1Y26 | pdb_00001y26

A-riboswitch-adenine complex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	277	Mg, PEG, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.2	40

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.655	α = 90
b = 155.036	β = 90
c = 25.185	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	MARRESEARCH		2004-09-20	M	SINGLE WAVELENGTH
2	1		IMAGE PLATE	RIGAKU		2004-11-08

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	1.15	NSLS	X25
2	ROTATING ANODE	RIGAKU	1.5418

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	2.1	20	97.8	0.069		10.6	11832	11832	2	1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.17	0.934

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	SIRAS	THROUGHOUT	2.1	20	1	11230	563	97.66	0.23445	0.23145	0.2445	0.29733	0.3126	RANDOM	56.777

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]
-3.33			1.66		1.66

RMS Deviations
Key	Refinement Restraint Deviation
r_angle_refined_deg	1.79
r_scangle_it	1.745
r_scbond_it	1.293
r_nbtor_refined	0.275
r_symmetry_hbond_refined	0.254
r_xyhbond_nbd_refined	0.173
r_symmetry_vdw_refined	0.159
r_nbd_refined	0.157
r_chiral_restr	0.091
r_bond_refined_d	0.016
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	1499
Solvent Atoms	94
Heterogen Atoms	15

Software

Software
Software Name	Purpose
REFMAC	refinement
CrystalClear	data reduction
HKL-2000	data scaling
SHARP	phasing