1c41

CRYSTAL STRUCTURES OF A PENTAMERIC FUNGAL AND AN ICOSAHEDRAL PLANT LUMAZINE SYNTHASE REVEALS THE STRUCTURAL BASIS FOR DIFFERENCES IN ASSEMBLY

Method: X-RAY DIFFRACTION

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

LUMAZINE SYNTHASE

Magnaporthe grisea

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 5	SULFATE ION × 10 5-NITROSO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE × 5 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 5	SULFATE ION × 10 5-NITROSO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE × 5 water × 3	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 10	SULFATE ION × 20 5-NITROSO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE × 10 water × 5	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RIB4_MAGGR
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–200； UniProt 1–200 Author chain B； PDBConstruct 1–200； UniProt 1–200 Author chain C； PDBConstruct 1–200； UniProt 1–200 Author chain D； PDBConstruct 1–200； UniProt 1–200 Author chain E； PDBConstruct 1–200； UniProt 1–200 Author chain F； PDBConstruct 1–200； UniProt 1–200 Author chain G； PDBConstruct 1–200； UniProt 1–200 Author chain H； PDBConstruct 1–200； UniProt 1–200 Author chain I； PDBConstruct 1–200； UniProt 1–200 Author chain J； PDBConstruct 1–200； UniProt 1–200

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	1c41
Deposition date deposition_date	1999-08-03
Structure title title	CRYSTAL STRUCTURES OF A PENTAMERIC FUNGAL AND AN ICOSAHEDRAL PLANT LUMAZINE SYNTHASE REVEALS THE STRUCTURAL BASIS FOR DIFFERENCES IN ASSEMBLY
Keywords keywords	RIBOFLAVIN BIOSYNTHESIS, TRANSFERASE; TRANSFERASE
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.

1c41__assembly_1__model_1

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

Download this curve (.dat)

1c41__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1c41__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	27.48 Å
Rg (electron density)	26.24 Å
Total Rg	27.17 Å
Atom count	6365
Residues	825
Excluded volume	112700 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1c41__assembly_1__model_1`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1c41__assembly_2__model_1`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1c41__assembly_3__model_1`	decameric （10）	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 (4)

Entity 1 Entity 1 polymer

Description description	LUMAZINE SYNTHASE
Molecular weight formula_weight	21093.9 kDa
EC 编号 ec_number	2.5.1.78
Source method src_method	man
Copy count entity_count	10

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H,I,J
Atom count atom_count	12740

MHTKGPTPQQHDGSALRIGIVHARWNETIIEPLLAGTKAKLLACGVKESNIVVQSVPGSWELPIAVQRLYSASQLQTPSSGPSLSAGDLLGSSTTDLTALPTTTASSTGPFDALIAIGVLIKGETMHFEYIADSVSHGLMRVQLDTGVPVIFGVLTVLTDDQAKARAGVIEGSHNHGEDWGLAAVEMGVRRRDWAAGKTE

Source Source

Source organism organism	Magnaporthe grisea
NCBI taxonomy ID ncbi_taxonomy_id	148305
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	20

Entity 3 Entity 3 non-polymer

Description description	5-NITROSO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE
Molecular weight formula_weight	290.2 kDa
Source method src_method	syn
Copy count entity_count	10

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	10

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6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (10 domains)

Domain ID domain_id	d1c41a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41b_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41c_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41d_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41e_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41f_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41g_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41h_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41i_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

Domain ID domain_id	d1c41j_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.16 — Lumazine synthase
Superfamily Superfamily superfamily	c.16.1 — Lumazine synthase
Family Family family	c.16.1.1 — Lumazine synthase

CATH v4.4 (10 domains)

Domain ID domain_id	1c41A00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41B00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41C00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41D00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41E00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41F00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41G00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41H00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41I00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

Domain ID domain_id	1c41J00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	960 — Lumazine/riboflavin synthase

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Unit-cell length a length_a	98.800 Å
Unit-cell length b length_b	124.700 Å
Unit-cell length c length_c	141.400 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	40

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	3.100 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2480
R_work r_work	0.2480
R_free r_free	0.2710

CRYSTAL STRUCTURES OF A PENTAMERIC FUNGAL AND AN ICOSAHEDRAL PLANT LUMAZINE SYNTHASE REVEALS THE STRUCTURAL BASIS FOR DIFFERENCES IN ASSEMBLY

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

LUMAZINE SYNTHASE

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

1c41__assembly_1__model_1

1c41__assembly_1__model_1 | I(q)

1c41__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (10 domains)

CATH v4.4 (10 domains)

7. Citations (1)

CRYSTAL STRUCTURES OF A PENTAMERIC FUNGAL AND AN ICOSAHEDRAL PLANT LUMAZINE SYNTHASE REVEALS THE STRUCTURAL BASIS FOR DIFFERENCES IN ASSEMBLY

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

LUMAZINE SYNTHASE

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

1c41__assembly_1__model_1

1c41__assembly_1__model_1 | I(q)

1c41__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (10 domains)

CATH v4.4 (10 domains)

7. Citations (1)