2P48

Complex of a camelid single-domain vhh antibody fragment with RNASE A at 2.3A resolution: SE5B-tetra crystal form with five se-met sites (L4M, M34, M51, F68M, M83) in vhh scaffold.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	5.5	295	HAMPTON RESEARCH INDEX SCREEN, SOLUTION #66: (NH4)2SO4, PEG 3350, BIS-TRIS, PH 5.5, VAPOR DIFFUSION, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.92	57.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 42.324	α = 90
b = 42.324	β = 90
c = 352.873	γ = 90

Symmetry
Space Group	P 43 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 210	MIRRORS	2004-04-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-ID	0.97926	APS	17-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.3	20	94.9		8.4	15006	15006

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-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 2P45	2.3	20	15006	13481	1525	97.08	0.24611	0.24611	0.24054	0.29651	RANDOM	43.852

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]
3.01			3.01		-6.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.473
r_dihedral_angle_3_deg	18.088
r_dihedral_angle_4_deg	14.25
r_dihedral_angle_1_deg	7.881
r_scangle_it	3.74
r_scbond_it	2.686
r_mcangle_it	1.595
r_mcbond_it	1.271
r_angle_refined_deg	1.079
r_angle_other_deg	0.747
r_symmetry_vdw_refined	0.228
r_mcbond_other	0.228
r_nbd_refined	0.215
r_nbd_other	0.208
r_xyhbond_nbd_refined	0.174
r_symmetry_vdw_other	0.111
r_nbtor_other	0.089
r_chiral_restr	0.07
r_bond_refined_d	0.015
r_symmetry_hbond_refined	0.008
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1858
Nucleic Acid Atoms
Solvent Atoms	76
Heterogen Atoms	10

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-3000	data collection
HKL-3000	data reduction
HKL-3000	data scaling
MOLREP	phasing