A limulus intracellular coagulation inhibitor type 2: Purification, characterization, cDNA cloning, and tissue localization

Yoshiki Miura, Shun-Ichiro Kawabata, Yukako Wakamiya, Takanori Nakamura, Sadaaki Iwanaga

研究成果: ジャーナルへの寄稿記事

59 引用 (Scopus)

抄録

We described in a foregoing report findings on serpin, a serine protease inhibitor, newly identified in horseshoe crab (Tachypleus tridentatus) hemocytes and we name it limulus intracellular coagulation inhibitor, LICI (Miura, Y., Kawabata, S., and Iwanaga, S. (1994) J. Biol. Chem. 269, 542-547). This serpin specifically inhibits limulus lipopolysaccharide-sensitive serine protease, factor C̄. In ongoing studies on limulus serpin, we have found another inhibitor, LICI type-2 (LICI-2), which inhibits not only factor C̄ (k1 = 7.1 × 104 M-1 s-1) but also limulus clotting enzyme (k1 = 4.3 × 105 M-1 s-1). LICI-2 inhibits mammalian serine proteases, including α-thrombin, salivary kallikrein, plasmin, and tissue plasminogen activator. The inactivation of plasmin is the most rapid (k1 = 1.2 × 106 M-1 s-1). The purified LICI-2 is a single chain glycoprotein with an apparent Mr. = 42,000. A cDNA for LICI-2 was isolated and the open reading frame coded for a mature protein of 386 amino acids, of which 160 residues were confirmed by peptide sequencing. Although LICI-2 shows significant sequence similarity to the previous limulus serpin, LICI-1 (42% identity), LICI-2 contains a unique putative reactive site, -Lys-Ser-, distinct from that of LICI-1 (-Arg-Ser-). Northern blotting revealed expression of LICI-2 mRNA only in hemocytes, and not in heart, brain, stomach, intestine, coxal gland, and skeletal muscle. The immunoblot of large and small granule components with antiserum against purified LICI-2 suggests that LICI-2 is stored specifically in large granules, as in the case of LICI-1, and is released in response to external stimuli. We propose that the LICIs be classified into a new subfamily of intracellular serpins, regulated secretory serpins.

元の言語英語
ページ(範囲)558-565
ページ数8
ジャーナルJournal of Biological Chemistry
270
発行部数2
DOI
出版物ステータス出版済み - 1 13 1995

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Serpins
Horseshoe Crabs
Cloning
Coagulation
Purification
Organism Cloning
Complementary DNA
Tissue
Fibrinolysin
Hemocytes
Serine Proteases
Kallikreins
Serine Proteinase Inhibitors
Tissue Plasminogen Activator
Thrombin
Lipopolysaccharides
Muscle
Immune Sera
Brain
Glycoproteins

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology
  • Cell Biology

これを引用

A limulus intracellular coagulation inhibitor type 2 : Purification, characterization, cDNA cloning, and tissue localization. / Miura, Yoshiki; Kawabata, Shun-Ichiro; Wakamiya, Yukako; Nakamura, Takanori; Iwanaga, Sadaaki.

:: Journal of Biological Chemistry, 巻 270, 番号 2, 13.01.1995, p. 558-565.

研究成果: ジャーナルへの寄稿記事

Miura, Yoshiki ; Kawabata, Shun-Ichiro ; Wakamiya, Yukako ; Nakamura, Takanori ; Iwanaga, Sadaaki. / A limulus intracellular coagulation inhibitor type 2 : Purification, characterization, cDNA cloning, and tissue localization. :: Journal of Biological Chemistry. 1995 ; 巻 270, 番号 2. pp. 558-565.
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abstract = "We described in a foregoing report findings on serpin, a serine protease inhibitor, newly identified in horseshoe crab (Tachypleus tridentatus) hemocytes and we name it limulus intracellular coagulation inhibitor, LICI (Miura, Y., Kawabata, S., and Iwanaga, S. (1994) J. Biol. Chem. 269, 542-547). This serpin specifically inhibits limulus lipopolysaccharide-sensitive serine protease, factor C̄. In ongoing studies on limulus serpin, we have found another inhibitor, LICI type-2 (LICI-2), which inhibits not only factor C̄ (k1 = 7.1 × 104 M-1 s-1) but also limulus clotting enzyme (k1 = 4.3 × 105 M-1 s-1). LICI-2 inhibits mammalian serine proteases, including α-thrombin, salivary kallikrein, plasmin, and tissue plasminogen activator. The inactivation of plasmin is the most rapid (k1 = 1.2 × 106 M-1 s-1). The purified LICI-2 is a single chain glycoprotein with an apparent Mr. = 42,000. A cDNA for LICI-2 was isolated and the open reading frame coded for a mature protein of 386 amino acids, of which 160 residues were confirmed by peptide sequencing. Although LICI-2 shows significant sequence similarity to the previous limulus serpin, LICI-1 (42{\%} identity), LICI-2 contains a unique putative reactive site, -Lys-Ser-, distinct from that of LICI-1 (-Arg-Ser-). Northern blotting revealed expression of LICI-2 mRNA only in hemocytes, and not in heart, brain, stomach, intestine, coxal gland, and skeletal muscle. The immunoblot of large and small granule components with antiserum against purified LICI-2 suggests that LICI-2 is stored specifically in large granules, as in the case of LICI-1, and is released in response to external stimuli. We propose that the LICIs be classified into a new subfamily of intracellular serpins, regulated secretory serpins.",
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AU - Iwanaga, Sadaaki

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