SAXSdb — 2xtl

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

CELL WALL SURFACE ANCHOR FAMILY PROTEIN

STREPTOCOCCUS AGALACTIAE

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q3DMP5_STRAG
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–452； UniProt 190–641 Author chain B； PDBConstruct 1–452； UniProt 190–641

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	2xtl
Deposition date deposition_date	2010-10-11
Structure title title	Structure of the major pilus backbone protein from Streptococcus Agalactiae
Keywords keywords	GRAM-POSITIVE PILI PROTEIN, BP-2A 515 ALLELE, IMMUNOGLOBULIN-LIKE DOMAINS, STRUCTURAL PROTEIN; 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.

2xtl__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2xtl__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2xtl__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	27.09 Å
Rg (electron density)	26.52 Å
Total Rg	27.34 Å
Atom count	3477
Residues	452
Excluded volume	61792 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2xtl__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2xtl__assembly_2__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 (3)

Entity 1 Entity 1 polymer

Description description	CELL WALL SURFACE ANCHOR FAMILY PROTEIN
Molecular weight formula_weight	49412.9 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	7974

NTETKPQVDKNFADKELDYANNKKDKGTVSASVGDVKKYHVGTKILKGSDYKKLIWTDSMTKGLTFNNDIAVTLDGATLDATNYKLVADDQGFRLVLTDKGLEAVAKAAKTKDVEIKITYSATLNGSAVVEVLETNDVKLDYGNNPTIENEPKEGIPVDKKITVNKTWAVDGNEVNKADETVDAVFTLQVKDGDKWVNVDSAKATAATSFKHTFENLDNAKTYRVIERVSGYAPEYVSFVNGVVTIKNNKDSNEPTPINPSEPKVVTYGRKFVKTNKDGKERLAGATFLVKKDGKYLARKSGVATDAEKAAVDSTKSALDAAVKAYNDLTKEKQEGQDGKSALATVSEKQKAYNDAFVKANYSYEWVEDKNAKNVVKLISNDKGQFEITGLTEGQYSLEETQAPTGYAKLSGDVSFNVNATSYSKGSAQDIEYTQGSKTKDAQQVINKKVTI

Source Source

Source organism organism	STREPTOCOCCUS AGALACTIAE
NCBI taxonomy ID ncbi_taxonomy_id	342614
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	POTASSIUM ION
Molecular weight formula_weight	39.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	895

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6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id	2xtlA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	740 —

Domain ID domain_id	2xtlA02
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	2xtlA03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	2xtlA04
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	58 — Methane Monooxygenase Hydroxylase; Chain G, domain 1
Homologous superfamily homologous superfamily	90 —

Domain ID domain_id	2xtlB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	740 —

Domain ID domain_id	2xtlB02
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	2xtlB03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	2xtlB04
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	58 — Methane Monooxygenase Hydroxylase; Chain G, domain 1
Homologous superfamily homologous superfamily	90 —

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Unit-cell length a length_a	63.863 Å
Unit-cell length b length_b	104.681 Å
Unit-cell length c length_c	159.250 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.750 Å
Low-resolution limit resolution_low	40.000 Å
R factor r_factor	0.1864
R_work r_work	0.1849
R_free r_free	0.2159

Structure of the major pilus backbone protein from Streptococcus Agalactiae

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

CELL WALL SURFACE ANCHOR FAMILY PROTEIN

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

2xtl__assembly_2__model_1

2xtl__assembly_2__model_1 | I(q)

2xtl__assembly_2__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) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)

Structure of the major pilus backbone protein from Streptococcus Agalactiae

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

CELL WALL SURFACE ANCHOR FAMILY PROTEIN

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

2xtl__assembly_2__model_1

2xtl__assembly_2__model_1 | I(q)

2xtl__assembly_2__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) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)