Extended Hormone Binding Site of the Human Thyroid Stimulating Hormone Receptor
Extended Hormone Binding Site of the Human Thyroid Stimulating Hormone Receptor
复制标题
人甲状腺刺激激素受体的扩展激素结合位点
DOI:
--
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发表时间:
2008
影响因子:
4.8
通讯作者:
G. Krause
中科院分区:
文献类型:
--
作者:
Sandra M. Mueller;G. Kleinau;H. Jaeschke;R. Paschke;G. Krause
The human thyroid stimulating hormone receptor (hTSHR) belongs to the glycoprotein hormone receptors that bind the hormones at their large extracellular domain. The extracellular hinge region of the TSHR connects the N-terminal leucine-rich repeat domain with the membrane-spanning serpentine domain. From previous studies we reasoned that apart from hormone binding at the leucine-rich repeat domain, additional multiple hormone contacts might exist at the hinge region of the TSHR by complementary charge-charge recognition. Here we investigated highly conserved charged residues in the hinge region of the TSHR by site-directed mutagenesis to identify amino acids interacting with bovine TSH (bTSH). Indeed, the residues Glu-297, Glu-303, and Asp-382 in the TSHR hinge region are essential for bTSH binding and partially for signal transduction. Side chain substitutions showed that the negative charge of Glu-297 and Asp-382 is necessary for recognition of bTSH by the hTSHR. Multiple combinations of alanine mutants of the identified positions revealed an increased negative effect on hormone binding. An assembled model suggests that the deciphered acidic residues form negatively charged patches at the hinge region resulting in an extended binding mode for bTSH on the hTSHR. Our data indicate that certain positively charged residues of bTSH might be involved in interaction with the identified negatively charged amino acids of the hTSHR hinge region. We demonstrate that the hinge region represents an extracellular intermediate connector for both hormone binding and signal transduction of the hTSHR.
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影响因子:
4.8
作者:
Dallas,JS;Desai,RK;Cunningham,SJ;Morris,JC;Seetharamaiah,GS;Wagle,N;Goldblum,RM;Prabhakar,BS
通讯作者:
Prabhakar,BS
DOI:
10.1073/pnas.88.3.902
发表时间:
1991
影响因子:
11.1
作者:
Nagayama,Y;Wadsworth,HL;Chazenbalk,GD;Russo,D;Seto,P;Rapoport,B
通讯作者:
Rapoport,B
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Morris,JC;Bergert,ER;McCormick,DJ
通讯作者:
McCormick,DJ
DOI:
10.1210/mend-5-1-29
发表时间:
1991
期刊:
Molecular endocrinology (Baltimore, Md.)
影响因子:
--
作者:
Russo,D;Chazenbalk,GD;Nagayama,Y;Wadsworth,HL;Rapoport,B
通讯作者:
Rapoport,B
DOI:
10.1210/endo.138.7.5259
发表时间:
1997
期刊:
Endocrinology.
影响因子:
--
作者:
Chazenbalk,GD;Tanaka,K;Nagayama,Y;Kakinuma,A;Jaume,JC;McLachlan,SM;Rapoport,B
通讯作者:
Rapoport,B