1CKO | pdb_00001cko

STRUCTURE OF MRNA CAPPING ENZYME IN COMPLEX WITH THE CAP ANALOG GPPPG

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1CKM	OPEN FORM OF PDB ENTRY 1CKM

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5		HANGING DROP VAPOR DIFFUSION. 15 MG/ML PROTEIN IN 50 MM TRIS-HCL, 1.3 MM CAP ANALOG (GPPPG) 0.4 M NACL, 2 MM EDTA, 4 MM DTT, PH 7.5 WERE MIXED WITH AN EQUAL VOLUME OF AND EQUILIBRATED AGAINST 50 MM POTASSIUM PHOSPHATE, 5-10% PEG 8000, 2MM ZNCL2 PH 6.5., vapor diffusion - hanging drop

Crystal Properties
Matthews coefficient	Solvent content
4.4	72

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.476	α = 90
b = 164.013	β = 90
c = 103.502	γ = 90

Symmetry
Space Group	C 2 2 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	IMAGE PLATE	MAR scanner 300 mm plate		1997-06-20	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX7.2		SRS	PX7.2

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	3.1	20	96.8	0.035		2.9		12014			107

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT. THE ROTATION FUNCTION WAS SOLVED FOR EACH OF THE TWO DOMAINS SEPARATELY. TRANSLATION WAS PERFORMED WITH THE TWO DOMAINS INDEPENDENTLY BUT SIMULTANEOUSLY.	OPEN FORM OF PDB ENTRY 1CKM	3.1	10	11642		96.7	0.233	0.233	0.22	0.314	72

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]

RMS Deviations
Key	Refinement Restraint Deviation
x_dihedral_angle_d	24.98
x_angle_deg	3.169
x_improper_angle_d	2.575
x_bond_d	0.015
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2561
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	52

Software

Software
Software Name	Purpose
AMoRE	phasing
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling