SAXSdb — 1fp2

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

ISOFLAVONE O-METHYLTRANSFERASE

Medicago sativa

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	S-ADENOSYL-L-HOMOCYSTEINE × 2 4'-HYDROXY-7-METHOXYISOFLAVONE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	7OMT8_MEDSA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–352； UniProt 1–352

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	1fp2
Deposition date deposition_date	2000-08-29
Structure title title	CRYSTAL STRUCTURE ANALYSIS OF ISOFLAVONE O-METHYLTRANSFERASE
Keywords keywords	protein-product complex, TRANSFERASE; TRANSFERASE
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.

1fp2__assembly_1__model_1

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

Download this curve (.dat)

1fp2__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1fp2__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	29.76 Å
Rg (electron density)	28.98 Å
Total Rg	29.58 Å
Atom count	5562
Residues	690
Excluded volume	100170 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1fp2__assembly_1__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	ISOFLAVONE O-METHYLTRANSFERASE
Molecular weight formula_weight	39648.7 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	3028

MASSINGRKPSEIFKAQALLYKHIYAFIDSMSLKWAVEMNIPNIIQNHGKPISLSNLVSILQVPSSKIGNVRRLMRYLAHNGFFEIITKEEESYALTVASELLVRGSDLCLAPMVECVLDPTLSGSYHELKKWIYEEDLTLFGVTLGSGFWDFLDKNPEYNTSFNDAMASDSKLINLALRDCDFVFDGLESIVDVGGGTGTTAKIICETFPKLKCIVFDRPQVVENLSGSNNLTYVGGDMFTSIPNADAVLLKYILHNWTDKDCLRILKKCKEAVTNDGKRGKVTIIDMVIDKKKDENQVTQIKLLMDVNMACLNGKERNEEEWKKLFIEAGFQHYKISPLTGFLSLIEIYP

Source Source

Source organism organism	Medicago sativa
NCBI taxonomy ID ncbi_taxonomy_id	3879
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	S-ADENOSYL-L-HOMOCYSTEINE
Molecular weight formula_weight	384.4 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	4'-HYDROXY-7-METHOXYISOFLAVONE
Molecular weight formula_weight	268.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	247

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1fp2a1
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.5 — 'Winged helix' DNA-binding domain
Family Family family	a.4.5.29 — Plant O-methyltransferase, N-terminal domain

Domain ID domain_id	d1fp2a2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.66 — S-adenosyl-L-methionine-dependent methyltransferases
Superfamily Superfamily superfamily	c.66.1 — S-adenosyl-L-methionine-dependent methyltransferases
Family Family family	c.66.1.12 — Plant O-methyltransferase, C-terminal domain

CATH v4.4 (2 domains)

Domain ID domain_id	1fp2A01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	1fp2A02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	150 — Vaccinia Virus protein VP39

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Unit-cell length a length_a	145.556 Å
Unit-cell length b length_b	50.538 Å
Unit-cell length c length_c	63.824 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	106.69 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	1.400 Å
Low-resolution limit resolution_low	69.710 Å
R factor r_factor	0.2170
R_work r_work	0.2170
R_free r_free	0.2330

CRYSTAL STRUCTURE ANALYSIS OF ISOFLAVONE O-METHYLTRANSFERASE

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

ISOFLAVONE O-METHYLTRANSFERASE

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

1fp2__assembly_1__model_1

1fp2__assembly_1__model_1 | I(q)

1fp2__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 (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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

CRYSTAL STRUCTURE ANALYSIS OF ISOFLAVONE O-METHYLTRANSFERASE

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

ISOFLAVONE O-METHYLTRANSFERASE

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

1fp2__assembly_1__model_1

1fp2__assembly_1__model_1 | I(q)

1fp2__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 (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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)