SAXSdb — 4e1y

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

Alginate lyase

Sphingomonas

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 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	Q9KWU1_SPHSX
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–353； UniProt 54–404 Author chain B； PDBConstruct 3–353； UniProt 54–404

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	4e1y
Deposition date deposition_date	2012-03-07
Structure title title	Alginate lyase A1-III H192A apo form
Keywords keywords	ALPHA BARREL, polysaccharide LYASE, ALGINATE, 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.

4e1y__assembly_1__model_1

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

Download this curve (.dat)

4e1y__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4e1y__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.84 Å
Rg (electron density)	19.71 Å
Total Rg	20.67 Å
Atom count	2800
Residues	353
Excluded volume	49396 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4e1y__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`4e1y__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 (2)

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d4e1ya1
Class class	a — All alpha proteins
Fold Fold fold	a.102 — alpha/alpha toroid
Superfamily Superfamily superfamily	a.102.3 — Chondroitin AC/alginate lyase
Family Family family	a.102.3.1 — Alginate lyase A1-III

Domain ID domain_id	d4e1ya2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d4e1yb1
Class class	a — All alpha proteins
Fold Fold fold	a.102 — alpha/alpha toroid
Superfamily Superfamily superfamily	a.102.3 — Chondroitin AC/alginate lyase
Family Family family	a.102.3.1 — Alginate lyase A1-III

Domain ID domain_id	d4e1yb2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (2 domains)

Domain ID domain_id	4e1yA00
Class class	1 — Mainly Alpha
Architecture architecture	50 — Alpha/alpha barrel
Topology topology	10 — Glycosyltransferase
Homologous superfamily homologous superfamily	100 — Chondroitin AC/alginate lyase

Domain ID domain_id	4e1yB00
Class class	1 — Mainly Alpha
Architecture architecture	50 — Alpha/alpha barrel
Topology topology	10 — Glycosyltransferase
Homologous superfamily homologous superfamily	100 — Chondroitin AC/alginate lyase

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Unit-cell length a length_a	65.443 Å
Unit-cell length b length_b	76.990 Å
Unit-cell length c length_c	143.517 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.100 Å
Low-resolution limit resolution_low	40.634 Å
R factor r_factor	0.1653
R_work r_work	0.1631
R_free r_free	0.2057

Description description	Alginate lyase
Molecular weight formula_weight	39753.7 kDa
EC 编号 ec_number	4.2.2.3
Mutation mutation	H192A
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	5967

Alginate lyase A1-III H192A apo form

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

Alginate lyase

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

4e1y__assembly_1__model_1

4e1y__assembly_1__model_1 | I(q)

4e1y__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Sphingomonas
NCBI taxonomy ID ncbi_taxonomy_id	28214
Host organism host_organism	BACILLUS SUBTILIS

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	287

Alginate lyase A1-III H192A apo form

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

Alginate lyase

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

4e1y__assembly_1__model_1

4e1y__assembly_1__model_1 | I(q)

4e1y__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (4 domains)

CATH v4.4 (2 domains)

7. Citations (1)