SAXSdb — 2d8a

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

Probable L-threonine 3-dehydrogenase

Pyrococcus horikoshii

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	ZINC ION × 20 NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 4 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TDH_PYRHO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–348； UniProt 1–348

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	2d8a
Deposition date deposition_date	2005-12-02
Structure title title	Crystal Structure of PH0655 from Pyrococcus horikoshii OT3
Keywords keywords	;Pyrococcus horikoshii OT3, Structural genomics, PH0655, RIKEN Structural Genomics/Proteomics Initiative, RSGI, NPPSFA, National Project on Protein Structural and Functional Analyses, OXIDOREDUCTASE ;; OXIDOREDUCTASE
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.

2d8a__assembly_1__model_1

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

Download this curve (.dat)

2d8a__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2d8a__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	34.30 Å
Rg (electron density)	33.53 Å
Total Rg	34.25 Å
Atom count	10356
Residues	1308
Excluded volume	187250 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2d8a__assembly_1__model_1`	tetrameric （4）	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	Probable L-threonine 3-dehydrogenase
Molecular weight formula_weight	38153.8 kDa
EC 编号 ec_number	1.1.1.103
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	2852

MSEKMVAIMKTKPGYGAELVEVDVPKPGPGEVLIKVLATSICGTDLHIYEWNEWAQSRIKPPQIMGHEVAGEVVEIGPGVEGIEVGDYVSVETHIVCGKCYACRRGQYHVCQNTKIFGVDTDGVFAEYAVVPAQNIWKNPKSIPPEYATLQEPLGNAVDTVLAGPISGKSVLITGAGPLGLLGIAVAKASGAYPVIVSEPSDFRRELAKKVGADYVINPFEEDVVKEVMDITDGNGVDVFLEFSGAPKALEQGLQAVTPAGRVSLLGLYPGKVTIDFNNLIIFKALTIYGITGRHLWETWYTVSRLLQSGKLNLDPIITHKYKGFDKYEEAFELMRAGKTGKVVFMLK

Source Source

Source organism organism	Pyrococcus horikoshii
NCBI taxonomy ID ncbi_taxonomy_id	70601
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 3 Entity 3 non-polymer

Description description	NICOTINAMIDE-ADENINE-DINUCLEOTIDE
Molecular weight formula_weight	663.4 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	263

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	2d8aA01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	180 — Quinone Oxidoreductase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Medium-chain alcohol dehydrogenases, catalytic domain

Domain ID domain_id	2d8aA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	720 — NAD(P)-binding Rossmann-like Domain

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Unit-cell length a length_a	85.084 Å
Unit-cell length b length_b	89.436 Å
Unit-cell length c length_c	122.413 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	I 2 2 2
Space-group number int_tables_number	23
Crystal system crystal_system	—

Resolution resolution	2.050 Å
Low-resolution limit resolution_low	28.410 Å
R factor r_factor	0.2060
R_work r_work	0.2040
R_free r_free	0.2350

Crystal Structure of PH0655 from Pyrococcus horikoshii OT3

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

Probable L-threonine 3-dehydrogenase

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

2d8a__assembly_1__model_1

2d8a__assembly_1__model_1 | I(q)

2d8a__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 (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) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

Crystal Structure of PH0655 from Pyrococcus horikoshii OT3

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

Probable L-threonine 3-dehydrogenase

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

2d8a__assembly_1__model_1

2d8a__assembly_1__model_1 | I(q)

2d8a__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 (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) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)