3X22

Crystal structure of Escherichia coli nitroreductase NfsB mutant N71S/F123A/F124W

• PDB DOI: https://doi.org/10.2210/pdb3X22/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2014-12-06 Released: 2015-11-18 
• Deposition Author(s): Bai, J., Yang, J., Zhou, Y., Yang, Q.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.242 
• R-Value Work: 0.206 
• R-Value Observed: 0.209 

Starting Model: experimental

Literature

Structural basis of Escherichia coli nitroreductase NfsB triple mutants engineered for improved activity and regioselectivity toward the prodrug CB1954

Bai, J., Yang, J., Zhou, Y., Yang, Q.

(2015) Process Biochem 50: 1760-1766

• DOI: https://doi.org/10.1016/j.procbio.2015.08.012

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 53 kDa 
• Atom Count: 3,651 
• Modelled Residue Count: 434 
• Deposited Residue Count: 474 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Oxygen-insensitive NAD(P)H nitroreductase	A, B	237	Escherichia coli K-12	Mutation(s): 3  Gene Names: nfnB, dprA, nfsB, nfsI, ntr EC: 1.5.1.34 (PDB Primary Data), 1 (UniProt)
UniProt
Find proteins for P38489 (Escherichia coli (strain K12)) Explore P38489  Go to UniProtKB:  P38489

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FMN	C [auth A], D [auth B]	FLAVIN MONONUCLEOTIDE C17 H21 N4 O9 P FVTCRASFADXXNN-SCRDCRAPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.242 
• R-Value Work: 0.206 
• R-Value Observed: 0.209 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.075	α = 90
b = 57.075	β = 90
c = 263.611	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-11-18 
Deposition Author(s): Bai, J., Yang, J., Zhou, Y., Yang, Q.

Revision History  

• Version 1.0: 2015-11-18
  Type: Initial release
  
• Version 1.1: 2023-11-08
  Changes: Data collection, Database references, Derived calculations, Refinement description