1TF7 | pdb_00001tf7

Crystal Structure of Circadian Clock Protein KaiC

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	EVAPORATION, RECRYSTALLIZATION	4	291	sodium formate, glycerol, pH 4, EVAPORATION, RECRYSTALLIZATION, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.56	52

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 132.873	α = 90
b = 135.576	β = 90
c = 204.951	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	108	CCD	MARRESEARCH		2002-07-10	M	SINGLE WAVELENGTH
2	1	x-ray	108	CCD	MARRESEARCH		2003-06-01	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 5ID-B	1	APS	5ID-B
2	SYNCHROTRON	APS BEAMLINE 22-ID	1.25	APS	22-ID

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	2.8	30	99.6	0.043	20.6	9	91590	87750

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)
	2.8	2.9	99.3		0.501	2.2		8637

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	2.8	30	79746	79746	4041		0.24	0.24	0.24	0.241	0.28	0.2813	random	55

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]
-11.827			-3.378		15.204

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_d	1.38429
c_bond_d	0.008723

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	22890
Nucleic Acid Atoms
Solvent Atoms	71
Heterogen Atoms	372

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
GLRF	phasing
CNS	refinement
MLPHARE	phasing
RAVE	phasing