1e9i

Enolase from E.coli

Method: X-RAY DIFFRACTION

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

ENOLASE

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 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	MAGNESIUM ION × 3 SULFATE ION × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ENO_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–431； UniProt 1–431 Author chain B； PDBConstruct 1–431； UniProt 1–431 Author chain C； PDBConstruct 1–431； UniProt 1–431 Author chain D； PDBConstruct 1–431； UniProt 1–431

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	1e9i
Deposition date deposition_date	2000-10-17
Structure title title	Enolase from E.coli
Keywords keywords	DEGRADOSOME, LYASE; LYASE
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.

1e9i__assembly_1__model_1

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

Download this curve (.dat)

1e9i__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1e9i__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	27.21 Å
Rg (electron density)	26.41 Å
Total Rg	27.14 Å
Atom count	6218
Residues	860
Excluded volume	110390 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1e9i__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1e9i__assembly_2__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	ENOLASE
Molecular weight formula_weight	45578.6 kDa
EC 编号 ec_number	4.2.1.11
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	12856

SKIVKIIGREIIDSRGNPTVEAEVHLEGGFVGMAAAPSGASTGSREALELRDGDKSRFLGKGVTKAVAAVNGPIAQALIGKDAKDQAGIDKIMIDLDGTENKSKFGANAILAVSLANAKAAAAAKGMPLYEHIAELNGTPGKYSMPVPMMNIINGGEHADNNVDIQEFMIQPVGAKTVKEAIRMGSEVFHHLAKVLKAKGMNTAVGDEGGYAPNLGSNAEALAVIAEAVKAAGYELGKDITLAMDCAASEFYKDGKYVLAGEGNKAFTSEEFTHFLEELTKQYPIVSIEDGLDESDWDGFAYQTKVLGDKIQLVGDDLFVTNTKILKEGIEKGIANSILIKFNQIGSLTETLAAIKMAKDAGYTAVISHRSGETEDATIADLAVGTAAGQIKTGSMSRSDRVAKYNQLIRIEEALGEKAPYNGRKEIKGQA

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	5

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	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	506

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6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1e9ia1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.11 — Enolase C-terminal domain-like
Family Family family	c.1.11.1 — Enolase

Domain ID domain_id	d1e9ia2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.54 — Enolase N-terminal domain-like
Superfamily Superfamily superfamily	d.54.1 — Enolase N-terminal domain-like
Family Family family	d.54.1.1 — Enolase N-terminal domain-like

Domain ID domain_id	d1e9ib1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.11 — Enolase C-terminal domain-like
Family Family family	c.1.11.1 — Enolase

Domain ID domain_id	d1e9ib2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.54 — Enolase N-terminal domain-like
Superfamily Superfamily superfamily	d.54.1 — Enolase N-terminal domain-like
Family Family family	d.54.1.1 — Enolase N-terminal domain-like

Domain ID domain_id	d1e9ic1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.11 — Enolase C-terminal domain-like
Family Family family	c.1.11.1 — Enolase

Domain ID domain_id	d1e9ic2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.54 — Enolase N-terminal domain-like
Superfamily Superfamily superfamily	d.54.1 — Enolase N-terminal domain-like
Family Family family	d.54.1.1 — Enolase N-terminal domain-like

Domain ID domain_id	d1e9id1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.11 — Enolase C-terminal domain-like
Family Family family	c.1.11.1 — Enolase

Domain ID domain_id	d1e9id2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.54 — Enolase N-terminal domain-like
Superfamily Superfamily superfamily	d.54.1 — Enolase N-terminal domain-like
Family Family family	d.54.1.1 — Enolase N-terminal domain-like

CATH v4.4 (8 domains)

Domain ID domain_id	1e9iA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	390 — Enolase-like; domain 1
Homologous superfamily homologous superfamily	10 — Enolase-like, N-terminal domain

Domain ID domain_id	1e9iA02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	120 — Enolase-like C-terminal domain

Domain ID domain_id	1e9iB01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	390 — Enolase-like; domain 1
Homologous superfamily homologous superfamily	10 — Enolase-like, N-terminal domain

Domain ID domain_id	1e9iB02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	120 — Enolase-like C-terminal domain

Domain ID domain_id	1e9iC01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	390 — Enolase-like; domain 1
Homologous superfamily homologous superfamily	10 — Enolase-like, N-terminal domain

Domain ID domain_id	1e9iC02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	120 — Enolase-like C-terminal domain

Domain ID domain_id	1e9iD01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	390 — Enolase-like; domain 1
Homologous superfamily homologous superfamily	10 — Enolase-like, N-terminal domain

Domain ID domain_id	1e9iD02
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	120 — Enolase-like C-terminal domain

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Unit-cell length a length_a	107.883 Å
Unit-cell length b length_b	150.006 Å
Unit-cell length c length_c	127.411 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	109.18 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	16

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

Resolution resolution	2.480 Å
Low-resolution limit resolution_low	27.970 Å
R factor r_factor	0.2290
R_work r_work	0.2290
R_free r_free	0.2760

Enolase from E.coli

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

ENOLASE

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

1e9i__assembly_1__model_1

1e9i__assembly_1__model_1 | I(q)

1e9i__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) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Enolase from E.coli

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

ENOLASE

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

1e9i__assembly_1__model_1

1e9i__assembly_1__model_1 | I(q)

1e9i__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) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)