1PLC

ACCURACY AND PRECISION IN PROTEIN CRYSTAL STRUCTURE ANALYSIS: RESTRAINED LEAST-SQUARES REFINEMENT OF THE CRYSTAL STRUCTURE OF POPLAR PLASTOCYANIN AT 1.33 ANGSTROMS RESOLUTION

X-RAY DIFFRACTION

Crystallization

Crystal Properties
Matthews coefficient	Solvent content
1.9	35.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 29.6	α = 90
b = 46.86	β = 90
c = 57.6	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

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION		1.33	8	14303			0.15		0.16

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
p_scangle_it	6
p_scbond_it	3.9
p_mcangle_it	3
p_planar_tor	2.6
p_mcbond_it	2.2
p_multtor_nbd	0.199
p_singtor_nbd	0.143
p_chiral_restr	0.118
p_planar_d	0.036
p_angle_d	0.032

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1546
Nucleic Acid Atoms
Solvent Atoms	110
Heterogen Atoms	1

Software

Software
Software Name	Purpose
PROLSQ	refinement

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.