SAXSdb — 6v1d

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

Trefoil factor 1

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TFF1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–48； UniProt 27–74 Author chain B； PDBConstruct 1–48； UniProt 27–74 Author chain C； PDBConstruct 1–48； UniProt 27–74

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	6v1d
Deposition date deposition_date	2019-11-20
Structure title title	Crystal structure of human trefoil factor 1
Keywords keywords	Trefoil factor, lectin, mucin binding protein, 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.

6v1d__assembly_3__model_1

Assembly 3 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

6v1d__assembly_3__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6v1d__assembly_3__model_1 | P(r) · Pending

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

Rg（Guinier）	11.40 Å
Rg (electron density)	10.36 Å
Total Rg	11.69 Å
Atom count	366
Residues	47
Excluded volume	6382 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6v1d__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`6v1d__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`6v1d__assembly_3__model_1`	monomeric （1）	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 (2)

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6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d6v1da1
Class class	g — Small proteins
Fold Fold fold	g.16 — Trefoil/Plexin domain-like
Superfamily Superfamily superfamily	g.16.1 — Trefoil
Family Family family	g.16.1.1 — Trefoil

Domain ID domain_id	d6v1da2
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	d6v1db1
Class class	g — Small proteins
Fold Fold fold	g.16 — Trefoil/Plexin domain-like
Superfamily Superfamily superfamily	g.16.1 — Trefoil
Family Family family	g.16.1.1 — Trefoil

Domain ID domain_id	d6v1db2
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	d6v1dc_
Class class	g — Small proteins
Fold Fold fold	g.16 — Trefoil/Plexin domain-like
Superfamily Superfamily superfamily	g.16.1 — Trefoil
Family Family family	g.16.1.1 — Trefoil

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Unit-cell length a length_a	44.928 Å
Unit-cell length b length_b	41.905 Å
Unit-cell length c length_c	45.831 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	115.57 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	6

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

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	41.344 Å
R factor r_factor	0.1957
R_work r_work	0.1939
R_free r_free	0.2259

Description description	Trefoil factor 1
Molecular weight formula_weight	5657.4 kDa
Source method src_method	man
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	1210

Crystal structure of human trefoil factor 1

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

Trefoil factor 1

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

6v1d__assembly_3__model_1

6v1d__assembly_3__model_1 | I(q)

6v1d__assembly_3__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (5 domains)

7. Citations (1)

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

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	96

Crystal structure of human trefoil factor 1

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

Trefoil factor 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

6v1d__assembly_3__model_1

6v1d__assembly_3__model_1 | I(q)

6v1d__assembly_3__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (5 domains)

7. Citations (1)