Experiment: 1KS8

The structure of Endoglucanase from termite, Nasutitermes takasagoensis, at pH 2.5.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3TF4	PDB ENTRY 3TF4

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	2.5	291	Ammonium Sulfate, Sodium Citrate, pH 4.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K, pH 2.5

Crystal Properties
Matthews coefficient	Solvent content
2.37	48.15

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.71	α = 90
b = 83.83	β = 95.6
c = 60.68	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	120	IMAGE PLATE	MAC Science DIP-2030K	mirrors	2000-06-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

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	1.4	30	97.7	0.062	22	9.117	87831	85117	1	3	13.6

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)
	1.4	1.45	89.7		0.543	2.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3TF4	1.4	30	87800	85085	8509	96.9	0.177	0.1955	0.191	RANDOM	15.8

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]
2.39		1.18	-0.77		-1.61

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	20.7
c_scangle_it	2.54
c_scbond_it	1.82
c_mcangle_it	1.3
c_angle_deg	1.2
c_mcbond_it	0.87
c_improper_angle_d	0.75
c_bond_d	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3383
Nucleic Acid Atoms
Solvent Atoms	729
Heterogen Atoms	5

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	phasing