Heparanases Produce Distinct Populations of Heparan Sulfate Glycosaminoglycans in Chinese Hamster Ovary Cells*
Heparanases Produce Distinct Populations of Heparan Sulfate Glycosaminoglycans in Chinese Hamster Ovary Cells*
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乙酰肝素酶在中国仓鼠卵巢细胞中产生不同的硫酸乙酰肝素糖胺聚糖群体*
DOI:
--
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发表时间:
1997
影响因子:
4.8
通讯作者:
K. Robson
中科院分区:
文献类型:
--
作者:
K. Bame;K. Robson
Once internalized, cell-associated heparan sulfate proteoglycans are degraded to short glycosaminoglycans by the action of endoglycosidases or heparanases. We have begun to address the question of how many heparanases are responsible for this process by analyzing short heparan sulfate chains produced in vivo by Chinese hamster ovary (CHO) cell heparanases. Short heparan sulfate chains were purified from CHO cells and labeled at the reducing end with [3H]NaBH4. Hydrolysis of the chains to monosaccharides and analysis of the 3H-sugar alcohols indicate that heparanase activities in CHO cells are endo-β-glucuronidases. The modification state of the heparanase-derived glycosaminoglycans was examined by treating the [3H]heparan sulfate chains with nitrous acid or bacterial heparin lyases, which cut the chain at specific sequences, and analyzing the products by P2 gel filtration chromatography. Two populations of short chains were identified that differ in the extent of modification on the nonreducing side of the heparanase cleavage site. One class of chains is unmodified for at least 9 residues from the reducing end, while the other group has a modified domain within 3-7 residues from the heparanase cleavage site. Our results suggest a model of heparanase action where the enzymes recognize differences in sulfate content between modified and unmodified regions and bind to sites that encompass both domains. The enzymes then cleave the glycosaminoglycan at junctions between the modified and unmodified sequences to produce the different populations of short heparan sulfate chains.
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DOI:
10.1016/s0021-9258(17)43350-3
发表时间:
1984-02
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
M. Nakajima;T. Irimura;N. Ferrante;G. Nicolson
通讯作者:
M. Nakajima;T. Irimura;N. Ferrante;G. Nicolson
DOI:
10.1172/jci112104
发表时间:
1985-10
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
Y. Matzner;M. Bar‐Ner;J. Yahalom;R. Ishai‐Michaeli;Z. Fuks;I. Vlodavsky
通讯作者:
Y. Matzner;M. Bar‐Ner;J. Yahalom;R. Ishai‐Michaeli;Z. Fuks;I. Vlodavsky
DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Bame,KJ;Esko,JD
通讯作者:
Esko,JD
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Roghani,M;Moscatelli,D
通讯作者:
Moscatelli,D
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Bame,KJ
通讯作者:
Bame,KJ