2REQ

METHYLMALONYL-COA MUTASE, NON-PRODUCTIVE COA COMPLEX, IN OPEN CONFORMATION REPRESENTING SUBSTRATE-FREE STATE

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1REQ	PDB ENTRY 1REQ

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	7.5		PROTEIN SOLUTION: 20 MG/ML PROTEIN, 1MM ADENOSYLCOBALAMIN, 2MM COA, 1MM DTT, TRIS -HCL PH 7.5. RESERVOIR SOLUTION: 17.5% (W/V) PEG4000, 20% GLYCEROL (V/V), 100MM TRIS-HCL PH 7.5. EQUAL VOLUMES OF PROTEIN SOLUTION WERE MIXED AND EQUILIBRATED BY VAPOR DIFFUSION., vapor diffusion

Crystal Properties
Matthews coefficient	Solvent content
2.8	56

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 104.95	α = 90
b = 162.06	β = 108.75
c = 104.2	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	100	IMAGE PLATE	MAR scanner 180 mm plate	TOROIDAL MIRROR, SI MONOCHROMATOR	1995-07-09	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ELETTRA BEAMLINE 5.2R		ELETTRA	5.2R

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	2.5	20	99.8	0.092	6	4.8		113512		3.5	55

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	2.5	2.64	99.7		0.338	2.1	3.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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	THROUGHOUT	PDB ENTRY 1REQ	2.5	20	113303	4538	99.6	0.259	0.325	RANDOM	47

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_transverse_tor	34.4
p_staggered_tor	19.8
p_planar_tor	5.9
p_scangle_it	5.102
p_mcangle_it	3.74
p_scbond_it	3.713
p_mcbond_it	2.424
p_multtor_nbd	0.17
p_chiral_restr	0.141
p_singtor_nbd	0.129
p_xyhbond_nbd	0.128
p_planar_d	0.046
p_angle_d	0.041
p_plane_restr	0.03
p_bond_d	0.012
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	20360
Nucleic Acid Atoms
Solvent Atoms	636
Heterogen Atoms	244

Software

Software
Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling