著者

大西 康雄 大西 康雄 OHNISHI Yasuo オオニシ ヤスオ Onishi Yasuo

出版者

山梨県立大学

雑誌

山梨国際研究 山梨県立大学国際政策学部紀要 = Yamanashi glocal studies : bulletin of Faculty of Glocal Policy Management and Communications (ISSN:21874336)

巻号頁・発行日

no.9, pp.11-24, 2014

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McLuhan's "Understanding Media" is well known for its difficulty in understanding. Especially his concept of "hot / cool" medium is central symbol of difficulty and ambiguity of the book. In this article, I try to restructure the concept for better understanding and application of McLuhan's thought. I try to decompose the concept to three conceptual dimensions. Its first dimension is the dimension of social context: openness of interpretation. Its second dimension is the dimension of medium format: displacement easiness of medium. Its third dimension is the dimension of synaesthesia. On the third dimension, I propose that we should treat it as completely different dimension from "hot / cool" concept.

著者

Ohnishi Yasuo Beppu Teruhiko Horinouchi Sueharu

出版者

The Japanese Biochemical Society

雑誌

The Journal of Biochemistry (ISSN:0021924X)

巻号頁・発行日

vol.121, no.5, pp.902-913, 1997

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A serine protease (SSP) of <i>Serratia marcescens</i> is one of the extracellular enzymes secreted from this Gram-negative bacterium. SSP is produced as a large precursor and converted to a mature protein by cleavages removing an NH₂-terminal signal sequence and a COOH-terminal pro-region. This COOH-terminal pro-region is integrated into the outer membrane and has a functional role for the export of the mature protein across the outer membrane. Southern hybridization analysis with a DNA fragment encoding the COOH-terminal pro-region as the probe showed a wide distribution of nucleotide sequences encoding SSP exporter-like proteins among <i>Serratia</i> species. Moreover, S. marcescens IFO 3046, from which the ssp gene had been cloned, was found to contain two ssp homologues (<i>ssp-h1</i> and <i>ssp-h2</i>). They were cloned and their nucleotide sequences were determined. The two ssp homologues were found to exist in tandem on the genome and their amino acid sequences showed 81% identity to each other. Both of them showed 55% identity in amino acid sequence to preproSSP. In addition, both showed end-to-end similarity to the 100 kDa serotype-specific antigen (Ssa1) of Pasteurella haemolytica. Escherichia coli JM105 containing <i>ssp-h1</i> gene produced a 53 kDa protein corresponding to the NH₂terminal portion and a 49 kDa protein corresponding to the COOH-terminal portion, both of which were rigidly integrated in the outer membrane. Consistent with the significant similarity of the COOH-terminal portions of the homologues to that of SSP, they showed the ability to translocate the mature SSP part across the outer membrane into the medium. Furthermore, the NH₂-terminal portion of the homologue was not translocated into the outer membrane without its COOH-terminal part. All of these data show that the SSP homologues are outer membrane proteins that are translocated into the outer membrane with the aid of the translocator function of their COOH-terminal part.