title: Cloning and characterization of a novel small monomeric GTPase, RasL10B, with tumor suppressor potential.
abstract: Ras proteins are members of the superfamily of small GTPase. A novel human Ras-like transcript, termed RasL10B, was isolated from human blood cell cDNA library. RasL10B gene contains four exons and three introns, which encodes a 203 amino acid protein with a molecular mass of about 23.2 kDa. RT-PCR analysis showed that RasL10B is expressed extensively in human tissues. Subcellular location analysis of GFP-RasL10B fusion protein revealed that RasL10B was distributed to the cytoplasm of COS7 cells. In addition, RasL10B was expressed in E. coli Rosette (DE3) and purified to a homogenicity by Ni-NTA affinity chromatography. Finally, the mRNA levels of RasL10B were down-regulated in all human breast cancer cell lines we tested. In summary, RasL10B is a new member of Ras superfamily with tumor suppressor potential.
authors.affiliation: State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences, Fudan University, Shanghai, PR China.
authors.forename: Huafei
authors.initials: H
authors.lastname: Zou
authors.forename: Lide
authors.initials: L
authors.lastname: Hu
authors.forename: Jixi
authors.initials: J
authors.lastname: Li
authors.forename: Shuxuan
authors.initials: S
authors.lastname: Zhan
authors.forename: Kaiming
authors.initials: K
authors.lastname: Cao
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D019556:COS Cells; D045744:Cell Line, Tumor; D002522:Chlorocebus aethiops; D003001:Cloning, Molecular; D003593:Cytoplasm / Q000378:metabolism; D004926:Escherichia coli / Q000378:metabolism; D020558:GTP Phosphohydrolases / Q000737:chemistry*; D016147:Genes, Tumor Suppressor; D006801:Humans; D008969:Molecular Sequence Data; D017386:Sequence Homology, Amino Acid; D014018:Tissue Distribution; D018631:ras Proteins / Q000737:chemistry* / Q000235:genetics*
chemical_list: C522805:RASL10B protein, human; D020558:GTP Phosphohydrolases; D018631:ras Proteins