2NUP

Crystal Structure of the human Sec23a/24a heterodimer, complexed with the SNARE protein Sec22b

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1M2V	PDB entries 1M2V and 1IFQ
experimental model	PDB	1IFQ	PDB entries 1M2V and 1IFQ

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.9	298	10% (w/v) PEG 4000, 0.5M sodium acetate and 50 mM Tris buffer, pH 7.9, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
2.42	49.08

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 148.2	α = 90
b = 97.4	β = 90.23
c = 129.62	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	CCD	MAR CCD 165 mm	mirrors	2005-04-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X9A		NSLS	X9A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	2.6	30	97.1	0.083	0.065	5	3.01		55149

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)
	2.6	2.69	97.4		0.475			5499

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB entries 1M2V and 1IFQ	2.8	20	42329	2114	93.1	0.202	0.275	Random	39.032

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]
-0.2		9.183	2.836		-2.636

RMS Deviations
Key	Refinement Restraint Deviation
c_scangle_it	6.416
c_mcangle_it	5.377
c_scbond_it	4.651
c_mcbond_it	3.533
c_angle_deg	1.428
c_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	12419
Nucleic Acid Atoms
Solvent Atoms	220
Heterogen Atoms	2

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
CNS	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction

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.