3PA0 | pdb_00003pa0

Crystal Structure of Chiral Gamma-PNA with Complementary DNA Strand: Insight Into the Stability and Specificity of Recognition an Conformational Preorganization

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	295	sample of 5mg/mL at 50 mM Tris pH7.5, 0.1 mM ZnSO4; well solution 20% w/v PEG-8000, 0.1 M Tris pH 8.5 and 0.2 M MgCl2, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
3.28	62.45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.19	α = 90
b = 52.57	β = 90
c = 61.15	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	93	CCD	MARMOSAIC 300 mm CCD	Si(111) monochromator	2007-12-07	M	MAD
2	1	x-ray		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	1.27196	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	1.6	30.72	91.2	0.068		6.5	19186	19186		-3

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)
	1.6	1.66	64		0.44	2.1	4.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	AB INITIO	FREE R	1.6	10	4	19721	19141	958		0.2179	0.2022	0.2009	0.21	0.2287	0.2	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
		1031.83

RMS Deviations
Key	Refinement Restraint Deviation
s_similar_dist	0.078
s_similar_adp_cmpnt	0.075
s_anti_bump_dis_restr	0.074
s_angle_d	0.029
s_from_restr_planes	0.0185
s_bond_d	0.01
s_non_zero_chiral_vol	0.008
s_zero_chiral_vol
s_rigid_bond_adp_cmpnt
s_approx_iso_adps

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	418
Nucleic Acid Atoms	404
Solvent Atoms	189
Heterogen Atoms	22

Software

Software
Software Name	Purpose
HKL-2000	data collection
SHELX	model building
SHELXL-97	refinement
HKL-2000	data reduction
SCALEPACK	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 R01GM157729.