1GK9

Crystal structures of penicillin acylase enzyme-substrate complexes: Structural insights into the catalytic mechanism

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.5		pH 7.50

Crystal Properties
Matthews coefficient	Solvent content
2.27	42.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.3	α = 90
b = 131.6	β = 105.9
c = 63.9	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 300 mm plate			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE BW7B		EMBL/DESY, HAMBURG	BW7B

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	1.3	20	95.5	0.075	20.5	3.6		190229			11.8

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	1.3	1.31	82		0.244	3.4

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	1PNK	1.3	20	181046	5653	95.5	0.148	0.169	RANDOM	15.5

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_scangle_it	4.467
p_scbond_it	3.388
p_mcangle_it	1.982
p_mcbond_it	1.536
p_chiral_restr	0.128
p_planar_d	0.04
p_angle_d	0.031
p_plane_restr	0.026
p_bond_d	0.018
p_angle_deg
p_hb_or_metal_coord
p_singtor_nbd
p_multtor_nbd
p_xhyhbond_nbd
p_xyhbond_nbd
p_planar_tor
p_staggered_tor
p_orthonormal_tor
p_transverse_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6086
Nucleic Acid Atoms
Solvent Atoms	923
Heterogen Atoms	97

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing