4IRO

Crystal structure of T-state carbonmonoxy hemoglobin from Trematomus bernacchii at pH 8.4

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.4	298	deoxy-HbTb crystals have been grown using 8-9.5 mg/ml protein mixed with equal amount of 7-12 % w/v PEG 6000, PBS 100 mM, KCl 0.3 M, pH 8.4. Deoxy HbTb crystals were then soaked for several hours in a deoxygenated, CO saturated, stabilizing solution containing 30% w/v PEG 6000, 100 mM Trsi-HCl pH 8.4, 200 mM KCl, 5 mM dithionite reducing agent and flushed with gaseous CO before data collection, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
3.12	60.58

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.538	α = 90
b = 104.802	β = 90.36
c = 61.616	γ = 90

Symmetry
Space Group	P 1 21 1

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	RIGAKU SATURN 944	mirrors	2010-11-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.2	72.165				34835	34835

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	THROUGHOUT	2.2	72.165	2	34835	33316	1519		0.22	0.219		RANDOM

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4484
Nucleic Acid Atoms
Solvent Atoms	37
Heterogen Atoms	174

Software

Software
Software Name	Purpose
HKL-2000	data collection
SHELXL-97	model building
SHELXL-97	refinement
HKL-2000	data reduction
HKL-2000	data scaling
SHELXL-97	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.