1l8a

E. COLI PYRUVATE DEHYDROGENASE

Method: X-RAY DIFFRACTION

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

Pyruvate dehydrogenase E1 component

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	MAGNESIUM ION × 2 THIAMINE DIPHOSPHATE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ODP1_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–886； UniProt 1–886 Author chain B； PDBConstruct 1–886； UniProt 1–886

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	1l8a
Deposition date deposition_date	2002-03-19
Structure title title	E. COLI PYRUVATE DEHYDROGENASE
Keywords keywords	THIAMIN DIPHOSPHATE, PYRUVATE, ALPHA-KETO ACID DEHYDROGENASE, OXIDOREDUCTASE; OXIDOREDUCTASE
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.

1l8a__assembly_1__model_1

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

Download this curve (.dat)

1l8a__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1l8a__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	34.14 Å
Rg (electron density)	33.26 Å
Total Rg	33.84 Å
Atom count	12736
Residues	1602
Excluded volume	225280 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1l8a__assembly_1__model_1`	dimeric （2）	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	Pyruvate dehydrogenase E1 component
Molecular weight formula_weight	99657.2 kDa
EC 编号 ec_number	1.2.4.1
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	13418

SERFPNDVDPIETRDWLQAIESVIREEGVERAQYLIDQLLAEARKGGVNVAAGTGISNYINTIPVEEQPEYPGNLELERRIRSAIRWNAIMTVLRASKKDLELGGHMASFQSSATIYDVCFNHFFRARNEQDGGDLVYFQGHISPGVYARAFLEGRLTQEQLDNFRQEVHGNGLSSYPHPKLMPEFWQFPTVSMGLGPIGAIYQAKFLKYLEHRGLKDTSKQTVYAFLGDGEMDEPESKGAITIATREKLDNLVFVINCNLQRLDGPVTGNGKIINELEGIFEGAGWNVIKVMWGSRWDELLRKDTSGKLIQLMNETVDGDYQTFKSKDGAYVREHFFGKYPETAALVADWTDEQIWALNRGGHDPKKIYAAFKKAQETKGKATVILAHTIKGYGMGDAAEGKNIAHQVKKMNMDGVRHIRDRFNVPVSDADIEKLPYITFPEGSEEHTYLHAQRQKLHGYLPSRQPNFTEKLELPSLQDFGALLEEQSKEISTTIAFVRALNVMLKNKSIKDRLVPIIADEARTFGMEGLFRQIGIYSPNGQQYTPQDREQVAYYKEDEKGQILQEGINELGAGCSWLAAATSYSTNNLPMIPFYIYYSMFGFQRIGDLCWAAGDQQARGFLIGGTSGRTTLNGEGLQHEDGHSHIQSLTIPNCISYDPAYAYEVAVIMHDGLERMYGEKQENVYYYITTLNENYHMPAMPEGAEEGIRKGIYKLETIEGSKGKVQLLGSGSILRHVREAAEILAKDYGVGSDVYSVTSFTELARDGQDCERWNMLHPLETPRVPYIAQVMNDAPAVASTDYMKLFAEQVRTYVPADDYRVLGTDGFGRSDSRENLRHHFEVDASYVVVAALGELAKRGEIDKKVVADAIAKFNIDADKVNPRLA

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	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	THIAMINE DIPHOSPHATE
Molecular weight formula_weight	425.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	682

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1l8aa1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.36 — Thiamin diphosphate-binding fold (THDP-binding)
Superfamily Superfamily superfamily	c.36.1 — Thiamin diphosphate-binding fold (THDP-binding)
Family Family family	c.36.1.10 — TK-like PP module

Domain ID domain_id	d1l8aa2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.36 — Thiamin diphosphate-binding fold (THDP-binding)
Superfamily Superfamily superfamily	c.36.1 — Thiamin diphosphate-binding fold (THDP-binding)
Family Family family	c.36.1.6 — TK-like Pyr module

Domain ID domain_id	d1l8aa3
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.48 — TK C-terminal domain-like
Superfamily Superfamily superfamily	c.48.1 — TK C-terminal domain-like
Family Family family	c.48.1.1 — Transketolase C-terminal domain-like

Domain ID domain_id	d1l8ab1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.36 — Thiamin diphosphate-binding fold (THDP-binding)
Superfamily Superfamily superfamily	c.36.1 — Thiamin diphosphate-binding fold (THDP-binding)
Family Family family	c.36.1.10 — TK-like PP module

Domain ID domain_id	d1l8ab2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.36 — Thiamin diphosphate-binding fold (THDP-binding)
Superfamily Superfamily superfamily	c.36.1 — Thiamin diphosphate-binding fold (THDP-binding)
Family Family family	c.36.1.6 — TK-like Pyr module

Domain ID domain_id	d1l8ab3
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.48 — TK C-terminal domain-like
Superfamily Superfamily superfamily	c.48.1 — TK C-terminal domain-like
Family Family family	c.48.1.1 — Transketolase C-terminal domain-like

CATH v4.4 (6 domains)

Domain ID domain_id	1l8aA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	970 — Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

Domain ID domain_id	1l8aA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	970 — Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

Domain ID domain_id	1l8aA03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	920 —

Domain ID domain_id	1l8aB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	970 — Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

Domain ID domain_id	1l8aB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	970 — Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

Domain ID domain_id	1l8aB03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	920 —

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Unit-cell length a length_a	81.690 Å
Unit-cell length b length_b	141.600 Å
Unit-cell length c length_c	82.460 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	102.40 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	1.850 Å
Low-resolution limit resolution_low	8.000 Å
R factor r_factor	0.1920
R_work r_work	0.1890
R_free r_free	0.2360

E. COLI PYRUVATE DEHYDROGENASE

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

Pyruvate dehydrogenase E1 component

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

1l8a__assembly_1__model_1

1l8a__assembly_1__model_1 | I(q)

1l8a__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)

E. COLI PYRUVATE DEHYDROGENASE

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

Pyruvate dehydrogenase E1 component

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

1l8a__assembly_1__model_1

1l8a__assembly_1__model_1 | I(q)

1l8a__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)