1IRD

Crystal Structure of Human Carbonmonoxy-Haemoglobin at 1.25 A Resolution

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1HCO	PDB ENTRY 1HCO

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	SMALL TUBES	6.7	298	potassium phosphate, pH 6.7, SMALL TUBES, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.18	43.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.27	α = 90
b = 53.27	β = 90
c = 190.78	γ = 90

Symmetry
Space Group	P 41 21 2

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	ADSC QUANTUM 4	Si(III) mirrors	2000-11-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL44B2	0.7	SPring-8	BL44B2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.25	25	100	0.061	5.8	7.6	76777	76777			20

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.25	1.32	100		0.533	1.4	6.9	11035

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R	PDB ENTRY 1HCO	1.25	25	72937	72937	3837	94.5	0.163	0.1632	0.2143	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]

Coordinate Error
Structure Solution Method	Refinement High Resolution	Refinement Low Resolution
		2606

RMS Deviations
Key	Refinement Restraint Deviation
s_approx_iso_adps	0.072
s_non_zero_chiral_vol	0.064
s_zero_chiral_vol	0.057
s_similar_adp_cmpnt	0.044
s_angle_d	0.027
s_from_restr_planes	0.0236
s_anti_bump_dis_restr	0.015
s_bond_d	0.011
s_rigid_bond_adp_cmpnt	0.004
s_similar_dist

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2192
Nucleic Acid Atoms
Solvent Atoms	325
Heterogen Atoms	90

Software

Software
Software Name	Purpose
X-PLOR	model building
SHELXL-97	refinement
MOSFLM	data reduction
CCP4	data scaling
X-PLOR	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.