Experiment: 9Y9Y

Crystal structure of DNA integrity scanning protein DisA from Mycobacterium tuberculosis in complex with cyclic di-AMP and bromide

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	AlphaFold	AF-P9WNW5-F1

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	291	Morpheus B12: 12.5%(v/v) MPD, 12.5%(v/v) PEG 1000, 12.5%(w/v) PEG 3350, 100 mM Tris/BICINE, pH 8.5, 30 mM NaF, 30 mM NaBr and 30 mM NaI. MytuD.17706.a.B2.PW39404 at 13.1 mg/mL. Screened as apo protein but cyclic di-AMP was bound to 4 sites likely acquired from the expression host. Larged ion modeled as a bromide was near each ligand. plate 19967 C12 drop 3, Puck: PSL-1611, Cryo: direct

Crystal Properties
Matthews coefficient	Solvent content
2.65	53.53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 279.207	α = 90
b = 74.64	β = 125.89
c = 197.795	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	DECTRIS EIGER2 XE 9M		2025-06-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS-II BEAMLINE 19-ID	0.9786	NSLS-II	19-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	3.03	49.1	99.6	0.134	0.145	0.055	0.999	11.9	6.9		64401

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.03	3.11		99.5	1.572	1.699	0.639	0.687		7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	3.03	48.83	1.34	64366	3213	99.4	0.2317	0.2298	0.2303	0.2681	0.2657

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.431
f_angle_d	0.575
f_chiral_restr	0.04
f_plane_restr	0.005
f_bond_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	19828
Nucleic Acid Atoms
Solvent Atoms	3
Heterogen Atoms	187

Software

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