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Titolo:
Changes in plasma membrane fluidity of corn (Zea mays L.) roots after Brij58 treatment
Autore:
Behzadipour, M; Kluge, M; Luthje, S;
Indirizzi:
Univ Hamburg, Inst Allgemeine Bot, D-22609 Hamburg, Germany Univ Hamburg Hamburg Germany D-22609 meine Bot, D-22609 Hamburg, Germany Tech Univ Darmstadt, Inst Bot, D-64287 Darmstadt, Germany Tech Univ Darmstadt Darmstadt Germany D-64287 D-64287 Darmstadt, Germany
Titolo Testata:
PROTOPLASMA
fascicolo: 1-3, volume: 217, anno: 2001,
pagine: 65 - 69
SICI:
0033-183X(2001)217:1-3<65:CIPMFO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
H+-ATPASE ACTIVITY; INSIDE-OUT; VESICLES; TEMPERATURE;
Keywords:
Brij 58; corn root; plasma membrane fluidity; Zea mays;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Luthje, S Univ Hamburg, Inst Allgemeine Bot, Ohnhorststr 18, D-22609 Hamburg, Germany Univ Hamburg Ohnhorststr 18 Hamburg Germany D-22609 rg, Germany
Citazione:
M. Behzadipour et al., "Changes in plasma membrane fluidity of corn (Zea mays L.) roots after Brij58 treatment", PROTOPLASMA, 217(1-3), 2001, pp. 65-69

Abstract

The detergent Brij 58 has been introduced to reverse plasma membrane (PM) vesicles from the right-side-out to the inside-out form. The aim of the present work was to investigate the effect of Brij 58 on the formation of an ATP-dependent proton gradient and on the fluidity of the lipid phase of PM vesicles. PMs of corn (Zen mays L.) roots were isolated by phase-partitioning. The fluidity of PMs was estimated by measurement of fluorescence polarization with 1-(4-trimelhylammoniumphenyl)-6-phenyl-1 hexatriene (TMA-DPH) and 1,6-diphenyl-1,3,5-hexatriene (DPH). The PMs of corn roots were relatively rigid. The hydrophobic part of the lipid bilayer was more fluid than the hydrophilic part. After intercalation of Brij 58 into the lipid bilayer themembrane fluidity changed in a concentration-dependent manner. Treatment with the detergent Brij 58 increased the degree of fluorescence polarizationfor TMA-DPH, while it decreased it for DPH. This effect was saturated at adetergent-to-protein ratio of 1:4 for both fluorescence probes. Although the biophysical characteristics of the membrane were changed after Brij 58 treatment, the formation of ATP-dependent proton gradients could still be measured with those vesicles. The generation of an ATP-dependent proton gradient with Brij 58-treated PM vesicles suggests that the detergent treatment indeed turned the originally right-side-out vesicles to sealed inside-out vesicles. The limits of the effect caused by Brij 58 in the context of PM enzyme activities are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 20:46:04