9Q01 | pdb_00009q01

NowGFP mutant with non-canonical amino acid 4-(7-nitro-2,1,3-benzoxadiazolyl)-alanine (NBDO) in the chromophore site

• PDB DOI: https://doi.org/10.2210/pdb9Q01/pdb

• Classification: FLUORESCENT PROTEIN
• Organism(s): synthetic construct
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2025-08-12 Released: 2026-08-26 
• Deposition Author(s): Habel, E., Huber, T.
• Funding Organization(s): Australian Research Council (ARC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.36 Å
• R-Value Free: 
  0.190 (Depositor), 0.194 (DCC) 
• R-Value Work: 
  0.164 (Depositor), 0.174 (DCC) 
• R-Value Observed: 
  0.166 (Depositor) 

Starting Model: experimental

Literature

Site-Specific FLIM Probes via Genetic Encoding of Environmentally Responsive Benzodiazoles

Qianzhu, H., Habel, E., Butler, S.M., Abdelkader, E.H., Paul, N., Zhou, X., Otting, G., Joliffe, K.A., Huber, T.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 56.19 kDa 
• Atom Count: 4,627 
• Modeled Residue Count: 459 
• Deposited Residue Count: 496 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fluorescent protein	A, B	248	synthetic construct	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NA	C [auth A], D [auth B], E [auth B], F [auth B]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Non-standard Monomers  1 Unique
ID	Chains	Type	Formula	2D Diagram
A1CRN	A, B	L-PEPTIDE LINKING	C15 H17 N7 O7

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.36 Å
• R-Value Free:  0.190 (Depositor), 0.194 (DCC) 
• R-Value Work:  0.164 (Depositor), 0.174 (DCC) 
• R-Value Observed: 0.166 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.762	α = 90
b = 51.956	β = 90
c = 196.708	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-08-26 
Deposition Author(s): Habel, E., Huber, T.

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Funding Organization	Location	Grant Number
Australian Research Council (ARC)	Australia	DP230100079
Australian Research Council (ARC)	Australia	DP240100273
Australian Research Council (ARC)	Australia	CE200100012

Revision History  

• Version 1.0: 2026-08-26
  Type: Initial release