SAXSdb — 4wqq

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

Lectin CEL-I, N-acetyl-D-galactosamine-specific C-type

Cucumaria echinata

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	CALCIUM ION × 6 alpha-D-mannopyranose × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	CALCIUM ION × 6 alpha-D-mannopyranose × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q7M462_CUCEC
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–141； UniProt 1–140 Author chain B； PDBConstruct 2–141； UniProt 1–140 Author chain C； PDBConstruct 2–141； UniProt 1–140 Author chain D； PDBConstruct 2–141； UniProt 1–140

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	4wqq
Deposition date deposition_date	2014-10-22
Structure title title	Structure of EPNH mutant of CEL-I
Keywords keywords	CEL-I, EPNH munant, C-type lectin, mannose recognition, SUGAR BINDING PROTEIN; SUGAR BINDING PROTEIN
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.

4wqq__assembly_1__model_1

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

Download this curve (.dat)

4wqq__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4wqq__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	24.59 Å
Rg (electron density)	24.19 Å
Total Rg	24.74 Å
Atom count	2306
Residues	282
Excluded volume	39827 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4wqq__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`4wqq__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	Lectin CEL-I, N-acetyl-D-galactosamine-specific C-type
Molecular weight formula_weight	16129.4 kDa
Mutation mutation	Q101E, D103N, W105H
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	5385

MNQCPTDWEAEGDHCYRFFNTLTTWENAHHECVSYSCSTLNVRSDLVSVHSAAEQAYVFNYWRGIDSQAGQLWIGLYDKYNEGDFIWTDGSKVGYTKWAGGEPNNHNNAEDYGQFRHTEGGAWNDNSAAAQAKYMCKLTFE

Source Source

Source organism organism	Cucumaria echinata
Common name common_name	Sea cucumber
NCBI taxonomy ID ncbi_taxonomy_id	40245
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	12

Entity 3 Entity 3 non-polymer

Description description	alpha-D-mannopyranose
Molecular weight formula_weight	180.2 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	758

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d4wqqa1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d4wqqa2
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	d4wqqb1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d4wqqb2
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	d4wqqc1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d4wqqc2
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	d4wqqd1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.169 — C-type lectin-like
Superfamily Superfamily superfamily	d.169.1 — C-type lectin-like
Family Family family	d.169.1.1 — C-type lectin domain

Domain ID domain_id	d4wqqd2
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 (4 domains)

Domain ID domain_id	4wqqA00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

Domain ID domain_id	4wqqB00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

Domain ID domain_id	4wqqC00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

Domain ID domain_id	4wqqD00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	100 — Mannose-Binding Protein A; Chain A
Homologous superfamily homologous superfamily	10 — Mannose-Binding Protein A, subunit A

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Unit-cell length a length_a	64.290 Å
Unit-cell length b length_b	61.060 Å
Unit-cell length c length_c	80.700 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	109.39 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

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

Resolution resolution	1.700 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.1536
R_work r_work	0.1516
R_free r_free	0.1902

Structure of EPNH mutant of CEL-I

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

Lectin CEL-I, N-acetyl-D-galactosamine-specific C-type

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

4wqq__assembly_1__model_1

4wqq__assembly_1__model_1 | I(q)

4wqq__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 (8 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Structure of EPNH mutant of CEL-I

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

Lectin CEL-I, N-acetyl-D-galactosamine-specific C-type

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

4wqq__assembly_1__model_1

4wqq__assembly_1__model_1 | I(q)

4wqq__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 (8 domains)

CATH v4.4 (4 domains)

7. Citations (1)