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Crystal structure of O-acetylserine sulfhydrylase B

Analyse Crystal structure of O-acetylserine sulfhydrylase B in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
2BHT
Type
protein
Length
1,152 residues
Chains
4
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Cysteine synthase B
EC
2.5.1.47
UniProt
P16703
Ligands
PLP
Pockets
19 · best druggability 0.82

Structure

x-ray diffraction · 4 distinct chains · 39% helix, 17% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
ACysteine synthase B (EC 2.5.1.47)protein29443% helix, 17% strandP16703
BCysteine synthase B (EC 2.5.1.47)protein28136% helix, 16% strandP16703
CCysteine synthase B (EC 2.5.1.47)protein29240% helix, 19% strandP16703
DCysteine synthase B (EC 2.5.1.47)protein28538% helix, 15% strandP16703

Ligands and binding sites

  • PLP · Pyridoxal-5'-phosphate · ligand · 4 copies · chains A, B, C, D

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

Pockets

19 pockets found on a 1 Å grid, 9 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
17900.820.8585PLP
28600.770.8176PLP
36580.750.8173empty
4940.750.9733PLP
5690.720.9827PLP

Interfaces

5 interfaces between chains.

  • C–D · 1633 Ų buried · 17 hydrogen bonds · protein-protein
  • A–B · 1563 Ų buried · 15 hydrogen bonds · protein-protein
  • B–C · 605 Ų buried · 13 hydrogen bonds · protein-protein
  • A–D · 439 Ų buried · 8 hydrogen bonds · protein-protein
  • A–C · 39 Ų buried · 1 hydrogen bond · protein-protein

Modifications

Observed in the structure: 4 cofactor (pyridoxal phosphate Schiff base).

Compared structures

  • 2BHT · Crystal structure of O-acetylserine sulfhydrylase B · the same entry in another collection · chain D against D, TM-score 1.00
  • P16703 · AlphaFold monomer V2.0 prediction for cysteine synthase B (P16703) · a predicted model of the same protein · chain D against A, TM-score 0.98

Analyse

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