1YH9

T-to-T(High) quaternary transitions in human hemoglobin: HbA OXY (2MM IHP, 20% PEG) (10 test sets)

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	ROTATING ANODE
Source details	RIGAKU RU200
Temperature [K]	169
Detector technology	IMAGE PLATE
Collection date	2000-12-14
Detector	RIGAKU RAXIS IV
Wavelength(s)	1.5418
Spacegroup name	P 21 21 2
Unit cell lengths	97.100, 99.600, 66.100
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	10.000 - 2.200
R-factor	0.19424
Rwork	0.190
R-free	0.23589
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	1rq3
RMSD bond length	0.013
RMSD bond angle	1.255
Data reduction software	MOSFLM
Data scaling software	SCALA
Phasing software	X-PLOR
Refinement software	REFMAC (5.0)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	34.770	2.370
High resolution limit [Å]	2.200	2.200
Rmerge	0.073	0.266
Number of reflections	31525
<I/σ(I)>	4.7	3.3
Completeness [%]	93.7	87.7
Redundancy	3.1	2.7

Crystallization Conditions

crystal ID	method	pH	temperature	details
1				10% PEG 6000, 10 MM POTASSIUM PHOSPHATE, 100 MM POTASSIUM CHLORIDE, 3 MM SODIUM DITHIONITE, 10 MG/ML DEOXYHB, PH 7.0, BATCH, TEMPERATURE 298K, 1 ATM N2. EXPOSING DEOXY CRYSTAL TO LIGAND: A DEOXY CRYSTAL WAS SOAKED (UNDER 1 ATM NITROGEN) IN SUBSTITUTE MOTHER LIQUOR CONTAINING 20% PEG 6000, 10 MM POTASSIUM PHOSPHATE (PH 7.0), 100 MM POTASSIUM CHLORIDE, AND 2.2 MM IHP. THE IHP-STABILIZED CRYSTAL WAS THEN EXPOSED TO 1 ATM OF OXYGEN AT 177K AND DATA WAS COLLECTED AT 169K.