1o9t

Methionine adenosyltransferase complexed with both substrates ATP and methionine

Method: X-RAY DIFFRACTION

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

S-ADENOSYLMETHIONINE SYNTHETASE

RATTUS NORVEGICUS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	METHIONINE × 2 PHOSPHATE ION × 4 MAGNESIUM ION × 6 POTASSIUM ION × 4 ADENOSINE-5'-TRIPHOSPHATE × 2 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	METL_RAT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–344； UniProt 1–344 Author chain A； PDBConstruct 345–396； UniProt 346–397 Author chain B； PDBConstruct 1–344； UniProt 1–344 Author chain B； PDBConstruct 345–396； UniProt 346–397

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	1o9t
Deposition date deposition_date	2002-12-18
Structure title title	Methionine adenosyltransferase complexed with both substrates ATP and methionine
Keywords keywords	;TRANSFERASE, ADENOSYLTRANSFERASE, ATP BINDING, METHIONINE BINDING, ONE-CARBON METABOLISM, MAGNESIUM, POTASSIUM, METAL-BINDING, MULTIGENE FAMILY, ATP-BINDING ;; 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.

1o9t__assembly_1__model_1

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

Download this curve (.dat)

1o9t__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1o9t__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	36.00 Å
Rg (electron density)	36.18 Å
Total Rg	36.45 Å
Atom count	11494
Residues	1472
Excluded volume	205090 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1o9t__assembly_1__model_1`	tetrameric （4）	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	S-ADENOSYLMETHIONINE SYNTHETASE
Molecular weight formula_weight	43637.7 kDa
EC 编号 ec_number	2.5.1.6
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	5923

MNGPVDGLCDHSLSEEGAFMFTSESVGEGHPDKICDQISDAVLDAHLKQDPNAKVACETVCKTGMVLLCGEITSMAMIDYQRVVRDTIKHIGYDDSAKGFDFKTCNVLVALEQQSPDIAQCVHLDRNEEDVGAGDQGLMFGYATDETEECMPLTIVLAHKLNTRMADLRRSGVLPWLRPDSKTQVTVQYVQDNGAVIPVRVHTIVISVQHNEDITLEAMREALKEQVIKAVVPAKYLDEDTIYHLQPSGRFVIGGPQGDAGVTGRKIIVDTYGGWGAHGGGAFSGKDYTKVDRSAAYAARWVAKSLVKAGLCRRVLVQVSYAIGVAEPLSISIFTYGTSKKTERELLEVVNKNFDLRPGVIVRDLDLKKPIYQKTACYGHFGRSEFPWEVPKKLVF

Source Source

Source organism organism	RATTUS NORVEGICUS
Common name common_name	RAT
NCBI taxonomy ID ncbi_taxonomy_id	10116
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	METHIONINE
Molecular weight formula_weight	149.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 5 Entity 5 non-polymer

Description description	POTASSIUM ION
Molecular weight formula_weight	39.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 non-polymer

Description description	ADENOSINE-5'-TRIPHOSPHATE
Molecular weight formula_weight	507.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 7 Entity 7 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	176

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1o9ta1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.130 — S-adenosylmethionine synthetase
Superfamily Superfamily superfamily	d.130.1 — S-adenosylmethionine synthetase
Family Family family	d.130.1.1 — S-adenosylmethionine synthetase

Domain ID domain_id	d1o9ta2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.130 — S-adenosylmethionine synthetase
Superfamily Superfamily superfamily	d.130.1 — S-adenosylmethionine synthetase
Family Family family	d.130.1.1 — S-adenosylmethionine synthetase

Domain ID domain_id	d1o9ta3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.130 — S-adenosylmethionine synthetase
Superfamily Superfamily superfamily	d.130.1 — S-adenosylmethionine synthetase
Family Family family	d.130.1.1 — S-adenosylmethionine synthetase

Domain ID domain_id	d1o9tb1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.130 — S-adenosylmethionine synthetase
Superfamily Superfamily superfamily	d.130.1 — S-adenosylmethionine synthetase
Family Family family	d.130.1.1 — S-adenosylmethionine synthetase

Domain ID domain_id	d1o9tb2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.130 — S-adenosylmethionine synthetase
Superfamily Superfamily superfamily	d.130.1 — S-adenosylmethionine synthetase
Family Family family	d.130.1.1 — S-adenosylmethionine synthetase

Domain ID domain_id	d1o9tb3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.130 — S-adenosylmethionine synthetase
Superfamily Superfamily superfamily	d.130.1 — S-adenosylmethionine synthetase
Family Family family	d.130.1.1 — S-adenosylmethionine synthetase

CATH v4.4 (6 domains)

Domain ID domain_id	1o9tA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	300 — GMP Synthetase; Chain A, domain 3
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1o9tA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	300 — GMP Synthetase; Chain A, domain 3
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1o9tA03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	300 — GMP Synthetase; Chain A, domain 3
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1o9tB01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	300 — GMP Synthetase; Chain A, domain 3
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1o9tB02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	300 — GMP Synthetase; Chain A, domain 3
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1o9tB03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	300 — GMP Synthetase; Chain A, domain 3
Homologous superfamily homologous superfamily	10 —

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Unit-cell length a length_a	114.990 Å
Unit-cell length b length_b	114.990 Å
Unit-cell length c length_c	160.340 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	16

Space group space_group	P 41 2 2
Space-group number int_tables_number	91
Crystal system crystal_system	—

Resolution resolution	2.900 Å
Low-resolution limit resolution_low	8.000 Å
R factor r_factor	0.2650
R_work r_work	0.2650
R_free r_free	0.2880

Methionine adenosyltransferase complexed with both substrates ATP and methionine

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

S-ADENOSYLMETHIONINE SYNTHETASE

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

1o9t__assembly_1__model_1

1o9t__assembly_1__model_1 | I(q)

1o9t__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (2)

Methionine adenosyltransferase complexed with both substrates ATP and methionine

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

S-ADENOSYLMETHIONINE SYNTHETASE

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

1o9t__assembly_1__model_1

1o9t__assembly_1__model_1 | I(q)

1o9t__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (2)