SAXSdb — 2qsr

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

Transcription-repair coupling factor

Streptococcus pneumoniae

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8DRQ1_STRR6
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–165； UniProt 1007–1168

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	2qsr
Deposition date deposition_date	2007-07-31
Structure title title	Crystal structure of C-terminal domain of transcription-repair coupling factor
Keywords keywords	;structural genomics, Transcription-repair, PSI-2, Protein Structure Initiative, New York SGX Research Center for Structural Genomics, NYSGXRC, ATP-binding, Helicase, Hydrolase, Nucleotide-binding, TRANSCRIPTION ;; TRANSCRIPTION
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.

2qsr__assembly_1__model_1

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

Download this curve (.dat)

2qsr__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2qsr__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	18.07 Å
Rg (electron density)	16.79 Å
Total Rg	17.87 Å
Atom count	1329
Residues	160
Excluded volume	24043 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2qsr__assembly_1__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 (1)

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6. Fold Classification (SCOP + CATH) 1 domains

CATH v4.4 (1 domains)

Domain ID domain_id	2qsrA01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1150 — Aspartate Aminotransferase, domain 1
Homologous superfamily homologous superfamily	50 — Transcription-repair-coupling factor, D7 domain

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Unit-cell length a length_a	84.891 Å
Unit-cell length b length_b	84.891 Å
Unit-cell length c length_c	122.021 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	12

Space group space_group	P 61 2 2
Space-group number int_tables_number	178
Crystal system crystal_system	—

Resolution resolution	3.100 Å
Low-resolution limit resolution_low	42.450 Å
R factor r_factor	0.1870
R_work r_work	0.1840
R_free r_free	0.2430

Description description	Transcription-repair coupling factor
Molecular weight formula_weight	20506.1 kDa
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1329

Crystal structure of C-terminal domain of transcription-repair coupling factor

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

Transcription-repair coupling factor

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

2qsr__assembly_1__model_1

2qsr__assembly_1__model_1 | I(q)

2qsr__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 1 domains

CATH v4.4 (1 domains)

7. Citations (1)

Source organism organism	Streptococcus pneumoniae
NCBI taxonomy ID ncbi_taxonomy_id	171101
Host organism host_organism	Escherichia coli BL21(DE3)

Crystal structure of C-terminal domain of transcription-repair coupling factor

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

Transcription-repair coupling factor

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

2qsr__assembly_1__model_1

2qsr__assembly_1__model_1 | I(q)

2qsr__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 1 domains

CATH v4.4 (1 domains)

7. Citations (1)