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Crystal structure of I83E meditope-enabled trastuzumab with azido- PEG3-meditope

Analyse Crystal structure of I83E meditope-enabled trastuzumab with azido- PEG3-meditope in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
5U6A
Type
protein
Length
567 residues
Chains
5
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Light chain; Heavy chain; Protein L; Immunoglobulin G binding protein a; Meditope peptide
UniProt
Q51918, Q2UW42
Ligands
ACE, MRY
Pockets
9 · best druggability 0.59

Structure

x-ray diffraction · 5 distinct chains · 17% helix, 47% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
ALight chainprotein2146% helix, 51% strand—
BHeavy chainprotein2239% helix, 54% strand—
EProtein Lprotein6335% helix, 44% strandQ51918
CImmunoglobulin G binding protein aprotein5478% helix, 0% strandQ2UW42
DMeditope peptideprotein130% helix, 46% strand—

Ligands and binding sites

  • ACE · Acetyl group · ligand · chains A, E, D
  • MRY · Meso-erythritol · ligand · chains B, D

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

Pockets

9 pockets found on a 1 Å grid, 4 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
11590.590.8329empty
23350.580.7743MRY
3640.530.8722empty
42790.530.7543empty
51940.480.7631empty

Interfaces

6 interfaces between chains.

  • A–B · 1993 Ų buried · 18 hydrogen bonds · protein-protein
  • A–E · 700 Ų buried · 11 hydrogen bonds · protein-protein
  • B–D · 647 Ų buried · 6 hydrogen bonds · protein-protein
  • B–C · 587 Ų buried · 10 hydrogen bonds · protein-protein
  • A–D · 510 Ų buried · 13 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 6 disulfide, 2 modified, 1 covalent (disulfide, nonstandard, covalent ligand).

Compared structures

  • 5U6A · Crystal structure of I83E meditope-enabled trastuzumab with azido-PEG3-meditope · the same entry in another collection · chain A against A, TM-score 1.00

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