1afr

STEAROYL-ACYL CARRIER PROTEIN DESATURASE FROM CASTOR SEEDS

Method: X-RAY DIFFRACTION

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

DELTA9 STEAROYL-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	FE (II) ION × 4 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	FE (II) ION × 4 water × 2	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 2	FE (II) ION × 4 water × 2	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 1–345； UniProt 52–396 Author chain B； PDBConstruct 1–345； UniProt 52–396 Author chain C； PDBConstruct 1–345； UniProt 52–396 Author chain D； PDBConstruct 1–345； UniProt 52–396 Author chain E； PDBConstruct 1–345； UniProt 52–396 Author chain F； PDBConstruct 1–345； UniProt 52–396

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	1afr
Deposition date deposition_date	1997-03-13
Structure title title	STEAROYL-ACYL CARRIER PROTEIN DESATURASE FROM CASTOR SEEDS
Keywords keywords	OXIDOREDUCTASE, FATTY ACID DESATURASE, FATTY ACID BIOSYNTHESIS, BINUCLEAR IRON CENTER, ELECTRON TRANSFER; 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.

1afr__assembly_1__model_1

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

Download this curve (.dat)

1afr__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1afr__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.74 Å
Rg (electron density)	25.73 Å
Total Rg	26.61 Å
Atom count	5596
Residues	690
Excluded volume	99243 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1afr__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1afr__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1afr__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 (3)

Entity 1 Entity 1 polymer

Description description	DELTA9 STEAROYL-ACYL CARRIER PROTEIN DESATURASE
Molecular weight formula_weight	39754.1 kDa
EC 编号 ec_number	1.14.99.6
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	17326

MPPREVHVQVTHSMPPQKIEIFKSLDNWAEENILVHLKPVEKCWQPQDFLPDPASDGFDEQVRELRERAKEIPDDYFVVLVGDMITEEALPTYQTMLNTLDGVRDETGASPTSWAIWTRAWTAEENRHGDLLNKYLYLSGRVDMRQIEKTIQYLIGSGMDPRTENSPYLGFIYTSFQERATFISHGNTARQAKEHGDIKLAQICGTIAADEKRHETAYTKIVEKLFEIDPDGTVLAFADMMRKKISMPAHLMYDGRDDNLFDHFSAVAQRLGVYTAKDYADILEFLVGRWKVDKLTGLSAEGQKAQDYVCRLPPRIRRLEERAQGRAKEAPTMPFSWIFDRQVKL

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	FE (II) ION
Molecular weight formula_weight	55.8 kDa
Source method src_method	syn
Copy count entity_count	12

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	538

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1afra_
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	d1afrb_
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	d1afrc_
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	d1afrd_
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	d1afre_
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	d1afrf_
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	1afrA00
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	1afrB00
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	1afrC00
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	1afrD00
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	1afrE00
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	1afrF00
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	82.200 Å
Unit-cell length b length_b	147.800 Å
Unit-cell length c length_c	198.200 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	24

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

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	7.000 Å
R factor r_factor	0.2200
R_work r_work	0.2200
R_free r_free	0.2850

STEAROYL-ACYL CARRIER PROTEIN DESATURASE FROM CASTOR SEEDS

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

DELTA9 STEAROYL-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

1afr__assembly_1__model_1

1afr__assembly_1__model_1 | I(q)

1afr__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (2)

STEAROYL-ACYL CARRIER PROTEIN DESATURASE FROM CASTOR SEEDS

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

DELTA9 STEAROYL-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

1afr__assembly_1__model_1

1afr__assembly_1__model_1 | I(q)

1afr__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (2)