3DI8 image
Deposition Date 2008-06-20
Release Date 2008-07-15
Last Version Date 2024-11-13
Entry Detail
PDB ID:
3DI8
Keywords:
Title:
Crystal structure of bovine pancreatic ribonuclease A variant (V57A)
Biological Source:
Source Organism:
Bos taurus (Taxon ID: 9913)
Method Details:
Experimental Method:
Resolution:
1.60 Å
R-Value Free:
0.22
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 32 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Ribonuclease pancreatic
Gene (Uniprot):RNASE1
Mutations:V57A
Chain IDs:A
Chain Length:124
Number of Molecules:1
Biological Source:Bos taurus
Primary Citation
X-ray crystallographic studies of RNase A variants engineered at the most destabilizing positions of the main hydrophobic core: further insight into protein stability
Proteins 77 658 669 (2009)
PMID: 19544568 DOI: 10.1002/prot.22480

Abstact

To investigate the structural origin of decreased pressure and temperature stability, the crystal structure of bovine pancreatic ribonuclease A variants V47A, V54A, V57A, I81A, I106A, and V108A was solved at 1.4-2.0 A resolution and compared with the structure of wild-type protein. The introduced mutations had only minor influence on the global structure of ribonuclease A. The structural changes had individual character that depends on the localization of mutated residue, however, they seemed to expand from mutation site to the rest of the structure. Several different parameters have been evaluated to find correlation with decrease of free energy of unfolding DeltaDeltaG(T), and the most significant correlation was found for main cavity volume change. Analysis of the difference distance matrices revealed that the ribonuclease A molecule is organized into five relatively rigid subdomains with individual response to mutation. This behavior consistent with results of unfolding experiments is an intrinsic feature of ribonuclease A that might be surviving remnants of folding intermediates and reflects the dynamic nature of the molecule.

Legend

Protein

Chemical

Disease

Primary Citation of related structures