Experiment: 8X8K

Crystal structure of STBD1 CBM20 domain in complex with maltotetraose

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	AlphaFold

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		289	0.09 M Halogens (0.3M Sodium fluoride; 0.3M Sodium bromide; 0.3M Sodium iodide), 0.1 M Buffer System 1 (Imidazole; MES (acid) pH 6.5), 37.5% v/v Precipitant Mix 4 (25% v/v MPD (racemic); 25% PEG 1000; 25% w/v PEG 3350)

Crystal Properties
Matthews coefficient	Solvent content
2.86	56.96

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.879	α = 90
b = 74.879	β = 90
c = 163.087	γ = 120

Symmetry
Space Group	P 32 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	CCD	ADSC QUANTUM 315r		2022-08-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRF BEAMLINE BL10U2	0.97903	SSRF	BL10U2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	2.1	64.574	100	0.113	12.7	13.7		67178			48.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.168	2.206			0.78

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	AlphaFold	2.1	41.66	1.37	31875	1581	99.96	0.1885	0.1865	0.198	0.2263	0.1917	57.33

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	7.945
f_angle_d	1.1456
f_chiral_restr	0.0706
f_bond_d	0.0086
f_plane_restr	0.0084

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3188
Nucleic Acid Atoms
Solvent Atoms	113
Heterogen Atoms	288

Software

Software
Software Name	Purpose
PHENIX	refinement
AutoProcess	data reduction
AutoProcess	data scaling
PHENIX	phasing