3kt8

Crystal structure of S. cerevisiae tryptophanyl-tRNA synthetase in complex with L-tryptophanamide

Method: X-RAY DIFFRACTION

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

Tryptophanyl-tRNA synthetase, cytoplasmic

Saccharomyces cerevisiae

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	L-TRYPTOPHANAMIDE × 2 SULFATE ION × 6 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	L-TRYPTOPHANAMIDE × 2 SULFATE ION × 4 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SYWC_YEAST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–432； UniProt 1–432 Author chain B； PDBConstruct 1–432； UniProt 1–432 Author chain C； PDBConstruct 1–432； UniProt 1–432 Author chain D； PDBConstruct 1–432； UniProt 1–432

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	3kt8
Deposition date deposition_date	2009-11-24
Structure title title	Crystal structure of S. cerevisiae tryptophanyl-tRNA synthetase in complex with L-tryptophanamide
Keywords keywords	;tryptophanyl-tRNA synthetase, S. cerevisiae, sulfate ion, amino acid activation, catalytic mechanism, tryptophanamide, Aminoacyl-tRNA synthetase, ATP-binding, Cytoplasm, Ligase, Nucleotide-binding, Protein biosynthesis ;; 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.

3kt8__assembly_1__model_1

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

Download this curve (.dat)

3kt8__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3kt8__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	33.56 Å
Rg (electron density)	33.12 Å
Total Rg	33.66 Å
Atom count	6597
Residues	811
Excluded volume	117780 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3kt8__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3kt8__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 (4)

Entity 1 Entity 1 polymer

Description description	Tryptophanyl-tRNA synthetase, cytoplasmic
Molecular weight formula_weight	50248.1 kDa
EC 编号 ec_number	6.1.1.2
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	13222

MSNDETVEKVTQQVSELKSTDVKEQVVTPWDVEGGVDEQGRAQNIDYDKLIKQFGTKPVNEETLKRFKQVTGREPHHFLRKGLFFSERDFTKILDLYEQGKPFFLYTGRGPSSDSMHLGHMIPFVFTKWLQEVFDVPLVIELTDDEKFLFKHKLTINDVKNFARENAKDIIAVGFDPKNTFIFSDLQYMGGAFYETVVRVSRQITGSTAKAVFGFNDSDCIGKFHFASIQIATAFPSSFPNVLGLPDKTPCLIPCAIDQDPYFRVCRDVADKLKYSKPALLHSRFFPALQGSTTKMSASDDTTAIFMTDTPKQIQKKINKYAFSGGQVSADLHRELGGNPDVDVAYQYLSFFKDDDVFLKECYDKYKSGELLSGEMKKLCIETLQEFVKAFQERRAQVDEETLDKFMVPHKLVWGEKERLVAPKPKTKQEKKHHHHHH

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;Baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	L-TRYPTOPHANAMIDE
Molecular weight formula_weight	203.2 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	10

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	21

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d3kt8a_
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	d3kt8b_
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	d3kt8c_
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	d3kt8d_
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

CATH v4.4 (8 domains)

Domain ID domain_id	3kt8A01
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	3kt8A02
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

Domain ID domain_id	3kt8B01
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	3kt8B02
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

Domain ID domain_id	3kt8C01
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	3kt8C02
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

Domain ID domain_id	3kt8D01
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	3kt8D02
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	252.260 Å
Unit-cell length b length_b	252.260 Å
Unit-cell length c length_c	111.376 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	24

Space group space_group	P 61
Space-group number int_tables_number	169
Crystal system crystal_system	—

Resolution resolution	3.000 Å
Low-resolution limit resolution_low	49.040 Å
R factor r_factor	0.2481
R_work r_work	0.2468
R_free r_free	0.2731

Crystal structure of S. cerevisiae tryptophanyl-tRNA synthetase in complex with L-tryptophanamide

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

Tryptophanyl-tRNA synthetase, cytoplasmic

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

3kt8__assembly_1__model_1

3kt8__assembly_1__model_1 | I(q)

3kt8__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Crystal structure of S. cerevisiae tryptophanyl-tRNA synthetase in complex with L-tryptophanamide

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

Tryptophanyl-tRNA synthetase, cytoplasmic

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

3kt8__assembly_1__model_1

3kt8__assembly_1__model_1 | I(q)

3kt8__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

CATH v4.4 (8 domains)

7. Citations (1)