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Human seryl-tRNA synthetase dimer complexed with two molecules of trnasec

Analyse Human seryl-tRNA synthetase dimer complexed with two molecules of trnasec in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
4RQE
Type
protein + RNA
Length
1,079 residues
Chains
4
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Serine--tRNA ligase, cytoplasmic; Selenocysteine tRNA
EC
6.1.1.11
UniProt
P49591
Ligands
SER, ANP
Pockets
20 · best druggability 0.75

Structure

x-ray diffraction · 4 distinct chains · 40% helix, 19% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
ASerine--tRNA ligase, cytoplasmic (EC 6.1.1.11)protein46040% helix, 19% strandP49591
CSerine--tRNA ligase, cytoplasmic (EC 6.1.1.11)protein45240% helix, 19% strandP49591
BSelenocysteine tRNArna84——
DSelenocysteine tRNArna83——

Ligands and binding sites

  • SER · Serine · ligand · 2 copies · chains A, C
  • ANP · Phosphoaminophosphonic acid-adenylate ester · ligand · 2 copies · chains A, C

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 11 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
16290.750.8269SER, ANP
26220.750.8261SER, ANP
3670.750.9918empty
410500.730.7771empty
56910.710.7953empty

Interfaces

4 interfaces between chains.

  • A–C · 3002 Ų buried · 46 hydrogen bonds · protein-protein
  • A–B · 495 Ų buried · 3 hydrogen bonds · protein-nucleic
  • C–D · 465 Ų buried · 4 hydrogen bonds · protein-nucleic
  • A–D · 16 Ų buried · 0 hydrogen bonds · protein-nucleic

Modifications

Observed in the structure: 2 disulfide (disulfide).

Compared structures

  • 4RQE · human Seryl-tRNA synthetase dimer complexed with two molecules of tRNAsec · the same entry in another collection · chain C against C, TM-score 1.00
  • P49591 · AlphaFold monomer V2.0 prediction for serine--tRNA ligase, cytoplasmic (P49591) · a predicted model of the same protein · chain C against A, TM-score 0.98

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