2PZU

Crystal structure of Staphylococcal nuclease variant V66N/P117G/H124L/S128A at cryogenic temperature

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SEALED TUBE
Source details	OTHER
Temperature [K]	100
Detector technology	CCD
Collection date	2006-01-15
Detector	APEX II CCD
Wavelength(s)	1.5418
Spacegroup name	P 41
Unit cell lengths	48.220, 48.220, 62.970
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	50.000 - 2.100
R-factor	0.208
Rwork	0.211
R-free	0.26500
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	Staphylococcal nuclease V66E/P117G/H124L/S128A variant with b-factors set to 20.0 A^2 and residue 66 truncated to Ala; waters removed
Data reduction software	APEX
Phasing software	CNS
Refinement software	CNS

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	50.000	2.200
High resolution limit [Å]	2.100	2.100
Rmerge	0.014	0.068
Number of reflections	8501
<I/σ(I)>	53.72	13.36
Completeness [%]	100.0	100
Redundancy	12.64	9.17

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	7.8	277	39% MPD, 0.025 M potassium phosphate, pH 7.8, VAPOR DIFFUSION, HANGING DROP, temperature 277K