SAXSdb — 3cg8

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

laccase

Streptomyces coelicolor

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	COPPER (II) ION × 12 OXYGEN ATOM × 3 TETRAETHYLENE GLYCOL × 5 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9XAL8_STRCO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–343； UniProt 1–343 Author chain B； PDBConstruct 1–343； UniProt 1–343 Author chain C； PDBConstruct 1–343； UniProt 1–343

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	3cg8
Deposition date deposition_date	2008-03-05
Structure title title	Laccase from Streptomyces coelicolor
Keywords keywords	two-domain laccase, oxidoreductase, multicopper blue protein; OXIDOREDUCTASE
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.

3cg8__assembly_1__model_1

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

Download this curve (.dat)

3cg8__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3cg8__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.99 Å
Rg (electron density)	26.16 Å
Total Rg	26.99 Å
Atom count	6388
Residues	814
Excluded volume	111610 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3cg8__assembly_1__model_1`	trimeric （3）	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 (5)

Entity 1 Entity 1 polymer

Description description	laccase
Molecular weight formula_weight	36932.0 kDa
EC 编号 ec_number	1.10.3.2
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	6752

MDRRGFNRRVLLGGAAAATSLSIAPEVAGAAPAAKGITARTAPAGGEVRHLKMYAEKLADGQMGYGFEKGKASVPGPLIEVNEGDTLHIEFTNTMDVRASLHVHGLDYEISSDGTAMNKSDVEPGGTRTYTWRTHKPGRRDDGTWRPGSAGYWHYHDHVVGTEHGTGGIRNGLYGPVIVRRKGDVLPDATHTIVFNDMTINNRKPHTGPDFEATVGDRVEIVMITHGEYYHTFHMHGHRWADNRTGILTGPDDPSRVIDNKITGPADSFGFQIIAGEGVGAGAWMYHCHVQSHSDMGMVGLFLVKKPDGTIPGYEPHEHGGATAKSGESGEPTGGAAAHEHEH

Source Source

Source organism organism	Streptomyces coelicolor
NCBI taxonomy ID ncbi_taxonomy_id	1902
Host organism host_organism	Aspergillus oryzae

Entity 2 Entity 2 non-polymer

Description description	COPPER (II) ION
Molecular weight formula_weight	63.5 kDa
Source method src_method	syn
Copy count entity_count	12

Entity 3 Entity 3 non-polymer

Description description	OXYGEN ATOM
Molecular weight formula_weight	16.0 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 4 Entity 4 non-polymer

Description description	TETRAETHYLENE GLYCOL
Molecular weight formula_weight	194.2 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	360

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6. Fold Classification (SCOP + CATH) 6 domains

CATH v4.4 (6 domains)

Domain ID domain_id	3cg8A01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	420 — Cupredoxins - blue copper proteins

Domain ID domain_id	3cg8A02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	420 — Cupredoxins - blue copper proteins

Domain ID domain_id	3cg8B01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	420 — Cupredoxins - blue copper proteins

Domain ID domain_id	3cg8B02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	420 — Cupredoxins - blue copper proteins

Domain ID domain_id	3cg8C01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	420 — Cupredoxins - blue copper proteins

Domain ID domain_id	3cg8C02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	420 — Cupredoxins - blue copper proteins

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Unit-cell length a length_a	180.868 Å
Unit-cell length b length_b	180.868 Å
Unit-cell length c length_c	177.111 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	24

Space group space_group	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	2.679 Å
Low-resolution limit resolution_low	28.540 Å
R factor r_factor	0.1720
R_work r_work	0.1720
R_free r_free	0.1940

Laccase from Streptomyces coelicolor

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

laccase

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

3cg8__assembly_1__model_1

3cg8__assembly_1__model_1 | I(q)

3cg8__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

CATH v4.4 (6 domains)

7. Citations (2)

Laccase from Streptomyces coelicolor

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

laccase

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

3cg8__assembly_1__model_1

3cg8__assembly_1__model_1 | I(q)

3cg8__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

CATH v4.4 (6 domains)

7. Citations (2)