3LR6 | pdb_00003lr6

Self-assembly of spider silk proteins is controlled by a pH-sensitive relay

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION			Ammonium sulphate, PEG 400, VAPOR DIFFUSION

Crystal Properties
Matthews coefficient	Solvent content
2.34	47.34

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 68.67	α = 90
b = 68.67	β = 90
c = 97.342	γ = 120

Symmetry
Space Group	P 32 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		CCD	ADSC QUANTUM 315			M	SINGLE WAVELENGTH
2	1
3	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-2		ESRF	ID14-2
2	SYNCHROTRON	ESRF BEAMLINE ID23-1		ESRF	ID23-1
3	SYNCHROTRON	ESRF BEAMLINE ID23-2		ESRF	ID23-2

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	2.2	59.44		0.089	7.4	4.5		12619		2.2	27.1

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)
	2.2	2.257			0.345	2.2	2.9	1538

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.2	59.4	12619	664	95.17	0.20929	0.20737	0.2168	0.24794	0.2535	RANDOM	13.122

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]
0.63	0.31		0.63		-0.94

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.936
r_dihedral_angle_3_deg	14.142
r_dihedral_angle_4_deg	13.885
r_scbond_it	8.09
r_scangle_it	7.793
r_mcbond_it	6.865
r_mcangle_it	6.449
r_dihedral_angle_1_deg	4.872
r_angle_refined_deg	1.333
r_nbtor_refined	0.291
r_symmetry_vdw_refined	0.252
r_symmetry_hbond_refined	0.225
r_nbd_refined	0.218
r_xyhbond_nbd_refined	0.14
r_chiral_restr	0.107
r_bond_refined_d	0.014
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1852
Nucleic Acid Atoms
Solvent Atoms	62
Heterogen Atoms	10

Software

Software
Software Name	Purpose
REFMAC	refinement