2HQK

Crystal structure of a monomeric cyan fluorescent protein derived from Clavularia

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.1	295	Mixed 2 uL of protein (56 mg/mL) with 2 uL of well solution. Protein buffer: 20 mM Hepes pH 7.9, 300 mM NaCl. Well solution: 10% Ethanol, 0.1 M Sodium acetate, pH 5.1, and 65 mM Zinc Acetate, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.07	40.64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.83	α = 90
b = 38.02	β = 90.81
c = 61.119	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	ADSC QUANTUM 315		2006-06-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 14-BM-C	0.90000	APS	14-BM-C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.19	50	98			65393	65393	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	1.19	1.22	97.4

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R	PDB ID 1ZUX	1.19	10	65393	61768	3257	93.2	0.149	0.149	0.137	0.206	RANDOM

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]

Coordinate Error
Structure Solution Method	Refinement High Resolution	Refinement Low Resolution
29		2028.85

RMS Deviations
Key	Refinement Restraint Deviation
s_approx_iso_adps	0.098
s_non_zero_chiral_vol	0.091
s_zero_chiral_vol	0.09
s_similar_adp_cmpnt	0.048
s_from_restr_planes	0.033
s_angle_d	0.031
s_anti_bump_dis_restr	0.028
s_bond_d	0.014
s_rigid_bond_adp_cmpnt	0.005
s_similar_dist

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1714
Nucleic Acid Atoms
Solvent Atoms	336
Heterogen Atoms	8

Software

Software
Software Name	Purpose
SHELX	model building
SHELXL-97	refinement
HKL-2000	data reduction
HKL-2000	data scaling
SHELX	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.