SAXSdb — 2aov

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

Histamine N-methyltransferase

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	4-(DIMETHYLAMINO)BUTYL IMIDOTHIOCARBAMATE × 1 5-(3,4-DICHLOROPHENYL)-6-METHYLPYRIMIDINE-2,4-DIAMINE × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	4-(DIMETHYLAMINO)BUTYL IMIDOTHIOCARBAMATE × 1 5-(3,4-DICHLOROPHENYL)-6-METHYLPYRIMIDINE-2,4-DIAMINE × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	HNMT_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–292； UniProt 1–292 Author chain B； PDBConstruct 1–292； UniProt 1–292

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	2aov
Deposition date deposition_date	2005-08-14
Structure title title	Histamine Methyltransferase Complexed with the Antifolate Drug Metoprine
Keywords keywords	CLASSIC METHYLTRANSFERASE FOLD, PROTEIN-DRUG 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.

2aov__assembly_1__model_1

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

Download this curve (.dat)

2aov__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2aov__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.73 Å
Rg (electron density)	19.50 Å
Total Rg	20.35 Å
Atom count	2246
Residues	288
Excluded volume	40031 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2aov__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2aov__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Description description	Histamine N-methyltransferase
Molecular weight formula_weight	33333.0 kDa
EC 编号 ec_number	2.1.1.8
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4676

MASSMRSLFSDHGKYVESFRRFLNHSTEHQCMQEFMDKKLPGIIGRIGDTKSEIKILSIGGGAGEIDLQILSKVQAQYPGVCINNEVVEPSAEQIAKYKELVAKTSNLENVKFAWHKETSSEYQSRMLEKKELQKWDFIHMIQMLYYVKDIPATLKFFHSLLGTNAKMLIIVVSGSSGWDKLWKKYGSRFPQDDLCQYITSDDLTQMLDNLGLKYECYDLLSTMDISDCFIDGNENGDLLWDFLTETCNFNATAPPDLRAELGKDLQEPEFSAKKEGKVLFNNTLSFIVIEA

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	4-(DIMETHYLAMINO)BUTYL IMIDOTHIOCARBAMATE
Molecular weight formula_weight	175.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	5-(3,4-DICHLOROPHENYL)-6-METHYLPYRIMIDINE-2,4-DIAMINE
Molecular weight formula_weight	269.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	91

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2aova_
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.66.1.19 — Histamine methyltransferase

Domain ID domain_id	d2aovb_
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.66.1.19 — Histamine methyltransferase

CATH v4.4 (2 domains)

Domain ID domain_id	2aovA00
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

Domain ID domain_id	2aovB00
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	132.890 Å
Unit-cell length b length_b	132.890 Å
Unit-cell length c length_c	65.050 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	12

Space group space_group	P 6
Space-group number int_tables_number	168
Crystal system crystal_system	—

Resolution resolution	2.480 Å
Low-resolution limit resolution_low	28.000 Å
R factor r_factor	0.2160
R_work r_work	0.2110
R_free r_free	0.2540

Histamine Methyltransferase Complexed with the Antifolate Drug Metoprine

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

Histamine N-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

2aov__assembly_1__model_1

2aov__assembly_1__model_1 | I(q)

2aov__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 (2)

Histamine Methyltransferase Complexed with the Antifolate Drug Metoprine

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

Histamine N-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

2aov__assembly_1__model_1

2aov__assembly_1__model_1 | I(q)

2aov__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 (2)