1xi9

Alanine aminotransferase from Pyrococcus furiosus Pfu-1397077-001

Method: X-RAY DIFFRACTION

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

putative transaminase

Pyrococcus furiosus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	PYRIDOXAL-5'-PHOSPHATE × 4 water × 4	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	PYRIDOXAL-5'-PHOSPHATE × 2 water × 2	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 2	PYRIDOXAL-5'-PHOSPHATE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9P9M8_PYRFU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 10–406； UniProt 2–398 Author chain B； PDBConstruct 10–406； UniProt 2–398 Author chain C； PDBConstruct 10–406； UniProt 2–398 Author chain D； PDBConstruct 10–406； UniProt 2–398

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	1xi9
Deposition date deposition_date	2004-09-21
Structure title title	Alanine aminotransferase from Pyrococcus furiosus Pfu-1397077-001
Keywords keywords	;Alanine aminotransferase, Pyrococcus furiosus, Southeast Collaboratory for Structural Genomics, SECSG, hyperthermophile, protein structure initiative, PSI, 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.

1xi9__assembly_3__model_1

Assembly 3 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1xi9__assembly_3__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1xi9__assembly_3__model_1 | P(r) · Pending

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

Rg（Guinier）	28.43 Å
Rg (electron density)	27.49 Å
Total Rg	28.26 Å
Atom count	6115
Residues	779
Excluded volume	109250 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1xi9__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1xi9__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1xi9__assembly_3__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 (3)

Entity 1 Entity 1 polymer

Description description	putative transaminase
Molecular weight formula_weight	46311.0 kDa
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	12327

AHHHHHHGSIRASKRALSVEYAIRDVVLPARELEKKGIKVIRLNIGDPVKFDFQPPEHMKEAYCKAIKEGHNYYGDSEGLPELRKAIVEREKRKNGVDITPDDVRVTAAVTEALQLIFGALLDPGDEILVPGPSYPPYTGLVKFYGGKPVEYRTIEEEDWQPDIDDIRKKITDRTKAIAVINPNNPTGALYDKKTLEEILNIAGEYEIPVISDEIYDLMTYEGEHISPGSLTKDVPVIVMNGLSKVYFATGWRLGYMYFVDPENKLSEVREAIDRLARIRLCPNTPAQFAAIAGLTGPMDYLKEYMKKLKERRDYIYKRLNEIPGISTTKPQGAFYIFPKIEVGPWKNDKEFVLDVLHNAHVLFVHGSGFGEYGAGHFRAVFLPPIEILEEAMDRFEKFMKERLKE

Source Source

Source organism organism	Pyrococcus furiosus
NCBI taxonomy ID ncbi_taxonomy_id	186497
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	PYRIDOXAL-5'-PHOSPHATE
Molecular weight formula_weight	247.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	105

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6. Fold Classification (SCOP + CATH) 13 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d1xi9a1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.67 — PLP-dependent transferase-like
Superfamily Superfamily superfamily	c.67.1 — PLP-dependent transferases
Family Family family	c.67.1.1 — AAT-like

Domain ID domain_id	d1xi9a2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d1xi9b_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.67 — PLP-dependent transferase-like
Superfamily Superfamily superfamily	c.67.1 — PLP-dependent transferases
Family Family family	c.67.1.1 — AAT-like

Domain ID domain_id	d1xi9c_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.67 — PLP-dependent transferase-like
Superfamily Superfamily superfamily	c.67.1 — PLP-dependent transferases
Family Family family	c.67.1.1 — AAT-like

Domain ID domain_id	d1xi9d_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.67 — PLP-dependent transferase-like
Superfamily Superfamily superfamily	c.67.1 — PLP-dependent transferases
Family Family family	c.67.1.1 — AAT-like

CATH v4.4 (8 domains)

Domain ID domain_id	1xi9A01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1150 — Aspartate Aminotransferase, domain 1
Homologous superfamily homologous superfamily	10 — Aspartate Aminotransferase, domain 1

Domain ID domain_id	1xi9A02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	640 — Aspartate Aminotransferase; domain 2
Homologous superfamily homologous superfamily	10 — Type I PLP-dependent aspartate aminotransferase-like (Major domain)

Domain ID domain_id	1xi9B01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1150 — Aspartate Aminotransferase, domain 1
Homologous superfamily homologous superfamily	10 — Aspartate Aminotransferase, domain 1

Domain ID domain_id	1xi9B02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	640 — Aspartate Aminotransferase; domain 2
Homologous superfamily homologous superfamily	10 — Type I PLP-dependent aspartate aminotransferase-like (Major domain)

Domain ID domain_id	1xi9C01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1150 — Aspartate Aminotransferase, domain 1
Homologous superfamily homologous superfamily	10 — Aspartate Aminotransferase, domain 1

Domain ID domain_id	1xi9C02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	640 — Aspartate Aminotransferase; domain 2
Homologous superfamily homologous superfamily	10 — Type I PLP-dependent aspartate aminotransferase-like (Major domain)

Domain ID domain_id	1xi9D01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1150 — Aspartate Aminotransferase, domain 1
Homologous superfamily homologous superfamily	10 — Aspartate Aminotransferase, domain 1

Domain ID domain_id	1xi9D02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	640 — Aspartate Aminotransferase; domain 2
Homologous superfamily homologous superfamily	10 — Type I PLP-dependent aspartate aminotransferase-like (Major domain)

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Unit-cell length a length_a	61.804 Å
Unit-cell length b length_b	188.089 Å
Unit-cell length c length_c	72.583 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	89.79 °
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	2.330 Å
Low-resolution limit resolution_low	42.260 Å
R factor r_factor	0.2034
R_work r_work	0.2020
R_free r_free	0.2450

Alanine aminotransferase from Pyrococcus furiosus Pfu-1397077-001

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

putative transaminase

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

1xi9__assembly_3__model_1

1xi9__assembly_3__model_1 | I(q)

1xi9__assembly_3__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 13 domains

SCOP 2.08 (5 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Alanine aminotransferase from Pyrococcus furiosus Pfu-1397077-001

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

putative transaminase

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

1xi9__assembly_3__model_1

1xi9__assembly_3__model_1 | I(q)

1xi9__assembly_3__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 13 domains

SCOP 2.08 (5 domains)

CATH v4.4 (8 domains)

7. Citations (1)