Degradation of sphingoid long-chain base 1-phosphates (LCB-1Ps): functional characterization and expression of AtDPL1 encoding LCB-1P lyase involved in the dehydration stress response in Arabidopsis.

Autor: Nishikawa M; Department of Biology, Graduate School of Natural Science, Konan University, Kobe, 658-8501, Japan., Hosokawa K, Ishiguro M, Minamioka H, Tamura K, Hara-Nishimura I, Takahashi Y, Shimazaki K, Imai H
Jazyk: angličtina
Zdroj: Plant & cell physiology [Plant Cell Physiol] 2008 Nov; Vol. 49 (11), pp. 1758-63. Date of Electronic Publication: 2008 Oct 11.
DOI: 10.1093/pcp/pcn149
Abstrakt: Sphingoid long-chain base (LCB) 1-phosphates are degradated by LCB 1-phosphate lyase to C(16) fatty aldehydes and phosphoethanolamine. Here, we confirmed that the At1g27980 gene product, AtDPL1, is a functional LCB-1-phosphate lyase. Expression of green fluorescent protein fusion products in suspension-cultured Arabidopsis cells showed that AtDPL1 is located to the endoplasmic reticulum. The rates of fresh weight decreases of dpl1-1 and dpl1-2 mutants were significantly slower than those of the wild-type plants. This ability to limit their transpiration reflected the leaf temperature of the mutant plants more than that of wild-type plants, suggesting that AtDPL1 plays a role in dehydration stress.
Databáze: MEDLINE