title: Genomic organization and chromosomal localization of the mouse telencephalin gene, a neuronal member of the ICAM family.
abstract: Telencephalin is a cell adhesion molecule belonging to the immunoglobulin (Ig) superfamily, whose expression is restricted to subsets of neurons in the telencephalon, the most rostral segment of brain. Of all the Ig superfamily molecules so far identified, the structure of telencephalin is most closely related to those of intercellular adhesion molecules (ICAMs)-1 and -3. Here we report the cloning, characterization, and chromosomal localization of the mouse telencephalin gene (Tlcn). The Tlcn gene spanned about 6.3 kb and consisted of 11 exons. A signal peptide and individual nine Ig-like domains of telencephalin were encoded by a single exon, while the transmembrane and cytoplasmic regions were fused in a same exon. The primer extension technique was used to establish that the transcription initiation sites were located 92-95 bp upstream from the ATG start codon. DNA sequencing of the 5'-flanking region revealed the presence of a strong initiator element for TATA-less genes, two CAAT boxes, and numerous potential transcription factor binding sites including four E-box and two N-box sequences. Interspecific backcross analysis demonstrated that the Tlcn gene was mapped in the proximal region of mouse chromosome 9 in close vicinity to the Icam-1 gene, suggesting that Tlcn and Icam-1 are derived from a common ancestral gene by gene duplication.
authors.affiliation: Laboratory for Neuronal Recognition Molecules, Frontier Research Program, RIKEN, Wako, Saitama, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Sugino
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshihara
authors.forename: N G
authors.initials: NG
authors.lastname: Copeland
authors.forename: D J
authors.initials: DJ
authors.lastname: Gilbert
authors.forename: N A
authors.initials: NA
authors.lastname: Jenkins
authors.forename: K
authors.initials: K
authors.lastname: Mori
mesh_terms: D000818:Animals; D001483:Base Sequence; D001665:Binding Sites; D015815:Cell Adhesion Molecules / Q000737:chemistry / Q000235:genetics*; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D003433:Crosses, Genetic; D017931:DNA Primers; D019143:Evolution, Molecular; D005091:Exons / Q000235:genetics; D007438:Introns / Q000235:genetics; D008562:Membrane Glycoproteins / Q000737:chemistry / Q000235:genetics*; D051379:Mice; D008969:Molecular Sequence Data; D009419:Nerve Tissue Proteins / Q000737:chemistry / Q000235:genetics*; D012326:RNA Splicing; D012333:RNA, Messenger / Q000737:chemistry / Q000235:genetics; D017422:Sequence Analysis, DNA; D014157:Transcription Factors / Q000235:genetics
chemical_list: D015815:Cell Adhesion Molecules; D017931:DNA Primers; C504585:Icam5 protein, mouse; D008562:Membrane Glycoproteins; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger; D014157:Transcription Factors