Experiment: 2GIS

Structure of the S-adenosylmethionine riboswitch mRNA regulatory element

X-RAY DIFFRACTION

Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.57	52.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.901	α = 90
b = 62.901	β = 90
c = 158.967	γ = 90

Symmetry
Space Group	P 43 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 315		2005-11-11	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.10532, 1.10573	ALS	8.2.1

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	2.9	49.32	99.6	0.072	17.9	14.64	15002	14940	3	3	139.3

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)
	2.9	3.08	99.9		0.426	4.4	11.74

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2.9	49.32	13511	13415	999	99.3	0.266	0.266	0.266	0.2503	0.289	0.2749	RANDOM	69.6

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]
11.87			11.87		-23.74

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	17.3
c_scangle_it	2.61
c_mcangle_it	2.56
c_improper_angle_d	2.31
c_scbond_it	1.63
c_angle_deg	1.6
c_mcbond_it	1.38
c_bond_d	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	2029
Solvent Atoms	88
Heterogen Atoms	57

Software

Software
Software Name	Purpose
CNS	refinement
BOS	data collection
d*TREK	data scaling
CNS	phasing