2GUS

Conformational Transition between Four- and Five-stranded Phenylalanine Zippers Determined by a Local Packing Interaction

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	298	0.1M Tris-HCl, 10mM nickel chloride, 14% PEG MME2000, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
2.05	39.91

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 37.002	α = 90
b = 37.002	β = 90
c = 80.949	γ = 90

Symmetry
Space Group	P 4 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	ADSC QUANTUM 4		2005-11-21	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X4A	0.9793, 0.9796, 0.9681	NSLS	X4A

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	1.75	80.85	99.1	0.05	0.05	17	7.9	6157	6157			27.5

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	1.75	1.81	98.3		0.404	0.404	4.4	7.2	578

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.75	80.85	6157	5557	600	99.08	0.243	0.24303	0.23795	0.28702	RANDOM	38.101

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]
0.61			0.61		-1.21

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.607
r_dihedral_angle_3_deg	12.79
r_dihedral_angle_4_deg	7.993
r_dihedral_angle_1_deg	4.434
r_scangle_it	4.181
r_scbond_it	2.974
r_mcangle_it	1.701
r_angle_refined_deg	1.421
r_mcbond_it	1.105
r_symmetry_vdw_refined	0.33

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.607
r_dihedral_angle_3_deg	12.79
r_dihedral_angle_4_deg	7.993
r_dihedral_angle_1_deg	4.434
r_scangle_it	4.181
r_scbond_it	2.974
r_mcangle_it	1.701
r_angle_refined_deg	1.421
r_mcbond_it	1.105
r_symmetry_vdw_refined	0.33
r_nbtor_refined	0.319
r_symmetry_hbond_refined	0.298
r_nbd_refined	0.205
r_xyhbond_nbd_refined	0.17
r_chiral_restr	0.104
r_bond_refined_d	0.02
r_gen_planes_refined	0.014

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	364
Nucleic Acid Atoms
Solvent Atoms	25
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
ADSC	data collection
DENZO	data reduction
SCALEPACK	data scaling
SOLVE	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.