Structural mechanism of tapasin-mediated MHC-I peptide loading in antigen presentation.
Structural mechanism of tapasin-mediated MHC-I peptide loading in antigen presentation.
复制标题
DOI:
10.1038/s41467-022-33153-8
复制
发表时间:
2022-09-17
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Loading of MHC-I molecules with peptide by the catalytic chaperone tapasin in the peptide loading complex plays a critical role in antigen presentation and immune recognition. Mechanistic insight has been hampered by the lack of detailed structural information concerning tapasin–MHC-I. We present here crystal structures of human tapasin complexed with the MHC-I molecule HLA-B*44:05, and with each of two anti-tapasin antibodies. The tapasin-stabilized peptide-receptive state of HLA-B*44:05 is characterized by distortion of the peptide binding groove and destabilization of the β2-microglobulin interaction, leading to release of peptide. Movements of the membrane proximal Ig-like domains of tapasin, HLA-B*44:05, and β2-microglobulin accompany the transition to a peptide-receptive state. Together this ensemble of crystal structures provides insights into a distinct mechanism of tapasin-mediated peptide exchange. The catalytic chaperone tapasin assists peptide loading onto MHC-I molecules for antigen presentation and immune recognition. Here, the authors present crystal structures that provide insights into the molecular mechanism of tapasin-mediated peptide exchange.
登录
查看更多内容
影响因子:
32.4
作者:
Dong, Gang;Wearsch, Pamela A.;Peaper, David R.;Cresswell, Peter;Reinisch, Karin M.
通讯作者:
Reinisch, Karin M.
影响因子:
3.7
作者:
Abualrous ET;Saini SK;Ramnarayan VR;Ilca FT;Zacharias M;Springer S
通讯作者:
Springer S
影响因子:
64.8
作者:
Jumper J;Evans R;Pritzel A;Green T;Figurnov M;Ronneberger O;Tunyasuvunakool K;Bates R;Žídek A;Potapenko A;Bridgland A;Meyer C;Kohl SAA;Ballard AJ;Cowie A;Romera-Paredes B;Nikolov S;Jain R;Adler J;Back T;Petersen S;Reiman D;Clancy E;Zielinski M;Steinegger M;Pacholska M;Berghammer T;Bodenstein S;Silver D;Vinyals O;Senior AW;Kavukcuoglu K;Kohli P;Hassabis D
通讯作者:
Hassabis D
DOI:
10.1073/pnas.2013554117
发表时间:
2020-11-10
影响因子:
11.1
作者:
Bashirova AA;Viard M;Naranbhai V;Grifoni A;Garcia-Beltran W;Akdag M;Yuki Y;Gao X;O'hUigin C;Raghavan M;Wolinsky S;Bream JH;Duggal P;Martinson J;Michael NL;Kirk GD;Buchbinder SP;Haas D;Goedert JJ;Deeks SG;Fellay J;Walker B;Goulder P;Cresswell P;Elliott T;Sette A;Carlson J;Carrington M
通讯作者:
Carrington M
影响因子:
16.6
作者:
Lan H;Abualrous ET;Sticht J;Fernandez LMA;Werk T;Weise C;Ballaschk M;Schmieder P;Loll B;Freund C
通讯作者:
Freund C