Structural features of peptoid-peptide hybrids in lipid-water interfaces

TY - JOUR

T1 - Structural features of peptoid-peptide hybrids in lipid-water interfaces

AU - Uggerhøj, Lars Erik

AU - Munk, Jens K.

AU - Hansen, Paul Robert

AU - Güntert, Peter

AU - Wimmer, Reinhard

PY - 2014/8/25

Y1 - 2014/8/25

N2 - The inclusion of peptoid monomers into antimicrobial peptides (AMPs) increases their proteolytic resistance, but introduces conformational flexibility (reduced hydrogen bonding ability and cis/trans isomerism). We here use NMR spectroscopy to answer how the insertion of a peptoid monomer influences the structure of a regular α-helical AMP upon interaction with a dodecyl phosphocholine (DPC) micelle. Insertion of [(2-methylpropyl)amino]acetic acid in maculatin-G15 shows that the structural change and conformational flexibility depends on the site of insertion. This is governed by the micelle interaction of the amphipathic helices flanking the peptoid monomer and the side chain properties of the peptoid and its preceding residue.

AB - The inclusion of peptoid monomers into antimicrobial peptides (AMPs) increases their proteolytic resistance, but introduces conformational flexibility (reduced hydrogen bonding ability and cis/trans isomerism). We here use NMR spectroscopy to answer how the insertion of a peptoid monomer influences the structure of a regular α-helical AMP upon interaction with a dodecyl phosphocholine (DPC) micelle. Insertion of [(2-methylpropyl)amino]acetic acid in maculatin-G15 shows that the structural change and conformational flexibility depends on the site of insertion. This is governed by the micelle interaction of the amphipathic helices flanking the peptoid monomer and the side chain properties of the peptoid and its preceding residue.

U2 - 10.1016/j.febslet.2014.07.016

DO - 10.1016/j.febslet.2014.07.016

M3 - Journal article

C2 - 25063337

SN - 0014-5793

VL - 588

SP - 3291

EP - 3297

JO - F E B S Letters

JF - F E B S Letters

IS - 17

ER -