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Statements

Subject Item
n2:RIV%2F61389030%3A_____%2F10%3A00359312%21RIV11-GA0-61389030
rdf:type
skos:Concept n16:Vysledek
dcterms:description
The plant hormone auxin plays a crucial role in regulating plant development and plant architecture. The directional auxin distribution within tissues depends on PIN transporters that are polarly localized on the plasma membrane. The PIN polarity and the resulting auxin flow directionality are mediated by the antagonistic actions of PINOID kinase and protein phosphatase 2A. However, the contribution of the PIN phosphorylation to the polar PIN sorting is still unclear. Here, we identified an evolutionarily conserved phosphorylation site within the central hydrophilic loop of PIN proteins that is important for the apical and basal polar PIN localizations. Inactivation of the phosphorylation site in PIN1(Ala) resulted in a predominantly basal targeting and increased the auxin flow to the root tip. In contrast, the outcome of the phosphomimic PIN1(Asp) manipulation was a constitutive, PINOID-independent apical targeting of PIN1 and an increased auxin flow in the opposite direction. The plant hormone auxin plays a crucial role in regulating plant development and plant architecture. The directional auxin distribution within tissues depends on PIN transporters that are polarly localized on the plasma membrane. The PIN polarity and the resulting auxin flow directionality are mediated by the antagonistic actions of PINOID kinase and protein phosphatase 2A. However, the contribution of the PIN phosphorylation to the polar PIN sorting is still unclear. Here, we identified an evolutionarily conserved phosphorylation site within the central hydrophilic loop of PIN proteins that is important for the apical and basal polar PIN localizations. Inactivation of the phosphorylation site in PIN1(Ala) resulted in a predominantly basal targeting and increased the auxin flow to the root tip. In contrast, the outcome of the phosphomimic PIN1(Asp) manipulation was a constitutive, PINOID-independent apical targeting of PIN1 and an increased auxin flow in the opposite direction.
dcterms:title
PIN phosphorylation is sufficient to mediate PIN polarity and direct auxin transport PIN phosphorylation is sufficient to mediate PIN polarity and direct auxin transport
skos:prefLabel
PIN phosphorylation is sufficient to mediate PIN polarity and direct auxin transport PIN phosphorylation is sufficient to mediate PIN polarity and direct auxin transport
skos:notation
RIV/61389030:_____/10:00359312!RIV11-GA0-61389030
n3:aktivita
n12:Z n12:P
n3:aktivity
P(GA301/08/1649), Z(AV0Z50380511), Z(MSM6198959216)
n3:cisloPeriodika
2
n3:dodaniDat
n5:2011
n3:domaciTvurceVysledku
n9:7945736 n9:3491498
n3:druhVysledku
n18:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
279010
n3:idVysledku
RIV/61389030:_____/10:00359312
n3:jazykVysledku
n13:eng
n3:klicovaSlova
cell polarity; auxin distribution; plant architecture
n3:klicoveSlovo
n11:plant%20architecture n11:auxin%20distribution n11:cell%20polarity
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[F8BA8187579C]
n3:nazevZdroje
Proceedings of the National Academy of Sciences of the United States of America
n3:obor
n14:EF
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
5
n3:projekt
n15:GA301%2F08%2F1649
n3:rokUplatneniVysledku
n5:2010
n3:svazekPeriodika
107
n3:tvurceVysledku
Friml, J. Pěnčík, Aleš Rolčík, Jakub Nodzynski, T. Zhang, J.
n3:wos
000273559300073
n3:zamer
n8:AV0Z50380511 n8:MSM6198959216
s:issn
0027-8424
s:numberOfPages
5