3CU3 | pdb_00003cu3

Crystal structure of a domain of unknown function with a cystatin-like fold (npun_r1993) from nostoc punctiforme pcc 73102 at 2.00 A resolution

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.47	277	NANODROP, 0.2M Magnesium chloride, 36.0% PEG 400, 0.1M HEPES pH 7.47, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.76	55.38

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 50.51	α = 90
b = 71.9	β = 90
c = 117.56	γ = 90

Symmetry
Space Group	I 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	100	CCD	MARMOSAIC 325 mm CCD	Flat collimating mirror, toroid focusing mirror	2008-03-17	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.91837, 0.97905, 0.97929	SSRL	BL9-2

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	29.386	98.8	0.087	7.97	3.61		14803		-3	17.709

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	2.07	97.8		0.38	2.26

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2	29.386	14802	751	99.61	0.164	0.161	0.17	0.216	0.22	RANDOM	15.479

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]
-0.66			1.46		-0.79

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.725
r_dihedral_angle_4_deg	13.752
r_dihedral_angle_3_deg	12.773
r_scangle_it	8.132
r_dihedral_angle_1_deg	6.983
r_scbond_it	5.56
r_mcangle_it	3.243
r_mcbond_it	2.063
r_angle_refined_deg	1.556
r_angle_other_deg	1.048

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.725
r_dihedral_angle_4_deg	13.752
r_dihedral_angle_3_deg	12.773
r_scangle_it	8.132
r_dihedral_angle_1_deg	6.983
r_scbond_it	5.56
r_mcangle_it	3.243
r_mcbond_it	2.063
r_angle_refined_deg	1.556
r_angle_other_deg	1.048
r_mcbond_other	0.612
r_chiral_restr	0.092
r_bond_refined_d	0.017
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1262
Nucleic Acid Atoms
Solvent Atoms	145
Heterogen Atoms	24

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SOLVE	phasing
MolProbity	model building
XSCALE	data scaling
PDB_EXTRACT	data extraction
MAR345	data collection
XDS	data reduction

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.