title: A novel splice variant of human XRN2 gene is mainly expressed in blood leukocyte.
abstract: The XRN2 gene (XRN2a) is the human homologue of the Saccharomyces cerevisiae RAT1 gene, which encodes a nuclear 5'-->3' exoribonuclease, and is essential for RNA metabolism and cell viability. Xrn2p/Rat1p, product of XRN2/RAT1 gene, functions in the mRNA degradation and processing of rRNAs and small nucleolar RNAs (snoRNAs) in the nucleus. Here we describe the cloning and characterization of a novel splice variant of the human XRN2 gene (XRN2b). The 3271-bp cDNA encodes a putative protein with 907 amino acid residues, which shares high homology with mouse DHM1 protein. RT-PCR analysis showed that XRN2b was mainly expressed in blood leukocyte tissue, while XRN2a was detected in several human tissues and in human tumor tissues.
authors.forename: Jixi
authors.initials: J
authors.lastname: Li
authors.forename: Huarui
authors.initials: H
authors.lastname: Zheng
authors.forename: Chaoneng
authors.initials: C
authors.lastname: Ji
authors.forename: Xiangwei
authors.initials: X
authors.lastname: Fei
authors.forename: Mei
authors.initials: M
authors.lastname: Zheng
authors.forename: Yongjuan
authors.initials: Y
authors.lastname: Gao
authors.forename: Yan
authors.initials: Y
authors.lastname: Ren
authors.forename: Shaohua
authors.initials: S
authors.lastname: Gu
authors.forename: Yi
authors.initials: Y
authors.lastname: Xie
authors.forename: Yumin
authors.initials: Y
authors.lastname: Mao
mesh_terms: D017398:Alternative Splicing; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001921:Brain / Q000378:metabolism; D045744:Cell Line, Tumor; D002467:Cell Nucleus / Q000378:metabolism; D018076:DNA, Complementary / Q000378:metabolism; D005095:Exoribonucleases / Q000737:chemistry* / Q000235:genetics*; D015723:Gene Library; D006801:Humans; D007962:Leukocytes / Q000378:metabolism*; D051379:Mice; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000378:metabolism; D012335:RNA, Ribosomal / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid
chemical_list: D018076:DNA, Complementary; D012333:RNA, Messenger; D012335:RNA, Ribosomal; D005095:Exoribonucleases; C120903:XRN2 protein, human