39AJ | pdb_000039aj

Crystal structure of the CFTR inhibitory factor Cif with the H269C mutation labelled with a fluorine probe

PDB DOI: https://doi.org/10.2210/pdb39AJ/pdb

Classification: HYDROLASE
Organism(s): Pseudomonas aeruginosa UCBPP-PA14
Expression System: Escherichia coli K-12
Mutation(s): Yes

Deposited: 2026-09-25 Released: 2026-10-07
Deposition Author(s): Nie, Z., Madden, D.R.
Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.47 Å
R-Value Free:
0.172 (Depositor), 0.172 (DCC)
R-Value Work:
0.161 (Depositor), 0.161 (DCC)
R-Value Observed:
0.161 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

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Literature

Crystal structure of the CFTR inhibitory factor Cif with the H269C mutation labelled with a fluorine probe

Nie, Z., Madden, D.R.

To be published.

Macromolecule Content

Total Structure Weight: 134.04 kDa
Atom Count: 11,117
Modeled Residue Count: 1,180
Deposited Residue Count: 1,180
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CFTR inhibitory factor	A, B, C, D	295	Pseudomonas aeruginosa UCBPP-PA14	Mutation(s): 1 Gene Names: cif, PA14_26090 EC: 3.3.2.10
UniProt
Find proteins for A0A0H2ZD27 (Pseudomonas aeruginosa (strain UCBPP-PA14)) Explore A0A0H2ZD27 Go to UniProtKB: A0A0H2ZD27
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A0A0H2ZD27
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
W6Z (Subject of Investigation/LOI) Query on W6Z Download:Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain J [auth B] SDF format, chain M [auth C] SDF format, chain O [auth D] MOL2 format, chain F [auth A] MOL2 format, chain J [auth B] MOL2 format, chain M [auth C] MOL2 format, chain O [auth D] mmCIF format, chain F [auth A] mmCIF format, chain J [auth B] mmCIF format, chain M [auth C] mmCIF format, chain O [auth D]	F [auth A], J [auth B], M [auth C], O [auth D]	1,1,1-tris(fluoranyl)propane-2,2-diol C₃ H₅ F₃ O₂ BQAKXJSYMYZORI-UHFFFAOYSA-N		Interactions Focus chain F [auth A] Focus chain J [auth B] Focus chain M [auth C] Focus chain O [auth D] Interactions & Density Focus chain F [auth A] Focus chain J [auth B] Focus chain M [auth C] Focus chain O [auth D]
CA Query on CA Download:Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain H [auth A] SDF format, chain I [auth B] SDF format, chain K [auth B] SDF format, chain L [auth C] SDF format, chain N [auth C] SDF format, chain P [auth D] SDF format, chain G [auth A] MOL2 format, chain E [auth A] MOL2 format, chain H [auth A] MOL2 format, chain I [auth B] MOL2 format, chain K [auth B] MOL2 format, chain L [auth C] MOL2 format, chain N [auth C] MOL2 format, chain P [auth D] MOL2 format, chain G [auth A] mmCIF format, chain E [auth A] mmCIF format, chain H [auth A] mmCIF format, chain I [auth B] mmCIF format, chain K [auth B] mmCIF format, chain L [auth C] mmCIF format, chain N [auth C] mmCIF format, chain P [auth D] mmCIF format, chain G [auth A]	E [auth A] G [auth A] H [auth A] I [auth B] K [auth B] E [auth A], G [auth A], H [auth A], I [auth B], K [auth B], L [auth C], N [auth C], P [auth D]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth B] Focus chain K [auth B] Focus chain L [auth C] Focus chain N [auth C] Focus chain P [auth D] Interactions & Density Focus chain E [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth B] Focus chain K [auth B] Focus chain L [auth C] Focus chain N [auth C] Focus chain P [auth D]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.47 Å
R-Value Free: 0.172 (Depositor), 0.172 (DCC)
R-Value Work: 0.161 (Depositor), 0.161 (DCC)
R-Value Observed: 0.161 (Depositor)

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 167.703	α = 90
b = 83.805	β = 100.567
c = 88.991	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing
Coot	model building

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-10-07

Deposition Author(s):

Nie, Z.

Madden, D.R.

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	P20GM113132
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	P30GM165328
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)	United States	P30DK117469