| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9141681 | Molecular Immunology | 2005 | 9 Pages |
Abstract
Complete porcine CD3ζ-chain cDNA sequence was obtained for the first time, and its genomic nucleotide sequence was investigated from exon 2 down to CD3η-chain exon 8. The sequence of porcine CD3ζ-chain showed homologous amino acid sequence with human and murine counterparts, in contrast to CD3η-chain exon 8 with diversity among animals previously investigated. CD3η-chain peptide is an alternative splice form of CD3ζ-chain exon 7 splicing to CD3η-chain exon 8 instead of CD3ζ-chain exon 8. The genomic sequences revealed that the splice acceptor sequences of CD3η-chain exon 8 of all animals investigated to be completely uniform. Further, CD3η-chain exon 8 amino acid sequences retained the unique characters of having high proline (Pro) and positively charged amino acid content except for rats and mice. Although the biological role of CD3η-chain remains to be enigmatic, these evidences suggests the evolutional pressure to maintain its sequence.
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Authors
Ryuji Yamamoto, Tamaki Isobe, Tomoko Eguchi, Wei-Ran Tang, Nobutaka Kiyokawa, Hiroshi Amemiya, Junichiro Fujimoto, Eimei Sato, Yohtaroh Takagaki, Hiroshi Yasue,