TY  - BOOK
AU  - Tsiavos,Theodoros
AU  - Ioannidis,Nikolaos E.
AU  - Tsortos,Achilleas
AU  - Gizeli,Electra
AU  - Kotzabasis,Kiriakos
TI  - Spermine is a potent modulator of proton transport through LHCII
SN  - 0176-1617
AV  - QK711.2 JOU 
PY  - 2015///
CY  - Amsterdam
PB  - Elsevier GmbH
KW  - Aggregation
KW  - Light harvesting complex II
KW  - Liposomes
N2  - The effect of spermine on proton transport across large unilamellar liposomes containing incorporated complexes of the PSII antenna has been studied with the application of a pH-sensitive dye entrapped inside the vesicles. Both monomeric LHCbs and trimeric LHCII increased the permeability of proteoliposomes to protons when in a partly aggregated state within the lipid membrane. We have previously shown that a spermine-induced conformational change in LHCII results in its aggregation and ultimately in the enhancement of excitation energy as heat (qE). In this paper, spermine-induced aggregation of LHCII was found to facilitate proton transport across the proteoliposomes, indicating that a second protective mechanism (other than qE) might exist and might be regulated in vivo by polyamines when photosynthesis is saturated in excess light
UR  - https://doi.org/10.1016/j.jplph.2015.01.010
ER  -