2f4i

Crystal structure of an ob-fold protein (tm0957) from thermotoga maritima msb8 at 1.90 A resolution

Method: X-RAY DIFFRACTION

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

hypothetical protein TM0957

Thermotoga maritima

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	CHLORIDE ION × 2 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	CHLORIDE ION × 1 water × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	MAGNESIUM ION × 1 water × 1	Consistent with protein count
4	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
5	Protein homooligomer	Homooligomer	Protein 2	CHLORIDE ION × 3 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9X052_THEMA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 13–197； UniProt 33–217 Author chain B； PDBConstruct 13–197； UniProt 33–217 Author chain C； PDBConstruct 13–197； UniProt 33–217 Author chain D； PDBConstruct 13–197； UniProt 33–217

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	2f4i
Deposition date deposition_date	2005-11-23
Structure title title	Crystal structure of an ob-fold protein (tm0957) from thermotoga maritima msb8 at 1.90 A resolution
Keywords keywords	Structural genomics, Joint Center for Structural Genomics, JCSG, Protein Structure Initiative, PSI-2, unknown function; UNKNOWN FUNCTION
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.

2f4i__assembly_3__model_1

Assembly 3 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2f4i__assembly_3__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2f4i__assembly_3__model_1 | P(r) · Pending

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

Rg（Guinier）	17.85 Å
Rg (electron density)	16.50 Å
Total Rg	17.60 Å
Atom count	1423
Residues	160
Excluded volume	25739 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2f4i__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2f4i__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`2f4i__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`2f4i__assembly_4__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`2f4i__assembly_5__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 (4)

Entity 1 Entity 1 polymer

Description description	hypothetical protein TM0957
Molecular weight formula_weight	23161.0 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	6251

MGSDKIHHHHHHEEMEKGFDPKRYARELWFKLQDMMNEGLGYDAVEVLNTLDENPELAHQKFAKVVGVSNYRYYIIQGVGEIVEIKDDGILVKVRENRKVPDLFLSNHIFGNGIVNATGIAKMEDFDRIIDFNLTATELNKIVKEEVVNSFLKQLSKGAGSVGSLVRFIAVFTLLKDEEIKYPIEAIPLYLEIQGGF

Source Source

Source organism organism	Thermotoga maritima
NCBI taxonomy ID ncbi_taxonomy_id	243274
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 3 Entity 3 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	484

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d2f4ia1
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.11 — TM0957-like
Family Family family	b.40.11.1 — TM0957-like

Domain ID domain_id	d2f4ib_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.11 — TM0957-like
Family Family family	b.40.11.1 — TM0957-like

Domain ID domain_id	d2f4ic_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.11 — TM0957-like
Family Family family	b.40.11.1 — TM0957-like

Domain ID domain_id	d2f4id_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.11 — TM0957-like
Family Family family	b.40.11.1 — TM0957-like

CATH v4.4 (8 domains)

Domain ID domain_id	2f4iA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	1260 — Envelope glycoprotein gp160, DUF2291, helical domain

Domain ID domain_id	2f4iA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	420 — Envelope glycoprotein gp160, DUF2291, alpha/beta domain

Domain ID domain_id	2f4iB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	1260 — Envelope glycoprotein gp160, DUF2291, helical domain

Domain ID domain_id	2f4iB02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	420 — Envelope glycoprotein gp160, DUF2291, alpha/beta domain

Domain ID domain_id	2f4iC01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	1260 — Envelope glycoprotein gp160, DUF2291, helical domain

Domain ID domain_id	2f4iC02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	420 — Envelope glycoprotein gp160, DUF2291, alpha/beta domain

Domain ID domain_id	2f4iD01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	1260 — Envelope glycoprotein gp160, DUF2291, helical domain

Domain ID domain_id	2f4iD02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	420 — Envelope glycoprotein gp160, DUF2291, alpha/beta domain

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Unit-cell length a length_a	65.677 Å
Unit-cell length b length_b	78.075 Å
Unit-cell length c length_c	82.487 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	93.40 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.250 Å
Low-resolution limit resolution_low	29.830 Å
R factor r_factor	0.1928
R_work r_work	0.1900
R_free r_free	0.2480

Crystal structure of an ob-fold protein (tm0957) from thermotoga maritima msb8 at 1.90 A resolution

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

hypothetical protein TM0957

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

2f4i__assembly_3__model_1

2f4i__assembly_3__model_1 | I(q)

2f4i__assembly_3__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Crystal structure of an ob-fold protein (tm0957) from thermotoga maritima msb8 at 1.90 A resolution

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

hypothetical protein TM0957

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

2f4i__assembly_3__model_1

2f4i__assembly_3__model_1 | I(q)

2f4i__assembly_3__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

CATH v4.4 (8 domains)

7. Citations (1)