7ZS7

Crystal structure of human cathepsin L with covalently bound calpain inhibitor VI

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	PETRA III, DESY BEAMLINE P11
Synchrotron site	PETRA III, DESY
Beamline	P11
Temperature [K]	100
Detector technology	PIXEL
Collection date	2021-12-17
Detector	DECTRIS EIGER2 X 16M
Wavelength(s)	1.033
Spacegroup name	P 1
Unit cell lengths	57.370, 62.560, 68.150
Unit cell angles	105.48, 93.43, 115.52

Refinement procedure

Resolution	44.400 - 1.600
R-factor	0.1568
Rwork	0.156
R-free	0.18770
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	3of9
RMSD bond length	0.013
RMSD bond angle	1.158
Data reduction software	XDS
Data scaling software	XSCALE
Phasing software	PHENIX (1.13-2998_9999)
Refinement software	PHENIX (1.13-2998_9999)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	44.400	1.630
High resolution limit [Å]	1.590	1.590
Rmeas	0.323	1.677
Number of reflections	101066	7218
<I/σ(I)>	12.4
Completeness [%]	93.0	89.6
Redundancy	18.4
CC(1/2)	0.997	0.840

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, SITTING DROP	4	293	Mature cathepsin L at a concentration of 7 mg/ml was equilibrated against 27% w/v PEG 8000, 1 mM TCEP and 0.1 M sodium acetate at pH 4.0. Crystals, which grew at 293 K to final size after approximately 3 days, were transferred to a compound soaking solution containing 22% w/v PEG 8000, 1 mM TCEP and 0.1 M sodium acetate at pH 4.0 as well as 5% v/v DMSO and 10% v/v PEG 400.