2Q57

X-ray structure of Cerulean GFP: A tryptophan-based chromophore useful for fluorescence lifetime imaging

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5	277	100mM sodium acetate, 19% PEG 4000, 1mM EDTA, pH 5.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
1.973337	37.669037

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.232	α = 90
b = 63.339	β = 90
c = 69.821	γ = 90

Symmetry
Space Group	P 21 21 21

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		2006-04-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2	1.0000	ALS	5.0.2

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	2	20	99.5	0.082	0.082	5.1	5.7		15852		4	14.95

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	2	2.11	99.4		0.207	0.207	1.8	5.8	13288

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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 1OXD	2	19.92	15023	791	99.47	0.19172	0.18806	0.26206	RANDOM	13.245

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]
-0.38			-0.23		0.61

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.203
r_dihedral_angle_4_deg	16.214
r_dihedral_angle_3_deg	14.669
r_dihedral_angle_1_deg	7.056
r_scangle_it	4.824
r_scbond_it	3.02
r_angle_refined_deg	1.866
r_mcangle_it	1.789
r_mcbond_it	1.155
r_symmetry_hbond_refined	0.339

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.203
r_dihedral_angle_4_deg	16.214
r_dihedral_angle_3_deg	14.669
r_dihedral_angle_1_deg	7.056
r_scangle_it	4.824
r_scbond_it	3.02
r_angle_refined_deg	1.866
r_mcangle_it	1.789
r_mcbond_it	1.155
r_symmetry_hbond_refined	0.339
r_nbtor_refined	0.308
r_symmetry_vdw_refined	0.229
r_nbd_refined	0.2
r_xyhbond_nbd_refined	0.157
r_chiral_restr	0.113
r_bond_refined_d	0.017
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1789
Nucleic Acid Atoms
Solvent Atoms	149
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
ALS	data collection
MOSFLM	data reduction
SCALA	data scaling
MOLREP	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 R01GM133198.