Cloning and characterization of three genes encoding Qb-SNARE proteins in rice

Molecular Genetics and Genomics : MGG
Yong-Mei BaoHong-Sheng Zhang

Abstract

Qb-SNARE proteins belong to the superfamily of SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptors) and function as important components of the vesicle trafficking machinery in eukaryotic cells. Here, we report three novel plant SNARE (NPSN) genes isolated from rice and named OsNPSN11, OsNPSN12 and OsNPSN13. They have about 70% nucleotide identity over their entire coding regions and similar genomic organization with ten exons and nine introns in each gene. Multiple alignment of deduced amino acid sequences indicate that the OsNPSNs proteins are homologous to AtNPSNs from Arabidopsis, containing a Qb-SNARE domain and a membrane-spanning domain in the C-terminal region. Semi-quantitative RT-PCR assays showed that the OsNPSNs were ubiquitously and differentially expressed in roots, culms, leaves, immature spikes and flowering spikes. The expression of OsNPSNs was significantly activated in rice seedlings treated with H(2)O(2), but down-regulated under NaCl and PEG6000 stresses. Transient expression method in onion epidermal cells revealed that OsNPSNs were located in the plasma membrane. Transformed yeast cells with OsNPSNs had better growth rates than empty-vector transformants when cultured on either ...Continue Reading

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Citations

Aug 6, 2008·Plant Physiology·Diane C Bassham, Michael R Blatt
Jul 10, 2009·Yi chuan = Hereditas·Hua FengXi-Hua DU

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