2SIV

SIV GP41 CORE STRUCTURE

Experimental procedure

Source type	ROTATING ANODE
Source details	RIGAKU RUH3R
Temperature [K]	100
Detector technology	IMAGE PLATE
Collection date	1998-05
Detector	RIGAKU RAXIS IV
Spacegroup name	P 21 21 21
Unit cell lengths	55.722, 57.713, 66.513
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	20.000 - 2.200
R-factor	0.211
Rwork	0.211
R-free	0.28800
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	1aik
RMSD bond length	0.009
RMSD bond angle	20.800 *
Data reduction software	DENZO
Data scaling software	SCALEPACK
Phasing software	X-PLOR (3.851)
Refinement software	X-PLOR (3.851)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	25.000	2.280
High resolution limit [Å]	2.200	2.200
Rmerge	0.058	0.244
Total number of observations	52353 *
Number of reflections	11157
<I/σ(I)>	23.3	5.5
Completeness [%]	96.9	88.3
Redundancy	4.9	4.5

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	Vapor diffusion, hanging drop *	6.5		PROTEIN WAS CRYSTALLIZED FROM 18-19% PEG8000, 0.1 M SODIUM CACODILATE PH 6.5, 0.2 M MG-ACETATE

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	drop	protein	10 (mg/ml)
2	1	reservoir	PEG8000	18-19 (%)
3	1	reservoir	sodium cacodylate	0.1 (M)
4	1	reservoir	magnesium acetate	0.2 (M)