Identification of Hyaluronan-binding Domains of Aggrecan*
Identification of Hyaluronan-binding Domains of Aggrecan*
复制标题
聚蛋白聚糖透明质酸结合域的鉴定*
DOI:
--
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发表时间:
1997
影响因子:
4.8
通讯作者:
Yoshihiko Yamada
中科院分区:
文献类型:
--
作者:
H. Watanabe;S. Cheung;N. Itano;K. Kimata;Yoshihiko Yamada
Aggrecan, a large cartilage proteoglycan, interacts with hyaluronan (HA), to form aggregates which function to resist compression in joints. The N-terminal region of aggrecan contains two structurally related globular domains, G1 and G2 separated by IGD domain. The G1 domain consists of three subdomains, A, B, and B′, structural features characteristic to many other HA-binding proteoglycans. Here, we studied the interaction of aggrecan domains with HA using recombinant proteins expressed in 293 cells, an embryonal kidney cell line. Deglycosylation of the recombinant aggrecan fragment reduced the HA binding activity. We found that both the B and B′ subdomains were required for HA binding and that a single module of A, B, or B′ was unable to bind HA. The A subdomain increased the HA binding activity of the B-B′ region. The G2 domain had no HA binding activity confirming previous reports. Studies of HA-binding properties using a BIAcoreTM biosensor system revealed that the K D of recombinant aggrecan fragment (AgW) consisting of G1, IGD, and G2 was 0.226 μm, whereas the K D of another HA-binding protein, native bovine link protein, is 0.089 μm. In contrast, AgMut11 which lacked subdomain A showed little HA binding activity. AgMut12 consisting of only B-B′ had a 3.4-fold lower affinity and AgMut13 containing A-B-B′ was 1.5-fold lower than AgW. These results suggest that carbohydrates are essential for high level aggrecan binding to HA and that the A subdomain of aggrecan functions in a cooperative manner with subdomains B and B′.
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DOI:
10.1002/j.1460-2075.1989.tb08447.x
发表时间:
1989-10
期刊:
The EMBO Journal
影响因子:
--
作者:
Dieter R. Zimmermann;E. Ruoslahti
通讯作者:
Dieter R. Zimmermann;E. Ruoslahti
影响因子:
3.9
作者:
Varelas,JB;Kollar,J;Huynh,TD;Hering,TM
通讯作者:
Hering,TM
DOI:
10.1016/s0021-9258(18)41808-x
发表时间:
1992-09
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Uwe Rauch;L. Karthikeyan;P. Maurel;R. U. Margolis;R. Margolis
通讯作者:
Uwe Rauch;L. Karthikeyan;P. Maurel;R. U. Margolis;R. Margolis
DOI:
--
发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Sandy,JD;Flannery,CR;Boynton,RE;Neame,PJ
通讯作者:
Neame,PJ
影响因子:
2.7
作者:
Yu,Q;Toole,BP
通讯作者:
Toole,BP