1E6H

A-SPECTRIN SH3 DOMAIN A11V, M25I, V44I, V58L MUTANTS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Conformational Strain in the Hydrophobic Core and its Implications for Protein Folding and Design

Ventura, S.Vega, M.C.Lacroix, E.Angrand, I.Spagnolo, L.Serrano, L.

(2002) Nat.Struct.Mol.Biol. 9: 485

  • DOI: 10.1038/nsb799
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We have designed de novo 13 divergent spectrin SH3 core sequences to determine their folding properties. Kinetic analysis of the variants with stability similar to that of the wild type protein shows accelerated unfolding and refolding rates compatib ...

    We have designed de novo 13 divergent spectrin SH3 core sequences to determine their folding properties. Kinetic analysis of the variants with stability similar to that of the wild type protein shows accelerated unfolding and refolding rates compatible with a preferential stabilization of the transition state. This is most likely caused by conformational strain in the native state, as deletion of a methyl group (Ile-->Val) leads to deceleration in unfolding and increased stability (up to 2 kcal x mol(-1)). Several of these Ile-->Val mutants have negative phi(-U) values, indicating that some noncanonical phi(-U) values might result from conformational strain. Thus, producing a stable protein does not necessarily mean that the design process has been entirely successful. Strained interactions could have been introduced, and a reduction in the buried volume could result in a large increase in stability and a reduction in unfolding rates.


    Related Citations: 
    • Crystal Structure of a Src-Homology 3 (SH3) Domain
      Musacchio, A.,Noble, M.,Pauptit, R.,Wierenga, R.,Saraste, M.
      (1992) Nature 359: 851


    Organizational Affiliation

    European Molecular Biology Laboratory, Meyerhofstrasse 1, D-69117 Heidelberg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SPECTRIN ALPHA CHAIN
A
62Gallus gallusMutation(s): 4 
Gene Names: SPTAN1 (SPTA2)
Find proteins for P07751 (Gallus gallus)
Go to Gene View: SPTAN1
Go to UniProtKB:  P07751
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.257 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 30.040α = 90.00
b = 43.590β = 90.00
c = 53.000γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
AMoREphasing
X-PLORrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-05-23
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-04-04
    Type: Advisory, Data collection
  • Version 1.4: 2018-10-24
    Type: Data collection, Source and taxonomy