Post-translational modifications of immunoglobulin G:: a mouse IgG variant that lacks the entire CH1 domain

被引:6
|
作者
Masuda, K [1 ]
Yamaguchi, Y
Kato, K
Kim, H
Takahashi, N
Shimada, I
Arata, Y
机构
[1] Suntory Inst Bioorgan Res, Shimamoto, Osaka 6188503, Japan
[2] Meijo Univ, Fac Pharm, Tempaku Ku, Nagoya, Aichi 4688503, Japan
[3] Univ Tokyo, Grad Sch Pharmaceut Sci, Bunkyo Ku, Tokyo 1130033, Japan
[4] Nakano Vinegar Co Ltd, Glyco Lab, Aichi 4758586, Japan
[5] Water Res Inst, Tsukuba, Ibaraki 3050047, Japan
关键词
IgG; hinge region; post-translational modification; O-glycosylation; mass spectrometry;
D O I
10.1016/S0161-5890(99)00131-5
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
In the present study, we characterized the post-translational modifications of a short-chain variant of mouse IgG2a that lacks the entire C(H)1 domain. The short-chain IgG2a and its proteolytic fragments were subjected to electrosplay ionization- and fast atom bombardment-mass spectrometric analyses. It has been demonstrated that approximately 14% of the heavy chain of the short-chain IgG2a is O-glycosylated with a disaccharide of Gal-GalNAc- at Thr220A in the hinge region, while the O-glycosylation does not occur in its parent IgG2a molecule. Two additional modifications have been detected at the C-termini of both the heavy and light chains of the short-chain IgG2a. Biological significance of the post-translational modifications of the short-chain IgG2a variant is briefly discussed. (C) 2000 Elsevier Science Ltd. AU rights reserved.
引用
收藏
页码:993 / 1003
页数:11
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