3K2S

Solution structure of double super helix model

SOLUTION SCATTERING

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Solution Scattering Data Acquistion	1	2
Scattering Type	neutron	neutron
Radiation/Neutron Source	ILL	ILL
Synchrotron	N	N
Beamline Type	NEUTRON CAMERA FOR REACTOR SOURCE	NEUTRON CAMERA FOR REACTOR SOURCE
Detector Type	AREA	AREA
Detector Manufacturer Details
Temperature (K)	301	301
pH	7.4	7.4
Numer of Time Frames Used	3	3
Protein Concentration Range (mg/mL)	2-4	2-4
Sample Buffer	PBS IN 12% D2O	PBS IN 42% D2O
Data Reduction Software	ILL IN-HOUSE PACKAGE	ILL IN-HOUSE PACKAGE
Guiner Mean Radius Of Gyration (nm)	5.13	3.97
Sigma Mean Radius Of Gyration	0.04	0.05
R(XS-1) Mean Cross Sectional Radii (nm)
R(XS-1) Sigma Mean Cross Sectional Radii
R(XS-2) Mean Cross Sectional Radii (nm)
R(XS-2) Sigma Mean Cross Sectional Radii
P(R) Protein Length (nm)	17.3	15.2

Solution Scattering Data Analysis and Model Fitting
Method	Software	Software Authors	Starting Model	Conformers, Number Calculated	Conformers, Number Submitted	Conformers, Selection Criteria	Best Representative Conformer	Other Details
CONSTRAINED SCATTERING FITTING OF HOMOLOGY MODELS	GROMACS, MODELLER, PYMOL, SASSIM, YALE:VOLUME/ACCESS, PRIMUS, GNOM, DAMMIN	LINDAHL E, SALI A, DELANO WL, MERZEL F, RICHARDS RM, SVERGUN DI	THE DOUBLE BELT MODEL (SEGREST JP, JBC 274, 31755 (1999))	256	1	THE MODELLED SCATTERING CURVES WERE ASSESSED BY CALCULATION OF THE RG IN THE SAME Q RANGES USED IN THE EXPERIMENTAL GUINIER FITS. MODELS WERE THEN RANKED USING A GOODNESS-OF-FIT CHI SQUARE-FACTOR DEFINED BY THE DIFFERENCE BETWEEN THE CALCULATED AND EXPERIMENTAL SCATTERING INTENSITIES AND BASED ON THE EXPERIMENTAL CURVES IN THE Q RANGE EXTENDING TO 2.4 NM-1 (PROTEIN) AND 2.1 NM-1 (LIPID).	1	AN ALL ATOM COMPUTATIONAL MODEL WAS CONSTRUCTED BY COMBINING MOLELING WITH CONRAST VARIATION SANS, HYDROGEN-DEUTERIUM EXCHANGE (H/D-MS/MS), AND DISTANCE CONSTRAINTS FROM CROSS-LINKING, FLUORESCENCE RESONANCE ENERGY TRANSFER AND ELECTRON SPIN RESONANCE. SANS LOW RESOLUTION STRUCTURES (12% AND 42% D2O) WERE USED AS SCAFFOLDS TO BUILD MOLECULAR MODELS FOR PROTEIN AND LIPID COMPONENTS OF NASCENT HDL. 256 MODELS WERE GENERATED AND ASSESSED USING GOODNESS-OF-FIT WITH BOTH SANS AND H/D-MS/MS DATA. THE NEUTRON SCATTERING CURVE I(Q) WAS CALCULATED ASSUMING ALL ATOM STRUCTURE, AND WITH CORRECTIONS FOR WAVELENGTH SPREAD AND BEAM DIVERGENCE.

Diffraction

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	NUCLEAR REACTOR	OTHER	5

Data Collection

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	5