Determination of the Site-specific Oligosaccharide Distribution of the O-Glycans Attached to the Porcine Submaxillary Mucin Tandem Repeat
Determination of the Site-specific Oligosaccharide Distribution of the O-Glycans Attached to the Porcine Submaxillary Mucin Tandem Repeat
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猪颌下粘蛋白串联重复序列上附着的 O-聚糖位点特异性寡糖分布的测定
DOI:
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发表时间:
2002
影响因子:
4.8
通讯作者:
Jiexin Zhang
中科院分区:
文献类型:
--
作者:
T. Gerken;Marcella A. Gilmore;Jiexin Zhang
Little is known of the degree that polypeptide sequence and the local environment modulate the structures ofO-linked glycans. Toward this understanding, the site-specific mono- (GalNAc-O-), di- (β-Gal-1,3-α-GalNAc-O-), and trisaccharide (α-Fuc-1,2-β-Gal-1,3-α-GalNAc-O-) distributions have been determined for 29 of the 31 O-glycosylated Ser/Thr residues in the tandem repeat domains of blood group A-negative porcine submaxillary gland mucin. The glycosylation patterns obtained from three individual animals are in agreement with earlier incomplete determinations on a pooled mucin (Gerken, T. A., Owens, C. L., and Pasumarthy, M. (1997) J. Biol. Chem. 272, 9709–9719; Gerken, T. A., Owens, C. L., and Pasumarthy, M. (1998) J. Biol. Chem. 273, 26580–26588), confirming that the addition of the peptide-linked GalNAc and its substitution by β-1,3-Gal are sensitive to local peptide sequence in a highly reproducible manner in vivo. The present data further support earlier suggestions of an inverse correlation of the density of hydroxyamino acid residues (and by inference the density of peptide GalNAc) with the extent of substitution of the peptide-linked GalNAc by β-1,3-Gal. This effect is highly correlated for Ser-linked glycans but not for Thr-linked glycans. A similar correlation is observed with respect to the in vivo peptide GalNAc glycosylation pattern. In contrast, the addition of α-1,2-Fuc to β-Gal shows no apparent correlation with hydroxyamino acid density, although a marked elevation in the fucosylation of Ser-linked glycans compared with Thr-linked glycans is observed. The above effects may represent both steric and conformational factors acting to alter the relative accessibility and activity of the glycosyltransferases toward substrate. These results demonstrate that the porcine submaxillary gland core 1 β3-galactosyltransferase and α2-fucosyltransferase exhibit unique peptide/glycopeptide sensitivities that may provide mechanisms for the modulation of O-linked side chain structures.
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影响因子:
3.9
作者:
Gerken,TA
通讯作者:
Gerken,TA
影响因子:
2.9
作者:
Butenhof,KJ;Gerken,TA
通讯作者:
Gerken,TA
DOI:
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发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Timpte,CS;Eckhardt,AE;Abernethy,JL;Hill,RL
通讯作者:
Hill,RL
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
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DOI:
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发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Do,KY;Fregien,N;Pierce,M;Cummings,RD
通讯作者:
Cummings,RD