Human tenascin-R: Complete primary structure, pre-mRNA alternative splicing and gene localization on chromosome 1q23-q24

Barbara Carnemolla, Alessandra Leprini, Laura Borsi, Germano Querzé, Stefania Urbini, Luciano Zardi

Research output: Contribution to journalArticlepeer-review

Abstract

We have established the primary structure of human tenascin-R (TN-R), a component of the extracellular matrix of the central nervous system, by sequencing cDNA clones which cover its complete coding region. The deduced amino acid sequence of human TN-R (1358 amino acids) showed a homology to chicken and rat TN-R of 75 and 93%, respectively. By reverse transcriptase-polymerase chain reaction we have studied the existence of TN-R isoforms generated by pre-mRNA alternative splicing in various human astrocytomas and meningiomas. Our findings demonstrate the existence of a human isoform in which one fibronectin-like repeat is omitted. Northern blot analysis of the poly(A)-rich RNA from different tissues showed two mRNAs having sizes of about 10 and 11 kilobases. Using DNA from a panel of human-hamster and human-mouse somatic cell hybrids and by fluorescence in situ hybridization, we have assigned the gene for human TN-R to the region 1q23-q24. The mouse mutation loop-tail (Lp), which has been proposed as a model for human neural tube defects, maps to region of mouse chromosome 1 syntenic with human 1q23-q24.

Original languageEnglish
Pages (from-to)8157-8160
Number of pages4
JournalJournal of Biological Chemistry
Volume271
Issue number14
Publication statusPublished - Apr 5 1996

ASJC Scopus subject areas

  • Biochemistry

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