SAXSdb — 3gld

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

Pilin

Streptococcus pyogenes serotype M1

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	PILIN_STRP1
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 5–295； UniProt 18–308 Author chain B； PDBConstruct 5–295； UniProt 18–308 Author chain C； PDBConstruct 5–295； UniProt 18–308

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	3gld
Deposition date deposition_date	2009-03-12
Structure title title	Crystal Structure of the Major Pilin from Streptococcus pyogenes E117A mutant
Keywords keywords	;All-beta, pili, cell adhesion, structural protein, isopeptide, Cell wall, Fimbrium, Isopeptide bond, Membrane, Peptidoglycan-anchor, Secreted ;; STRUCTURAL 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.

3gld__assembly_1__model_1

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

Download this curve (.dat)

3gld__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3gld__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.40 Å
Rg (electron density)	28.60 Å
Total Rg	28.81 Å
Atom count	2272
Residues	294
Excluded volume	40390 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3gld__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3gld__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`3gld__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) 6 domains

CATH v4.4 (6 domains)

Domain ID domain_id	3gldA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	3050 —

Domain ID domain_id	3gldA02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1140 — Collagen-binding surface protein Cna, B-type domain

Domain ID domain_id	3gldB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	3050 —

Domain ID domain_id	3gldB02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1140 — Collagen-binding surface protein Cna, B-type domain

Domain ID domain_id	3gldC01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	3050 —

Domain ID domain_id	3gldC02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1140 — Collagen-binding surface protein Cna, B-type domain

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Unit-cell length a length_a	67.307 Å
Unit-cell length b length_b	52.149 Å
Unit-cell length c length_c	127.316 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	98.83 °
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	2.030 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.2149
R_work r_work	0.2123
R_free r_free	0.2647

Description description	Pilin
Molecular weight formula_weight	32422.0 kDa
Mutation mutation	E117A, D306V
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	7243

Crystal Structure of the Major Pilin from Streptococcus pyogenes E117A mutant

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

Pilin

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

3gld__assembly_1__model_1

3gld__assembly_1__model_1 | I(q)

3gld__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 6 domains

CATH v4.4 (6 domains)

7. Citations (1)

Source organism organism	Streptococcus pyogenes serotype M1
NCBI taxonomy ID ncbi_taxonomy_id	301447
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	550

Crystal Structure of the Major Pilin from Streptococcus pyogenes E117A mutant

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

Pilin

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

3gld__assembly_1__model_1

3gld__assembly_1__model_1 | I(q)

3gld__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 6 domains

CATH v4.4 (6 domains)

7. Citations (1)