KDN糖蛋白：一种从虹鳟鱼卵卵黄膜中分离出的新型富含脱氨基神经氨酸的糖蛋白。
KDN-glycoprotein: a novel deaminated neuraminic acid-rich glycoprotein isolated from vitelline envelope of rainbow trout eggs.
作者信息
Inoue S, Kanamori A, Kitajima K, Inoue Y
机构信息
School of Pharmaceutical Sciences, Showa University, Tokyo, Japan.
出版信息
Biochem Biophys Res Commun. 1988 May 31;153(1):172-6. doi: 10.1016/s0006-291x(88)81204-x.
A new acidic glycoprotein containing deaminated neuraminic acid (KDN = 3-deoxy-D-glycero-D-galacto-nonulosonic acid; greater than 50%, w/w) was isolated from vitelline envelope of the unfertilized eggs of rainbow trout (Salmo gairdneri). This glycoprotein is designated as "KDN-glycoprotein" because it contains only KDN but no sialic acid as the acidic carbohydrate moieties. Other major carbohydrate components of KDN-glycoprotein were Gal and GalNAc. Thr and Ala accounted for 71% (mol/mol) of amino acid composition. A possible occurrence of KDN-KDN linkages, i.e. oligoKDN groups has been suggested in the carbohydrate chains presumably linked O-glycosidically to the core protein.
从虹鳟（Salmo gairdneri）未受精卵的卵黄膜中分离出一种新的酸性糖蛋白，该糖蛋白含有脱氨基神经氨酸（KDN = 3-脱氧-D-甘油-D-半乳糖-壬酮糖醛酸；大于50%，重量/重量）。这种糖蛋白被命名为“KDN-糖蛋白”，因为它仅含有KDN，而没有唾液酸作为酸性碳水化合物部分。KDN-糖蛋白的其他主要碳水化合物成分是半乳糖（Gal）和N-乙酰半乳糖胺（GalNAc）。苏氨酸（Thr）和丙氨酸（Ala）占氨基酸组成的71%（摩尔/摩尔）。据推测，碳水化合物链中可能存在KDN-KDN连接，即低聚KDN基团，它们可能通过O-糖苷键与核心蛋白相连。
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