SAXSdb — 2xcf

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

NS3 PROTEASE

HEPATITIS C VIRUS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	NS4A × 2 （C9WU77） ZINC ION × 2 MAGNESIUM ION × 2 ;CYCLOPENTYL N-[(2S)-1-[(2S,4R)-2-[[(4R)-8-HYDROXY-1,6,10-TRIOXA-5$L^{4}-BORASPIRO[4.5]DECAN-4-YL]CARBAMOYL]-4-ISOQUINOLIN-1-YLOXY-PYRROLIDIN-1-YL]-3,3-DIMETHYL-1-OXO-BUTAN-2-YL]CARBAMATE ; × 1 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	C1KHN2_9HEPC
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 11–190； UniProt 1–180 Author chain B； PDBConstruct 11–190； UniProt 1–180

NS4A

OrganismNot specified

UniProt C9WU77

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	NS3 PROTEASE × 2 （C1KHN2） ZINC ION × 2 MAGNESIUM ION × 2 ;CYCLOPENTYL N-[(2S)-1-[(2S,4R)-2-[[(4R)-8-HYDROXY-1,6,10-TRIOXA-5$L^{4}-BORASPIRO[4.5]DECAN-4-YL]CARBAMOYL]-4-ISOQUINOLIN-1-YLOXY-PYRROLIDIN-1-YL]-3,3-DIMETHYL-1-OXO-BUTAN-2-YL]CARBAMATE ; × 1 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	C9WU77_9HEPC
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 3–21； UniProt 21–39 Author chain D； PDBConstruct 3–21； UniProt 21–39

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	2xcf
Deposition date deposition_date	2010-04-22
Structure title title	Crystal structure of HCV NS3 protease with a boronate inhibitor
Keywords keywords	PROTEASE, BORONATE INHIBITOR, VIRAL REPRODUCTION, HYDROLASE; HYDROLASE
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.

2xcf__assembly_1__model_1

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

Download this curve (.dat)

2xcf__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2xcf__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	23.12 Å
Rg (electron density)	22.38 Å
Total Rg	23.19 Å
Atom count	2776
Residues	370
Excluded volume	49777 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2xcf__assembly_1__model_1`	tetrameric （4）	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 (6)

Entity 1 Entity 1 polymer

Description description	NS3 PROTEASE
Molecular weight formula_weight	20998.9 kDa
Mutation mutation	YES
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	2899

ASMTGGQQMGAPITAYAQQTRGLLGCIITSLTGRDKNQVEGEVQIVSTATQTFLATCINGVCWTVYHGAGTRTIASPKGPVIQMYTNVDQDLVGWPAPQGSRSLTPCTCGSSDLYLVTRHADVIPVRRRGDSRGSLLSPRPISYLKGSAGGPLLCPAGHAVGLFRAAVCTRGVAKAVDFIPVENLETTMRGSHHHHHH

Source Source

Source organism organism	HEPATITIS C VIRUS
NCBI taxonomy ID ncbi_taxonomy_id	11103
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 polymer

Description description	NS4A
Molecular weight formula_weight	2394.0 kDa
Source method src_method	syn
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,D

KKGSVVIVGRIVLSGKPAIIPKK

Entity 3 Entity 3 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	;CYCLOPENTYL N-[(2S)-1-[(2S,4R)-2-[[(4R)-8-HYDROXY-1,6,10-TRIOXA-5$L^{4}-BORASPIRO[4.5]DECAN-4-YL]CARBAMOYL]-4-ISOQUINOLIN-1-YLOXY-PYRROLIDIN-1-YL]-3,3-DIMETHYL-1-OXO-BUTAN-2-YL]CARBAMATE ;
Molecular weight formula_weight	639.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	115

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	2xcfA01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	10 — Thrombin, subunit H
Homologous superfamily homologous superfamily	120 —

Domain ID domain_id	2xcfA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	10 — Thrombin, subunit H
Homologous superfamily homologous superfamily	10 — Trypsin-like serine proteases

Domain ID domain_id	2xcfB01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	10 — Thrombin, subunit H
Homologous superfamily homologous superfamily	120 —

Domain ID domain_id	2xcfB02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	10 — Thrombin, subunit H
Homologous superfamily homologous superfamily	10 — Trypsin-like serine proteases

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Unit-cell length a length_a	225.889 Å
Unit-cell length b length_b	225.889 Å
Unit-cell length c length_c	75.196 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	36

Space group space_group	H 3 2
Space-group number int_tables_number	155
Crystal system crystal_system	—

Resolution resolution	2.480 Å
Low-resolution limit resolution_low	70.190 Å
R factor r_factor	0.1953
R_work r_work	0.1936
R_free r_free	0.2261

Crystal structure of HCV NS3 protease with a boronate inhibitor

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

NS3 PROTEASE

State in the Current Structure

Other States of the Same Protein in the Database

NS4A

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

2xcf__assembly_1__model_1

2xcf__assembly_1__model_1 | I(q)

2xcf__assembly_1__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

Crystal structure of HCV NS3 protease with a boronate inhibitor

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

NS3 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

NS4A

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

2xcf__assembly_1__model_1

2xcf__assembly_1__model_1 | I(q)

2xcf__assembly_1__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)