Specific molecular recognition by chiral cage-type cyclophanes having leucine, valine, and alanine residue

Osamu Hayashida, Kazuya Ono, Yoshio Hisaeda, Yukito Murakami

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Chiral cage-type cyclophanes were constructed with two rigid macrocyclic skeletons and four bridging components bearing chiral leucine, valine, and alanine residues, individually. These host molecules strongly bind anionic and hydrophobic guests, such as 8-anilinonaphthalene-1-sulfonate and 6-p-toluidinonaphthalene-2-sulfonate. Thermodynamic parameters were evaluated from temperature-dependent complexation constants determined by fluorescence spectroscopy, and gave negative ΔH and positive ΔS values; especially large values for the cage-type cyclophanes having leucine residues. The positive ΔS values come primarily from effective desolvation of the guest molecules when incorporated into the hydrophobic host cavities, as evidenced by fluorescence parameters. The four bridging segments of the cage-type hosts having chiral amino acid residues seem to undergo chiral twist in the same directions in the light of circular dichroism (CD) spectroscopy. Such helical conformations of the cyclophanes must be caused by chiral nature of the amino acid residues, and the extent of twist in helical conformations is as follows; leucine > valine > alanine. In addition, the twisted direction of bridging segments in the cage-type hosts having L-amino acid residues is opposite to that evaluated for those having D-amino acid residues, so that the former and latter cyclophanes furnish M- and P-helical cavities, respectively. The chirality-based molecular recognition of the cage-type hosts toward an enantiomeric guest, bilirubin-IXα, was investigated by CD spectroscopy in aqueous media.

Original languageEnglish
Pages (from-to)8423-8436
Number of pages14
JournalTetrahedron
Volume51
Issue number31
DOIs
Publication statusPublished - Jul 31 1995

Fingerprint

Molecular recognition
Valine
Leucine
Alanine
Circular dichroism spectroscopy
Amino Acids
Circular Dichroism
Conformations
Spectrum Analysis
Bearings (structural)
Molecules
Chirality
Fluorescence Spectrometry
Fluorescence spectroscopy
Complexation
Thermodynamics
Bilirubin
Skeleton
Fluorescence
Temperature

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

Cite this

Specific molecular recognition by chiral cage-type cyclophanes having leucine, valine, and alanine residue. / Hayashida, Osamu; Ono, Kazuya; Hisaeda, Yoshio; Murakami, Yukito.

In: Tetrahedron, Vol. 51, No. 31, 31.07.1995, p. 8423-8436.

Research output: Contribution to journalArticle

Hayashida, Osamu ; Ono, Kazuya ; Hisaeda, Yoshio ; Murakami, Yukito. / Specific molecular recognition by chiral cage-type cyclophanes having leucine, valine, and alanine residue. In: Tetrahedron. 1995 ; Vol. 51, No. 31. pp. 8423-8436.
@article{0c97a39e24d746c596562cdef6a2efcf,
title = "Specific molecular recognition by chiral cage-type cyclophanes having leucine, valine, and alanine residue",
abstract = "Chiral cage-type cyclophanes were constructed with two rigid macrocyclic skeletons and four bridging components bearing chiral leucine, valine, and alanine residues, individually. These host molecules strongly bind anionic and hydrophobic guests, such as 8-anilinonaphthalene-1-sulfonate and 6-p-toluidinonaphthalene-2-sulfonate. Thermodynamic parameters were evaluated from temperature-dependent complexation constants determined by fluorescence spectroscopy, and gave negative ΔH and positive ΔS values; especially large values for the cage-type cyclophanes having leucine residues. The positive ΔS values come primarily from effective desolvation of the guest molecules when incorporated into the hydrophobic host cavities, as evidenced by fluorescence parameters. The four bridging segments of the cage-type hosts having chiral amino acid residues seem to undergo chiral twist in the same directions in the light of circular dichroism (CD) spectroscopy. Such helical conformations of the cyclophanes must be caused by chiral nature of the amino acid residues, and the extent of twist in helical conformations is as follows; leucine > valine > alanine. In addition, the twisted direction of bridging segments in the cage-type hosts having L-amino acid residues is opposite to that evaluated for those having D-amino acid residues, so that the former and latter cyclophanes furnish M- and P-helical cavities, respectively. The chirality-based molecular recognition of the cage-type hosts toward an enantiomeric guest, bilirubin-IXα, was investigated by CD spectroscopy in aqueous media.",
author = "Osamu Hayashida and Kazuya Ono and Yoshio Hisaeda and Yukito Murakami",
year = "1995",
month = "7",
day = "31",
doi = "10.1016/0040-4020(95)00458-K",
language = "English",
volume = "51",
pages = "8423--8436",
journal = "Tetrahedron",
issn = "0040-4020",
publisher = "Elsevier Limited",
number = "31",

