SAXSdb — 1ser

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

PROTEIN (SERYL-TRNA SYNTHETASE (E.C.6.1.1.11))

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Homooligomer	Protein 2 RNA 1	TRNASER × 1 water × 3	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SYS_THETH
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain A； PDBConstruct 1–421； UniProt 1–421 Author chain B； PDBConstruct 1–421； UniProt 1–421

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	1ser
Deposition date deposition_date	1994-02-21
Structure title title	THE 2.9 ANGSTROMS CRYSTAL STRUCTURE OF T. THERMOPHILUS SERYL-TRNA SYNTHETASE COMPLEXED WITH TRNA SER
Keywords keywords	PROTEIN-T-RNA COMPLEX, LIGASE-RNA COMPLEX; LIGASE/RNA
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.

1ser__assembly_1__model_1

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

Download this curve (.dat)

1ser__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ser__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	33.17 Å
Rg (electron density)	32.28 Å
Total Rg	32.89 Å
Atom count	7736
Residues	855
Excluded volume	132670 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ser__assembly_1__model_1`	trimeric （3）	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	TRNASER
Molecular weight formula_weight	30387.1 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	T
Atom count atom_count	7780

GGAGAGGUGCCCGAGUGGCUGAAGGGACACGACUGGAAAUCGUGUAGGGGGGCUUAAACCUCCCUCGCGGGUUCGAAUCCCGCCCUCUCCGCCA

Entity 2 Entity 2 polymer

Description description	PROTEIN (SERYL-TRNA SYNTHETASE (E.C.6.1.1.11))
Molecular weight formula_weight	47878.8 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B

MVDLKRLRQEPEVFHRAIREKGVALDLEALLALDREVQELKKRLQEVQTERNQVAKRVPKAPPEEKEALIARGKALGEEAKRLEEALREKEARLEALLLQVPLPPWPGAPVGGEEANREIKRVGGPPEFSFPPLDHVALMEKNGWWEPRISQVSGSRSYALKGDLALYELALLRFAMDFMARRGFLPMTLPSYAREKAFLGTGHFPAYRDQVWAIAETDLYLTGTAEVVLNALHSGEILPYEALPLRYAGYAPAFRSEAGSFGKDVRGLMRVHQFHKVEQYVLTEASLEASDRAFQELLENAEEILRLLELPYRLVEVATGDMGPGKWRQVDIEVYLPSEGRYRETHSCSALLDWQARRANLRYRDPEGRVRYAYTLNNTALATPRILAMLLENHQLQDGRVRVPQALIPYMGKEVLEPCG

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	44

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1sera1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.7 — tRNA-binding arm
Family Family family	a.2.7.1 — Seryl-tRNA synthetase (SerRS)

Domain ID domain_id	d1sera2
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	d1serb1
Class class	a — All alpha proteins
Fold Fold fold	a.2 — Long alpha-hairpin
Superfamily Superfamily superfamily	a.2.7 — tRNA-binding arm
Family Family family	a.2.7.1 — Seryl-tRNA synthetase (SerRS)

Domain ID domain_id	d1serb2
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 (4 domains)

Domain ID domain_id	1serA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	40 — Serine-tRNA synthetase, tRNA binding domain

Domain ID domain_id	1serA02
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	1serB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	40 — Serine-tRNA synthetase, tRNA binding domain

Domain ID domain_id	1serB02
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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7. Citations (9)

The 2.9 A crystal structure of T. thermophilus seryl-tRNA synthetase complexed with tRNA(Ser).

Science (1994)

PMID: 8128220 PRIMARY

Crystal Structures at 2.5 Angstroms Resolution of Seryl-tRNA Synthetase Complexed with Two Different Analogues of Seryl-Adenylate

Science (1994)

Refined Crystal Structure of the Seryl-tRNA Synthetase from Thermus Thermophilus at 2.5 Angstroms Resolution

J.Mol.Biol. (1993)

Crystallization of the Seryl-tRNA Synthetase: TRNA(Ser) Complex of Escherichia Coli

FEBS Lett. (1993)

;A New Crystal Form of the Complex between Seryl-tRNA Synthetase and tRNA(Ser) from Thermus Thermophilus that Diffracts to 2.8 Angstroms Resolution ;

FEBS Lett. (1992)

Crystallization of the Seryl-tRNA Synthetase-tRNA(Ser) Complex from Thermus Thermophilus

J.Mol.Biol. (1992)

Sequence, Structural and Evolutionary Relationships between Class 2 Aminoacyl- tRNA Synthetases

Nucleic Acids Res. (1991)

Seryl-tRNA Synthetase from Escherichia Coli at 2.5 Angstroms Resolution: A Second Class of Synthetase Structure

Nature (1990)

Crystals of Seryl-tRNA Synthetase from Thermus Thermophilus. Preliminary Crystallographic Data.

J.Mol.Biol. (1990)

Unit-cell length a length_a	124.500 Å
Unit-cell length b length_b	128.900 Å
Unit-cell length c length_c	121.200 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	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.900 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	0.1940
R_work r_work	0.1940
R_free r_free	—

THE 2.9 ANGSTROMS CRYSTAL STRUCTURE OF T. THERMOPHILUS SERYL-TRNA SYNTHETASE COMPLEXED WITH TRNA SER

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

PROTEIN (SERYL-TRNA SYNTHETASE (E.C.6.1.1.11))

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

1ser__assembly_1__model_1

1ser__assembly_1__model_1 | I(q)

1ser__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (9)

THE 2.9 ANGSTROMS CRYSTAL STRUCTURE OF T. THERMOPHILUS SERYL-TRNA SYNTHETASE COMPLEXED WITH TRNA SER

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

PROTEIN (SERYL-TRNA SYNTHETASE (E.C.6.1.1.11))

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

1ser__assembly_1__model_1

1ser__assembly_1__model_1 | I(q)

1ser__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (9)