SAXSdb — 1pb0

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

Hypothetical protein ycdX

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	ZINC ION × 9 SULFATE ION × 4 FORMIC ACID × 6 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	YCDX_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–245； UniProt 1–245 Author chain B； PDBConstruct 1–245； UniProt 1–245 Author chain C； PDBConstruct 1–245； UniProt 1–245

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	1pb0
Deposition date deposition_date	2003-05-14
Structure title title	YCDX PROTEIN IN AUTOINHIBITED STATE
Keywords keywords	structural genomics, beta-alpha-barrel, trinuclear zinc, autoinhibition, UNKNOWN FUNCTION; STRUCTURAL GENOMICS, UNKNOWN FUNCTION
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.

1pb0__assembly_1__model_1

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

Download this curve (.dat)

1pb0__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1pb0__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.12 Å
Rg (electron density)	27.29 Å
Total Rg	27.91 Å
Atom count	5479
Residues	703
Excluded volume	97577 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1pb0__assembly_1__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 (5)

Entity 1 Entity 1 polymer

Description description	Hypothetical protein ycdX
Molecular weight formula_weight	26925.5 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	6181

MYPVDLHMHTVASTHAYSTLSDYIAQAKQKGIKLFAITDHGPDMEDAPHHWHFINMRIWPRVVDGVGILRGIEANIKNVDGEIDCSGKMFDSLDLIIAGFHEPVFAPHDKATNTQAMIATIASGNVHIISHPGNPKYEIDVKAVAEAAAKHQVALEINNSSFLHSRKGSEDNCREVAAAVRDAGGWVALGSDSHTAFTMGEFEECLKILDAVDFPPERILNVSPRRLLNFLESRGMAPIAEFADL

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 non-polymer

Description description	FORMIC ACID
Molecular weight formula_weight	46.0 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	699

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1pb0a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.6 — 7-stranded beta/alpha barrel
Superfamily Superfamily superfamily	c.6.3 — PHP domain-like
Family Family family	c.6.3.1 — PHP domain

Domain ID domain_id	d1pb0b_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.6 — 7-stranded beta/alpha barrel
Superfamily Superfamily superfamily	c.6.3 — PHP domain-like
Family Family family	c.6.3.1 — PHP domain

Domain ID domain_id	d1pb0c_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.6 — 7-stranded beta/alpha barrel
Superfamily Superfamily superfamily	c.6.3 — PHP domain-like
Family Family family	c.6.3.1 — PHP domain

CATH v4.4 (3 domains)

Domain ID domain_id	1pb0A00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	140 — Metal-dependent hydrolases

Domain ID domain_id	1pb0B00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	140 — Metal-dependent hydrolases

Domain ID domain_id	1pb0C00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	140 — Metal-dependent hydrolases

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Unit-cell length a length_a	134.130 Å
Unit-cell length b length_b	77.330 Å
Unit-cell length c length_c	82.280 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	103.17 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	1.950 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	—
R_work r_work	0.1640
R_free r_free	—

YCDX PROTEIN IN AUTOINHIBITED STATE

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

Hypothetical protein ycdX

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

1pb0__assembly_1__model_1

1pb0__assembly_1__model_1 | I(q)

1pb0__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 (5)

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 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (2)

YCDX PROTEIN IN AUTOINHIBITED STATE

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

Hypothetical protein ycdX

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

1pb0__assembly_1__model_1

1pb0__assembly_1__model_1 | I(q)

1pb0__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 (5)

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 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (2)