2EWE

Crystal structure of Pectate Lyase C R218K mutant in complex with pentagalacturonic acid

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	9.5	277	Grown in 1.0 M ammonium sulfate, 50 mM HEPES. VAPOR DIFFUSION, SITTING DROP, temperature 277K. Crystals then transferred to a solution at pH 9.5 containing cryogenic agents, 7 mM calcium and 50mM penta-galacturonopyranose, and left to soak for 30 hours.

Crystal Properties
Matthews coefficient	Solvent content
3.54	65.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.14	α = 90
b = 78.32	β = 90
c = 94.43	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	103	IMAGE PLATE	MARRESEARCH		1996-12-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1	1.08	SSRL	BL7-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	2.15	23.76	95.9	0.031	11.8		28523	28523			22.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	THROUGHOUT	pectate lyase C, PDB entry 1AIR, with arg 218 omitted	2.2	10	2	26662	26512	2638	96.5	0.186	0.233	random	13.4

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
x_angle_deg	1.54
x_improper_angle_d	1.17
x_bond_d	0.0006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2646
Nucleic Acid Atoms
Solvent Atoms	328
Heterogen Atoms	53

Software

Software
Software Name	Purpose
X-PLOR	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
CCP4	data scaling
X-PLOR	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.