title: The mouse gene Ptprf encoding the leukocyte common antigen-related molecule LAR: cloning, characterization, and chromosomal localization.
abstract: The human receptor-like protein tyrosine phosphatase leukocyte common antigen-related molecule (LAR; gene symbol PTPRF) closely resembles cell adhesion molecules, which suggests that it may be involved in the regulation of phosphotyrosine levels through cell-cell or cell-matrix interactions. To obtain a better understanding of LAR function, we have characterized the mouse Ptprf gene as a first step toward site-directed mutagenesis studies in vitro and in vivo. The cytoplasmic region of the mouse LAR (mLAR) protein is encoded by 11 exons that span only 4.5 kb of genomic DNA. Compared to the known exon-intron structures of other mammalian receptor-like protein tyrosine phosphatase genes, such as Ptpra (encoding LRP) and Ptprc (coding for Ly-5), the Ptprf gene part encoding the cytoplasmic region of mLAR contains not only smaller, but also fewer introns. Sequence analysis of both phosphatase domains of mLAR and its homologs MPTP delta and mRPTP sigma revealed a higher evolutionary conservation of the second, C-terminal domain in comparison to the first domain. Fluorescence in situ hybridization was used to map the Ptprf gene to region C6-D1 on mouse chromosome 4.
authors.affiliation: Department of Cell Biology, University of Nijmegen, The Netherlands.
authors.forename: R Q
authors.initials: RQ
authors.lastname: Schaapveld
authors.forename: A M
authors.initials: AM
authors.lastname: van den Maagdenberg
authors.forename: J T
authors.initials: JT
authors.lastname: Schepens
authors.forename: D O
authors.initials: DO
authors.lastname: Weghuis
authors.forename: A
authors.initials: A
authors.lastname: Geurts van Kessel
authors.forename: B
authors.initials: B
authors.lastname: Wieringa
authors.forename: W J
authors.initials: WJ
authors.lastname: Hendriks
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002874:Chromosome Mapping; D005796:Genes; D006801:Humans; D008565:Membrane Proteins / Q000737:chemistry / Q000235:genetics* / Q000502:physiology; D051379:Mice / Q000235:genetics*; D008969:Molecular Sequence Data; D005810:Multigene Family; D010802:Phylogeny; D017434:Protein Structure, Tertiary; D017027:Protein Tyrosine Phosphatases / Q000737:chemistry / Q000235:genetics* / Q000502:physiology; D051381:Rats; D054630:Receptor-Like Protein Tyrosine Phosphatases, Class 4; D011956:Receptors, Cell Surface / Q000737:chemistry / Q000235:genetics* / Q000502:physiology; D015398:Signal Transduction / Q000502:physiology; D013045:Species Specificity
chemical_list: D008565:Membrane Proteins; D011956:Receptors, Cell Surface; C516841:PTPRA protein, human; D017027:Protein Tyrosine Phosphatases; C516843:Ptpra protein, mouse; C516845:Ptpra protein, rat; D054630:Receptor-Like Protein Tyrosine Phosphatases, Class 4