1a9x

CARBAMOYL PHOSPHATE SYNTHETASE: CAUGHT IN THE ACT OF GLUTAMINE HYDROLYSIS

Method: X-RAY DIFFRACTION

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

CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN)

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 8	CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN) × 4 （P00907） PHOSPHATE ION × 15 MANGANESE (II) ION × 12 POTASSIUM ION × 32 CHLORIDE ION × 28 ADENOSINE-5'-DIPHOSPHATE × 8 L-ornithine × 4 TETRAETHYLAMMONIUM ION × 4 water × 8	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN) × 1 （P00907） PHOSPHATE ION × 4 MANGANESE (II) ION × 3 POTASSIUM ION × 8 CHLORIDE ION × 7 ADENOSINE-5'-DIPHOSPHATE × 2 L-ornithine × 1 TETRAETHYLAMMONIUM ION × 1 water × 2	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 2	CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN) × 1 （P00907） PHOSPHATE ION × 4 MANGANESE (II) ION × 3 POTASSIUM ION × 8 CHLORIDE ION × 7 ADENOSINE-5'-DIPHOSPHATE × 2 L-ornithine × 1 TETRAETHYLAMMONIUM ION × 1 water × 2	Consistent with protein count
4	Protein heterocomplex	Heteromer	Protein 2	CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN) × 1 （P00907） PHOSPHATE ION × 4 MANGANESE (II) ION × 3 POTASSIUM ION × 8 CHLORIDE ION × 7 ADENOSINE-5'-DIPHOSPHATE × 2 L-ornithine × 1 TETRAETHYLAMMONIUM ION × 1 water × 2	Consistent with protein count
5	Protein heterocomplex	Heteromer	Protein 2	CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN) × 1 （P00907） PHOSPHATE ION × 3 MANGANESE (II) ION × 3 POTASSIUM ION × 8 CHLORIDE ION × 7 ADENOSINE-5'-DIPHOSPHATE × 2 L-ornithine × 1 TETRAETHYLAMMONIUM ION × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CARB_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–1073； UniProt 1–1072 Author chain C； PDBConstruct 2–1073； UniProt 1–1072 Author chain E； PDBConstruct 2–1073； UniProt 1–1072 Author chain G； PDBConstruct 2–1073； UniProt 1–1072

CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN)

Escherichia coli

UniProt P00907

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 8	CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN) × 4 （P00968） PHOSPHATE ION × 15 MANGANESE (II) ION × 12 POTASSIUM ION × 32 CHLORIDE ION × 28 ADENOSINE-5'-DIPHOSPHATE × 8 L-ornithine × 4 TETRAETHYLAMMONIUM ION × 4 water × 8	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN) × 1 （P00968） PHOSPHATE ION × 4 MANGANESE (II) ION × 3 POTASSIUM ION × 8 CHLORIDE ION × 7 ADENOSINE-5'-DIPHOSPHATE × 2 L-ornithine × 1 TETRAETHYLAMMONIUM ION × 1 water × 2	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 2	CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN) × 1 （P00968） PHOSPHATE ION × 4 MANGANESE (II) ION × 3 POTASSIUM ION × 8 CHLORIDE ION × 7 ADENOSINE-5'-DIPHOSPHATE × 2 L-ornithine × 1 TETRAETHYLAMMONIUM ION × 1 water × 2	Consistent with protein count
4	Protein heterocomplex	Heteromer	Protein 2	CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN) × 1 （P00968） PHOSPHATE ION × 4 MANGANESE (II) ION × 3 POTASSIUM ION × 8 CHLORIDE ION × 7 ADENOSINE-5'-DIPHOSPHATE × 2 L-ornithine × 1 TETRAETHYLAMMONIUM ION × 1 water × 2	Consistent with protein count
5	Protein heterocomplex	Heteromer	Protein 2	CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN) × 1 （P00968） PHOSPHATE ION × 3 MANGANESE (II) ION × 3 POTASSIUM ION × 8 CHLORIDE ION × 7 ADENOSINE-5'-DIPHOSPHATE × 2 L-ornithine × 1 TETRAETHYLAMMONIUM ION × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CARA_ECOLI
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–379； UniProt 2–380 Author chain D； PDBConstruct 1–379； UniProt 2–380 Author chain F； PDBConstruct 1–379； UniProt 2–380 Author chain H； PDBConstruct 1–379； UniProt 2–380

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	1a9x
Deposition date deposition_date	1998-04-14
Structure title title	CARBAMOYL PHOSPHATE SYNTHETASE: CAUGHT IN THE ACT OF GLUTAMINE HYDROLYSIS
Keywords keywords	AMIDOTRANSFERASE, THIOESTER; 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.

