5LO4

Engineering protein stability with atomic precision in a monomeric miniprotein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Engineering protein stability with atomic precision in a monomeric miniprotein.

Baker, E.G.Williams, C.Hudson, K.L.Bartlett, G.J.Heal, J.W.Porter Goff, K.L.Sessions, R.B.Crump, M.P.Woolfson, D.N.

(2017) Nat. Chem. Biol. 13: 764-770

  • DOI: 10.1038/nchembio.2380
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Miniproteins simplify the protein-folding problem, allowing the dissection of forces that stabilize protein structures. Here we describe PPα-Tyr, a designed peptide comprising an α-helix buttressed by a polyproline II helix. PPα-Tyr is water soluble ...

    Miniproteins simplify the protein-folding problem, allowing the dissection of forces that stabilize protein structures. Here we describe PPα-Tyr, a designed peptide comprising an α-helix buttressed by a polyproline II helix. PPα-Tyr is water soluble and monomeric, and it unfolds cooperatively with a midpoint unfolding temperature (T M ) of 39 °C. NMR structures of PPα-Tyr reveal proline residues docked between tyrosine side chains, as designed. The stability of PPα is sensitive to modifications in the aromatic residues: replacing tyrosine with phenylalanine, i.e., changing three solvent-exposed hydroxyl groups to protons, reduces the T M to 20 °C. We attribute this result to the loss of CH-π interactions between the aromatic and proline rings, which we probe by substituting the aromatic residues with nonproteinogenic side chains. In analyses of natural protein structures, we find a preference for proline-tyrosine interactions over other proline-containing pairs, and observe abundant CH-π interactions in biologically important complexes between proline-rich ligands and SH3 and similar domains.


    Organizational Affiliation

    School of Chemistry, University of Bristol, Bristol, UK.,School of Biochemistry, University of Bristol, Bristol, UK.,BrisSynBio, University of Bristol, Bristol, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PPa-CH3
A
36Streptococcus mutans serotype c (strain ATCC 700610 / UA159)Mutation(s): 0 
Gene Names: spaP
Find proteins for P23504 (Streptococcus mutans serotype c (strain ATCC 700610 / UA159))
Go to UniProtKB:  P23504
Small Molecules
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

--

4PH
Query on 4PH
A
L-peptide linkingC10 H13 N O2PHE
ACE
Query on ACE
A
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
Software Package:
Software NamePurpose
ARIArefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
ERASynBioUnited KingdomBB/M005615/1

Revision History 

  • Version 1.0: 2017-05-17
    Type: Initial release
  • Version 1.1: 2017-05-31
    Type: Database references
  • Version 1.2: 2017-06-28
    Type: Database references
  • Version 1.3: 2019-05-08
    Type: Data collection