1gpm

ESCHERICHIA COLI GMP SYNTHETASE COMPLEXED WITH AMP AND PYROPHOSPHATE

Method: X-RAY DIFFRACTION

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

GMP SYNTHETASE

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	PHOSPHATE ION × 4 PYROPHOSPHATE 2- × 4 ADENOSINE MONOPHOSPHATE × 4 CITRIC ACID × 4 MAGNESIUM ION × 3 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	GUAA_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–525； UniProt 1–525 Author chain B； PDBConstruct 1–525； UniProt 1–525 Author chain C； PDBConstruct 1–525； UniProt 1–525 Author chain D； PDBConstruct 1–525； UniProt 1–525

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	1gpm
Deposition date deposition_date	1995-04-04
Structure title title	ESCHERICHIA COLI GMP SYNTHETASE COMPLEXED WITH AMP AND PYROPHOSPHATE
Keywords keywords	CLASS I GLUTAMINE AMIDOTRANSFERASE, N-TYPE ATP PYROPHOSPHATASE, TRANSFERASE (GLUTAMINE AMIDOTRANSFERASE); TRANSFERASE (GLUTAMINE AMIDOTRANSFERASE)
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.

1gpm__assembly_1__model_1

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

Download this curve (.dat)

1gpm__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1gpm__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	43.45 Å
Rg (electron density)	42.79 Å
Total Rg	43.21 Å
Atom count	16007
Residues	2000
Excluded volume	284330 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1gpm__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	GMP SYNTHETASE
Molecular weight formula_weight	58750.0 kDa
EC 编号 ec_number	6.3.5.2
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	16797

MTENIHKHRILILDFGSQYTQLVARRVRELGVYCELWAWDVTEAQIRDFNPSGIILSGGPESTTEENSPRAPQYVFEAGVPVFGVCYGMQTMAMQLGGHVEASNEREFGYAQVEVVNDSALVRGIEDALTADGKPLLDVWMSHGDKVTAIPSDFITVASTESCPFAIMANEEKRFYGVQFHPEVTHTRQGMRMLERFVRDICQCEALWTPAKIIDDAVARIREQVGDDKVILGLSGGVDSSVTAMLLHRAIGKNLTCVFVDNGLLRLNEAEQVLDMFGDHFGLNIVHVPAEDRFLSALAGENDPEAKRKIIGRVFVEVFDEEALKLEDVKWLAQGTIYPDVIESAASATGKAHVIKSHHNVGGLPKEMKMGLVEPLKELFKDEVRKIGLELGLPYDMLYRHPFPGPGLGVRVLGEVKKEYCDLLRRADAIFIEELRKADLYDKVSQAFTVFLPVRSVGVMGDGRKYDWVVSLRAVETIDFMTAHWAHLPYDFLGRVSNRIINEVNGISRVVYDISGKPPATIEWE

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	83333
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	PYROPHOSPHATE 2-
Molecular weight formula_weight	176.0 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 non-polymer

Description description	ADENOSINE MONOPHOSPHATE
Molecular weight formula_weight	347.2 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 5 Entity 5 non-polymer

Description description	CITRIC ACID
Molecular weight formula_weight	192.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 6 Entity 6 non-polymer

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

Entity 7 Entity 7 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	790

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6. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (12 domains)

Domain ID domain_id	d1gpma1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.26 — Adenine nucleotide alpha hydrolase-like
Superfamily Superfamily superfamily	c.26.2 — Adenine nucleotide alpha hydrolases-like
Family Family family	c.26.2.1 — N-type ATP pyrophosphatases

Domain ID domain_id	d1gpma2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.16 — Class I glutamine amidotransferase-like
Family Family family	c.23.16.1 — Class I glutamine amidotransferases (GAT)

Domain ID domain_id	d1gpma3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.52 — Alpha-lytic protease prodomain-like
Superfamily Superfamily superfamily	d.52.2 — GMP synthetase C-terminal dimerisation domain
Family Family family	d.52.2.1 — GMP synthetase C-terminal dimerisation domain

