1HKQ | pdb_00001hkq

PPS10 plasmid DNA replication initiator protein RepA. Replication inactive, dimeric N-terminal domain.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.2	295	VAPOUR DIFFUSION (HANGING DROPS), WELLS: 500 MICROLITRES (14% PEG4000, 6% MPD), DROPS: 5 MICROLITRES PROTEIN (5 MG/ML IN 50 MM K2HPO4/ KH2PO4, PH= 6.2),5 MICROLITRES WELL SOL. PLUS 1 MICROLITRE OF P-CL-MERCURIBENZOATE (=1 MM IN WATER), THIN LARGE CRYSTAL PRISMS APPEAR AT 295 DEGREES KELVIN IN 1 MONTH., pH 6.20

Crystal Properties
Matthews coefficient	Solvent content
2.26	45.17

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.866	α = 90
b = 55.533	β = 90
c = 96.073	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	IMAGE PLATE	MARRESEARCH		2000-07-15	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X31	1.0090, 1.0120	EMBL/DESY, HAMBURG	X31

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	2.75	48.2	97.7	0.081	8	5.2		8343		2.1	45.9

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)
1	2.75	2.9	97.8		0.32	2.1	5.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	2.75	27.89	7421	806	96.6	0.238	0.238	0.26	0.272	0.29	RANDOM	48.1

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]
5.08			6.99		-12.08

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.6
c_angle_deg	1.4
c_improper_angle_d	0.89
c_bond_d	0.008
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot
c_mcbond_it
c_mcangle_it
c_scbond_it
c_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2026
Nucleic Acid Atoms
Solvent Atoms	30
Heterogen Atoms	31

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
CNS	phasing
SHARP	phasing
CNS	refinement