Isolation and molecular characterization of a new CRT binding factor gene from Capsella bursa-pastoris.
A new CRT binding factor (CBF) gene designated Cbcbf25 was cloned from Capsella bursa-pastoris, a wild grass, by the rapid amplification of cDNA ends (RACE). The full-length cDNA of Cbcbf25 was 898 bp with a 669 bp open reading frame (ORF) encoding a putative DRE/CRT (LTRE)-binding protein of 223 amino acids. The predicted CbCBF25 protein contained a potential nuclear localization signal (NLS) in its N-terminal region followed by an AP2 DNA-binding motif and a possible acidic activation domain in the C-terminal region. Bioinformatic analysis revealed that Cbcbf25 has a high level of similarity with other CBF genes like cbf1, cbf2, and cbf3 from Arabidopsis thaliana, and Bncbf5, Bncbf7, Bncbf16, and Bncbf17 from Brassica napus. A cold acclimation assay showed that Cbcbf25 was expressed immediately after cold triggering, but this expression was transient, suggesting that it concerns cold acclimation. Our study implies that Cbcbf25 is an analogue of other CBF genes and may participate in cold-response, by for example, controlling the expression of cold-regulated genes or increasing the freezing tolerance of plants.
State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Morgan-Tan International Center for Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.
Xinglong
X
Wang
Li
L
Liu
Sixiu
S
Liu
Xiaoqing
X
Sun
Zhongxiang
Z
Deng
Yan
Y
Pi
Xiaofen
X
Sun
Kexuan
K
Tang
D000595:Amino Acid Sequence; D001483:Base Sequence; D029687:Capsella / Q000235:genetics*; D018076:DNA, Complementary / Q000235:genetics; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000302:isolation & purification; D017343:Genes, Plant; D006360:Heat-Shock Proteins / Q000235:genetics; D008969:Molecular Sequence Data; D018515:Plant Leaves / Q000235:genetics; D016133:Polymerase Chain Reaction; D017434:Protein Structure, Tertiary; D016415:Sequence Alignment; D017385:Sequence Homology
D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D006360:Heat-Shock Proteins