Mitogen-inducible SIPA1 is mapped to the conserved syntenic groups of chromosome 19 in mouse and chromosome 11q13.3 centromeric to BCL1 in human

• Published in: Genomics (San Diego, Calif.) Vol. 39; no. 1; pp. 66 - 73
• Main Authors: WADA, Y, KUBOTA, H, MAEDA, M, TANIWAKI, M, HATTORI, M, IMAMURA, S, IWAI, K, MINATO, N
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier 1997
• Subjects: Animals; Biological and medical sciences; Centromere; Chromosome Mapping; Chromosomes, Human, Pair 11; Cloning, Molecular; Cyclin D1; Fundamental and applied biological sciences. Psychology; Genes. Genome; Genetic Markers; GTPase-Activating Proteins; Humans; In Situ Hybridization, Fluorescence; Mice; Molecular and cellular biology; Molecular genetics; Molecular Sequence Data; Nuclear Proteins - genetics; Proto-Oncogene Proteins - genetics; Genetic mapping; Chromosome 19; Human; Cell proliferation; Nucleotide sequence; Interspecific comparison; Rodentia; Homology; Gene organization; Chromosome C11; Vertebrata; Mammalia; Mouse; Domain structure; Chromosome DNA; Lymphocyte
• DOI: 10.1006/geno.1996.4464
• ISSN: 0888-7543

Sipa1, previously called Spa1, is transcriptionally induced in the murine lymphoid cells following mitogenic stimulation and encodes a protein with a domain related to Rap1 GTPase activating protein (Rap1GAP) at the N-terminus and to PEST sequences followed by a leucine zipper motif at the C-terminus. Herein mouse genomic Sipa1, which consisted of 16 exons, was cloned. Gene linkage analysis using (BXD) recombinant inbred strains indicated that Sipa1 was mapped to the most centromeric region of chromosome 19 syntenic with the long arm of human chromosome 11. Human SIPA1 cDNA exhibited a striking homology to that of mouse throughout the entire region, with the overall identity being 90% at the amino acid level. Human genomic clones, which hybridized with both mouse and human SIPA1 cDNA but not with RAP1GAP cDNA, were then isolated. Fluorescence in situ hybridization (FISH) analysis using the human genomic clones indicated that SIPA1 was indeed mapped to chromosome 11q13, most likely to the 11q13.3 subregion. It was further indicated by double-color FISH that SIPA1 was located in the centromeric neighborhood of CCND1/ PRAD1, a presumed BCL1 oncogene.