SAXSdb — 9x7i

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1. Protein Identity and Related Structures Protein Identity & Related Structures

3C-like protease

Canine coronavirus 2

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	;(1~{R},2~{S},5~{S})-~{N}-[(2~{S})-1-azanylidene-3-[(3~{S})-2-oxidanylidenepyrrolidin-3-yl]propan-2-yl]-3-[(2~{S})-3,3-dimethyl-2-(methylsulfonylamino)butanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide ; × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	;(1~{R},2~{S},5~{S})-~{N}-[(2~{S})-1-azanylidene-3-[(3~{S})-2-oxidanylidenepyrrolidin-3-yl]propan-2-yl]-3-[(2~{S})-3,3-dimethyl-2-(methylsulfonylamino)butanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide ; × 2 water × 2	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 2	;(1~{R},2~{S},5~{S})-~{N}-[(2~{S})-1-azanylidene-3-[(3~{S})-2-oxidanylidenepyrrolidin-3-yl]propan-2-yl]-3-[(2~{S})-3,3-dimethyl-2-(methylsulfonylamino)butanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide ; × 2 water × 2	Consistent with protein count
4	Protein homooligomer	Homooligomer	Protein 2	;(1~{R},2~{S},5~{S})-~{N}-[(2~{S})-1-azanylidene-3-[(3~{S})-2-oxidanylidenepyrrolidin-3-yl]propan-2-yl]-3-[(2~{S})-3,3-dimethyl-2-(methylsulfonylamino)butanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide ; × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A8F2ZG71_9ALPC
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–302； UniProt 2881–3182 Author chain B； PDBConstruct 1–302； UniProt 2881–3182 Author chain C； PDBConstruct 1–302； UniProt 2881–3182 Author chain D； PDBConstruct 1–302； UniProt 2881–3182 Author chain E； PDBConstruct 1–302； UniProt 2881–3182 Author chain F； PDBConstruct 1–302； UniProt 2881–3182 Author chain G； PDBConstruct 1–302； UniProt 2881–3182 Author chain H； PDBConstruct 1–302； UniProt 2881–3182

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	9x7i
Deposition date deposition_date	2025-10-16
Structure title title	Crystal of CCoV-HuPn-2018 3CL protease (3CLpro) in complex with compound 3
Keywords keywords	Protease, Mpro, Viral protein-inhibitor complex, VIRAL PROTEIN; VIRAL PROTEIN
Experimental Method method	X-RAY DIFFRACTION

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

9x7i__assembly_4__model_1

Assembly 4 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

9x7i__assembly_4__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9x7i__assembly_4__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	25.72 Å
Rg (electron density)	24.60 Å
Total Rg	25.37 Å
Atom count	4010
Residues	557
Excluded volume	69747 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9x7i__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`9x7i__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`9x7i__assembly_3__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`9x7i__assembly_4__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Description description	3C-like protease
Molecular weight formula_weight	33037.3 kDa
Source method src_method	man
Copy count entity_count	8

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H
Atom count atom_count	17407

SGLRKMAQPSGLVEPCIVRVSYGNNVLNGLWLGDEVICPRHVIASDTTRVINYENEMSSVRLHNFSVSKNNVFLGVVSAKYKGVNLVLKVNQVNPNTPEHKFKSIKAGESFNILACYEGCPGSVYGVNMRSQGTIKGSFIAGTCGSVGYVSENATLYFVYMHHLELGNGSHVGSNLEGEMYGGYEDQPSMQLEGTNVMSSDNVVAFLYAALINGERWFVTNTSMSLESYNTWAKTNSFTELSSTDAFSMLAAKTGQSVEKLLDSIVRLNKGFGGRTILSYGSLCDEFTPTEVIRQMYGVNLQ

Source Source

Source organism organism	Canine coronavirus 2
NCBI taxonomy ID ncbi_taxonomy_id	2185079
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	;(1~{R},2~{S},5~{S})-~{N}-[(2~{S})-1-azanylidene-3-[(3~{S})-2-oxidanylidenepyrrolidin-3-yl]propan-2-yl]-3-[(2~{S})-3,3-dimethyl-2-(methylsulfonylamino)butanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide ;
Molecular weight formula_weight	483.6 kDa
Source method src_method	syn
Copy count entity_count	8

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	154

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Unit-cell length a length_a	159.119 Å
Unit-cell length b length_b	125.566 Å
Unit-cell length c length_c	158.604 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.76 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	32

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.230 Å
Low-resolution limit resolution_low	31.720 Å
R factor r_factor	0.2389
R_work r_work	0.2368
R_free r_free	0.2804

Crystal of CCoV-HuPn-2018 3CL protease (3CLpro) in complex with compound 3

1. Protein Identity and Related Structures Protein Identity & Related Structures

3C-like protease

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

9x7i__assembly_4__model_1

9x7i__assembly_4__model_1 | I(q)

9x7i__assembly_4__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

7. Citations (1)

Crystal of CCoV-HuPn-2018 3CL protease (3CLpro) in complex with compound 3

1. Protein Identity and Related Structures Protein Identity & Related Structures

3C-like protease

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

9x7i__assembly_4__model_1

9x7i__assembly_4__model_1 | I(q)

9x7i__assembly_4__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

7. Citations (1)