side of pyrimidine nucleotides. Acts on single stranded and double stranded RNA.^[1]

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

The hydrophobic effect is widely believed to be an important determinant of protein stability. However, it is difficult to obtain unambiguous experimental estimates of the contribution of the hydrophobic driving force to the overall free energy of folding. Thermodynamic and structural studies of large to small substitutions in proteins are the most direct method of measuring this contribution. We have substituted the buried residue Phe8 in RNase S with alanine, methionine, and norleucine. Binding thermodynamics and structures were characterized by titration calorimetry and crystallography, respectively. The crystal structures of the RNase S F8A, F8M, and F8Nle mutants indicate that the protein tolerates the changes without any main chain adjustments. The correlation of structural and thermodynamic parameters associated with large to small substitutions was analyzed for nine mutants of RNase S as well as 32 additional cavity-containing mutants of T4 lysozyme, human lysozyme, and barnase. Such substitutions were typically found to result in negligible changes in DeltaC(p)() and positive values of both DeltaDeltaH degrees and DeltaDeltaS of folding. Enthalpic effects were dominant, and the sign of DeltaDeltaS is the opposite of that expected from the hydrophobic effect. Values of DeltaDeltaG degrees and DeltaDeltaH degrees correlated better with changes in packing parameters such as residue depth or occluded surface than with the change in accessible surface area upon folding. These results suggest that the loss of packing interactions rather than the hydrophobic effect is a dominant contributor to the observed energetics for large to small substitutions. Hence, estimates of the magnitude of the hydrophobic driving force derived from earlier mutational studies are likely to be significantly in excess of the actual value.

Thermodynamic and structural studies of cavity formation in proteins suggest that loss of packing interactions rather than the hydrophobic effect dominates the observed energetics.,Ratnaparkhi GS, Varadarajan R Biochemistry. 2000 Oct 10;39(40):12365-74. PMID:11015216^[2]

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

References

↑ delCardayre SB, Ribo M, Yokel EM, Quirk DJ, Rutter WJ, Raines RT. Engineering ribonuclease A: production, purification and characterization of wild-type enzyme and mutants at Gln11. Protein Eng. 1995 Mar;8(3):261-73. PMID:7479688
↑ Ratnaparkhi GS, Varadarajan R. Thermodynamic and structural studies of cavity formation in proteins suggest that loss of packing interactions rather than the hydrophobic effect dominates the observed energetics. Biochemistry. 2000 Oct 10;39(40):12365-74. PMID:11015216

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1d5e"

@@ Line 6: / Line 6: @@
 <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=NLE:NORLEUCINE'>NLE</scene>, <scene name='pdbligand=SET:AMINOSERINE'>SET</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1rbh|1rbh]], [[1d5d|1d5d]], [[1d5h|1d5h]]</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=1d5e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d5e OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1d5e RCSB], [http://www.ebi.ac.uk/pdbsum/1d5e 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=1d5e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d5e OCA], [http://pdbe.org/1d5e PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1d5e RCSB], [http://www.ebi.ac.uk/pdbsum/1d5e PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 28: / Line 28: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1d5e" style="background-color:#fffaf0;"></div>
 ==See Also==

1d5e

From Proteopedia

Revision as of 17:50, 11 September 2015

The role of phenylalanine 8 in the stabilization of the S protein-S peptide interaction: Packing and cavities

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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