Characterization of a novel cell cycle-related gene from Arabidopsis.
Cell division is a fundamental biological process sharing conserved features and controls in all eukaryotes. The cell cycle is usually divided into four phases: G1, S, G2, and M. Regulated gene expression is an important mechanism for controlling cell cycle progression and genes involved in cell division-related processes often show transcriptional regulation dependent on cell cycle position. In the present report, a novel cell cycle-related gene (AtCPR) from Arabidopsis thaliana was isolated and characterized. Sequence analysis revealed that the deduced amino acid sequence of AtCPR showed 53.2% identity with p38-2G4, a mouse G1-to-S cell cycle specifically modulated and proliferation-associated nuclear protein. Assay of expression of AtCPR in partially synchronized cells suggested that AtCPR mRNA was expressed in the G1-to-S phase. In the AtCPR transgenic plants, no apparent phenotypic change was observed. By fusing a GFP tag to the AtCPR protein, it was found that AtCPR was mainly located in the nucleus. However, AtCPR does not have any transcriptional activation ability. cDNA microarray analysis showed that a total of 17 and 30 genes were identified as up-regulated and down-regulated, respectively.
Zhang
Wan-Ke
WK
National Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, The Chinese Academy of Sciences, Beijing 100101, PR China.
Shen
Yi-Guo
YG
He
Xin-Jian
XJ
Du
Bao-Xing
BX
Xie
Zong-Ming
ZM
Luo
Guang-Zuo
GZ
Zhang
Jin-Song
JS
Chen
Shou-Yi
SY
D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000166:cytology / Q000235:genetics* / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D002453:Cell Cycle / Q000235:genetics; D015536:Down-Regulation; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D030821:Plants, Genetically Modified; D017386:Sequence Homology, Amino Acid; D015854:Up-Regulation / Q000502:physiology
D029681:Arabidopsis Proteins; C500887:CPR protein, Arabidopsis; D009687:Nuclear Proteins