title: Molecular cloning of a member of the facilitative glucose transporter gene family GLUT11 (SLC2A11) and identification of transcription variants.
abstract: We isolated a member of the facilitative glucose transporter (GLUT) gene family (GLUT11; SLC2A11 as a HGMW-approved symbol) based on the analysis of a human genomic BAC clone KB1125A3 located on band q11.2 of human chromosome 22. The gene GLUT11/SLC2A11 consists of 12 exons spanning over 29 kb in size and is located between two genes, SMARCB1 and MIF. The deduced amino acid sequence indicated the topological features of transmembrane helices and sequence motifs which are common to the GLUT protein family. The cDNA cloning revealed the presence of three types of variation in its transcripts. The first variation is caused by the existence of three distinct first exons (SLC2A11-a, -b, and -c). PCR analysis of multi-tissue-derived cDNA panels indicated the differential expression of these transcript variants. The second variation is caused by skipping over one exon (exon 6). The third variation is caused by the premature transcription termination at a site between exon 8 and exon 9. Both exon skipping and premature termination caused frameshift, resulting in the production of truncated GLUT11/SLC2A11 transcripts. These results suggested that transcription of GLUT11/SCL2A11 gene is controlled in a complex manner.
authors.affiliation: Department of Molecular Biology, Keio University School of Medicine, Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Sasaki
authors.forename: S
authors.initials: S
authors.lastname: Minoshima
authors.forename: A
authors.initials: A
authors.lastname: Shiohama
authors.forename: A
authors.initials: A
authors.lastname: Shintani
authors.forename: A
authors.initials: A
authors.lastname: Shimizu
authors.forename: S
authors.initials: S
authors.lastname: Asakawa
authors.forename: K
authors.initials: K
authors.lastname: Kawasaki
authors.forename: N
authors.initials: N
authors.lastname: Shimizu
mesh_terms: D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D001483:Base Sequence; D002874:Chromosome Mapping; D022202:Chromosomes, Artificial, Bacterial / Q000235:genetics; D002892:Chromosomes, Human, Pair 22 / Q000235:genetics; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D005091:Exons; D015870:Gene Expression; D014644:Genetic Variation; D051246:Glucose Transport Proteins, Facilitative; D006801:Humans; D007438:Introns; D008969:Molecular Sequence Data; D009004:Monosaccharide Transport Proteins / Q000737:chemistry / Q000235:genetics*; D005810:Multigene Family; D017386:Sequence Homology, Amino Acid; D014158:Transcription, Genetic
chemical_list: D018076:DNA, Complementary; D051246:Glucose Transport Proteins, Facilitative; D009004:Monosaccharide Transport Proteins; C439386:SLC2A11 protein, human