1a9x__assembly_4__model_1

Assembly 4 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1a9x__assembly_4__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1a9x__assembly_4__model_1 | P(r) · Pending

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

Rg（Guinier）	34.66 Å
Rg (electron density)	34.21 Å
Total Rg	34.57 Å
Atom count	11172
Residues	1436
Excluded volume	198990 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1a9x__assembly_1__model_1`	octameric （8）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1a9x__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1a9x__assembly_3__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1a9x__assembly_4__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`1a9x__assembly_5__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 (10)

Entity 1 Entity 1 polymer

Description description	CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN)
Molecular weight formula_weight	117956.7 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C,E,G
Atom count atom_count	49310

MPKRTDIKSILILGAGPIVIGQACEFDYSGAQACKALREEGYRVINVNSNPATIMTDPEMADATYIEPIHWEVVRKIIEKERPDAVLPTMGGQTALNCALELERQGVLEEFGVTMIGATADAIDKAEDRRRFDVAMKKIGLETARSGIAHTMEEALAVAADVGFPCIIRPSFTMGGSGGGIAYNREEFEEICARGLDLSPTKELLIDESLIGWKEYEMEVVRDKNDNCIIVCSIENFDAMGIHTGDSITVAPAQTLTDKEYQIMRNASMAVLREIGVETGGSNVQFAVNPKNGRLIVIEMNPRVSRSSALASKATGFPIAKVAAKLAVGYTLDELMNDITGGRTPASFEPSIDYVVTKIPRFNFEKFAGANDRLTTQMKSVGEVMAIGRTQQESLQKALRGLEVGATGFDPKVSLDDPEALTKIRRELKDAGADRIWYIADAFRAGLSVDGVFNLTNIDRWFLVQIEELVRLEEKVAEVGITGLNADFLRQLKRKGFADARLAKLAGVREAEIRKLRDQYDLHPVYKRVDTCAAEFATDTAYMYSTYEEECEANPSTDREKIMVLGGGPNRIGQGIEFDYCCVHASLALREDGYETIMVNCNPETVSTDYDTSDRLYFEPVTLEDVLEIVRIEKPKGVIVQYGGQTPLKLARALEAAGVPVIGTSPDAIDRAEDRERFQHAVERLKLKQPANATVTAIEMAVEKAKEIGYPLVVRASYVLGGRAMEIVYDEADLRRYFQTAVSVSNDAPVLLDHFLDDAVEVDVDAICDGEMVLIGGIMEHIEQAGVHSGDSACSLPAYTLSQEIQDVMRQQVQKLAFELQVRGLMNVQFAVKNNEVYLIEVNPRAARTVPFVSKATGVPLAKVAARVMAGKSLAEQGVTKEVIPPYYSVKEVVLPFNKFPGVDPLLGPEMRSTGEVMGVGRTFAEAFAKAQLGSNSTMKKHGRALLSVREGDKERVVDLAAKLLKQGFELDATHGTAIVLGEAGINPRLVNKVHEGRPHIQDRIKNGEYTYIINTTSGRRAIEDSRVIRRSALQYKVHYDTTLNGGFATAMALNADATEKVISVQEMHAQIK

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN)
Molecular weight formula_weight	41254.5 kDa
Mutation mutation	H353N
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,D,F,H

IKSALLVLEDGTQFHGRAIGATGSAVGEVVFNTSMTGYQEILTDPSYSRQIVTLTYPHIGNVGTNDADEESSQVHAQGLVIRDLPLIASNFRNTEDLSSYLKRHNIVAIADIDTRKLTRLLREKGAQNGCIIAGDNPDAALALEKARAFPGLNGMDLAKEVTTAEAYSWTQGSWTLTGGLPQAKKEDELPFHVVAYDFGAKRNILRMLVDRGCRLTIVPAQTSAEDVLKMNPDGIFLSNGPGDPAPCDYAITAIQKFLETDIPVFGICLGHQLLALASGAKTVKMKFGHHGGNHPVKDVEKNVVMITAQNHGFAVDEATLPANLRVTHKSLFDGTLQGIHRTDKPAFSFQGNPEASPGPHDAAPLFDHFIELIEQYRKT

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

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	15

Entity 4 Entity 4 non-polymer

Description description	MANGANESE (II) ION
Molecular weight formula_weight	54.9 kDa
Source method src_method	syn
Copy count entity_count	12

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	32

Entity 6 Entity 6 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	28

Entity 7 Entity 7 non-polymer

Description description	ADENOSINE-5'-DIPHOSPHATE
Molecular weight formula_weight	427.2 kDa
Source method src_method	syn
Copy count entity_count	8

