7L98 image
Deposition Date 2021-01-03
Release Date 2021-09-08
Last Version Date 2024-11-13
Entry Detail
PDB ID:
7L98
Title:
Connecting hydrophobic surfaces in cyclic peptides increases membrane permeability
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Method Details:
Experimental Method:
Conformers Calculated:
50
Conformers Submitted:
4
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Cyclic peptide ALA-MEA-PRO-ILE-PRO-ITZ
Chain IDs:A
Chain Length:6
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Connecting Hydrophobic Surfaces in Cyclic Peptides Increases Membrane Permeability.
Angew.Chem.Int.Ed.Engl. 60 8385 8390 (2021)
PMID: 33185961 DOI: 10.1002/anie.202012643

Abstact

N- or C-methylation in natural and synthetic cyclic peptides can increase membrane permeability, but it remains unclear why this happens in some cases but not others. Here we compare three-dimensional structures for cyclic peptides from six families, including isomers differing only in the location of an N- or Cα-methyl substituent. We show that a single methyl group only increases membrane permeability when it connects or expands hydrophobic surface patches. Positional isomers, with the same molecular weight, hydrogen bond donors/acceptors, rotatable bonds, calculated LogP, topological polar surface area, and total hydrophobic surface area, can have different membrane permeabilities that correlate with the size of the largest continuous hydrophobic surface patch. These results illuminate a key local molecular determinant of membrane permeability.

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