3Q24

X-ray crystal structure of the N4 mini-VRNAP and P2_7a promoter transcription initiation complex with pppGpG and pyrophosphate: product complex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	HANGING DROP	8	294	0.1 M TRIS-HCL, 0.21 M DIBASIC AMMONIUM CITRATE, 0.09 M AMMONIUM DIHYDROGEN MONOPHOSPHATE, 25% (DROP) 21.5-22% (RESERVOIR) PEG 3350, pH 8.0, HANGING DROP, temperature 294K

Crystal Properties
Matthews coefficient	Solvent content
2.41	48.96

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 83.459	α = 90
b = 111.79	β = 90
c = 277.009	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	CCD	ADSC QUANTUM 315		2006-11-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25		NSLS	X25

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	1.8	50	99.7	0.072	10.5	5.9	233493	233493	1	1

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)
	1.8	1.86	98.7		0.728		4.2

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1.81	41.49	233362	233362	11698	98.9	0.202	0.202	0.201	0.235	RANDOM	32.61

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]
1.03			-0.14		-0.89

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.062
r_dihedral_angle_4_deg	16.76
r_dihedral_angle_3_deg	14.905
r_dihedral_angle_1_deg	5.187
r_scangle_it	2.152
r_scbond_it	1.401
r_angle_refined_deg	1.096
r_mcangle_it	0.94
r_mcbond_it	0.726
r_nbtor_refined	0.296
r_symmetry_vdw_refined	0.194
r_nbd_refined	0.19
r_xyhbond_nbd_refined	0.112
r_symmetry_hbond_refined	0.11
r_chiral_restr	0.075
r_bond_refined_d	0.007
r_gen_planes_refined	0.003
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	16897
Nucleic Acid Atoms	881
Solvent Atoms	2399
Heterogen Atoms	83

Software

Software
Software Name	Purpose
REFMAC	refinement
CNS	refinement
CBASS	data collection
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing