SAXSdb — 2zcw

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

Transcriptional regulator, FNR/CRP family

Thermus thermophilus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	(4S)-2-METHYL-2,4-PENTANEDIOL × 6 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q5SIL0_THET8
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–202； UniProt 1–202

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	2zcw
Deposition date deposition_date	2007-11-13
Structure title title	Crystal Structure of TTHA1359, a Transcriptional Regulator, CRP/FNR family from Thermus thermophilus HB8
Keywords keywords	;FNR/CRP family, transcriptional regulator, Thermus thermophilus, stationary phase, DNA-binding, Transcription regulation, Winged helix DNA-binding domain, cAMP-binding domain, Structural Genomics, NPPSFA, National Project on Protein Structural and Functional Analyses, RIKEN Structural Genomics/Proteomics Initiative, RSGI, 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.

2zcw__assembly_1__model_1

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

Download this curve (.dat)

2zcw__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2zcw__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	23.01 Å
Rg (electron density)	22.06 Å
Total Rg	22.96 Å
Atom count	3060
Residues	386
Excluded volume	54816 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2zcw__assembly_1__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	Transcriptional regulator, FNR/CRP family
Molecular weight formula_weight	22395.3 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1671

MTQVRETVSFKAGDVILYPGVPGPRDRAYRVLEGLVRLEAVDEEGNALTLRLVRPGGFFGEEALFGQERIYFAEAATDVRLEPLPENPDPELLKDLAQHLSQGLAEAYRRIERLATQRLKNRMAAALLELSETPLAHEEEGKVVLKATHDELAAAVGSVRETVTKVIGELAREGYIRSGYGKIQLLDLKGLKELAESRGQGR

Source Source

Source organism organism	Thermus thermophilus
NCBI taxonomy ID ncbi_taxonomy_id	274
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	(4S)-2-METHYL-2,4-PENTANEDIOL
Molecular weight formula_weight	118.2 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	141

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2zcwa1
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
Family Family family	a.4.5.4 — CAP C-terminal domain-like

Domain ID domain_id	d2zcwa2
Class class	b — All beta proteins
Fold Fold fold	b.82 — Double-stranded beta-helix
Superfamily Superfamily superfamily	b.82.3 — cAMP-binding domain-like
Family Family family	b.82.3.2 — cAMP-binding domain

CATH v4.4 (2 domains)

Domain ID domain_id	2zcwA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	10 — Jelly Rolls

Domain ID domain_id	2zcwA02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

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Unit-cell length a length_a	54.050 Å
Unit-cell length b length_b	54.050 Å
Unit-cell length c length_c	147.718 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 41 21 2
Space-group number int_tables_number	92
Crystal system crystal_system	—

Resolution resolution	1.500 Å
Low-resolution limit resolution_low	36.400 Å
R factor r_factor	0.2210
R_work r_work	0.2210
R_free r_free	0.2320

Crystal Structure of TTHA1359, a Transcriptional Regulator, CRP/FNR family from Thermus thermophilus HB8

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

Transcriptional regulator, FNR/CRP family

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

2zcw__assembly_1__model_1

2zcw__assembly_1__model_1 | I(q)

2zcw__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 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Crystal Structure of TTHA1359, a Transcriptional Regulator, CRP/FNR family from Thermus thermophilus HB8

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

Transcriptional regulator, FNR/CRP family

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

2zcw__assembly_1__model_1

2zcw__assembly_1__model_1 | I(q)

2zcw__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 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)