SAXSdb — 1q5x

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

REGULATOR OF RNASE E ACTIVITY A

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RRAA_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–161； UniProt 1–161 Author chain B； PDBConstruct 1–161； UniProt 1–161 Author chain C； PDBConstruct 1–161； UniProt 1–161

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	1q5x
Deposition date deposition_date	2003-08-11
Structure title title	Structure of OF RRAA (MENG), a protein inhibitor of RNA processing
Keywords keywords	3-LAYER SANDWICH, ALPHA-BETA STRUCTURE, PARALLEL BETA SHEET, ANTIPARALLEL BETA SHEET, hydrolase inhibitor; hydrolase inhibitor
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.

1q5x__assembly_1__model_1

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

Download this curve (.dat)

1q5x__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1q5x__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	24.98 Å
Rg (electron density)	23.80 Å
Total Rg	24.59 Å
Atom count	3573
Residues	473
Excluded volume	62930 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1q5x__assembly_1__model_1`	trimeric （3）	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

SCOP 2.08 (3 domains)

Domain ID domain_id	d1q5xa_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.7 — RraA-like
Family Family family	c.8.7.1 — RraA-like

Domain ID domain_id	d1q5xb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.7 — RraA-like
Family Family family	c.8.7.1 — RraA-like

Domain ID domain_id	d1q5xc_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.7 — RraA-like
Family Family family	c.8.7.1 — RraA-like

CATH v4.4 (3 domains)

Domain ID domain_id	1q5xA00
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	30 — Glucose Oxidase; domain 1
Homologous superfamily homologous superfamily	40 — Ribonuclease E inhibitor RraA/RraA-like

Domain ID domain_id	1q5xB00
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	30 — Glucose Oxidase; domain 1
Homologous superfamily homologous superfamily	40 — Ribonuclease E inhibitor RraA/RraA-like

Domain ID domain_id	1q5xC00
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	30 — Glucose Oxidase; domain 1
Homologous superfamily homologous superfamily	40 — Ribonuclease E inhibitor RraA/RraA-like

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Unit-cell length a length_a	94.454 Å
Unit-cell length b length_b	93.945 Å
Unit-cell length c length_c	67.949 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	132.72 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2280
R_work r_work	0.2260
R_free r_free	0.2740

Description description	REGULATOR OF RNASE E ACTIVITY A
Molecular weight formula_weight	17371.3 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	3817

Structure of OF RRAA (MENG), a protein inhibitor of RNA processing

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

REGULATOR OF RNASE E ACTIVITY A

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

1q5x__assembly_1__model_1

1q5x__assembly_1__model_1 | I(q)

1q5x__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

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (2)

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
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	244

Structure of OF RRAA (MENG), a protein inhibitor of RNA processing

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

REGULATOR OF RNASE E ACTIVITY A

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

1q5x__assembly_1__model_1

1q5x__assembly_1__model_1 | I(q)

1q5x__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

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (2)