1zis

Recombinant Lumazine synthase (hexagonal form)

Method: X-RAY DIFFRACTION

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

6,7-dimethyl-8-ribityllumazine synthase

Bacillus subtilis

UniProt P11998

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 5	PHOSPHATE ION × 5 5-NITRO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE × 5	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 5	PHOSPHATE ION × 5 5-NITRO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE × 5	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 60	PHOSPHATE ION × 60 5-NITRO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE × 60	Consistent with protein count
4	Protein homooligomer	Homooligomer	Protein 60	PHOSPHATE ION × 60 5-NITRO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE × 60	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RISB_BACSU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–154； UniProt 1–154 Author chain B； PDBConstruct 1–154； UniProt 1–154 Author chain C； PDBConstruct 1–154； UniProt 1–154 Author chain D； PDBConstruct 1–154； UniProt 1–154 Author chain E； PDBConstruct 1–154； UniProt 1–154 Author chain F； PDBConstruct 1–154； UniProt 1–154 Author chain G； PDBConstruct 1–154； UniProt 1–154 Author chain H； PDBConstruct 1–154； UniProt 1–154 Author chain I； PDBConstruct 1–154； UniProt 1–154 Author chain J； PDBConstruct 1–154； UniProt 1–154

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	1zis
Deposition date deposition_date	2005-04-27
Structure title title	Recombinant Lumazine synthase (hexagonal form)
Keywords keywords	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.

1zis__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1zis__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1zis__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	27.24 Å
Rg (electron density)	26.24 Å
Total Rg	27.12 Å
Atom count	5850
Residues	770
Excluded volume	103970 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1zis__assembly_1__model_1`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1zis__assembly_2__model_1`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1zis__assembly_3__model_1`	60-meric （60）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1zis__assembly_4__model_1`	60-meric （60）	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 (3)

Entity 1 Entity 1 polymer

Description description	6,7-dimethyl-8-ribityllumazine synthase
Molecular weight formula_weight	16302.6 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	11700

MNIIQGNLVGTGLKIGIVVGRFNDFITSKLLSGAEDALLRHGVDTNDIDVAWVPGAFEIPFAAKKMAETKKYDAIITLGTVIRGATTHYDYVCNEAAKGIAQAANTTGVPVIFGIVTTENIEQAIERAGTKAGNKGVDCAVSAIEMANLNRSFE

Source Source

Source organism organism	Bacillus subtilis
NCBI taxonomy ID ncbi_taxonomy_id	1423
Host organism host_organism	Bacillus subtilis

Entity 2 Entity 2 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	10

Entity 3 Entity 3 non-polymer

Description description	5-NITRO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE
Molecular weight formula_weight	306.2 kDa
Source method src_method	syn
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	d1zisa_
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	d1zisb_
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	d1zisc_
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	d1zisd_
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	d1zise_
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	d1zisf_
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	d1zisg_
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	d1zish_
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	d1zisi_
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	d1zisj_
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	1zisA00
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	1zisB00
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	1zisC00
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	1zisD00
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	1zisE00
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	1zisF00
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	1zisG00
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	1zisH00
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	1zisI00
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	1zisJ00
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	153.690 Å
Unit-cell length b length_b	153.690 Å
Unit-cell length c length_c	296.300 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	120

Space group space_group	P 63 2 2
Space-group number int_tables_number	182
Crystal system crystal_system	—

Resolution resolution	2.900 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	—
R_work r_work	0.2060
R_free r_free	0.2400

Recombinant Lumazine synthase (hexagonal form)

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

6,7-dimethyl-8-ribityllumazine 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

1zis__assembly_2__model_1

1zis__assembly_2__model_1 | I(q)

1zis__assembly_2__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (10 domains)

CATH v4.4 (10 domains)

7. Citations (4)

Recombinant Lumazine synthase (hexagonal form)

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

6,7-dimethyl-8-ribityllumazine 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

1zis__assembly_2__model_1

1zis__assembly_2__model_1 | I(q)

1zis__assembly_2__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

6. Fold Classification (SCOP + CATH) 20 domains

SCOP 2.08 (10 domains)

CATH v4.4 (10 domains)

7. Citations (4)