4WYZ

The crystal structure of the A109G mutant of RNase A in complex with 3'UMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.127 
  • R-Value Observed: 0.130 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Perturbation of the Conformational Dynamics of an Active-Site Loop Alters Enzyme Activity.

Gagne, D.French, R.L.Narayanan, C.Simonovic, M.Agarwal, P.K.Doucet, N.

(2015) Structure 23: 2256-2266

  • DOI: 10.1016/j.str.2015.10.011
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The role of internal dynamics in enzyme function is highly debated. Specifically, how small changes in structure far away from the reaction site alter protein dynamics and overall enzyme mechanisms is of wide interest in protein engineering. Using RN ...

    The role of internal dynamics in enzyme function is highly debated. Specifically, how small changes in structure far away from the reaction site alter protein dynamics and overall enzyme mechanisms is of wide interest in protein engineering. Using RNase A as a model, we demonstrate that elimination of a single methyl group located >10 Å away from the reaction site significantly alters conformational integrity and binding properties of the enzyme. This A109G mutation does not perturb structure or thermodynamic stability, both in the apo and ligand-bound states. However, significant enhancement in conformational dynamics was observed for the bound variant, as probed over nano- to millisecond timescales, resulting in major ligand repositioning. These results illustrate the large effects caused by small changes in structure on long-range conformational dynamics and ligand specificities within proteins, further supporting the importance of preserving wild-type dynamics in enzyme systems that rely on flexibility for function.


    Organizational Affiliation

    INRS-Institut Armand-Frappier, Université du Québec, 531 Boulevard des Prairies, Laval, QC H7V 1B7, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, 1045 Avenue de la Médecine, Université Laval, QC G1V 0A6, Canada; GRASP, the Groupe de Recherche Axé sur la Structure des Protéines, 3649 Promenade Sir William Osler, McGill University, Montréal, QC H3G 0B1, Canada. Electronic address: nicolas.doucet@iaf.inrs.ca.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribonuclease pancreatic
A, B
125Bos taurusMutation(s): 1 
Gene Names: RNASE1RNS1
EC: 3.1.27.5 (PDB Primary Data), 4.6.1.18 (UniProt)
Find proteins for P61823 (Bos taurus)
Go to UniProtKB:  P61823
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
U3P
Query on U3P

Download CCD File 
A, B
3'-URIDINEMONOPHOSPHATE
C9 H13 N2 O9 P
FOGRQMPFHUHIGU-XVFCMESISA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
U3PKi:  78500   nM  BindingDB
U3PKi:  82000   nM  BindingDB
U3PKd:  50000   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.127 
  • R-Value Observed: 0.130 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.487α = 90
b = 51.841β = 90
c = 57.907γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM105978

Revision History 

  • Version 1.0: 2015-11-18
    Type: Initial release
  • Version 1.1: 2015-11-25
    Changes: Database references
  • Version 1.2: 2015-12-30
    Changes: Database references
  • Version 1.3: 2016-06-01
    Changes: Data collection
  • Version 1.4: 2017-09-20
    Changes: Author supporting evidence, Derived calculations
  • Version 1.5: 2019-12-25
    Changes: Author supporting evidence