Entity 8 Entity 8 non-polymer

Description description	L-ornithine
Molecular weight formula_weight	132.2 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 9 Entity 9 non-polymer

Description description	TETRAETHYLAMMONIUM ION
Molecular weight formula_weight	130.3 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 10 Entity 10 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	4528

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6. Fold Classification (SCOP + CATH) 72 domains

SCOP 2.08 (32 domains)

Domain ID domain_id	d1a9xa1
Class class	a — All alpha proteins
Fold Fold fold	a.92 — Carbamoyl phosphate synthetase, large subunit connection domain
Superfamily Superfamily superfamily	a.92.1 — Carbamoyl phosphate synthetase, large subunit connection domain
Family Family family	a.92.1.1 — Carbamoyl phosphate synthetase, large subunit connection domain

Domain ID domain_id	d1a9xa2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.24 — Methylglyoxal synthase-like
Superfamily Superfamily superfamily	c.24.1 — Methylglyoxal synthase-like
Family Family family	c.24.1.1 — Carbamoyl phosphate synthetase, large subunit allosteric, C-terminal domain

Domain ID domain_id	d1a9xa3
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.30 — PreATP-grasp domain
Superfamily Superfamily superfamily	c.30.1 — PreATP-grasp domain
Family Family family	c.30.1.1 — BC N-terminal domain-like

Domain ID domain_id	d1a9xa4
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.30 — PreATP-grasp domain
Superfamily Superfamily superfamily	c.30.1 — PreATP-grasp domain
Family Family family	c.30.1.1 — BC N-terminal domain-like

Domain ID domain_id	d1a9xa5
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.142 — ATP-grasp
Superfamily Superfamily superfamily	d.142.1 — Glutathione synthetase ATP-binding domain-like
Family Family family	d.142.1.2 — BC ATP-binding domain-like

Domain ID domain_id	d1a9xa6
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.142 — ATP-grasp
Superfamily Superfamily superfamily	d.142.1 — Glutathione synthetase ATP-binding domain-like
Family Family family	d.142.1.2 — BC ATP-binding domain-like

Domain ID domain_id	d1a9xb1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.3 — Carbamoyl phosphate synthetase, small subunit N-terminal domain
Family Family family	c.8.3.1 — Carbamoyl phosphate synthetase, small subunit N-terminal domain

Domain ID domain_id	d1a9xb2
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	d1a9xc1
Class class	a — All alpha proteins
Fold Fold fold	a.92 — Carbamoyl phosphate synthetase, large subunit connection domain
Superfamily Superfamily superfamily	a.92.1 — Carbamoyl phosphate synthetase, large subunit connection domain
Family Family family	a.92.1.1 — Carbamoyl phosphate synthetase, large subunit connection domain

Domain ID domain_id	d1a9xc2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.24 — Methylglyoxal synthase-like
Superfamily Superfamily superfamily	c.24.1 — Methylglyoxal synthase-like
Family Family family	c.24.1.1 — Carbamoyl phosphate synthetase, large subunit allosteric, C-terminal domain

Domain ID domain_id	d1a9xc3
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.30 — PreATP-grasp domain
Superfamily Superfamily superfamily	c.30.1 — PreATP-grasp domain
Family Family family	c.30.1.1 — BC N-terminal domain-like

Domain ID domain_id	d1a9xc4
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.30 — PreATP-grasp domain
Superfamily Superfamily superfamily	c.30.1 — PreATP-grasp domain
Family Family family	c.30.1.1 — BC N-terminal domain-like

Domain ID domain_id	d1a9xc5
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.142 — ATP-grasp
Superfamily Superfamily superfamily	d.142.1 — Glutathione synthetase ATP-binding domain-like
Family Family family	d.142.1.2 — BC ATP-binding domain-like

Domain ID domain_id	d1a9xc6
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.142 — ATP-grasp
Superfamily Superfamily superfamily	d.142.1 — Glutathione synthetase ATP-binding domain-like
Family Family family	d.142.1.2 — BC ATP-binding domain-like

Domain ID domain_id	d1a9xd1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.3 — Carbamoyl phosphate synthetase, small subunit N-terminal domain
Family Family family	c.8.3.1 — Carbamoyl phosphate synthetase, small subunit N-terminal domain

Domain ID domain_id	d1a9xd2
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	d1a9xe1
Class class	a — All alpha proteins
Fold Fold fold	a.92 — Carbamoyl phosphate synthetase, large subunit connection domain
Superfamily Superfamily superfamily	a.92.1 — Carbamoyl phosphate synthetase, large subunit connection domain
Family Family family	a.92.1.1 — Carbamoyl phosphate synthetase, large subunit connection domain

