SAXSdb — 3a51

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

Vitamin D hydroxylase

Pseudonocardia autotrophica

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	PROTOPORPHYRIN IX CONTAINING FE × 1 3-{2-[1-(5-HYDROXY-1,5-DIMETHYL-HEXYL)-7A-METHYL-OCTAHYDRO-INDEN-4-YLIDENE]-ETHYLIDENE}-4-METHYLENE-CYCLOHEXANOL × 1 CALCIUM ION × 3 GLYCEROL × 2 ACETATE ION × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	PROTOPORPHYRIN IX CONTAINING FE × 1 3-{2-[1-(5-HYDROXY-1,5-DIMETHYL-HEXYL)-7A-METHYL-OCTAHYDRO-INDEN-4-YLIDENE]-ETHYLIDENE}-4-METHYLENE-CYCLOHEXANOL × 1 ACETATE ION × 1 water × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	PROTOPORPHYRIN IX CONTAINING FE × 1 3-{2-[1-(5-HYDROXY-1,5-DIMETHYL-HEXYL)-7A-METHYL-OCTAHYDRO-INDEN-4-YLIDENE]-ETHYLIDENE}-4-METHYLENE-CYCLOHEXANOL × 1 CALCIUM ION × 1 ACETATE ION × 2 water × 1	Consistent with protein count
4	Protein monomer	Monomer	Protein 1	PROTOPORPHYRIN IX CONTAINING FE × 1 3-{2-[1-(5-HYDROXY-1,5-DIMETHYL-HEXYL)-7A-METHYL-OCTAHYDRO-INDEN-4-YLIDENE]-ETHYLIDENE}-4-METHYLENE-CYCLOHEXANOL × 1 CALCIUM ION × 1 ACETATE ION × 1 water × 1	Consistent with protein count
5	Protein monomer	Monomer	Protein 1	PROTOPORPHYRIN IX CONTAINING FE × 1 3-{2-[1-(5-HYDROXY-1,5-DIMETHYL-HEXYL)-7A-METHYL-OCTAHYDRO-INDEN-4-YLIDENE]-ETHYLIDENE}-4-METHYLENE-CYCLOHEXANOL × 1 CALCIUM ION × 1 ACETATE ION × 2 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	C4B644_9PSEU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–403； UniProt 1–403 Author chain B； PDBConstruct 1–403； UniProt 1–403 Author chain C； PDBConstruct 1–403； UniProt 1–403 Author chain D； PDBConstruct 1–403； UniProt 1–403 Author chain E； PDBConstruct 1–403； UniProt 1–403

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	3a51
Deposition date deposition_date	2009-07-24
Structure title title	Structure of cytochrome P450 Vdh mutant (Vdh-K1) obtained by directed evolution with bound 25-hydroxyvitamin D3
Keywords keywords	Cytochrome P450, vitamin D3 hydroxylase, hemoprotein, monooxygenase, directed evolution, 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.

3a51__assembly_1__model_1

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

Download this curve (.dat)

3a51__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3a51__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	22.54 Å
Rg (electron density)	21.07 Å
Total Rg	22.00 Å
Atom count	3204
Residues	402
Excluded volume	57224 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3a51__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3a51__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`3a51__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`3a51__assembly_4__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`3a51__assembly_5__model_1`	monomeric （1）	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 (7)

Entity 1 Entity 1 polymer

Description description	Vitamin D hydroxylase
Molecular weight formula_weight	45587.9 kDa
Mutation mutation	T70R, V156L, E216M, E384R
Source method src_method	man
Copy count entity_count	5

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E
Atom count atom_count	17293

MALTTTGTEQHDLFSGTFWQNPHPAYAALRAEDPVRKLALPDGPVWLLTRYADVREAFVDPRLSKDWRHRLPEDQRADMPATPTPMMILMDPPDHTRLRKLVGRSFTVRRMNELEPRITEIADGLLAGLPTDGPVDLMREYAFQIPVQVICELLGLPAEDRDDFSAWSSVLVDDSPADDKNAAMGKLHGYLSDLLERKRTEPDDALLSSLLAVSDMDGDRLSQEELVAMAMLLLIAGHETTVNLIGNGVLALLTHPDQRKLLAEDPSLISSAVEEFLRFDSPVSQAPIRFTAEDVTYSGVTIPAGEMVMLGLAAANRDADWMPEPDRLDITRDASGGVFFGHGIHFCLGAQLARLEGRVAIGRLFADRPELALAVGLDELVYRRSTLVRGLSRMPVTMGPRSALEHHHHHH

Source Source

Source organism organism	Pseudonocardia autotrophica
NCBI taxonomy ID ncbi_taxonomy_id	2074
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	5

Entity 3 Entity 3 non-polymer

Description description	3-{2-[1-(5-HYDROXY-1,5-DIMETHYL-HEXYL)-7A-METHYL-OCTAHYDRO-INDEN-4-YLIDENE]-ETHYLIDENE}-4-METHYLENE-CYCLOHEXANOL
Molecular weight formula_weight	400.6 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 4 Entity 4 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 5 Entity 5 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 non-polymer

Description description	ACETATE ION
Molecular weight formula_weight	59.0 kDa
Source method src_method	syn
Copy count entity_count	7

Entity 7 Entity 7 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	1319

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d3a51a_
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	d3a51b_
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	d3a51c_
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	d3a51d_
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	d3a51e_
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

CATH v4.4 (5 domains)

Domain ID domain_id	3a51A00
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	3a51B00
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	3a51C00
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	3a51D00
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	3a51E00
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	77.173 Å
Unit-cell length b length_b	171.800 Å
Unit-cell length c length_c	189.143 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	20

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

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	45.600 Å
R factor r_factor	0.1989
R_work r_work	0.1970
R_free r_free	0.2340

Structure of cytochrome P450 Vdh mutant (Vdh-K1) obtained by directed evolution with bound 25-hydroxyvitamin D3

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

Vitamin D hydroxylase

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

3a51__assembly_1__model_1

3a51__assembly_1__model_1 | I(q)

3a51__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 (7)

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 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

CATH v4.4 (5 domains)

7. Citations (1)

Structure of cytochrome P450 Vdh mutant (Vdh-K1) obtained by directed evolution with bound 25-hydroxyvitamin D3

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

Vitamin D hydroxylase

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

3a51__assembly_1__model_1

3a51__assembly_1__model_1 | I(q)

3a51__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 (7)

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 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

CATH v4.4 (5 domains)

7. Citations (1)