Experiment: 1CIT

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1HCQ	PDB ENTRY 1HCQ

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7		PROTEIN/DNA COMPLEX CRYSTALS WERE GROWN USING THE VAPOR DIFFUSION METHOD AT 27 DEGREES CELSIUS. THE RESEVOIR CONTAINS 50 MM MORPHOLINO-SULFONIC ACID PH7.0, 250MM AMMONIUM CHLORIDE, 30 % PEG 4000, 5 MM DTT. THE DROPS CONTAINED A 1:1 RATIO OF PROTEIN-COMPLEX TO RESEVOIR.

Crystal Properties
Matthews coefficient	Solvent content
2.4	53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.42	α = 90
b = 34.24	β = 109.13
c = 56.26	γ = 90

Symmetry
Space Group	P 1 21 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	IMAGE PLATE	MARRESEARCH	MIRROR		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X12B		NSLS	X12B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.7	18	95	0.073	14.5	2.3		5200		3	80.3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.7	2.8	96.9		0.368	3.1

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-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1HCQ	2.7	18	5200	568	95	0.219	0.22	0.295	0.3	RANDOM	32.8

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
c_dihedral_angle_d	21.6
c_scangle_it	6.34
c_mcangle_it	4.83
c_scbond_it	4.36
c_mcbond_it	3.06
c_angle_deg	2.4
c_improper_angle_d	1.78
c_bond_d	0.016
c_bond_d_na
c_bond_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	690
Nucleic Acid Atoms	650
Solvent Atoms	38
Heterogen Atoms	2

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	model building
MLPHARE	phasing
CNS	refinement
X-PLOR	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 R01GM157729.