3a74

Lysyl-tRNA synthetase from Bacillus stearothermophilus complexed with Diadenosine Tetraphosphate (AP4A)

Method: X-RAY DIFFRACTION

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

Lysyl-tRNA synthetase

Geobacillus stearothermophilus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	BIS(ADENOSINE)-5'-TETRAPHOSPHATE × 2 2,6-DIAMINO-HEXANOIC ACID AMIDE × 2 MAGNESIUM ION × 6 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	BIS(ADENOSINE)-5'-TETRAPHOSPHATE × 2 2,6-DIAMINO-HEXANOIC ACID AMIDE × 2 MAGNESIUM ION × 6 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SYK_BACST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–493； UniProt 2–494 Author chain B； PDBConstruct 1–493； UniProt 2–494 Author chain C； PDBConstruct 1–493； UniProt 2–494 Author chain D； PDBConstruct 1–493； UniProt 2–494

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	3a74
Deposition date deposition_date	2009-09-13
Structure title title	Lysyl-tRNA synthetase from Bacillus stearothermophilus complexed with Diadenosine Tetraphosphate (AP4A)
Keywords keywords	;aminoacyl tRNA synthetase, LIGASE, PROTEIN BIOSYNTHESIS, Aminoacyl-tRNA synthetase, ATP-binding, Magnesium, Metal-binding, Nucleotide-binding ;; LIGASE
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.

3a74__assembly_1__model_1

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

Download this curve (.dat)

3a74__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3a74__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	32.26 Å
Rg (electron density)	31.70 Å
Total Rg	32.19 Å
Atom count	8044
Residues	968
Excluded volume	142560 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3a74__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3a74__assembly_2__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 (5)

Entity 1 Entity 1 polymer

Description description	Lysyl-tRNA synthetase
Molecular weight formula_weight	57359.3 kDa
EC 编号 ec_number	6.1.1.6
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	16936

SHEELNDQLRVRREKLKKIEELGVDPFGKRFERTHKAEELFELYGDLSKEELEEQQIEVAVAGRIMTKRGMGKAGFAHIQDVTGQIQIYVRQDDVGEQQYELFKISDLGDIVGVRGTMFKTKVGELSIKVSSYEFLTKALRPLPEKYHGLKDIEQRYRQRYLDLIMNPESKKTFITRSLIIQSMRRYLDSHGYLEVETPMMHAVAGGAAARPFITHHNALDMTLYMRIAIELHLKRLIVGGLEKVYEIGRVFRNEGISTRHNPEFTMLELYEAYADFRDIMKLTENLIAHIATEVLGTTKIQYGEHLVDLTPEWRRLHMVDAIKEYVGVDFWRQMSDEEARELAKEHGVEVAPHMTFGHIVNEFFEQKVEDKLIQPTFIYGHPVEISPLAKKNPDDPRFTDRFELFIVGREHANAFTELNDPIDQRQRFEEQLKEREQGNDEAHEMDEDFLEALEYGMPPTGGLGIGVDRLVMLLTNSPSIRDVLLFPQMRHK

Source Source

Source organism organism	Geobacillus stearothermophilus
NCBI taxonomy ID ncbi_taxonomy_id	1422
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	BIS(ADENOSINE)-5'-TETRAPHOSPHATE
Molecular weight formula_weight	836.4 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	2,6-DIAMINO-HEXANOIC ACID AMIDE
Molecular weight formula_weight	146.2 kDa
Source method src_method	syn
Copy count entity_count	4

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	12

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	812

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6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d3a74a1
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.1 — Anticodon-binding domain

Domain ID domain_id	d3a74a2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.104 — Class II aaRS and biotin synthetases
Superfamily Superfamily superfamily	d.104.1 — Class II aaRS and biotin synthetases
Family Family family	d.104.1.1 — Class II aminoacyl-tRNA synthetase (aaRS)-like, catalytic domain

Domain ID domain_id	d3a74b1
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.1 — Anticodon-binding domain

Domain ID domain_id	d3a74b2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.104 — Class II aaRS and biotin synthetases
Superfamily Superfamily superfamily	d.104.1 — Class II aaRS and biotin synthetases
Family Family family	d.104.1.1 — Class II aminoacyl-tRNA synthetase (aaRS)-like, catalytic domain

Domain ID domain_id	d3a74c1
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.1 — Anticodon-binding domain

Domain ID domain_id	d3a74c2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.104 — Class II aaRS and biotin synthetases
Superfamily Superfamily superfamily	d.104.1 — Class II aaRS and biotin synthetases
Family Family family	d.104.1.1 — Class II aminoacyl-tRNA synthetase (aaRS)-like, catalytic domain

Domain ID domain_id	d3a74d1
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.4 — Nucleic acid-binding proteins
Family Family family	b.40.4.1 — Anticodon-binding domain

Domain ID domain_id	d3a74d2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.104 — Class II aaRS and biotin synthetases
Superfamily Superfamily superfamily	d.104.1 — Class II aaRS and biotin synthetases
Family Family family	d.104.1.1 — Class II aminoacyl-tRNA synthetase (aaRS)-like, catalytic domain

CATH v4.4 (8 domains)

Domain ID domain_id	3a74A01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

Domain ID domain_id	3a74A02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	930 — BirA Bifunctional Protein; domain 2
Homologous superfamily homologous superfamily	10 — Bira Bifunctional Protein; Domain 2

Domain ID domain_id	3a74B01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

Domain ID domain_id	3a74B02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	930 — BirA Bifunctional Protein; domain 2
Homologous superfamily homologous superfamily	10 — Bira Bifunctional Protein; Domain 2

Domain ID domain_id	3a74C01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

Domain ID domain_id	3a74C02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	930 — BirA Bifunctional Protein; domain 2
Homologous superfamily homologous superfamily	10 — Bira Bifunctional Protein; Domain 2

Domain ID domain_id	3a74D01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

Domain ID domain_id	3a74D02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	930 — BirA Bifunctional Protein; domain 2
Homologous superfamily homologous superfamily	10 — Bira Bifunctional Protein; Domain 2

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Unit-cell length a length_a	80.176 Å
Unit-cell length b length_b	85.080 Å
Unit-cell length c length_c	151.764 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.01 °
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	1.800 Å
Low-resolution limit resolution_low	14.960 Å
R factor r_factor	0.2070
R_work r_work	0.2070
R_free r_free	0.2280

Lysyl-tRNA synthetase from Bacillus stearothermophilus complexed with Diadenosine Tetraphosphate (AP4A)

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

Lysyl-tRNA 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

3a74__assembly_1__model_1

3a74__assembly_1__model_1 | I(q)

3a74__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 (5)

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 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Lysyl-tRNA synthetase from Bacillus stearothermophilus complexed with Diadenosine Tetraphosphate (AP4A)

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

Lysyl-tRNA 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

3a74__assembly_1__model_1

3a74__assembly_1__model_1 | I(q)

3a74__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 (5)

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 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)