9DT4 | pdb_00009dt4

Crystal structure of the engineered sulfonylurea repressor CsR (L4.2-20), apo form

• PDB DOI: https://doi.org/10.2210/pdb9DT4/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-09-30 Released: 2025-10-08 
• Deposition Author(s): Schreiter, E.R., Leija, C., Kakani, N.K., McBride, K.E., Looger, L.L.
• Funding Organization(s): Howard Hughes Medical Institute (HHMI)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 
  0.241 (Depositor), 0.243 (DCC) 
• R-Value Work: 
  0.178 (Depositor) 

Starting Model: experimental

Literature

Design and evolution of agrochemical-responsive gene switches for field crops

McBride, K.E., Kakani, N.K., Fang, J., Leija, C., Hermanson, F., Chan, M., Cho, H.-J., Richey, C., Madrigal, A., Gordon-Kamm, B., Lowe, K., Lenderts, B., Arling, M., Anand, A., Wang, N., Hoerster, G., McGonigle, B., Liu, Q., Falco, C.S., Lassner, M., Looger, L.L., Schreiter, E.R., Marvin, J.S., Bozhanova, N.G.

To be published.

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: 47.02 kDa 
• Atom Count: 3,218 
• Modeled Residue Count: 399 
• Deposited Residue Count: 414 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sulfonylurea repressor CsR (L4.2-20)	A, B	207	Escherichia coli	Mutation(s): 0  Gene Names: tetR
UniProt
Find proteins for P04483 (Escherichia coli) Explore P04483  Go to UniProtKB:  P04483

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free:  0.241 (Depositor), 0.243 (DCC) 
• R-Value Work:  0.178 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 37.12	α = 90
b = 56.84	β = 90.32
c = 106.007	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2025-10-08 
Deposition Author(s): Schreiter, E.R., Leija, C., Kakani, N.K., McBride, K.E., Looger, L.L.

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Funding Organization	Location	Grant Number
Howard Hughes Medical Institute (HHMI)	United States	--

Revision History  

• Version 1.0: 2025-10-08
  Type: Initial release