3FCN

Crystal structure of an alpha-helical protein of unknown function (rru_a3208) from rhodospirillum rubrum atcc 11170 at 1.45 A resolution

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	277	1.0000M NaCitrate, 0.1M Cacodylate pH 6.5, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.95	58.28

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 70.707	α = 90
b = 54.561	β = 90
c = 57.25	γ = 90

Symmetry
Space Group	P 21 21 2

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 mirror (vertical focusing)	2008-11-12	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.91837,0.97882,0.97828	SSRL	BL11-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.45	26.343	100	0.082	0.082	5.67	3.6		39973			13.896

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.45	1.49	100		0.549	0.549	1.3	3.6	2899

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.45	26.343	39934	2002	99.88	0.162	0.161	0.184	RANDOM	17.817

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]
1.46			-0.16		-1.3

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.226
r_dihedral_angle_4_deg	16.694
r_dihedral_angle_3_deg	12.708
r_scangle_it	6.001
r_dihedral_angle_1_deg	4.796
r_scbond_it	3.934
r_mcangle_it	2.635
r_mcbond_it	1.63
r_angle_refined_deg	1.487
r_angle_other_deg	0.892

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.226
r_dihedral_angle_4_deg	16.694
r_dihedral_angle_3_deg	12.708
r_scangle_it	6.001
r_dihedral_angle_1_deg	4.796
r_scbond_it	3.934
r_mcangle_it	2.635
r_mcbond_it	1.63
r_angle_refined_deg	1.487
r_angle_other_deg	0.892
r_mcbond_other	0.455
r_chiral_restr	0.093
r_bond_refined_d	0.016
r_gen_planes_refined	0.008
r_gen_planes_other	0.003
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1247
Nucleic Acid Atoms
Solvent Atoms	299
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
SCALA	data scaling
PDB_EXTRACT	data extraction
MOSFLM	data reduction
SHELXD	phasing
autoSHARP	phasing

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.