2ECS

Lambda Cro mutant Q27P/A29S/K32Q at 1.4 A in space group C2

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	298	80% saturated lithium sulfate, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
2.19	43.91

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 88.689	α = 90
b = 26.999	β = 103.69
c = 55.523	γ = 90

Symmetry
Space Group	C 1 2 1

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	mirrors	2006-07-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.97946	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	1.4	53.946	99.8	0.074	5.8	5.5	25562	25562			21.3

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	1.4	1.48	100		0.416	1.7	5.4	3680

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	Lambda Cro Q27P/A29S/K32Q at 1.35 A resolution in space group P3221	1.4	53.92	25561	25561	1300	99.82	0.141	0.139	0.175	RANDOM	12.014

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]
1.07		-0.4	-0.92		-0.34

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.209
r_dihedral_angle_4_deg	15.655
r_sphericity_free	15.115
r_dihedral_angle_1_deg	14.073
r_dihedral_angle_3_deg	12.578
r_sphericity_bonded	8.97
r_scangle_it	8.753
r_scbond_it	7.281
r_mcangle_it	4.362
r_mcbond_it	3.862
r_rigid_bond_restr	3.634
r_mcbond_other	2.072
r_angle_refined_deg	1.505
r_angle_other_deg	0.951
r_metal_ion_refined	0.333
r_symmetry_vdw_other	0.3
r_nbd_refined	0.229
r_symmetry_vdw_refined	0.227
r_nbd_other	0.194
r_nbtor_refined	0.184
r_symmetry_hbond_refined	0.182
r_xyhbond_nbd_refined	0.139
r_chiral_restr	0.102
r_nbtor_other	0.084
r_bond_refined_d	0.014
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	942
Nucleic Acid Atoms
Solvent Atoms	161
Heterogen Atoms	39

Software

Software
Software Name	Purpose
SCALA	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
Blu-Ice	data collection
CrystalClear	data reduction