6XW2

Crystal structure of the bright genetically encoded calcium indicator NCaMP7 based on mNeonGreen fluorescent protein

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		293	0.1M Sodium acetate pH 4.6; 0.2M Ammonium sulfate; 22% PEG 2000 MME

Crystal Properties
Matthews coefficient	Solvent content
1.84	33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.9	α = 90
b = 65.7	β = 90
c = 93.02	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	MARMOSAIC 325 mm CCD		2019-05-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	KURCHATOV SNC BEAMLINE K4.4	0.79272	KURCHATOV SNC	K4.4

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim 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	1.75	37.99	100	0.158	0.165	0.998	14.54	11.355		38947			21.348

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.75	1.9	100		0.842	0.881	0.85	3.38	11.46

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	5MWC	1.75	37.99	37000	1947	99.95	0.1647	0.1632	0.1933	RANDOM	15.023

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]
-0.22			0.26		-0.03

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.247
r_dihedral_angle_4_deg	19.185
r_dihedral_angle_3_deg	13.39
r_dihedral_angle_1_deg	6.68
r_angle_refined_deg	1.812
r_angle_other_deg	1.53
r_chiral_restr	0.088
r_bond_refined_d	0.014
r_gen_planes_refined	0.01
r_gen_planes_other	0.002

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.247
r_dihedral_angle_4_deg	19.185
r_dihedral_angle_3_deg	13.39
r_dihedral_angle_1_deg	6.68
r_angle_refined_deg	1.812
r_angle_other_deg	1.53
r_chiral_restr	0.088
r_bond_refined_d	0.014
r_gen_planes_refined	0.01
r_gen_planes_other	0.002
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3061
Nucleic Acid Atoms
Solvent Atoms	357
Heterogen Atoms	460

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
MOLREP	phasing
PDB_EXTRACT	data extraction

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.