Experiment: 9Q39

Structure of a sortase-linked cytochrome c peroxidase - cytochrome c fusion protein

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	AlphaFold

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.5	295	Upon purification, CcP-GGSG(2x)LPATGGG was buffer exchanged into filtered nanopure water and concentrated to 0.5 mM. Initial crystal hits were obtained using a Gryphon robot (Arts Robbins Instrument). Larger crystals were optimized via vapor diffusion in 4 microliter sitting drops, which were mixed 1:1 with well solution (14-20 % PEG 8000, 40 mM KH2PO4, 20 % glycerol, pH 3.0-5.5). Crystals growing under these conditions formed within a week.

Crystal Properties
Matthews coefficient	Solvent content
2.33	47.23

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 160.658	α = 90
b = 46.409	β = 107.397
c = 60.604	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	100	PIXEL	DECTRIS EIGER X 16M		2025-03-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-E	0.9792	APS	24-ID-E

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	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	3.24	44.42	94.4	0.257	0.315	0.179	0.967	4.4	2.7		6454			61.64

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.24	3.49	95.7		0.626	0.766	0.434	0.679

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	3.24	44.42	1.33	6422	650	92.07	0.2817	0.2759	0.2753	0.3313	0.3304	61.66

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
f_dihedral_angle_d	14.5678
f_angle_d	0.73
f_chiral_restr	0.0393
f_plane_restr	0.0046
f_bond_d	0.0035

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3263
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	91

Software

Software
Software Name	Purpose
PHENIX	refinement
RAPD	data reduction
RAPD	data scaling
PHASER	phasing