1o8q

The active site of the molybdenum cofactor biosenthetic protein domain Cnx1G

Method: X-RAY DIFFRACTION

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

MOLYBDOPTERIN BIOSYNTHESIS CNX1 PROTEIN

ARABIDOPSIS THALIANA

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count
4	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CNX1_ARATH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–167； UniProt 462–628 Author chain B； PDBConstruct 1–167； UniProt 462–628 Author chain C； PDBConstruct 1–167； UniProt 462–628 Author chain D； PDBConstruct 1–167； UniProt 462–628 Author chain E； PDBConstruct 1–167； UniProt 462–628 Author chain F； PDBConstruct 1–167； UniProt 462–628 Author chain G； PDBConstruct 1–167； UniProt 462–628 Author chain H； PDBConstruct 1–167； UniProt 462–628

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	1o8q
Deposition date deposition_date	2002-11-28
Structure title title	The active site of the molybdenum cofactor biosenthetic protein domain Cnx1G
Keywords keywords	MOLYBDENUM COFACTOR BIOSYNTHESIS, CNX1G, MUTANTS; MOLYBDENUM COFACTOR BIOSYNTHESIS
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.

1o8q__assembly_1__model_1

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

Download this curve (.dat)

1o8q__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1o8q__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	23.72 Å
Rg (electron density)	22.56 Å
Total Rg	23.37 Å
Atom count	3540
Residues	480
Excluded volume	63966 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1o8q__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1o8q__assembly_2__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1o8q__assembly_3__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1o8q__assembly_4__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 (2)

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6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1o8qa_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.57 — Molybdenum cofactor biosynthesis proteins
Superfamily Superfamily superfamily	c.57.1 — Molybdenum cofactor biosynthesis proteins
Family Family family	c.57.1.1 — MogA-like

Domain ID domain_id	d1o8qb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.57 — Molybdenum cofactor biosynthesis proteins
Superfamily Superfamily superfamily	c.57.1 — Molybdenum cofactor biosynthesis proteins
Family Family family	c.57.1.1 — MogA-like

Domain ID domain_id	d1o8qc_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.57 — Molybdenum cofactor biosynthesis proteins
Superfamily Superfamily superfamily	c.57.1 — Molybdenum cofactor biosynthesis proteins
Family Family family	c.57.1.1 — MogA-like

Domain ID domain_id	d1o8qd_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.57 — Molybdenum cofactor biosynthesis proteins
Superfamily Superfamily superfamily	c.57.1 — Molybdenum cofactor biosynthesis proteins
Family Family family	c.57.1.1 — MogA-like

Domain ID domain_id	d1o8qe_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.57 — Molybdenum cofactor biosynthesis proteins
Superfamily Superfamily superfamily	c.57.1 — Molybdenum cofactor biosynthesis proteins
Family Family family	c.57.1.1 — MogA-like

Domain ID domain_id	d1o8qf_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.57 — Molybdenum cofactor biosynthesis proteins
Superfamily Superfamily superfamily	c.57.1 — Molybdenum cofactor biosynthesis proteins
Family Family family	c.57.1.1 — MogA-like

Domain ID domain_id	d1o8qg_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.57 — Molybdenum cofactor biosynthesis proteins
Superfamily Superfamily superfamily	c.57.1 — Molybdenum cofactor biosynthesis proteins
Family Family family	c.57.1.1 — MogA-like

Domain ID domain_id	d1o8qh_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.57 — Molybdenum cofactor biosynthesis proteins
Superfamily Superfamily superfamily	c.57.1 — Molybdenum cofactor biosynthesis proteins
Family Family family	c.57.1.1 — MogA-like

CATH v4.4 (8 domains)

Domain ID domain_id	1o8qA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	980 — Molybdenum Cofactor Biosythetic Enzyme; Chain A
Homologous superfamily homologous superfamily	10 — MoaB/Mog-like domain

Domain ID domain_id	1o8qB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	980 — Molybdenum Cofactor Biosythetic Enzyme; Chain A
Homologous superfamily homologous superfamily	10 — MoaB/Mog-like domain

Domain ID domain_id	1o8qC00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	980 — Molybdenum Cofactor Biosythetic Enzyme; Chain A
Homologous superfamily homologous superfamily	10 — MoaB/Mog-like domain

Domain ID domain_id	1o8qD00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	980 — Molybdenum Cofactor Biosythetic Enzyme; Chain A
Homologous superfamily homologous superfamily	10 — MoaB/Mog-like domain

Domain ID domain_id	1o8qE00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	980 — Molybdenum Cofactor Biosythetic Enzyme; Chain A
Homologous superfamily homologous superfamily	10 — MoaB/Mog-like domain

Domain ID domain_id	1o8qF00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	980 — Molybdenum Cofactor Biosythetic Enzyme; Chain A
Homologous superfamily homologous superfamily	10 — MoaB/Mog-like domain

Domain ID domain_id	1o8qG00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	980 — Molybdenum Cofactor Biosythetic Enzyme; Chain A
Homologous superfamily homologous superfamily	10 — MoaB/Mog-like domain

Domain ID domain_id	1o8qH00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	980 — Molybdenum Cofactor Biosythetic Enzyme; Chain A
Homologous superfamily homologous superfamily	10 — MoaB/Mog-like domain

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Unit-cell length a length_a	174.610 Å
Unit-cell length b length_b	174.610 Å
Unit-cell length c length_c	174.610 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	96

Space group space_group	P 21 3
Space-group number int_tables_number	198
Crystal system crystal_system	—

Resolution resolution	2.600 Å
Low-resolution limit resolution_low	43.850 Å
R factor r_factor	0.1950
R_work r_work	0.1930
R_free r_free	0.2280

Description description	MOLYBDOPTERIN BIOSYNTHESIS CNX1 PROTEIN
Molecular weight formula_weight	17699.5 kDa
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	9927

The active site of the molybdenum cofactor biosenthetic protein domain Cnx1G

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

MOLYBDOPTERIN BIOSYNTHESIS CNX1 PROTEIN

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

1o8q__assembly_1__model_1

1o8q__assembly_1__model_1 | I(q)

1o8q__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 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Source organism organism	ARABIDOPSIS THALIANA
Common name common_name	MOUSE-EAR CRESS
NCBI taxonomy ID ncbi_taxonomy_id	3702
Host organism host_organism	ESCHERICHIA COLI

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	487

The active site of the molybdenum cofactor biosenthetic protein domain Cnx1G

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

MOLYBDOPTERIN BIOSYNTHESIS CNX1 PROTEIN

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

1o8q__assembly_1__model_1

1o8q__assembly_1__model_1 | I(q)

1o8q__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 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)