SAXSdb — 1qow

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

MERSACIDIN

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 6	METHANOL × 9 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MRSA_BACSP
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–20； UniProt 49–68 Author chain B； PDBConstruct 1–20； UniProt 49–68 Author chain C； PDBConstruct 1–20； UniProt 49–68 Author chain D； PDBConstruct 1–20； UniProt 49–68 Author chain E； PDBConstruct 1–20； UniProt 49–68 Author chain F； PDBConstruct 1–20； UniProt 49–68

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	1qow
Deposition date deposition_date	1999-11-19
Structure title title	Mersacidin from Bacillus
Keywords keywords	LANTIBIOTIC, ANTIBIOTIC, METHICILLIN RESISTANCE, THIOESTER, TYPE B LANTIBIOTIC, LANTHIONINE; ANTIBIOTIC
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.

1qow__assembly_1__model_1

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

Download this curve (.dat)

1qow__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1qow__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	13.90 Å
Rg (electron density)	12.51 Å
Total Rg	13.77 Å
Atom count	768
Residues	84
Excluded volume	14352 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1qow__assembly_1__model_1`	hexameric （6）	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)

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1qowa_
Class class	j — Peptides
Fold Fold fold	j.2 — Lantibiotic peptides
Superfamily Superfamily superfamily	j.2.1 — Lantibiotic peptides
Family Family family	j.2.1.2 — Mersacidin

Domain ID domain_id	d1qowb_
Class class	j — Peptides
Fold Fold fold	j.2 — Lantibiotic peptides
Superfamily Superfamily superfamily	j.2.1 — Lantibiotic peptides
Family Family family	j.2.1.2 — Mersacidin

Domain ID domain_id	d1qowc_
Class class	j — Peptides
Fold Fold fold	j.2 — Lantibiotic peptides
Superfamily Superfamily superfamily	j.2.1 — Lantibiotic peptides
Family Family family	j.2.1.2 — Mersacidin

Domain ID domain_id	d1qowd_
Class class	j — Peptides
Fold Fold fold	j.2 — Lantibiotic peptides
Superfamily Superfamily superfamily	j.2.1 — Lantibiotic peptides
Family Family family	j.2.1.2 — Mersacidin

Domain ID domain_id	d1qowe_
Class class	j — Peptides
Fold Fold fold	j.2 — Lantibiotic peptides
Superfamily Superfamily superfamily	j.2.1 — Lantibiotic peptides
Family Family family	j.2.1.2 — Mersacidin

Domain ID domain_id	d1qowf_
Class class	j — Peptides
Fold Fold fold	j.2 — Lantibiotic peptides
Superfamily Superfamily superfamily	j.2.1 — Lantibiotic peptides
Family Family family	j.2.1.2 — Mersacidin

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Unit-cell length a length_a	46.090 Å
Unit-cell length b length_b	46.090 Å
Unit-cell length c length_c	31.020 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	18

Space group space_group	P 32
Space-group number int_tables_number	145
Crystal system crystal_system	—

Resolution resolution	1.060 Å
Low-resolution limit resolution_low	40.000 Å
R factor r_factor	0.1414
R_work r_work	—
R_free r_free	—

Description description	MERSACIDIN
Molecular weight formula_weight	1834.3 kDa
Source method src_method	nat
Copy count entity_count	6

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	825

Mersacidin from Bacillus

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

MERSACIDIN

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

1qow__assembly_1__model_1

1qow__assembly_1__model_1 | I(q)

1qow__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (6 domains)

7. Citations (1)

Description description	METHANOL
Molecular weight formula_weight	32.0 kDa
Source method src_method	syn
Copy count entity_count	9

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	57

Mersacidin from Bacillus

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

MERSACIDIN

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

1qow__assembly_1__model_1

1qow__assembly_1__model_1 | I(q)

1qow__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (6 domains)

7. Citations (1)