Four-component pharmacophore model for endomorphins toward μ opioid receptor subtypes

Yng Ching Wu, Tim Jaglinski, Jin Yuan Hsieh, Jia Jyun Chiu, Tzen-Yuh Chiang, Chi-Chuan Hwang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In the present work, a series of simulation tools were used to determine structure-activity relationships for the endomorphins (EMs) and derive μ-pharmacophore models for these peptides. Potential lowest energy conformations were determined in vacuo by systematically varying the torsional angles of the Tyr 1-Pro 21) and Pro 2- Trp 3/Phe 32) as tuning parameters in AM1 calculations. These initial models were then exposed to aqueous conditions via molecular dynamics simulations. In aqueous solution, the simulations suggest that endomorphin conformers strongly favor the trans/trans pair of the ω 12 amide bonds. From two-dimensional probability distributions of the ring-to-ring distances with respect to the pharmacophoric angles for EMs, a selectivity range of μ 1 is ca. 8.3~10.5 Å for endomorphin-2 and selectivity range of μ 2 is ca. 10.5~13.0 Å for endomorphin-1 were determined. Four-component μ-pharmacophore models are proposed for EMs and are compared to the previously published δ- and κ-pharmacophore models.

Original languageEnglish
Pages (from-to)825-834
Number of pages10
JournalJournal of Molecular Modeling
Volume18
Issue number2
DOIs
Publication statusPublished - 2012 Feb 1

Fingerprint

Opioid Receptors
selectivity
simulation
rings
Amides
Probability distributions
Peptides
amides
peptides
Conformations
Molecular dynamics
Tuning
tuning
molecular dynamics
aqueous solutions
Computer simulation
energy

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Computer Science Applications
  • Computational Theory and Mathematics
  • Catalysis
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

Wu, Yng Ching ; Jaglinski, Tim ; Hsieh, Jin Yuan ; Chiu, Jia Jyun ; Chiang, Tzen-Yuh ; Hwang, Chi-Chuan. / Four-component pharmacophore model for endomorphins toward μ opioid receptor subtypes. In: Journal of Molecular Modeling. 2012 ; Vol. 18, No. 2. pp. 825-834.
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Four-component pharmacophore model for endomorphins toward μ opioid receptor subtypes. / Wu, Yng Ching; Jaglinski, Tim; Hsieh, Jin Yuan; Chiu, Jia Jyun; Chiang, Tzen-Yuh; Hwang, Chi-Chuan.

In: Journal of Molecular Modeling, Vol. 18, No. 2, 01.02.2012, p. 825-834.

Research output: Contribution to journalArticle

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