SAXSdb — 1onk

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

Beta-galactoside specific lectin I A chain

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Galactose specific lectin I B chain × 2 （P81830） PHOSPHATE ION × 2 AZIDE ION × 18 GLYCEROL × 16 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 water × 4	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	Galactose specific lectin I B chain × 1 （P81830） PHOSPHATE ION × 1 AZIDE ION × 9 GLYCEROL × 8 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ML1_VISAL
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–254； UniProt 1–254

Galactose specific lectin I B chain

OrganismNot specified

UniProt P81830

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	Beta-galactoside specific lectin I A chain × 2 （P81446） PHOSPHATE ION × 2 AZIDE ION × 18 GLYCEROL × 16 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 water × 4	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	Beta-galactoside specific lectin I A chain × 1 （P81446） PHOSPHATE ION × 1 AZIDE ION × 9 GLYCEROL × 8 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MLB1_VISAL
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–263； UniProt 1–264

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	1onk
Deposition date deposition_date	2003-02-28
Structure title title	Mistletoe lectin I from viscum album
Keywords keywords	RIBOSOME-INACTIVATING PROTEIN TYPE II, hydrolase-sugar binding protein COMPLEX; hydrolase/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.

1onk__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1onk__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1onk__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	26.26 Å
Rg (electron density)	25.22 Å
Total Rg	25.93 Å
Atom count	4112
Residues	512
Excluded volume	72163 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1onk__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1onk__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 (7)

Entity 1 Entity 1 polymer

Description description	Beta-galactoside specific lectin I A chain
Molecular weight formula_weight	28503.0 kDa
EC 编号 ec_number	3.2.2.22
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	4453

YERLRLRVTHQTTGEEYFRFITLLRDYVSSGSFSNEIPLLRQSTIPVSDAQRFVLVELTNQGQDSVTAAIDVTNAYVVAYQAGDQSYFLRDAPRGAETHLFTGTTRSSLPFNGSYPDLERYAGHRDQIPLGIDQLIQSVTALRFPGGSTRTQARSILILIQMISEAARFNPILWRYRQYINSGASFLPDVYMLELETSWGQQSTQVQHSTDGVFNNPIRLAIPPGNFVTLTNVRDVIASLAIMLFVCGERPSSS

Entity 2 Entity 2 polymer

Description description	Galactose specific lectin I B chain
Molecular weight formula_weight	28949.4 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

DDVTCSASEPTVRIVGRNGMRVDVRDDDFHDGNQIQLWPSKSNNDPNQLWTIKRDGTIRSNGSCLTTYGYTAGVYVMIFDCNTAVREATIWQIWDNGTIINPRSNLVLAASSGIKGTTLTVQTLDYTLGQGWLAGNDTAPREVTIYGFRDLCMESNGGSVWVETCDSSQKNQKWALYGDGSIRPKQNQDQCLTSGRDSVSTVINIVSCSGASGSQRWVFTNEGAILNLKNGLAMDVAQANPKLRRIIIYPATGKPNQMWLPVF

Entity 3 Entity 3 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	AZIDE ION
Molecular weight formula_weight	42.0 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 5 Entity 5 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	8

Entity 6 Entity 6 non-polymer

Description description	2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	221.2 kDa
Source method src_method	man
Copy count entity_count	2

Entity 7 Entity 7 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	341

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6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1onka_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.165 — Ribosome inactivating proteins (RIP)
Superfamily Superfamily superfamily	d.165.1 — Ribosome inactivating proteins (RIP)
Family Family family	d.165.1.1 — Plant cytotoxins

Domain ID domain_id	d1onkb1
Class class	b — All beta proteins
Fold Fold fold	b.42 — beta-Trefoil
Superfamily Superfamily superfamily	b.42.2 — Ricin B-like lectins
Family Family family	b.42.2.1 — Ricin B-like

Domain ID domain_id	d1onkb2
Class class	b — All beta proteins
Fold Fold fold	b.42 — beta-Trefoil
Superfamily Superfamily superfamily	b.42.2 — Ricin B-like lectins
Family Family family	b.42.2.1 — Ricin B-like

CATH v4.4 (4 domains)

Domain ID domain_id	1onkA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	420 — Ricin (A subunit); domain 1
Homologous superfamily homologous superfamily	10 — Ricin (A subunit), domain 1

Domain ID domain_id	1onkA02
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	470 — Ricin (A Subunit), domain 2
Homologous superfamily homologous superfamily	10 — Ricin (A Subunit), domain 2

Domain ID domain_id	1onkB01
Class class	2 — Mainly Beta
Architecture architecture	80 — Trefoil
Topology topology	10 — Trefoil (Acidic Fibroblast Growth Factor, subunit A)
Homologous superfamily homologous superfamily	50 —

Domain ID domain_id	1onkB02
Class class	2 — Mainly Beta
Architecture architecture	80 — Trefoil
Topology topology	10 — Trefoil (Acidic Fibroblast Growth Factor, subunit A)
Homologous superfamily homologous superfamily	50 —

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Unit-cell length a length_a	107.285 Å
Unit-cell length b length_b	107.285 Å
Unit-cell length c length_c	311.773 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 65 2 2
Space-group number int_tables_number	179
Crystal system crystal_system	—

Resolution resolution	2.100 Å
Low-resolution limit resolution_low	8.000 Å
R factor r_factor	0.1629
R_work r_work	0.1598
R_free r_free	0.2233

Mistletoe lectin I from viscum album

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

Beta-galactoside specific lectin I A chain

State in the Current Structure

Other States of the Same Protein in the Database

Galactose specific lectin I B chain

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

1onk__assembly_2__model_1

1onk__assembly_2__model_1 | I(q)

1onk__assembly_2__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 (7)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Mistletoe lectin I from viscum album

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

Beta-galactoside specific lectin I A chain

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Galactose specific lectin I B chain

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

1onk__assembly_2__model_1

1onk__assembly_2__model_1 | I(q)

1onk__assembly_2__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 (7)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

CATH v4.4 (4 domains)

7. Citations (1)