1ZVO

Semi-extended solution structure of human myeloma immunoglobulin D determined by constrained X-ray scattering

SOLUTION SCATTERING

---

Solution Scattering Data Acquistion	1
Scattering Type	x-ray
Radiation/Neutron Source	ESRF BEAMLINE ID02
Synchrotron	Y
Beamline Type	ID02
Detector Type	FRELON CCD CAMERA
Detector Manufacturer Details
Temperature (K)	288
pH	7.2
Numer of Time Frames Used	1
Protein Concentration Range (mg/mL)	0.30-0.89
Sample Buffer	12.5 MM NA PHOSPHATE, 140 MM NACL
Data Reduction Software	MULTICCD
Guiner Mean Radius Of Gyration (nm)	6.94
Sigma Mean Radius Of Gyration	0.12
R(XS-1) Mean Cross Sectional Radii (nm)	1.93
R(XS-1) Sigma Mean Cross Sectional Radii	0.04
R(XS-2) Mean Cross Sectional Radii (nm)	1.24
R(XS-2) Sigma Mean Cross Sectional Radii	0.15
P(R) Protein Length (nm)	1

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	INSIGHT II, HOMOLOGY, DISCOVERY, BIOPOLYMER, DELPHI, O, SCTPL7, GNOM	ACCELRYS		8500	1	THE MODELLED SCATTERING CURVES WERE ASSESSED BY CALCULATION OF THE RG AND RXS-1 VALUES IN THE SAME Q RANGES USED IN THE EXPERIMENTAL GUINIER FITS. MODELS WERE THEN RANKED USING A GOODNESS-OF-FIT R-FACTOR DEFINED BY ANALOGY WITH PROTEIN CRYSTALLOGRAPHY	1	HOMOLOGY MODELS WERE BUILT FOR THE FAB AND FC FRAGMENTS BY TRIAL AND ERROR CONSTRAINED MODELLING. THE POSITIONS OF THE FRAGMENTS WERE DETERMINED BY AN APPROACH THAT COMBINED RANDOMISED HINGE PEPTIDE STRUCTURES PRODUCED BY MOLECULAR DYNAMICS SIMULATIONS WITH CURVE-FITTING TO EXPERIMENTAL X-RAY SOLUTION SCATTERING DATA. A SINGLE ARRANGEMENT OF THE FAB AND FC FRAGMENTS IS PRESENTED, WHICH IS REPRESENTATIVE OF A FAMILY OF STRUCTURES THAT FIT THE SCATTERING DATA. MORE DETAILS ON THE MODELLING STRATEGY ARE CONTAINED IN THE PRIMARY REFERENCE.

Diffraction

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID2	1.	ESRF	ID2