Literature DB >> 1688716

Kinetics of channel formation of gramicidins A and B in phospholipid vesicle membranes.

P L Easton1, J F Hinton, D K Newkirk.   

Abstract

The thermal incorporation and channel formation of gramicidins A and B into phosphatidylcholine/phosphatidylglycerol large unilamellar vesicle membranes was studied using 23Na NMR. Delta H and delta S of activation for channel formation for gramicidin A are 11.8 kcal/mol and -11 e.u., respectively. For gramicidin B, delta H and delta S of activation are 14.6 kcal/mol and -4 e.u., respectively. Possible reasons for the differences in delta H and delta S of activation between the two analogues are discussed.

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Year:  1990        PMID： 1688716      PMCID： PMC1280643          DOI： 10.1016/S0006-3495(90)82507-8

Source DB:  PubMed          Journal:  Biophys J        ISSN： 0006-3495            Impact factor:   4.033


  21 in total

1.  23Na-nuclear magnetic resonance investigation of gramicidin-induced ion transport through membranes under equilibrium conditions.

Authors:  D C Buster; J F Hinton; F S Millett; D C Shungu
Journal:  Biophys J       Date:  1988-02       Impact factor: 4.033

2.  Temperature-induced incorporation of gramicidin A into lysolecithin micelles demonstrated by 13C NMR.

Authors:  A Spisni; M A Khaled; D W Urry
Journal:  FEBS Lett       Date:  1979-06-15       Impact factor: 4.124

3.  N-acetyl gramicidin: single-channel properties and implications for channel structure.

Authors:  G Szabo; D W Urry
Journal:  Science       Date:  1979-01-05       Impact factor: 47.728

4.  Ion movement through gramicidin A channels. Single-channel measurements at very high potentials.

Authors:  O S Andersen
Journal:  Biophys J       Date:  1983-02       Impact factor: 4.033

5.  Intermolecular interactions of gramicidin A' transmembrane channels incorporated into lysophosphatidylcholine lipid systems.

Authors:  P Cavatorta; A Spisni; E Casali; L Lindner; L Masotti; D W Urry
Journal:  Biochim Biophys Acta       Date:  1982-07-14

6.  Solution, interfacial, and membrane properties of gramicidin A.

Authors:  G Kemp; C Wenner
Journal:  Arch Biochem Biophys       Date:  1976-10       Impact factor: 4.013

7.  Conformation of gramicidin A channel in phospholipid vesicles: a 13C and 19F nuclear magnetic resonance study.

Authors:  S Weinstein; B A Wallace; E R Blout; J S Morrow; W Veatch
Journal:  Proc Natl Acad Sci U S A       Date:  1979-09       Impact factor: 11.205

Review 8.  Lipid polymorphism and the functional roles of lipids in biological membranes.

Authors:  P R Cullis; B de Kruijff
Journal:  Biochim Biophys Acta       Date:  1979-12-20

9.  Structure of the gramicidin A channel: discrimination between the piL,D and the beta helix by electrical measurements with lipid bilayer membranes.

Authors:  E Bamberg; H J Apell; H Alpes
Journal:  Proc Natl Acad Sci U S A       Date:  1977-06       Impact factor: 11.205

10.  Tryptophan interactions of gramicidin A' channels in lipids: a time-resolved fluorescence study.

Authors:  L Masotti; P Cavatorta; G Sartor; E Casali; A G Szabo
Journal:  Biochim Biophys Acta       Date:  1986-11-17
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  3 in total

1.  23Na-nuclear magnetic resonance study of ionophore-mediated cation exchange between two populations of liposomes.

Authors:  A R Waldeck; P W Kuchel
Journal:  Biophys J       Date:  1993-05       Impact factor: 4.033

2.  Effects of phenylalanine substitutions in gramicidin A on the kinetics of channel formation in vesicles and channel structure in SDS micelles.

Authors:  J B Jordan; P L Easton; J F Hinton
Journal:  Biophys J       Date:  2004-10-22       Impact factor: 4.033

3.  Influence of ion occupancy and membrane deformation on gramicidin A channel stability in lipid membranes.

Authors:  A Ring
Journal:  Biophys J       Date:  1992-05       Impact factor: 4.033
  3 in total

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