SAXSdb — 4hk4

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

Tyrosine--tRNA ligase

Methanocaldococcus jannaschii

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	DI(HYDROXYETHYL)ETHER × 4 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SYY_METJA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–306； UniProt 1–306

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	4hk4
Deposition date deposition_date	2012-10-15
Structure title title	Crystal structure of apo Tyrosine-tRNA ligase mutant protein
Keywords keywords	3-o-methyl tyrosine incorporation into peptide, tRNA, LIGASE; 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.

4hk4__assembly_1__model_1

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

Download this curve (.dat)

4hk4__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4hk4__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	33.68 Å
Rg (electron density)	33.79 Å
Total Rg	33.99 Å
Atom count	4950
Residues	618
Excluded volume	89263 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4hk4__assembly_1__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	Tyrosine--tRNA ligase
Molecular weight formula_weight	35637.3 kDa
EC 编号 ec_number	6.1.1.1
Mutation mutation	Y32E, L65S, H70G, Q109G, D158N, L162V
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2492

MDEFEMIKRNTSEIISEEELREVLKKDEKSAEIGFEPSGKIHLGHYLQIKKMIDLQNAGFDIIISLADLGAYLNQKGELDEIRKIGDYNKKVFEAMGLKAKYVYGSEFGLDKDYTLNVYRLALKTTLKRARRSMELIAREDENPKVAEVIYPIMQVNNIHYVGVDVAVGGMEQRKIHMLARELLPKKVVCIHNPVLTGLDGEGKMSSSKGNFIAVDDSPEEIRAKIKKAYCPAGVVEGNPIMEIAKYFLEYPLTIKRPEKFGGDLTVNSYEELESLFKNKELHPMDLKNAVAEELIKILEPIRKRLAHHHHH

Source Source

Source organism organism	Methanocaldococcus jannaschii
NCBI taxonomy ID ncbi_taxonomy_id	2190
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	DI(HYDROXYETHYL)ETHER
Molecular weight formula_weight	106.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	3

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d4hk4a1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.26 — Adenine nucleotide alpha hydrolase-like
Superfamily Superfamily superfamily	c.26.1 — Nucleotidylyl transferase
Family Family family	c.26.1.1 — Class I aminoacyl-tRNA synthetases (RS), catalytic domain

Domain ID domain_id	d4hk4a2
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

CATH v4.4 (2 domains)

Domain ID domain_id	4hk4A01
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	4hk4A02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	240 — Tyrosyl-Transfer RNA Synthetase
Homologous superfamily homologous superfamily	10 — Tyrosyl-Transfer RNA Synthetase

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Unit-cell length a length_a	52.695 Å
Unit-cell length b length_b	38.886 Å
Unit-cell length c length_c	83.061 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.98 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	2

Space group space_group	P 1 2 1
Space-group number int_tables_number	3
Crystal system crystal_system	—

Resolution resolution	2.298 Å
Low-resolution limit resolution_low	31.287 Å
R factor r_factor	0.2314
R_work r_work	0.2290
R_free r_free	0.2766

Crystal structure of apo Tyrosine-tRNA ligase mutant protein

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

Tyrosine--tRNA ligase

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

4hk4__assembly_1__model_1

4hk4__assembly_1__model_1 | I(q)

4hk4__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 (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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Crystal structure of apo Tyrosine-tRNA ligase mutant protein

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

Tyrosine--tRNA ligase

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

4hk4__assembly_1__model_1

4hk4__assembly_1__model_1 | I(q)

4hk4__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 (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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)