SAXSdb — 2n1t

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

Vesicle-associated membrane protein 2

Rattus norvegicus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	Syntaxin-1A × 1 （P32851） Synaptosomal-associated protein 25 × 1 （P60880） Synaptosomal-associated protein 25 × 1 （P60880） Synaptotagmin-1 × 1 （P21579）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	VAMP2_RAT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–69； UniProt 25–93

Syntaxin-1A

Rattus norvegicus

UniProt P32851

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	Vesicle-associated membrane protein 2 × 1 （P63045） Synaptosomal-associated protein 25 × 1 （P60880） Synaptosomal-associated protein 25 × 1 （P60880） Synaptotagmin-1 × 1 （P21579）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	STX1A_RAT
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–72； UniProt 188–259

Synaptosomal-associated protein 25

Homo sapiens

UniProt P60880

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	Vesicle-associated membrane protein 2 × 1 （P63045） Syntaxin-1A × 1 （P32851） Synaptotagmin-1 × 1 （P21579）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SNP25_HUMAN
Isoform	—
PDB entities	3, 4
Chains and sequence ranges	Author chain C； PDBConstruct 1–77； UniProt 7–83 Author chain D； PDBConstruct 1–74； UniProt 131–204

Synaptotagmin-1

Homo sapiens

UniProt P21579

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	Vesicle-associated membrane protein 2 × 1 （P63045） Syntaxin-1A × 1 （P32851） Synaptosomal-associated protein 25 × 1 （P60880） Synaptosomal-associated protein 25 × 1 （P60880）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SYT1_HUMAN
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain E； PDBConstruct 9–156； UniProt 272–419

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	2n1t
Deposition date deposition_date	2015-04-21
Structure title title	Dynamic binding mode of a synaptotagmin-1-SNARE complex in solution
Keywords keywords	Synaptotagmin-1, C2B domain, Syntaxin-1A, Synaptobrevin-2, SNAP-25, SNAP-25A, SNARE complex, EXOCYTOSIS; EXOCYTOSIS
Experimental Method method	SOLUTION NMR

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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.

2n1t__assembly_1__model_1

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

Download this curve (.dat)

2n1t__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2n1t__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	30.47 Å
Rg (electron density)	30.35 Å
Total Rg	30.67 Å
Atom count	7196
Residues	448
Excluded volume	63501 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2n1t__assembly_1__model_1`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	2	`2n1t__assembly_1__model_2`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	3	`2n1t__assembly_1__model_3`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	4	`2n1t__assembly_1__model_4`	pentameric （5）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	5	`2n1t__assembly_1__model_5`	pentameric （5）	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 (5)

Entity 1 Entity 1 polymer

Description description	Vesicle-associated membrane protein 2
Molecular weight formula_weight	8045.0 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	35980

NLTSNRRLQQTQAQVDEVVDIMRVNVDKVLERDQKLSELDDRADALQAGASQFETSAAKLKRKYWWKNL

Source Source

Source organism organism	Rattus norvegicus
Common name common_name	brown rat,rat,rats
NCBI taxonomy ID ncbi_taxonomy_id	10116
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Syntaxin-1A
Molecular weight formula_weight	8429.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

SKQALSEIETRHSEIIKLENSIRELHDMFMDMAMLVESQGEMIDRIEYNVEHAVDYVERAVSDTKKAVKYQS

Source Source

Source organism organism	Rattus norvegicus
Common name common_name	brown rat,rat,rats
NCBI taxonomy ID ncbi_taxonomy_id	10116
Host organism host_organism	Escherichia coli

Entity 3 Entity 3 polymer

Description description	Synaptosomal-associated protein 25
Molecular weight formula_weight	9030.1 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MRNELEEMQRRADQLADESLESTRRMLQLVEESKDAGIRTLVMLDEQGEQLDRVEEGMNHINQDMKEAEKNLKDLGK

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 4 Entity 4 polymer

Description description	Synaptosomal-associated protein 25
Molecular weight formula_weight	8458.4 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

GGFIRRVTNDARENEMDENLEQVSGIIGNLRHMALDMGNEIDTQNRQIDRIMEKADSNKTRIDEANQRATKMLG

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 5 Entity 5 polymer

Description description	Synaptotagmin-1
Molecular weight formula_weight	17465.2 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

SGGGGGILEKLGDICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQNGKRLKKKKTTIKKNTLNPYYNESFSFEVPFEQIQKVQVVVTVLDYDKIGKNDAIGKVFVGYNSTGAELRHWSDMLANPRRPIAQWHTLQVEEEVDAMLA

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

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6. Fold Classification (SCOP + CATH) 11 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d2n1ta_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.15 — SNARE fusion complex
Family Family family	h.1.15.1 — SNARE fusion complex

Domain ID domain_id	d2n1tb_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.15 — SNARE fusion complex
Family Family family	h.1.15.1 — SNARE fusion complex

Domain ID domain_id	d2n1tc_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.15 — SNARE fusion complex
Family Family family	h.1.15.1 — SNARE fusion complex

Domain ID domain_id	d2n1td_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.15 — SNARE fusion complex
Family Family family	h.1.15.1 — SNARE fusion complex

Domain ID domain_id	d2n1te1
Class class	b — All beta proteins
Fold Fold fold	b.7 — C2 domain-like
Superfamily Superfamily superfamily	b.7.1 — C2 domain (Calcium/lipid-binding domain, CaLB)
Family Family family	b.7.1.2 — Synaptotagmin-like (S variant)

Domain ID domain_id	d2n1te2
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 (5 domains)

Domain ID domain_id	2n1tA00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	2n1tB00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	2n1tC00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	2n1tD00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	2n1tE00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	150 — C2 domain

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Dynamic binding mode of a synaptotagmin-1-SNARE complex in solution

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

Vesicle-associated membrane protein 2

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Syntaxin-1A

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Synaptosomal-associated protein 25

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Synaptotagmin-1

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

2n1t__assembly_1__model_1

2n1t__assembly_1__model_1 | I(q)

2n1t__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 11 domains

SCOP 2.08 (6 domains)

CATH v4.4 (5 domains)

7. Citations (1)