Domain ID domain_id	d1gpmb1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.26 — Adenine nucleotide alpha hydrolase-like
Superfamily Superfamily superfamily	c.26.2 — Adenine nucleotide alpha hydrolases-like
Family Family family	c.26.2.1 — N-type ATP pyrophosphatases

Domain ID domain_id	d1gpmb2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.16 — Class I glutamine amidotransferase-like
Family Family family	c.23.16.1 — Class I glutamine amidotransferases (GAT)

Domain ID domain_id	d1gpmb3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.52 — Alpha-lytic protease prodomain-like
Superfamily Superfamily superfamily	d.52.2 — GMP synthetase C-terminal dimerisation domain
Family Family family	d.52.2.1 — GMP synthetase C-terminal dimerisation domain

Domain ID domain_id	d1gpmc1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.26 — Adenine nucleotide alpha hydrolase-like
Superfamily Superfamily superfamily	c.26.2 — Adenine nucleotide alpha hydrolases-like
Family Family family	c.26.2.1 — N-type ATP pyrophosphatases

Domain ID domain_id	d1gpmc2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.16 — Class I glutamine amidotransferase-like
Family Family family	c.23.16.1 — Class I glutamine amidotransferases (GAT)

Domain ID domain_id	d1gpmc3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.52 — Alpha-lytic protease prodomain-like
Superfamily Superfamily superfamily	d.52.2 — GMP synthetase C-terminal dimerisation domain
Family Family family	d.52.2.1 — GMP synthetase C-terminal dimerisation domain

Domain ID domain_id	d1gpmd1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.26 — Adenine nucleotide alpha hydrolase-like
Superfamily Superfamily superfamily	c.26.2 — Adenine nucleotide alpha hydrolases-like
Family Family family	c.26.2.1 — N-type ATP pyrophosphatases

Domain ID domain_id	d1gpmd2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.16 — Class I glutamine amidotransferase-like
Family Family family	c.23.16.1 — Class I glutamine amidotransferases (GAT)

Domain ID domain_id	d1gpmd3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.52 — Alpha-lytic protease prodomain-like
Superfamily Superfamily superfamily	d.52.2 — GMP synthetase C-terminal dimerisation domain
Family Family family	d.52.2.1 — GMP synthetase C-terminal dimerisation domain

CATH v4.4 (12 domains)

Domain ID domain_id	1gpmA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	880 — Class I glutamine amidotransferase (GATase) domain

Domain ID domain_id	1gpmA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	620 — HUPs

Domain ID domain_id	1gpmA03
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	1gpmB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	880 — Class I glutamine amidotransferase (GATase) domain

Domain ID domain_id	1gpmB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	620 — HUPs

Domain ID domain_id	1gpmB03
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	1gpmC01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	880 — Class I glutamine amidotransferase (GATase) domain

Domain ID domain_id	1gpmC02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	620 — HUPs

Domain ID domain_id	1gpmC03
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	1gpmD01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	880 — Class I glutamine amidotransferase (GATase) domain

Domain ID domain_id	1gpmD02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	620 — HUPs

Domain ID domain_id	1gpmD03
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	156.000 Å
Unit-cell length b length_b	102.000 Å
Unit-cell length c length_c	78.800 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	96.70 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	6.000 Å
R factor r_factor	0.1740
R_work r_work	0.1740
R_free r_free	—

ESCHERICHIA COLI GMP SYNTHETASE COMPLEXED WITH AMP AND PYROPHOSPHATE

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

GMP 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

1gpm__assembly_1__model_1

1gpm__assembly_1__model_1 | I(q)

1gpm__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 24 domains

SCOP 2.08 (12 domains)

CATH v4.4 (12 domains)

7. Citations (2)

ESCHERICHIA COLI GMP SYNTHETASE COMPLEXED WITH AMP AND PYROPHOSPHATE

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

GMP 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

1gpm__assembly_1__model_1

1gpm__assembly_1__model_1 | I(q)

1gpm__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 24 domains

SCOP 2.08 (12 domains)

CATH v4.4 (12 domains)

7. Citations (2)