SAXSdb — 1kcs

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

PC282 IMMUNOGLOBULIN

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	PC282 IMMUNOGLOBULIN × 1 （P18532） PS1 peptide × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	KAC_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain L； PDBConstruct 109–214； UniProt 1–106

PC282 IMMUNOGLOBULIN

OrganismNot specified

UniProt P18532

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	PC282 IMMUNOGLOBULIN × 1 （P01837） PS1 peptide × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	HV61_MOUSE
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain H； PDBConstruct 7–98； UniProt 25–116

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	1kcs
Deposition date deposition_date	2001-11-11
Structure title title	CRYSTAL STRUCTURE OF ANTIBODY PC282 IN COMPLEX WITH PS1 PEPTIDE
Keywords keywords	ANTIBODY, PEPTIDE ANTIGEN COMPLEX (ANTIBODY-PEPTIDE), IMMUNE SYSTEM; IMMUNE SYSTEM
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.

1kcs__assembly_1__model_1

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

Download this curve (.dat)

1kcs__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1kcs__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.42 Å
Rg (electron density)	24.47 Å
Total Rg	25.30 Å
Atom count	3263
Residues	438
Excluded volume	57545 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1kcs__assembly_1__model_1`	trimeric （3）	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	PC282 IMMUNOGLOBULIN
Molecular weight formula_weight	22983.3 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L
Atom count atom_count	3348

DIVMTQSPKSMGMSVGEAVTLNCKASENVGTYVSWYQQKPGQSPVLLIYGASNRYTGVPDRFTGSGSATDFTLTISSVQADDDADYYCGQSYSSPLTFGGGTKLELKRADAAPTSSIFPPSSEQLSSGGASVVCFLNSFYPKSIAVKWKVDGSKRANGTANSWTDQDSASSTYSMSSTLTLTKDKYERHNSYTCEATHKTSSSPVVKSFNRNEC

Entity 2 Entity 2 polymer

Description description	PC282 IMMUNOGLOBULIN
Molecular weight formula_weight	22760.3 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	H

QVTLSQSGPGLVKPSQSLSLTCTVTSYSITSDYAWNWIRQFAGQSLEWMGYISYSGSTSYNPSLKSRISITRDTSKNQFFLQLNSVTTDDTATYYCARGGTGFPYWGTGTNVTVSAASTTAPSVFPLVPGSATAAASAVTLGCLVKGYFPEPVTVAWNEGALSSGVLTVSAVLQSGLYTLSSNTTVASGTWPSASVTCLVAHPKSSTAADKKIEPKD

Entity 3 Entity 3 polymer

Description description	PS1 peptide
Molecular weight formula_weight	1584.6 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	P

HQLDPAFGANSTNPD

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	85

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1kcsh1
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.1 — Immunoglobulin
Family Family family	b.1.1.1 — V set domains (antibody variable domain-like)

Domain ID domain_id	d1kcsh2
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.1 — Immunoglobulin
Family Family family	b.1.1.2 — C1 set domains (antibody constant domain-like)

Domain ID domain_id	d1kcsl1
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.1 — Immunoglobulin
Family Family family	b.1.1.1 — V set domains (antibody variable domain-like)

Domain ID domain_id	d1kcsl2
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.1 — Immunoglobulin
Family Family family	b.1.1.2 — C1 set domains (antibody constant domain-like)

CATH v4.4 (4 domains)

Domain ID domain_id	1kcsH01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	1kcsH02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	1kcsL01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	1kcsL02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

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Unit-cell length a length_a	52.601 Å
Unit-cell length b length_b	69.524 Å
Unit-cell length c length_c	59.359 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	95.62 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	—
R_work r_work	0.2090
R_free r_free	0.2770

CRYSTAL STRUCTURE OF ANTIBODY PC282 IN COMPLEX WITH PS1 PEPTIDE

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

PC282 IMMUNOGLOBULIN

State in the Current Structure

Other States of the Same Protein in the Database

PC282 IMMUNOGLOBULIN

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

1kcs__assembly_1__model_1

1kcs__assembly_1__model_1 | I(q)

1kcs__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

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (2)

CRYSTAL STRUCTURE OF ANTIBODY PC282 IN COMPLEX WITH PS1 PEPTIDE

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

PC282 IMMUNOGLOBULIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

PC282 IMMUNOGLOBULIN

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

1kcs__assembly_1__model_1

1kcs__assembly_1__model_1 | I(q)

1kcs__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

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (2)