Approach to in Vivo Function of Nonspecific Lipid Transfer Proteins in Higher Plants

Yamada, Mitsuhiro; Tsuboi, Shigeru; Kosone, Makoto; Osafune, Tetsuaki; Ehara, Tomoko; Masuta, Chikara; Koiwai, Akira; Muto, Shigeaki; Yuasa, Takahito; Ariga, Hiroyoshi; Nishimura, Mikio

doi:10.1007/978-94-015-8394-7_56

Cited by 1 publication

(2 citation statements)

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“…The longest leader sequence (35 amino acids) was postulated for LTPs from barley (54). As shown in the case of LTP genes from spinach (9) and barley (64, 65) but not in castor bean (126), this signal peptide is able to direct the cotranslational insertion of the polypeptide into the lumen of the endoplasmic reticulum in vitro. It has thus been suggested that LTPs participate in the lipid movements within the lumen of the endoplasmic reticulum (65).…”

Section: Localization Of Ltpsmentioning

confidence: 99%

“…However, it cannot be excluded that some LTP isoforms are addressed to cytosolic compartments. For example, on the basis of immunocytochemical evidence, LTP from castor bean appears to be partly located within the glyoxysomes (114,126). However, it remains to be explained whether an LTP isoform is truly located in the cytosol and how it is addressed to this compartment in spite of the presence of a signal peptide.…”

Section: Localization Of Ltpsmentioning

confidence: 99%

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Lipid-Transfer Proteins in Plants

Kader

1996

Annu. Rev. Plant. Physiol. Plant. Mol. Biol.

872

695

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Lipid-transfer proteins (LTP) are basic, 9-kDa proteins present in high amounts (as much as 4% of the total soluble proteinss) in higher plants. LTPs can enhance the in vitro transfer of phospholipids between membranes and can bind acyl chains. On the basis of these properties, LTPs were thought to participate in membrane biogenesis and regulation of the intracellular fatty acid pools. However, the isolation of several cDNAs and genes revealed the presence of a signal peptide indicating that LTPs could enter the secretory pathway. They were found to be secreted and located in the cell wall. Thus, novel roles were suggested for plant LTPs: participation in cutin formation, embryogenesis, defense reactions against phytopathogens, symbiosis, and the adaptation of plants to various environmental conditions. The validity of these suggestions needs to be determined, in the hope that they will elucidate the role of this puzzling family of plant proteins.

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Section: Localization Of Ltpsmentioning

confidence: 99%

Section: Localization Of Ltpsmentioning

confidence: 99%