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Structure and expression of two highly related genes encoding SCM-1/human lymphotactin
Ist Teil von
FEBS letters, 1996-10, Vol.395 (1), p.82-88
Ort / Verlag
England: Elsevier B.V
Erscheinungsjahr
1996
Link zum Volltext
Quelle
Free E-Journal (出版社公開部分のみ)
Beschreibungen/Notizen
SCM-1/lymphotactin is a chemokine-like molecule produced selectively, if not exclusively, by activated CD8
+ T cells. Here we report that there are two highly homologous SCM-1 genes, which we designate as
SCM-1α and
SCM-1β. Both genes have three exons and two introns. The 1st intron of
SCM-1α contains a pseudogene of the ribosomal large subunit L7a. In
SCM-1β, a 1.5-kb region including about a quarter of the
L7a pseudogene is deleted from the 1st intron. Otherwise, the two genes are highly homologous including the 5′ and 3′ flanking regions. Both genes were mapped to human chromosome 1q23. The two genes were similarly induced in peripheral blood mononuclear cells by mitogenic stimulation. Primer extension and RNase protection revealed several transcription initiation sites. The biological activities of SCM-1α and SCM-1β, which have two amino acid differences at positions 7 and 8 in the mature proteins, remain to be compared.