E.coli's putrescine receptor variant PotF/D (4JDF) with mutations E39D F88A S247D in complex with spermidine

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Fine-tuning spermidine binding modes in the putrescine binding protein PotF.

Kroger, P.Shanmugaratnam, S.Scheib, U.Hocker, B.

(2021) J Biol Chem 297: 101419-101419

  • DOI: https://doi.org/10.1016/j.jbc.2021.101419
  • Primary Citation of Related Structures:  
    7OYS, 7OYT, 7OYU, 7OYV, 7OYW, 7OYX, 7OYY, 7OYZ

  • PubMed Abstract: 

    A profound understanding of the molecular interactions between receptors and ligands is important throughout diverse research, such as protein design, drug discovery, or neuroscience. What determines specificity and how do proteins discriminate against similar ligands? In this study, we analyzed factors that determine binding in two homologs belonging to the well-known superfamily of periplasmic binding proteins, PotF and PotD. Building on a previously designed construct, modes of polyamine binding were swapped. This change of specificity was approached by analyzing local differences in the binding pocket as well as overall conformational changes in the protein. Throughout the study, protein variants were generated and characterized structurally and thermodynamically, leading to a specificity swap and improvement in affinity. This dataset not only enriches our knowledge applicable to rational protein design but also our results can further lay groundwork for engineering of specific biosensors as well as help to explain the adaptability of pathogenic bacteria.

  • Organizational Affiliation

    Department for Biochemistry, University of Bayreuth, Bayreuth, Germany; Max Planck Institute for Developmental Biology, Tübingen, Germany. Electronic address: birte.hoecker@uni-bayreuth.de.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putrescine-binding periplasmic protein
A, B
352Escherichia coliMutation(s): 6 
Gene Names: potFHPE39_07830WP7S17E04_28980
Find proteins for P31133 (Escherichia coli (strain K12))
Explore P31133 
Go to UniProtKB:  P31133
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP31133
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 3IZ

Download Ideal Coordinates CCD File 
C [auth A](2~{R})-1-[(2~{R})-1-[(2~{R})-1-(2-methoxyethoxy)propan-2-yl]oxypropan-2-yl]oxypropan-2-amine
C12 H27 N O4
SPD (Subject of Investigation/LOI)
Query on SPD

Download Ideal Coordinates CCD File 
F [auth A],
M [auth B]
C7 H19 N3
Query on 3IE

Download Ideal Coordinates CCD File 
G [auth A],
H [auth A],
N [auth B]
C4 H11 N O
Query on JFN

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
J [auth B],
K [auth B],
L [auth B]
C4 H11 N O
Query on CL

Download Ideal Coordinates CCD File 
I [auth A],
O [auth B]
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.613α = 90
b = 122.576β = 90
c = 190.32γ = 90
Software Package:
Software NamePurpose
Cootmodel building
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyHO4022/2-3

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-01
    Type: Initial release
  • Version 1.1: 2021-12-22
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Refinement description