7XHV

Crystal Structure of the NPAS4-ARNT heterodimer in complex with DNA

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	SSRF BEAMLINE BL19U1
Synchrotron site	SSRF
Beamline	BL19U1
Temperature [K]	100
Detector technology	PIXEL
Collection date	2021-02-04
Detector	SIEMENS-NICOLET
Wavelength(s)	0.97846
Spacegroup name	P 43 21 2
Unit cell lengths	72.846, 72.846, 272.741
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	31.074 - 3.996
R-factor	0.2751
Rwork	0.273
R-free	0.33060
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	4zpk
Data reduction software	HKL-3000
Data scaling software	HKL-2000
Phasing software	PHASER
Refinement software	PHENIX (1.13_2998)

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	50.000	50.000	4.070
High resolution limit [Å]	3.996	10.820	4.000
Rmerge	0.111	0.066	0.813
Rmeas	0.115	0.069	0.840
Rpim	0.029	0.019	0.206
Number of reflections	6850	418	338
<I/σ(I)>	5.2
Completeness [%]	99.9	99.3	100
Redundancy	16.2	12.3	15.9
CC(1/2)		0.998	0.926

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION	8	289	ammonium tartrate dibasic, PEG3350