SAXSdb — 2fjk

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

Fructose-bisphosphate aldolase

Thermus caldophilus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	1,3-DIHYDROXYACETONEPHOSPHATE × 4 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ALF_THECA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–305； UniProt 1–305 Author chain B； PDBConstruct 1–305； UniProt 1–305 Author chain C； PDBConstruct 1–305； UniProt 1–305 Author chain D； PDBConstruct 1–305； UniProt 1–305

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	2fjk
Deposition date deposition_date	2006-01-03
Structure title title	Crystal structure of Fructose-1,6-Bisphosphate Aldolase in Thermus caldophilus
Keywords keywords	beta-alpha-barrels, LYASE; LYASE
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.

2fjk__assembly_1__model_1

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

Download this curve (.dat)

2fjk__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2fjk__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	33.25 Å
Rg (electron density)	32.54 Å
Total Rg	32.76 Å
Atom count	9108
Residues	1160
Excluded volume	162940 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2fjk__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 (3)

Entity 1 Entity 1 polymer

Description description	Fructose-bisphosphate aldolase
Molecular weight formula_weight	33411.1 kDa
EC 编号 ec_number	4.1.2.13
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	9340

MLVTGLEILRKARAEGYGVGAFNTNNMEFTQAILEAAEEMKSPVILALSEGAMKYGGRALTRMVVALAQEARVPVAVHLDHGSSYESVLKALREGFTSVMIDKSHEDFETNVRETKRVVEAAHAVGVTVEAELGRLAGIEEHVAVDEKDALLTNPEEARIFMERTGADYLAVAIGTSHGAYKGKGRPFIDHPRLARIAKLVPAPLVLHGASAVPQELVERFRAAGGEIGEASGIHPEDIKKAISLGIAKINTDTDLRLAFTALVRETLGKNPKEFDPRKYLGPAREAVKEVVKSRMELFGSVGRA

Source Source

Source organism organism	Thermus caldophilus
NCBI taxonomy ID ncbi_taxonomy_id	272
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	1,3-DIHYDROXYACETONEPHOSPHATE
Molecular weight formula_weight	170.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	232

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d2fjka_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.10 — Aldolase
Family Family family	c.1.10.2 — Class II FBP aldolase

Domain ID domain_id	d2fjkb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.10 — Aldolase
Family Family family	c.1.10.2 — Class II FBP aldolase

Domain ID domain_id	d2fjkc_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.10 — Aldolase
Family Family family	c.1.10.2 — Class II FBP aldolase

Domain ID domain_id	d2fjkd_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.10 — Aldolase
Family Family family	c.1.10.2 — Class II FBP aldolase

CATH v4.4 (4 domains)

Domain ID domain_id	2fjkA00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	70 — Aldolase class I

Domain ID domain_id	2fjkB00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	70 — Aldolase class I

Domain ID domain_id	2fjkC00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	70 — Aldolase class I

Domain ID domain_id	2fjkD00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	70 — Aldolase class I

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Unit-cell length a length_a	98.900 Å
Unit-cell length b length_b	113.100 Å
Unit-cell length c length_c	115.700 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	16

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2420
R_work r_work	0.2370
R_free r_free	0.2860

Crystal structure of Fructose-1,6-Bisphosphate Aldolase in Thermus caldophilus

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

Fructose-bisphosphate aldolase

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

2fjk__assembly_1__model_1

2fjk__assembly_1__model_1 | I(q)

2fjk__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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Crystal structure of Fructose-1,6-Bisphosphate Aldolase in Thermus caldophilus

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

Fructose-bisphosphate aldolase

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

2fjk__assembly_1__model_1

2fjk__assembly_1__model_1 | I(q)

2fjk__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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)