2Q2I

Crystal structure of the protein secretion chaperone CsaA from Agrobacterium tumefaciens.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1GD7	pdb entry 1GD7

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	294	1.8M ammonium sulfate, 0.1M HEPES pH 7.5, 2% PEG400, 5% ethylene glycol, VAPOR DIFFUSION, SITTING DROP, temperature 294K

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.81

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.653	α = 90
b = 60.653	β = 90
c = 113.389	γ = 120

Symmetry
Space Group	P 61

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS IV	VariMax Cu HF	2004-08-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU	1.54

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	1.55	52.53	99.8	0.04	23.7	10.82	34123	34123	3	3

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	1.55	1.61	99.6		0.341	7.2	10.13	3400

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1GD7	1.55	52.53	34099	34099	1727	99.7	0.18	0.178	0.208	RANDOM	7.929

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]
-0.21	-0.11		-0.21		0.32

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.975
r_dihedral_angle_4_deg	18.079
r_dihedral_angle_3_deg	10.815
r_dihedral_angle_1_deg	6.318
r_scangle_it	2.218
r_scbond_it	1.473
r_angle_refined_deg	1.282
r_mcangle_it	0.828
r_mcbond_it	0.546
r_nbtor_refined	0.312

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.975
r_dihedral_angle_4_deg	18.079
r_dihedral_angle_3_deg	10.815
r_dihedral_angle_1_deg	6.318
r_scangle_it	2.218
r_scbond_it	1.473
r_angle_refined_deg	1.282
r_mcangle_it	0.828
r_mcbond_it	0.546
r_nbtor_refined	0.312
r_nbd_refined	0.193
r_symmetry_vdw_refined	0.186
r_symmetry_hbond_refined	0.118
r_xyhbond_nbd_refined	0.111
r_chiral_restr	0.093
r_bond_refined_d	0.01
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1677
Nucleic Acid Atoms
Solvent Atoms	350
Heterogen Atoms	25

Software

Software
Software Name	Purpose
d*TREK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection
CrystalClear	data reduction
PHASER	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.