7RC6 image
Deposition Date 2021-07-07
Release Date 2022-03-30
Last Version Date 2024-12-25
Entry Detail
PDB ID:
7RC6
Keywords:
TRANSFERASE/BIOSYNTHETIC PROTEIN
Title:
Aeronamide N-methyltransferase, AerE, bound to modified peptide substrate, AerA-DL,34
Biological Source:
Source Organism:
Microvirgula aerodenitrificans DSM 15089 (Taxon ID: 1122240)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.71 Å
R-Value Free:
0.18
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 32 2 1
7RC6 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Methyltransferase family protein
Chain IDs:A
Chain Length:384
Number of Molecules:1
Biological Source:Microvirgula aerodenitrificans DSM 15089
UniProt ID:A0A2S0PEL5 Pfam ID:PF05175
Polymer Type:polypeptide(L)
Molecule:Aeronamide A peptide
Chain IDs:B (auth: C)
Chain Length:34
Number of Molecules:1
Biological Source:Microvirgula aerodenitrificans DSM 15089
Ligand Molecules
NA
SAH
Primary Citation
Structure and mechanism for iterative amide N -methylation in the biosynthesis of channel-forming peptide cytotoxins.
Proc.Natl.Acad.Sci.USA 119 e2116578119 e2116578119 (2022)
PMID: 35316135 DOI: 10.1073/pnas.2116578119

Abstact

SignificanceThe channel-forming proteusins are bacterial helical peptides that allow permeation of positively charged ions to influence membrane potential and cellular physiology. We biochemically characterize the effect of two critical posttranslational modifications on the secondary structure of the peptide substrate. We determine how a methyl group can be added to the side chains of D-Asn residues in a peptide substrate and show how flanking residues influence selectivity. These studies should foster the development of small-molecule peptide ion channels as therapeutics.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
7RC6