SAXSdb — 3tik

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

sterol 14-alpha demethylase (CYP51)

Trypanosoma brucei

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	PROTOPORPHYRIN IX CONTAINING FE × 4 6-[(R)-(4-chlorophenyl)(methoxy)(1-methyl-1H-imidazol-5-yl)methyl]-4-(2,6-difluorophenyl)-1-methylquinolin-2(1H)-one × 4 water × 4	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	PROTOPORPHYRIN IX CONTAINING FE × 2 6-[(R)-(4-chlorophenyl)(methoxy)(1-methyl-1H-imidazol-5-yl)methyl]-4-(2,6-difluorophenyl)-1-methylquinolin-2(1H)-one × 2 water × 2	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 2	PROTOPORPHYRIN IX CONTAINING FE × 2 6-[(R)-(4-chlorophenyl)(methoxy)(1-methyl-1H-imidazol-5-yl)methyl]-4-(2,6-difluorophenyl)-1-methylquinolin-2(1H)-one × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q385E8_9TRYP
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 5–454； UniProt 32–481 Author chain B； PDBConstruct 5–454； UniProt 32–481 Author chain C； PDBConstruct 5–454； UniProt 32–481 Author chain D； PDBConstruct 5–454； UniProt 32–481

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	3tik
Deposition date deposition_date	2011-08-20
Structure title title	Sterol 14-alpha demethylase (CYP51) from Trypanosoma brucei in complex with the tipifarnib derivative 6-((4-chlorophenyl)(methoxy)(1-methyl-1H-imidazol-5-yl)methyl)-4-(2,6-difluorophenyl)-1-methylquinolin-2(1H)-one
Keywords keywords	;STEROL 14-ALPHA DEMETHYLASE, CYP51, HEME, MONOOXYGENASE, STEROL BIOSYNTHESIS, Cytochrome P450 fold, oxidoreductase, cytochrome P450 reductase, endoplasmic reticulum membrane ;; 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.

3tik__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3tik__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3tik__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	31.48 Å
Rg (electron density)	30.30 Å
Total Rg	30.95 Å
Atom count	7308
Residues	900
Excluded volume	131240 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3tik__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3tik__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`3tik__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 (4)

Entity 1 Entity 1 polymer

Description description	sterol 14-alpha demethylase (CYP51)
Molecular weight formula_weight	51302.6 kDa
EC 编号 ec_number	1.14.13.70
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	14911

KGKLPPVYPVTVPILGHIIQFGKSPLGFMQECKRQLKSGIFTINIVGKRVTIVGDPHEHSRFFLPRNEVLSPREVYSFMVPVFGEGVAYAAPYPRMREQLNFLAEELTIAKFQNFVPAIQHEVRKFMAANWDKDEGEINLLEDCSTMIINTACQCLFGEDLRKRLDARRFAQLLAKMESSLIPAAVFLPILLKLPLPQSARCHEARTELQKILSEIIIARKEEEVNKDSSTSDLLSGLLSAVYRDGTPMSLHEVCGMIVAAMFAGQHTSSITTTWSMLHLMHPANVKHLEALRKEIEEFPAQLNYNNVMDEMPFAERCARESIRRDPPLLMLMRKVMADVKVGSYVVPKGDIIACSPLLSHHDEEAFPEPRRWDPERDEKVEGAFIGFGAGVHKCIGQKFGLLQVKTILATAFRSYDFQLLRDEVPDPDYHTMVVGPTASQCRVKYIRRKAAAA

Source Source

Source organism organism	Trypanosoma brucei
NCBI taxonomy ID ncbi_taxonomy_id	5691
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	PROTOPORPHYRIN IX CONTAINING FE
Molecular weight formula_weight	616.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	6-[(R)-(4-chlorophenyl)(methoxy)(1-methyl-1H-imidazol-5-yl)methyl]-4-(2,6-difluorophenyl)-1-methylquinolin-2(1H)-one
Molecular weight formula_weight	505.9 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	295

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d3tika1
Class class	a — All alpha proteins
Fold Fold fold	a.104 — Cytochrome P450
Superfamily Superfamily superfamily	a.104.1 — Cytochrome P450
Family Family family	a.104.1.0 — automated matches

Domain ID domain_id	d3tika2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3tikb1
Class class	a — All alpha proteins
Fold Fold fold	a.104 — Cytochrome P450
Superfamily Superfamily superfamily	a.104.1 — Cytochrome P450
Family Family family	a.104.1.0 — automated matches

Domain ID domain_id	d3tikb2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3tikc1
Class class	a — All alpha proteins
Fold Fold fold	a.104 — Cytochrome P450
Superfamily Superfamily superfamily	a.104.1 — Cytochrome P450
Family Family family	a.104.1.0 — automated matches

Domain ID domain_id	d3tikc2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3tikd1
Class class	a — All alpha proteins
Fold Fold fold	a.104 — Cytochrome P450
Superfamily Superfamily superfamily	a.104.1 — Cytochrome P450
Family Family family	a.104.1.0 — automated matches

Domain ID domain_id	d3tikd2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (4 domains)

Domain ID domain_id	3tikA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	630 — Cytochrome p450
Homologous superfamily homologous superfamily	10 — Cytochrome P450

Domain ID domain_id	3tikB00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	630 — Cytochrome p450
Homologous superfamily homologous superfamily	10 — Cytochrome P450

Domain ID domain_id	3tikC00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	630 — Cytochrome p450
Homologous superfamily homologous superfamily	10 — Cytochrome P450

Domain ID domain_id	3tikD00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	630 — Cytochrome p450
Homologous superfamily homologous superfamily	10 — Cytochrome P450

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Unit-cell length a length_a	59.722 Å
Unit-cell length b length_b	79.715 Å
Unit-cell length c length_c	117.521 Å
Unit-cell angle α angle_alpha	74.47 °
Unit-cell angle β angle_beta	81.58 °
Unit-cell angle γ angle_gamma	68.05 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	2.050 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.1889
R_work r_work	0.1859
R_free r_free	0.2434

Sterol 14-alpha demethylase (CYP51) from Trypanosoma brucei in complex with the tipifarnib derivative 6-((4-chlorophenyl)(methoxy)(1-methyl-1H-imidazol-5-yl)methyl)-4-(2,6-difluorophenyl)-1-methylquinolin-2(1H)-one

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

sterol 14-alpha demethylase (CYP51)

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

3tik__assembly_2__model_1

3tik__assembly_2__model_1 | I(q)

3tik__assembly_2__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 (8 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Sterol 14-alpha demethylase (CYP51) from Trypanosoma brucei in complex with the tipifarnib derivative 6-((4-chlorophenyl)(methoxy)(1-methyl-1H-imidazol-5-yl)methyl)-4-(2,6-difluorophenyl)-1-methylquinolin-2(1H)-one

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

sterol 14-alpha demethylase (CYP51)

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

3tik__assembly_2__model_1

3tik__assembly_2__model_1 | I(q)

3tik__assembly_2__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 (8 domains)

CATH v4.4 (4 domains)

7. Citations (1)