Experiment: 3KMF

Room Temperature Time-of-Flight Neutron Diffraction Study of Deoxy Human Normal Adult Hemoglobin

NEUTRON DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2DXM

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	batch	6.7	293	D2O, BATCH, ammonium sulfate, pH 6.7, batch, temperature 293K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.79	α = 90
b = 84.45	β = 99.33
c = 54.35	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	neutron	298	AREA DETECTOR	TIME-OF-FLIGHT MULTIWIRE HE3		2007-11-25	L	LAUE

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	NUCLEAR REACTOR	LANSCE BEAMLINE PCS	0.6-7.0	LANSCE	PCS

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	2	53.7	86.7	0.203	4.3	3.1		33302	2.25	1.5

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	2	2.11	74.6		0.339	1.5	2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
NEUTRON DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2DXM	2	20	2.5	24574	1192	63.9	0.25	0.3	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]

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_deg	1.034
c_bond_d	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4384
Nucleic Acid Atoms
Solvent Atoms	299
Heterogen Atoms	172

Software

Software
Software Name	Purpose
PCS	data collection
nCNS	refinement
d*TREK	data reduction
LAUENORM	data scaling
nCNS	phasing