1gn2

S123C mutant of the iron-superoxide dismutase from Mycobacterium tuberculosis.

Method: X-RAY DIFFRACTION

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

SUPEROXIDE DISMUTASE

MYCOBACTERIUM TUBERCULOSIS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	FE (III) ION × 4	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 4	FE (III) ION × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SODF_MYCTU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–207； UniProt 1–207 Author chain B； PDBConstruct 1–207； UniProt 1–207 Author chain C； PDBConstruct 1–207； UniProt 1–207 Author chain D； PDBConstruct 1–207； UniProt 1–207 Author chain E； PDBConstruct 1–207； UniProt 1–207 Author chain F； PDBConstruct 1–207； UniProt 1–207 Author chain G； PDBConstruct 1–207； UniProt 1–207 Author chain H； PDBConstruct 1–207； UniProt 1–207

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	1gn2
Deposition date deposition_date	2001-10-02
Structure title title	S123C mutant of the iron-superoxide dismutase from Mycobacterium tuberculosis.
Keywords keywords	OXIDOREDUCTASE, IRON; 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.

1gn2__assembly_1__model_1

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

Download this curve (.dat)

1gn2__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1gn2__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)	25.68 Å
Total Rg	26.59 Å
Atom count	6276
Residues	792
Excluded volume	110790 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1gn2__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1gn2__assembly_2__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 (2)

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6. Fold Classification (SCOP + CATH) 32 domains

SCOP 2.08 (16 domains)

Domain ID domain_id	d1gn2a1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.11 — Fe,Mn superoxide dismutase (SOD), N-terminal domain
Family Family family	a.2.11.1 — Fe,Mn superoxide dismutase (SOD), N-terminal domain

Domain ID domain_id	d1gn2a2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.44 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Superfamily Superfamily superfamily	d.44.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Family Family family	d.44.1.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain

Domain ID domain_id	d1gn2b1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.11 — Fe,Mn superoxide dismutase (SOD), N-terminal domain
Family Family family	a.2.11.1 — Fe,Mn superoxide dismutase (SOD), N-terminal domain

Domain ID domain_id	d1gn2b2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.44 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Superfamily Superfamily superfamily	d.44.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Family Family family	d.44.1.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain

Domain ID domain_id	d1gn2c1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.11 — Fe,Mn superoxide dismutase (SOD), N-terminal domain
Family Family family	a.2.11.1 — Fe,Mn superoxide dismutase (SOD), N-terminal domain

Domain ID domain_id	d1gn2c2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.44 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Superfamily Superfamily superfamily	d.44.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Family Family family	d.44.1.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain

Domain ID domain_id	d1gn2d1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.11 — Fe,Mn superoxide dismutase (SOD), N-terminal domain
Family Family family	a.2.11.1 — Fe,Mn superoxide dismutase (SOD), N-terminal domain

Domain ID domain_id	d1gn2d2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.44 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Superfamily Superfamily superfamily	d.44.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Family Family family	d.44.1.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain

Domain ID domain_id	d1gn2e1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.11 — Fe,Mn superoxide dismutase (SOD), N-terminal domain
Family Family family	a.2.11.1 — Fe,Mn superoxide dismutase (SOD), N-terminal domain

Domain ID domain_id	d1gn2e2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.44 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Superfamily Superfamily superfamily	d.44.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Family Family family	d.44.1.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain

Domain ID domain_id	d1gn2f1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.11 — Fe,Mn superoxide dismutase (SOD), N-terminal domain
Family Family family	a.2.11.1 — Fe,Mn superoxide dismutase (SOD), N-terminal domain

Domain ID domain_id	d1gn2f2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.44 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Superfamily Superfamily superfamily	d.44.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Family Family family	d.44.1.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain

Domain ID domain_id	d1gn2g1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.11 — Fe,Mn superoxide dismutase (SOD), N-terminal domain
Family Family family	a.2.11.1 — Fe,Mn superoxide dismutase (SOD), N-terminal domain

Domain ID domain_id	d1gn2g2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.44 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Superfamily Superfamily superfamily	d.44.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Family Family family	d.44.1.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain

Domain ID domain_id	d1gn2h1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.11 — Fe,Mn superoxide dismutase (SOD), N-terminal domain
Family Family family	a.2.11.1 — Fe,Mn superoxide dismutase (SOD), N-terminal domain

Domain ID domain_id	d1gn2h2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.44 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Superfamily Superfamily superfamily	d.44.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain
Family Family family	d.44.1.1 — Fe,Mn superoxide dismutase (SOD), C-terminal domain

CATH v4.4 (16 domains)

Domain ID domain_id	1gn2A01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	990 — Fe,Mn superoxide dismutase (SOD) domain

Domain ID domain_id	1gn2A02
Class class	3 — Alpha Beta
Architecture architecture	55 — 3-Layer(bab) Sandwich
Topology topology	40 — minor pseudopilin epsh fold
Homologous superfamily homologous superfamily	20 — Iron/manganese superoxide dismutase, C-terminal domain

