SAXSdb — 2nlb

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

Beta-defensin 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	SULFATE ION × 3 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
4	Protein monomer	Monomer	Protein 1	SULFATE ION × 2 water × 1	Consistent with protein count
5	Protein homooligomer	Homooligomer	Protein 4	SULFATE ION × 5 water × 4	Consistent with protein count
6	Protein homooligomer	Homooligomer	Protein 2	SULFATE ION × 3 water × 2	Consistent with protein count
7	Protein homooligomer	Homooligomer	Protein 2	SULFATE ION × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BD01_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–36； UniProt 33–68 Author chain B； PDBConstruct 1–36； UniProt 33–68 Author chain C； PDBConstruct 1–36； UniProt 33–68 Author chain D； PDBConstruct 1–36； UniProt 33–68

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	2nlb
Deposition date deposition_date	2006-10-20
Structure title title	Human beta-defensin-1 (Mutant Asn4Ala)
Keywords keywords	antimicrobial, chemotactic, defensin, ANTIMICROBIAL PROTEIN; ANTIMICROBIAL 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.

2nlb__assembly_5__model_1

Assembly 5 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2nlb__assembly_5__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2nlb__assembly_5__model_1 | P(r) · Pending

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

Rg（Guinier）	17.09 Å
Rg (electron density)	17.14 Å
Total Rg	18.01 Å
Atom count	1097
Residues	144
Excluded volume	19391 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2nlb__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2nlb__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`2nlb__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`2nlb__assembly_4__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`2nlb__assembly_5__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
6	1	`2nlb__assembly_6__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
7	1	`2nlb__assembly_7__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	Beta-defensin 1
Molecular weight formula_weight	3897.6 kDa
Mutation mutation	N4A
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	1332

DHYACVSSGGQCLYSACPIFTKIQGTCYRGKAKCCK

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 2 Entity 2 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	216

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d2nlba_
Class class	g — Small proteins
Fold Fold fold	g.9 — Defensin-like
Superfamily Superfamily superfamily	g.9.1 — Defensin-like
Family Family family	g.9.1.1 — Defensin

Domain ID domain_id	d2nlbb_
Class class	g — Small proteins
Fold Fold fold	g.9 — Defensin-like
Superfamily Superfamily superfamily	g.9.1 — Defensin-like
Family Family family	g.9.1.1 — Defensin

Domain ID domain_id	d2nlbc_
Class class	g — Small proteins
Fold Fold fold	g.9 — Defensin-like
Superfamily Superfamily superfamily	g.9.1 — Defensin-like
Family Family family	g.9.1.1 — Defensin

Domain ID domain_id	d2nlbd_
Class class	g — Small proteins
Fold Fold fold	g.9 — Defensin-like
Superfamily Superfamily superfamily	g.9.1 — Defensin-like
Family Family family	g.9.1.1 — Defensin

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Unit-cell length a length_a	46.520 Å
Unit-cell length b length_b	26.400 Å
Unit-cell length c length_c	57.530 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	100.80 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

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

Resolution resolution	1.850 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.1820
R_work r_work	0.1790
R_free r_free	0.2380

Human beta-defensin-1 (Mutant Asn4Ala)

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

Beta-defensin 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

2nlb__assembly_5__model_1

2nlb__assembly_5__model_1 | I(q)

2nlb__assembly_5__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (4 domains)

7. Citations (1)

Human beta-defensin-1 (Mutant Asn4Ala)

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

Beta-defensin 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

2nlb__assembly_5__model_1

2nlb__assembly_5__model_1 | I(q)

2nlb__assembly_5__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (4 domains)

7. Citations (1)