Domain ID domain_id	d1a9xe2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.24 — Methylglyoxal synthase-like
Superfamily Superfamily superfamily	c.24.1 — Methylglyoxal synthase-like
Family Family family	c.24.1.1 — Carbamoyl phosphate synthetase, large subunit allosteric, C-terminal domain

Domain ID domain_id	d1a9xe3
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.30 — PreATP-grasp domain
Superfamily Superfamily superfamily	c.30.1 — PreATP-grasp domain
Family Family family	c.30.1.1 — BC N-terminal domain-like

Domain ID domain_id	d1a9xe4
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.30 — PreATP-grasp domain
Superfamily Superfamily superfamily	c.30.1 — PreATP-grasp domain
Family Family family	c.30.1.1 — BC N-terminal domain-like

Domain ID domain_id	d1a9xe5
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.142 — ATP-grasp
Superfamily Superfamily superfamily	d.142.1 — Glutathione synthetase ATP-binding domain-like
Family Family family	d.142.1.2 — BC ATP-binding domain-like

Domain ID domain_id	d1a9xe6
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.142 — ATP-grasp
Superfamily Superfamily superfamily	d.142.1 — Glutathione synthetase ATP-binding domain-like
Family Family family	d.142.1.2 — BC ATP-binding domain-like

Domain ID domain_id	d1a9xf1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.3 — Carbamoyl phosphate synthetase, small subunit N-terminal domain
Family Family family	c.8.3.1 — Carbamoyl phosphate synthetase, small subunit N-terminal domain

Domain ID domain_id	d1a9xf2
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	d1a9xg1
Class class	a — All alpha proteins
Fold Fold fold	a.92 — Carbamoyl phosphate synthetase, large subunit connection domain
Superfamily Superfamily superfamily	a.92.1 — Carbamoyl phosphate synthetase, large subunit connection domain
Family Family family	a.92.1.1 — Carbamoyl phosphate synthetase, large subunit connection domain

Domain ID domain_id	d1a9xg2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.24 — Methylglyoxal synthase-like
Superfamily Superfamily superfamily	c.24.1 — Methylglyoxal synthase-like
Family Family family	c.24.1.1 — Carbamoyl phosphate synthetase, large subunit allosteric, C-terminal domain

Domain ID domain_id	d1a9xg3
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.30 — PreATP-grasp domain
Superfamily Superfamily superfamily	c.30.1 — PreATP-grasp domain
Family Family family	c.30.1.1 — BC N-terminal domain-like

Domain ID domain_id	d1a9xg4
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.30 — PreATP-grasp domain
Superfamily Superfamily superfamily	c.30.1 — PreATP-grasp domain
Family Family family	c.30.1.1 — BC N-terminal domain-like

Domain ID domain_id	d1a9xg5
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.142 — ATP-grasp
Superfamily Superfamily superfamily	d.142.1 — Glutathione synthetase ATP-binding domain-like
Family Family family	d.142.1.2 — BC ATP-binding domain-like

Domain ID domain_id	d1a9xg6
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.142 — ATP-grasp
Superfamily Superfamily superfamily	d.142.1 — Glutathione synthetase ATP-binding domain-like
Family Family family	d.142.1.2 — BC ATP-binding domain-like

Domain ID domain_id	d1a9xh1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.8 — The 'swivelling' beta/beta/alpha domain
Superfamily Superfamily superfamily	c.8.3 — Carbamoyl phosphate synthetase, small subunit N-terminal domain
Family Family family	c.8.3.1 — Carbamoyl phosphate synthetase, small subunit N-terminal domain

Domain ID domain_id	d1a9xh2
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)

CATH v4.4 (40 domains)

Domain ID domain_id	1a9xA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1a9xA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	470 — D-amino Acid Aminotransferase; Chain A, domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, B domain

Domain ID domain_id	1a9xA03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, A domain

Domain ID domain_id	1a9xA04
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1030 — Carbamoyl Phosphate Synthetase; Chain A, domain 4
Homologous superfamily homologous superfamily	10 — Carbamoyl-phosphate synthetase, large subunit oligomerisation domain

Domain ID domain_id	1a9xA05
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1a9xA06
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	470 — D-amino Acid Aminotransferase; Chain A, domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, B domain

Domain ID domain_id	1a9xA07
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, A domain

Domain ID domain_id	1a9xA08
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1380 — Methylglyoxal synthase-like domain

