SAXSdb — 1spp

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

MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-I

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-II × 1 （P35496） water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSP1_PIG
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–109； UniProt 1–109

MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-II

OrganismNot specified

UniProt P35496

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-I × 1 （P35495） water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PSP2_PIG
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–116； UniProt 22–137

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	1spp
Deposition date deposition_date	1997-06-19
Structure title title	THE CRYSTAL STRUCTURES OF TWO MEMBERS OF THE SPERMADHESIN FAMILY REVEAL THE FOLDING OF THE CUB DOMAIN
Keywords keywords	;SEMINAL PLASMA PROTEINS, SPERMADHESINS, CUB DOMAIN ARCHITECTURE, COMPLEX (SEMINAL PLASMA PROTEIN-SPP), COMPLEX (SEMINAL PLASMA PROTEIN-SPP) complex ;; COMPLEX (SEMINAL PLASMA PROTEIN/SPP)
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.

1spp__assembly_1__model_1

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

Download this curve (.dat)

1spp__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1spp__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	19.39 Å
Rg (electron density)	18.33 Å
Total Rg	19.29 Å
Atom count	2067
Residues	221
Excluded volume	30207 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1spp__assembly_1__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 (3)

Entity 1 Entity 1 polymer

Description description	MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-I
Molecular weight formula_weight	11997.7 kDa
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	2304

LDYHACGGRLTDDYGTIFTYKGPKTECVWTLQVDPKYKLLVSIPTLNLTCGKEYVEVLEGAPGSKSLGKFCEGLSILNRGSSGMTVKYKRDSGHPASPYEIIFLRDSQG

Entity 2 Entity 2 polymer

Description description	MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-II
Molecular weight formula_weight	12658.4 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

ARINGPDECGRVIKDTSGSISNTDRQKNLCTWTILMKPDQKVRMAIPYLNLACGKEYVEVFDGLLSGPSYGKLCAGAAIVFLSTANTMTIKYNRISGNSSSPFLIYFYGSSPGSEY

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	79

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1sppa_
Class class	b — All beta proteins
Fold Fold fold	b.23 — CUB-like
Superfamily Superfamily superfamily	b.23.1 — Spermadhesin, CUB domain
Family Family family	b.23.1.1 — Spermadhesin, CUB domain

Domain ID domain_id	d1sppb_
Class class	b — All beta proteins
Fold Fold fold	b.23 — CUB-like
Superfamily Superfamily superfamily	b.23.1 — Spermadhesin, CUB domain
Family Family family	b.23.1.1 — Spermadhesin, CUB domain

CATH v4.4 (2 domains)

Domain ID domain_id	1sppA00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	290 — Spermadhesin, CUB domain

Domain ID domain_id	1sppB00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	290 — Spermadhesin, CUB domain

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Unit-cell length a length_a	96.370 Å
Unit-cell length b length_b	96.370 Å
Unit-cell length c length_c	71.320 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	6

Space group space_group	P 32 2 1
Space-group number int_tables_number	154
Crystal system crystal_system	—

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	8.000 Å
R factor r_factor	0.2000
R_work r_work	0.2000
R_free r_free	0.2590

THE CRYSTAL STRUCTURES OF TWO MEMBERS OF THE SPERMADHESIN FAMILY REVEAL THE FOLDING OF THE CUB DOMAIN

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

MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-I

State in the Current Structure

Other States of the Same Protein in the Database

MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-II

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

1spp__assembly_1__model_1

1spp__assembly_1__model_1 | I(q)

1spp__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (4)

THE CRYSTAL STRUCTURES OF TWO MEMBERS OF THE SPERMADHESIN FAMILY REVEAL THE FOLDING OF THE CUB DOMAIN

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

MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-I

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-II

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

1spp__assembly_1__model_1

1spp__assembly_1__model_1 | I(q)

1spp__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (4)