}

TY - JOUR

T1 - Specific molecular recognition by chiral cage-type cyclophanes having leucine, valine, and alanine residue

AU - Hayashida, Osamu

AU - Ono, Kazuya

AU - Hisaeda, Yoshio

AU - Murakami, Yukito

PY - 1995/7/31

Y1 - 1995/7/31

N2 - Chiral cage-type cyclophanes were constructed with two rigid macrocyclic skeletons and four bridging components bearing chiral leucine, valine, and alanine residues, individually. These host molecules strongly bind anionic and hydrophobic guests, such as 8-anilinonaphthalene-1-sulfonate and 6-p-toluidinonaphthalene-2-sulfonate. Thermodynamic parameters were evaluated from temperature-dependent complexation constants determined by fluorescence spectroscopy, and gave negative ΔH and positive ΔS values; especially large values for the cage-type cyclophanes having leucine residues. The positive ΔS values come primarily from effective desolvation of the guest molecules when incorporated into the hydrophobic host cavities, as evidenced by fluorescence parameters. The four bridging segments of the cage-type hosts having chiral amino acid residues seem to undergo chiral twist in the same directions in the light of circular dichroism (CD) spectroscopy. Such helical conformations of the cyclophanes must be caused by chiral nature of the amino acid residues, and the extent of twist in helical conformations is as follows; leucine > valine > alanine. In addition, the twisted direction of bridging segments in the cage-type hosts having L-amino acid residues is opposite to that evaluated for those having D-amino acid residues, so that the former and latter cyclophanes furnish M- and P-helical cavities, respectively. The chirality-based molecular recognition of the cage-type hosts toward an enantiomeric guest, bilirubin-IXα, was investigated by CD spectroscopy in aqueous media.

AB - Chiral cage-type cyclophanes were constructed with two rigid macrocyclic skeletons and four bridging components bearing chiral leucine, valine, and alanine residues, individually. These host molecules strongly bind anionic and hydrophobic guests, such as 8-anilinonaphthalene-1-sulfonate and 6-p-toluidinonaphthalene-2-sulfonate. Thermodynamic parameters were evaluated from temperature-dependent complexation constants determined by fluorescence spectroscopy, and gave negative ΔH and positive ΔS values; especially large values for the cage-type cyclophanes having leucine residues. The positive ΔS values come primarily from effective desolvation of the guest molecules when incorporated into the hydrophobic host cavities, as evidenced by fluorescence parameters. The four bridging segments of the cage-type hosts having chiral amino acid residues seem to undergo chiral twist in the same directions in the light of circular dichroism (CD) spectroscopy. Such helical conformations of the cyclophanes must be caused by chiral nature of the amino acid residues, and the extent of twist in helical conformations is as follows; leucine > valine > alanine. In addition, the twisted direction of bridging segments in the cage-type hosts having L-amino acid residues is opposite to that evaluated for those having D-amino acid residues, so that the former and latter cyclophanes furnish M- and P-helical cavities, respectively. The chirality-based molecular recognition of the cage-type hosts toward an enantiomeric guest, bilirubin-IXα, was investigated by CD spectroscopy in aqueous media.

UR - http://www.scopus.com/inward/record.url?scp=0029073486&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029073486&partnerID=8YFLogxK

U2 - 10.1016/0040-4020(95)00458-K

DO - 10.1016/0040-4020(95)00458-K

M3 - Article

AN - SCOPUS:0029073486

VL - 51

SP - 8423

EP - 8436

JO - Tetrahedron

JF - Tetrahedron

SN - 0040-4020

IS - 31

ER -