Newly Determined Carboxy Terminal Sequences in Tropoelastin: Immunologic Identification in Insoluble Elastin

Joel Rosenbloom , George Weinbaum , William Abrams , Norma Ornsten-Goldstein , Zena Indik , Umberto Kucich
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引用次数: 16

Abstract

The carboxy terminal sequence of sheep, bovine and human tropoelastin (GFPGGACLGKA/SCGRKRK) has been inferred in earlier studies from sequencing of cloned complementary and genomic DNA. However, this putative carboxy terminal sequence was not found previously in peptides recovered from tryptic digests of tropoelastin. In order to determine whether the amino acid sequence described above is found in insoluble elastin, antibodies were raised against the chemically synthesized peptides with the appropriate sequences and the antibodies were shown to react with peptides derived from human, bovine, porcine, dog and hamster insoluble elastins. These results strongly suggest that the sequence (GFPGGACLGKA/SCGRKRK) at the carboxy terminus of tropoelastin is found in the elastins of many species.

新测定的弹力蛋白羧基末端序列:不溶性弹力蛋白的免疫鉴定
羊、牛和人tropoelastin的羧基末端序列(GFPGGACLGKA/SCGRKRK)已经在早期的研究中从克隆的互补DNA和基因组DNA测序中推断出来。然而,这个假定的羧基末端序列以前没有在从对弹力蛋白的胰蛋白酶消化中恢复的肽中发现。为了确定上述氨基酸序列是否存在于不溶性弹性蛋白中,对化学合成的具有适当序列的肽产生抗体,结果表明抗体与来自人、牛、猪、狗和仓鼠的不溶性弹性蛋白的肽反应。这些结果强烈表明,在许多物种的弹性蛋白中都存在tropoelastin羧基末端的序列(GFPGGACLGKA/SCGRKRK)。
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