1oq7

The crystal structure of the iron free (Apo-)form of Stearoyl Acyl Carrier Protein Desaturase from Ricinus Communis (Castor Bean).

Method: X-RAY DIFFRACTION

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

Acyl-[acyl-carrier protein] desaturase

Ricinus communis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	STRONTIUM ION × 4	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	STRONTIUM ION × 4	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 2	STRONTIUM ION × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	STAD_RICCO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–363； UniProt 34–396 Author chain B； PDBConstruct 1–363； UniProt 34–396 Author chain C； PDBConstruct 1–363； UniProt 34–396 Author chain D； PDBConstruct 1–363； UniProt 34–396 Author chain E； PDBConstruct 1–363； UniProt 34–396 Author chain F； PDBConstruct 1–363； UniProt 34–396

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	1oq7
Deposition date deposition_date	2003-03-07
Structure title title	The crystal structure of the iron free (Apo-)form of Stearoyl Acyl Carrier Protein Desaturase from Ricinus Communis (Castor Bean).
Keywords keywords	di-iron enzyme, four-helix bundle, fatty acid biosynthesis, electron transfer, 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.

1oq7__assembly_3__model_1

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

Download this curve (.dat)

1oq7__assembly_3__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1oq7__assembly_3__model_1 | P(r) · Pending

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

Rg（Guinier）	26.77 Å
Rg (electron density)	25.72 Å
Total Rg	26.65 Å
Atom count	5616
Residues	692
Excluded volume	99744 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1oq7__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1oq7__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1oq7__assembly_3__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 (2)

Entity 1 Entity 1 polymer

Description description	Acyl-[acyl-carrier protein] desaturase
Molecular weight formula_weight	41703.3 kDa
EC 编号 ec_number	1.14.19.2
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	16848

ASTLKSGSKEVENLKKPFMPPREVHVQVTHSMPPQKIEIFKSLDNWAEENILVHLKPVEKCWQPQDFLPDPASDGFDEQVRELRERAKEIPDDYFVVLVGDMITEEALPTYQTMLNTLDGVRDETGASPTSWAIWTRAWTAEENRHGDLLNKYLYLSGRVDMRQIEKTIQYLIGSGMDPRTENSPYLGFIYTSFQERATFISHGNTARQAKEHGDIKLAQICGTIAADEKRHETAYTKIVEKLFEIDPDGTVLAFADMMRKKISMPAHLMYDGRDDNLFDHFSAVAQRLGVYTAKDYADILEFLVGRWKVDKLTGLSAEGQKAQDYVCRLPPRIRRLEERAQGRAKEAPTMPFSWIFDRQVKL

Source Source

Source organism organism	Ricinus communis
Common name common_name	castor bean
NCBI taxonomy ID ncbi_taxonomy_id	3988
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	STRONTIUM ION
Molecular weight formula_weight	87.6 kDa
Source method src_method	syn
Copy count entity_count	12

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1oq7a_
Class class	a — All alpha proteins
Fold Fold fold	a.25 — Ferritin-like
Superfamily Superfamily superfamily	a.25.1 — Ferritin-like
Family Family family	a.25.1.2 — Ribonucleotide reductase-like

Domain ID domain_id	d1oq7b_
Class class	a — All alpha proteins
Fold Fold fold	a.25 — Ferritin-like
Superfamily Superfamily superfamily	a.25.1 — Ferritin-like
Family Family family	a.25.1.2 — Ribonucleotide reductase-like

Domain ID domain_id	d1oq7c_
Class class	a — All alpha proteins
Fold Fold fold	a.25 — Ferritin-like
Superfamily Superfamily superfamily	a.25.1 — Ferritin-like
Family Family family	a.25.1.2 — Ribonucleotide reductase-like

Domain ID domain_id	d1oq7d_
Class class	a — All alpha proteins
Fold Fold fold	a.25 — Ferritin-like
Superfamily Superfamily superfamily	a.25.1 — Ferritin-like
Family Family family	a.25.1.2 — Ribonucleotide reductase-like

Domain ID domain_id	d1oq7e_
Class class	a — All alpha proteins
Fold Fold fold	a.25 — Ferritin-like
Superfamily Superfamily superfamily	a.25.1 — Ferritin-like
Family Family family	a.25.1.2 — Ribonucleotide reductase-like

Domain ID domain_id	d1oq7f_
Class class	a — All alpha proteins
Fold Fold fold	a.25 — Ferritin-like
Superfamily Superfamily superfamily	a.25.1 — Ferritin-like
Family Family family	a.25.1.2 — Ribonucleotide reductase-like

CATH v4.4 (6 domains)

Domain ID domain_id	1oq7A00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	620 — Ribonucleotide Reductase, subunit A
Homologous superfamily homologous superfamily	20 — Ribonucleotide Reductase, subunit A

Domain ID domain_id	1oq7B00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	620 — Ribonucleotide Reductase, subunit A
Homologous superfamily homologous superfamily	20 — Ribonucleotide Reductase, subunit A

Domain ID domain_id	1oq7C00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	620 — Ribonucleotide Reductase, subunit A
Homologous superfamily homologous superfamily	20 — Ribonucleotide Reductase, subunit A

Domain ID domain_id	1oq7D00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	620 — Ribonucleotide Reductase, subunit A
Homologous superfamily homologous superfamily	20 — Ribonucleotide Reductase, subunit A

Domain ID domain_id	1oq7E00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	620 — Ribonucleotide Reductase, subunit A
Homologous superfamily homologous superfamily	20 — Ribonucleotide Reductase, subunit A

Domain ID domain_id	1oq7F00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	620 — Ribonucleotide Reductase, subunit A
Homologous superfamily homologous superfamily	20 — Ribonucleotide Reductase, subunit A

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Unit-cell length a length_a	188.033 Å
Unit-cell length b length_b	188.033 Å
Unit-cell length c length_c	82.047 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	18

Space group space_group	P 31
Space-group number int_tables_number	144
Crystal system crystal_system	—

Resolution resolution	3.200 Å
Low-resolution limit resolution_low	19.960 Å
R factor r_factor	0.2293
R_work r_work	0.2285
R_free r_free	0.2571

The crystal structure of the iron free (Apo-)form of Stearoyl Acyl Carrier Protein Desaturase from Ricinus Communis (Castor Bean).

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

Acyl-[acyl-carrier protein] desaturase

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

1oq7__assembly_3__model_1

1oq7__assembly_3__model_1 | I(q)

1oq7__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)

The crystal structure of the iron free (Apo-)form of Stearoyl Acyl Carrier Protein Desaturase from Ricinus Communis (Castor Bean).

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

Acyl-[acyl-carrier protein] desaturase

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

1oq7__assembly_3__model_1

1oq7__assembly_3__model_1 | I(q)

1oq7__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)