SAXSdb — 1tv4

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

Monomethylamine methyltransferase mtmB1

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 6	SULFATE ION × 60 3-METHYL-5-SULFO-PYRROLIDINE-2-CARBOXYLIC ACID × 6 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MTMB1_METBA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–458； UniProt 1–457

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	1tv4
Deposition date deposition_date	2004-06-26
Structure title title	Crystal structure of the sulfite MtmB complex
Keywords keywords	Tim barrel, 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.

1tv4__assembly_1__model_1

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

Download this curve (.dat)

1tv4__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1tv4__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	39.93 Å
Rg (electron density)	39.40 Å
Total Rg	39.94 Å
Atom count	21318
Residues	2742
Excluded volume	377870 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1tv4__assembly_1__model_1`	hexameric （6）	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	Monomethylamine methyltransferase mtmB1
Molecular weight formula_weight	50183.1 kDa
EC 编号 ec_number	2.1.1.-
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	4128

MTFRKSFDCYDFYDRAKVGEKCTQDDWDLMKIPMKAMELKQKYGLDFKGEFIPTDKDMMEKLFKAGFEMLLECGIYCTDTHRIVKYTEDEIWDAINNVQKEFVLGTGRDAVNVRKRSVGDKAKPIVQGGPTGSPISEDVFMPVHMSYALEKEVDTIVNGVMTSVRGKSPIPKSPYEVLAAKTETRLIKNACAMAGRPGMGVKGPETSLSAQGNISADCTGGMTCTDSHEVSQLNELKIDLDAISVIAHYKGNSDIIMDEQMPIFGGYAGGIEETTIVDVATHINAVLMSSASWHLDGPVHIRWGSTNTRETLMIAGWACATISEFTDILSGNQYYPCAGPCTEMCLLEASAQSITDTASGREILSGVASAKGVVTDKTTGMEARMMGEVARATAGVEISEVNVILDKLVSLYEKNYASAPAGKTFQECYDVKTVTPTEEYMQVYDGARKKLEDLGLVF

Entity 2 Entity 2 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	10

Entity 3 Entity 3 non-polymer

Description description	3-METHYL-5-SULFO-PYRROLIDINE-2-CARBOXYLIC ACID
Molecular weight formula_weight	209.2 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	470

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d1tv4a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.25 — Monomethylamine methyltransferase MtmB
Family Family family	c.1.25.1 — Monomethylamine methyltransferase MtmB

CATH v4.4 (1 domains)

Domain ID domain_id	1tv4A00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	460 — Monomethylamine methyltransferase MtmB

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Unit-cell length a length_a	158.820 Å
Unit-cell length b length_b	158.820 Å
Unit-cell length c length_c	136.333 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 63 2 2
Space-group number int_tables_number	182
Crystal system crystal_system	—

Resolution resolution	1.800 Å
Low-resolution limit resolution_low	19.850 Å
R factor r_factor	0.1740
R_work r_work	0.1740
R_free r_free	0.1870

Crystal structure of the sulfite MtmB complex

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

Monomethylamine methyltransferase mtmB1

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

1tv4__assembly_1__model_1

1tv4__assembly_1__model_1 | I(q)

1tv4__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

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Crystal structure of the sulfite MtmB complex

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

Monomethylamine methyltransferase mtmB1

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

1tv4__assembly_1__model_1

1tv4__assembly_1__model_1 | I(q)

1tv4__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

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)