The interactions of neuropeptides with membrane model systems: A case study

Rickey Paige Hicks, Debbie J. Beard, John K. Young

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The interactions between the positively charged neuropeptides substance P (SP), bradykinin (BK), and zwitterionic Met‐enkephalin (ME) neuropeptides, and negatively charged SDS and zwitterionic lysophosphatidylcholine (LPC) membrane model systems, have been investigated using one‐ and two–dimensional nmr experiments. Proton longitudinal relaxation studies were used to characterize these interactions as intrinsic or extrinsic. An extrinsic interaction are similar to those observed for extrinsic membrane proteins. An intrinsic interaction are similar to those observed for intrinsic membrane proteins, and would require that the hydrophobic residues penetrate or insert into the hydrophobic core of the membrane. The interactions between both SP and BK and SDS, based on nmr results, may be characterized as intrinsic, and the interaction between ME and SDS may be characterized as extrinsic. Two–dimensional nuclear Overhauser enhancement spectroscopy experiments proved the insertion of the phenylalanine residues on both SP and BK into the hydrophobic core of SDS micelles. The interaction between SP and BK with LPC based on nmr results are characterized as extrinsic, with the interaction between ME and SDS characterized as weakly intrinsic.

Original languageEnglish (US)
Pages (from-to)85-96
Number of pages12
JournalBiopolymers
Volume32
Issue number1
DOIs
StatePublished - Jan 1 1992

Fingerprint

Bradykinin
Substance P
Neuropeptides
Membranes
Lysophosphatidylcholines
Membrane Proteins
Proteins
Die casting inserts
Micelles
Phenylalanine
Longitudinal Studies
Protons
Spectrum Analysis
Experiments
Spectroscopy

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Biomaterials
  • Organic Chemistry

Cite this

The interactions of neuropeptides with membrane model systems : A case study. / Hicks, Rickey Paige; Beard, Debbie J.; Young, John K.

In: Biopolymers, Vol. 32, No. 1, 01.01.1992, p. 85-96.

Research output: Contribution to journalArticle

Hicks, Rickey Paige ; Beard, Debbie J. ; Young, John K. / The interactions of neuropeptides with membrane model systems : A case study. In: Biopolymers. 1992 ; Vol. 32, No. 1. pp. 85-96.
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