5VHT

E. coli chorismate mutase with orthogonal interface containing p-benzoyl phenylalanine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Generation of an Orthogonal Protein-Protein Interface with a Noncanonical Amino Acid.

Koh, M.Nasertorabi, F.Han, G.W.Stevens, R.C.Schultz, P.G.

(2017) J. Am. Chem. Soc. 139: 5728-5731

  • DOI: 10.1021/jacs.7b02273

  • PubMed Abstract: 
  • We have engineered the protein interface of the Escherichia coli chorismate mutase (EcCM) homodimer to be dependent on incorporation of a noncanonical amino acid (ncAA) at residue 72. The large hydrophobic amino acid p-benzoyl phenylalanine (pBzF) wa ...

    We have engineered the protein interface of the Escherichia coli chorismate mutase (EcCM) homodimer to be dependent on incorporation of a noncanonical amino acid (ncAA) at residue 72. The large hydrophobic amino acid p-benzoyl phenylalanine (pBzF) was substituted for Tyr72, which led to a catalytically inactive protein. A library of five residues (Leu25', Arg29', Leu76, Ile80' and Asp83') surrounding pBzF72 was generated and subjected to a growth based selection in a chorismate mutase deficient strain. An EcCM variant (Phe25', pBzF72, Thr76, Gly80' and Tyr83') forms a stable homodimer, has catalytic activity similar to the wild type enzyme, and unfolds with a Tm of 53 °C. The X-ray crystal structure reveals a pi-pi stacking and hydrogen bonding interactions that stabilize the new protein interface. The strategy described here should be useful for generating organisms that are dependent on the presence of a ncAA for growth.


    Organizational Affiliation

    Department of Chemistry and Skaggs Institute for Chemical Biology, The Scripps Research Institute , 10550 N Torrey Pines Road, La Jolla, California 92037, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chorismate Mutase
A, B
99Escherichia coli (strain K12)Mutation(s): 5 
Gene Names: pheA
Find proteins for P0A9J8 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A9J8
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PBF
Query on PBF
A, B
L-PEPTIDE LINKINGC16 H15 N O3PHE
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.861α = 90.00
b = 61.270β = 90.00
c = 62.848γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
SCALAdata scaling
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Department of Energy (United States)United StatesDE-SC0011787
Korean Ministry of EducationKorea, Republic OfNRF- 210 2016R1A6A3A03009203

Revision History 

  • Version 1.0: 2017-05-10
    Type: Initial release
  • Version 1.1: 2017-09-27
    Type: Author supporting evidence, Refinement description