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Principles and pitfalls in designing site directed peptide ligands

Analyse Principles and pitfalls in designing site directed peptide ligands in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
1MCI
Type
protein
Length
435 residues
Chains
3
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Immunoglobulin lambda dimer mcg (light chain); Peptide N-acetyl-D-phe-L-his-D-pro-oh
Ligands
ACE
Pockets
4 · best druggability 0.71

Structure

x-ray diffraction · 2 distinct chains · 5% helix, 44% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, BImmunoglobulin lambda dimer mcg (light chain)protein2165% helix, 45% strand—
PPeptide N-acetyl-D-phe-L-his-D-pro-ohprotein30% helix, 0% strand—

Ligands and binding sites

  • ACE · Acetyl group · ligand · chains A, B, P

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

Pockets

4 pockets found on a 1 Å grid, 2 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
18640.710.7671empty
22160.590.8035empty
31030.420.7725empty
4680.320.7517empty

Interfaces

3 interfaces between chains.

  • A–B · 1828 Ų buried · 25 hydrogen bonds · protein-protein
  • A–P · 221 Ų buried · 2 hydrogen bonds · protein-protein
  • B–P · 214 Ų buried · 2 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 5 disulfide, 2 d-amino, 1 covalent (disulfide, D-amino acid, covalent ligand).

Compared structures

  • 1MCI · Principles and pitfalls in designing site directed peptide ligands · the same entry in another collection · chain A against A, TM-score 1.00

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