SAXSdb — 2x9a

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

ATTACHMENT PROTEIN G3P

ENTEROBACTERIA PHAGE IF1

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	MEMBRANE SPANNING PROTEIN, REQUIRED FOR OUTER MEMBRANE INTEGRITY × 1 （Q8X965） water × 2	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	MEMBRANE SPANNING PROTEIN, REQUIRED FOR OUTER MEMBRANE INTEGRITY × 1 （Q8X965） water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	G3P_BPIF1
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–65； UniProt 17–81 Author chain C； PDBConstruct 1–65； UniProt 17–81

MEMBRANE SPANNING PROTEIN, REQUIRED FOR OUTER MEMBRANE INTEGRITY

ESCHERICHIA COLI

UniProt Q8X965

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	ATTACHMENT PROTEIN G3P × 1 （O80297） water × 2	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	ATTACHMENT PROTEIN G3P × 1 （O80297） water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8X965_ECO57
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–127； UniProt 268–394 Author chain D； PDBConstruct 1–127； UniProt 268–394

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	2x9a
Deposition date deposition_date	2010-03-15
Structure title title	crystal structure of g3p from phage IF1 in complex with its coreceptor, the C-terminal domain of TolA
Keywords keywords	TRANSMEMBRANE, PHAGE INFECTION, PHAGE RECOGNITION, HOST-VIRUS INTERACTION, VIRION, VIRAL PROTEIN, HOST MEMBRANE; VIRAL 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.

2x9a__assembly_1__model_1

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

Download this curve (.dat)

2x9a__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2x9a__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	16.32 Å
Rg (electron density)	15.33 Å
Total Rg	16.52 Å
Atom count	1140
Residues	151
Excluded volume	20190 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2x9a__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2x9a__assembly_2__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	ATTACHMENT PROTEIN G3P
Molecular weight formula_weight	7037.5 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C
Atom count atom_count	2338

ATTDAECLSKPAFDGTLSNVWKEGDSRYANFENCIYELSGIGIGYDNDTSWNGHWTPVRAADGSG

Source Source

Source organism organism	ENTEROBACTERIA PHAGE IF1
NCBI taxonomy ID ncbi_taxonomy_id	10868
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 polymer

Description description	MEMBRANE SPANNING PROTEIN, REQUIRED FOR OUTER MEMBRANE INTEGRITY
Molecular weight formula_weight	13985.6 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,D

DDIFGELSSGKNAPKTGGGAKGNNASPAGSGNTKNNGASGADINNYAGQIKSAIESKFYDASSYAGKTCTLRIKLAPDGMLLDIKPEGGDPALCQAALAAAKLAKIPKPPSQAVYEVFKNAPLDFKPAAAHHHHHH

Source Source

Source organism organism	ESCHERICHIA COLI
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	ESCHERICHIA COLI

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	58

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d2x9aa_
Class class	b — All beta proteins
Fold Fold fold	b.37 — N-terminal domains of the minor coat protein g3p
Superfamily Superfamily superfamily	b.37.1 — N-terminal domains of the minor coat protein g3p
Family Family family	b.37.1.0 — automated matches

Domain ID domain_id	d2x9ab1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.212 — TolA/TonB C-terminal domain
Superfamily Superfamily superfamily	d.212.1 — TolA/TonB C-terminal domain
Family Family family	d.212.1.1 — TolA

Domain ID domain_id	d2x9ab2
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	d2x9ac_
Class class	b — All beta proteins
Fold Fold fold	b.37 — N-terminal domains of the minor coat protein g3p
Superfamily Superfamily superfamily	b.37.1 — N-terminal domains of the minor coat protein g3p
Family Family family	b.37.1.0 — automated matches

Domain ID domain_id	d2x9ad1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.212 — TolA/TonB C-terminal domain
Superfamily Superfamily superfamily	d.212.1 — TolA/TonB C-terminal domain
Family Family family	d.212.1.1 — TolA

Domain ID domain_id	d2x9ad2
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 (4 domains)

Domain ID domain_id	2x9aA00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	27 — Phage FD Coat Protein, Membrane penetration domain
Homologous superfamily homologous superfamily	10 — Phage FD Coat Protein,Membrane penetration domain

Domain ID domain_id	2x9aB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1150 — Fusion Protein Consisting Of Minor Coat Protein, Glycine Rich Linker, Tola, And A His Tag; Chain: A; Domain 2
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	2x9aC00
Class class	2 — Mainly Beta
Architecture architecture	30 — Roll
Topology topology	27 — Phage FD Coat Protein, Membrane penetration domain
Homologous superfamily homologous superfamily	10 — Phage FD Coat Protein,Membrane penetration domain

Domain ID domain_id	2x9aD00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1150 — Fusion Protein Consisting Of Minor Coat Protein, Glycine Rich Linker, Tola, And A His Tag; Chain: A; Domain 2
Homologous superfamily homologous superfamily	10 —

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Unit-cell length a length_a	94.515 Å
Unit-cell length b length_b	94.515 Å
Unit-cell length c length_c	132.111 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	18

Space group space_group	H 3
Space-group number int_tables_number	146
Crystal system crystal_system	—

Resolution resolution	2.470 Å
Low-resolution limit resolution_low	32.217 Å
R factor r_factor	0.1834
R_work r_work	0.1810
R_free r_free	0.2288

crystal structure of g3p from phage IF1 in complex with its coreceptor, the C-terminal domain of TolA

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

ATTACHMENT PROTEIN G3P

State in the Current Structure

Other States of the Same Protein in the Database

MEMBRANE SPANNING PROTEIN, REQUIRED FOR OUTER MEMBRANE INTEGRITY

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

2x9a__assembly_1__model_1

2x9a__assembly_1__model_1 | I(q)

2x9a__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (6 domains)

CATH v4.4 (4 domains)

7. Citations (1)

crystal structure of g3p from phage IF1 in complex with its coreceptor, the C-terminal domain of TolA

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

ATTACHMENT PROTEIN G3P

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

MEMBRANE SPANNING PROTEIN, REQUIRED FOR OUTER MEMBRANE INTEGRITY

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

2x9a__assembly_1__model_1

2x9a__assembly_1__model_1 | I(q)

2x9a__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (6 domains)

CATH v4.4 (4 domains)

7. Citations (1)