SAXSdb — 1ps1

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

PENTALENENE SYNTHASE

Streptomyces sp.

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	TRIMETHYL LEAD ION × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PTLS_STRS3
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–337； UniProt 1–336 Author chain B； PDBConstruct 2–337； UniProt 1–336

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	1ps1
Deposition date deposition_date	1997-03-23
Structure title title	PENTALENENE SYNTHASE
Keywords keywords	ANTIBIOTIC BIOSYNTHESIS, SESQUITERPENE CYCLASE, LYASE; ANTIBIOTIC 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.

1ps1__assembly_1__model_1

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

Download this curve (.dat)

1ps1__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ps1__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.54 Å
Rg (electron density)	19.29 Å
Total Rg	20.32 Å
Atom count	2426
Residues	304
Excluded volume	42335 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ps1__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1ps1__assembly_2__model_1`	monomeric （1）	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	PENTALENENE SYNTHASE
Molecular weight formula_weight	38050.4 kDa
EC 编号 ec_number	4.6.1.5
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4917

MPQDVDFHIPLPGRQSPDHARAEAEQLAWPRSLGLIRSDAAAERHLRGGYADLASRFYPHATGADLDLGVDLMSWFFLFDDLFDGPRGENPEDTKQLTDQVAAALDGPLPDTAPPIAHGFADIWRRTCEGMTPAWCARSARHWRNYFDGYVDEAESRFWNAPCDSAAQYLAMRRHTIGVQPTVDLAERAGRFEVPHRVFDSAVMSAMLQIAVDVNLLLNDIASLEKEEARGEQNNMVMILRREHGWSKSRSVSHMQNEVRARLEQYLLLESCLPKVGEIYQLDTAEREALERYRTDAVRTVIRGSYDWHRSSGRYDAEFALAAGAQGYLEELGSSAH

Source Source

Source organism organism	Streptomyces sp.
NCBI taxonomy ID ncbi_taxonomy_id	74577
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	TRIMETHYL LEAD ION
Molecular weight formula_weight	252.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	66

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1ps1a_
Class class	a — All alpha proteins
Fold Fold fold	a.128 — Terpenoid synthases
Superfamily Superfamily superfamily	a.128.1 — Terpenoid synthases
Family Family family	a.128.1.4 — Aristolochene/pentalenene synthase

Domain ID domain_id	d1ps1b_
Class class	a — All alpha proteins
Fold Fold fold	a.128 — Terpenoid synthases
Superfamily Superfamily superfamily	a.128.1 — Terpenoid synthases
Family Family family	a.128.1.4 — Aristolochene/pentalenene synthase

CATH v4.4 (2 domains)

Domain ID domain_id	1ps1A00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	600 — Farnesyl Diphosphate Synthase
Homologous superfamily homologous superfamily	10 — Farnesyl Diphosphate Synthase

Domain ID domain_id	1ps1B00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	600 — Farnesyl Diphosphate Synthase
Homologous superfamily homologous superfamily	10 — Farnesyl Diphosphate Synthase

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Unit-cell length a length_a	178.720 Å
Unit-cell length b length_b	178.720 Å
Unit-cell length c length_c	56.620 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	12

Space group space_group	P 63
Space-group number int_tables_number	173
Crystal system crystal_system	—

Resolution resolution	2.600 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.1980
R_work r_work	0.1980
R_free r_free	0.2730

PENTALENENE SYNTHASE

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

PENTALENENE 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

1ps1__assembly_1__model_1

1ps1__assembly_1__model_1 | I(q)

1ps1__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (3)

PENTALENENE SYNTHASE

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

PENTALENENE 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

1ps1__assembly_1__model_1

1ps1__assembly_1__model_1 | I(q)

1ps1__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (3)