Domain ID domain_id	1gn2B01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	990 — Fe,Mn superoxide dismutase (SOD) domain

Domain ID domain_id	1gn2B02
Class class	3 — Alpha Beta
Architecture architecture	55 — 3-Layer(bab) Sandwich
Topology topology	40 — minor pseudopilin epsh fold
Homologous superfamily homologous superfamily	20 — Iron/manganese superoxide dismutase, C-terminal domain

Domain ID domain_id	1gn2C01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	990 — Fe,Mn superoxide dismutase (SOD) domain

Domain ID domain_id	1gn2C02
Class class	3 — Alpha Beta
Architecture architecture	55 — 3-Layer(bab) Sandwich
Topology topology	40 — minor pseudopilin epsh fold
Homologous superfamily homologous superfamily	20 — Iron/manganese superoxide dismutase, C-terminal domain

Domain ID domain_id	1gn2D01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	990 — Fe,Mn superoxide dismutase (SOD) domain

Domain ID domain_id	1gn2D02
Class class	3 — Alpha Beta
Architecture architecture	55 — 3-Layer(bab) Sandwich
Topology topology	40 — minor pseudopilin epsh fold
Homologous superfamily homologous superfamily	20 — Iron/manganese superoxide dismutase, C-terminal domain

Domain ID domain_id	1gn2E01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	990 — Fe,Mn superoxide dismutase (SOD) domain

Domain ID domain_id	1gn2E02
Class class	3 — Alpha Beta
Architecture architecture	55 — 3-Layer(bab) Sandwich
Topology topology	40 — minor pseudopilin epsh fold
Homologous superfamily homologous superfamily	20 — Iron/manganese superoxide dismutase, C-terminal domain

Domain ID domain_id	1gn2F01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	990 — Fe,Mn superoxide dismutase (SOD) domain

Domain ID domain_id	1gn2F02
Class class	3 — Alpha Beta
Architecture architecture	55 — 3-Layer(bab) Sandwich
Topology topology	40 — minor pseudopilin epsh fold
Homologous superfamily homologous superfamily	20 — Iron/manganese superoxide dismutase, C-terminal domain

Domain ID domain_id	1gn2G01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	990 — Fe,Mn superoxide dismutase (SOD) domain

Domain ID domain_id	1gn2G02
Class class	3 — Alpha Beta
Architecture architecture	55 — 3-Layer(bab) Sandwich
Topology topology	40 — minor pseudopilin epsh fold
Homologous superfamily homologous superfamily	20 — Iron/manganese superoxide dismutase, C-terminal domain

Domain ID domain_id	1gn2H01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	990 — Fe,Mn superoxide dismutase (SOD) domain

Domain ID domain_id	1gn2H02
Class class	3 — Alpha Beta
Architecture architecture	55 — 3-Layer(bab) Sandwich
Topology topology	40 — minor pseudopilin epsh fold
Homologous superfamily homologous superfamily	20 — Iron/manganese superoxide dismutase, C-terminal domain

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Unit-cell length a length_a	103.080 Å
Unit-cell length b length_b	106.330 Å
Unit-cell length c length_c	76.100 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	92.37 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	16

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	3.400 Å
Low-resolution limit resolution_low	21.000 Å
R factor r_factor	—
R_work r_work	0.2490
R_free r_free	0.2700

Description description	SUPEROXIDE DISMUTASE
Molecular weight formula_weight	23076.9 kDa
EC 编号 ec_number	1.15.1.1
Mutation mutation	YES
Source method src_method	man
Copy count entity_count	8

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H
Atom count atom_count	12552

S123C mutant of the iron-superoxide dismutase from Mycobacterium tuberculosis.

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

SUPEROXIDE DISMUTASE

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

1gn2__assembly_1__model_1

1gn2__assembly_1__model_1 | I(q)

1gn2__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

6. Fold Classification (SCOP + CATH) 32 domains

SCOP 2.08 (16 domains)

CATH v4.4 (16 domains)

7. Citations (2)

Source organism organism	MYCOBACTERIUM TUBERCULOSIS
NCBI taxonomy ID ncbi_taxonomy_id	1773
Host organism host_organism	MYCOBACTERIUM VACCAE

Description description	FE (III) ION
Molecular weight formula_weight	55.8 kDa
Source method src_method	syn
Copy count entity_count	8

S123C mutant of the iron-superoxide dismutase from Mycobacterium tuberculosis.

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

SUPEROXIDE DISMUTASE

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

1gn2__assembly_1__model_1

1gn2__assembly_1__model_1 | I(q)

1gn2__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

6. Fold Classification (SCOP + CATH) 32 domains

SCOP 2.08 (16 domains)

CATH v4.4 (16 domains)

7. Citations (2)