1LSQ

RIBONUCLEASE A WITH ASN 67 REPLACED BY A BETA-ASPARTYL RESIDUE

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
1.98	38

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62	α = 90
b = 37.8	β = 96.42
c = 46.66	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	291	DIFFRACTOMETER	BRUKER NONIUS CAD4		1994-04-01	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1

Data Collection

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 5RSA	1.9	20	1	17221	16618		96.7	0.159			13.3

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]

RMS Deviations
Key	Refinement Restraint Deviation
p_planar_tor	5.1
p_scangle_it	3.378
p_scbond_it	2.244
p_mcangle_it	1.394
p_mcbond_it	0.943
p_singtor_nbd	0.219
p_multtor_nbd	0.177
p_xyhbond_nbd	0.154
p_chiral_restr	0.147
p_planar_d	0.043
p_angle_d	0.033
p_bond_d	0.017
p_plane_restr	0.009
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_staggered_tor
p_orthonormal_tor
p_transverse_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1900
Nucleic Acid Atoms
Solvent Atoms	114
Heterogen Atoms	10

Software

Software
Software Name	Purpose
MOLEN	data collection
MOLEN	data reduction
X-PLOR	model building
PROLSQ	refinement
X-PLOR	refinement
MOLEN	data scaling
X-PLOR	phasing