Domain ID domain_id	1a9xB01
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	30 — Glucose Oxidase; domain 1
Homologous superfamily homologous superfamily	20 — Carbamoyl-phosphate synthase small subunit, N-terminal domain

Domain ID domain_id	1a9xB02
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	1a9xC01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1a9xC02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	470 — D-amino Acid Aminotransferase; Chain A, domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, B domain

Domain ID domain_id	1a9xC03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, A domain

Domain ID domain_id	1a9xC04
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1030 — Carbamoyl Phosphate Synthetase; Chain A, domain 4
Homologous superfamily homologous superfamily	10 — Carbamoyl-phosphate synthetase, large subunit oligomerisation domain

Domain ID domain_id	1a9xC05
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1a9xC06
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	470 — D-amino Acid Aminotransferase; Chain A, domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, B domain

Domain ID domain_id	1a9xC07
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, A domain

Domain ID domain_id	1a9xC08
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1380 — Methylglyoxal synthase-like domain

Domain ID domain_id	1a9xD01
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	30 — Glucose Oxidase; domain 1
Homologous superfamily homologous superfamily	20 — Carbamoyl-phosphate synthase small subunit, N-terminal domain

Domain ID domain_id	1a9xD02
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	1a9xE01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1a9xE02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	470 — D-amino Acid Aminotransferase; Chain A, domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, B domain

Domain ID domain_id	1a9xE03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, A domain

Domain ID domain_id	1a9xE04
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1030 — Carbamoyl Phosphate Synthetase; Chain A, domain 4
Homologous superfamily homologous superfamily	10 — Carbamoyl-phosphate synthetase, large subunit oligomerisation domain

Domain ID domain_id	1a9xE05
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1a9xE06
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	470 — D-amino Acid Aminotransferase; Chain A, domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, B domain

Domain ID domain_id	1a9xE07
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, A domain

Domain ID domain_id	1a9xE08
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1380 — Methylglyoxal synthase-like domain

Domain ID domain_id	1a9xF01
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	30 — Glucose Oxidase; domain 1
Homologous superfamily homologous superfamily	20 — Carbamoyl-phosphate synthase small subunit, N-terminal domain

Domain ID domain_id	1a9xF02
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	1a9xG01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1a9xG02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	470 — D-amino Acid Aminotransferase; Chain A, domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, B domain

Domain ID domain_id	1a9xG03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, A domain

Domain ID domain_id	1a9xG04
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1030 — Carbamoyl Phosphate Synthetase; Chain A, domain 4
Homologous superfamily homologous superfamily	10 — Carbamoyl-phosphate synthetase, large subunit oligomerisation domain

Domain ID domain_id	1a9xG05
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1a9xG06
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	470 — D-amino Acid Aminotransferase; Chain A, domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, B domain

Domain ID domain_id	1a9xG07
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	20 — ATP-grasp fold, A domain

Domain ID domain_id	1a9xG08
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1380 — Methylglyoxal synthase-like domain

Domain ID domain_id	1a9xH01
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	30 — Glucose Oxidase; domain 1
Homologous superfamily homologous superfamily	20 — Carbamoyl-phosphate synthase small subunit, N-terminal domain

Domain ID domain_id	1a9xH02
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

▶

Unit-cell length a length_a	152.100 Å
Unit-cell length b length_b	164.400 Å
Unit-cell length c length_c	332.300 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 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.800 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

CARBAMOYL PHOSPHATE SYNTHETASE: CAUGHT IN THE ACT OF GLUTAMINE HYDROLYSIS

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

CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN)

State in the Current Structure

Other States of the Same Protein in the Database

CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN)

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

1a9x__assembly_4__model_1

1a9x__assembly_4__model_1 | I(q)

1a9x__assembly_4__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 (10)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

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 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 water

6. Fold Classification (SCOP + CATH) 72 domains

SCOP 2.08 (32 domains)

CATH v4.4 (40 domains)

7. Citations (1)

CARBAMOYL PHOSPHATE SYNTHETASE: CAUGHT IN THE ACT OF GLUTAMINE HYDROLYSIS

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

CARBAMOYL PHOSPHATE SYNTHETASE (LARGE CHAIN)

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

CARBAMOYL PHOSPHATE SYNTHETASE (SMALL CHAIN)

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

1a9x__assembly_4__model_1

1a9x__assembly_4__model_1 | I(q)

1a9x__assembly_4__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 (10)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

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 non-polymer

Entity 8 Entity 8 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 water

6. Fold Classification (SCOP + CATH) 72 domains

SCOP 2.08 (32 domains)

CATH v4.4 (40 domains)

7. Citations (1)