Activating Ly-49D and inhibitory Ly-49A natural killer cell receptors demonstrate distinct requirements for interaction with H2-D(d).
Activating Ly-49D and inhibitory Ly-49A natural killer cell receptors demonstrate distinct requirements for interaction with H2-D(d).
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DOI:
10.1084/jem.192.3.447
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发表时间:
2000-08-07
期刊:
影响因子:
--
通讯作者:
Seaman WE
中科院分区:
文献类型:
--
作者:
Nakamura MC;Hayashi S;Niemi EC;Ryan JC;Seaman WE
The activating Ly-49D receptor and the inhibitory Ly-49A receptor mediate opposing effects on natural killer (NK) cell cytotoxicity after interaction with the same major histocompatibility complex ligand, H2-Dd. To compare Ly-49D and Ly-49A interactions with H2-Dd, we created mutations in H2-Dd and examined the functional ability of these mutants to activate lysis through Ly-49D or to inhibit lysis through Ly-49A. Specific single amino acid changes in either the H2-Dd α1 helix or the α2 helix abrogated Ly-49D–mediated cytotoxicity, but these changes had no significant effect on Ly-49A–dependent inhibition. Each of three α2 domain mutations in the floor of the peptide binding groove reduced functional recognition by either Ly-49D or Ly-49A, but all three were required to fully abrogate inhibition by Ly-49A. Our studies indicate that Ly-49D/H2-Dd interactions require distinct determinants compared with Ly-49A/H2-Dd interactions. These differences have important implications for the integration of activating and inhibitory signals in NK cells.
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DOI:
10.1073/pnas.93.21.11792
发表时间:
1996-10-15
影响因子:
11.1
作者:
Orihuela, M;Margulies, DH;Yokoyama, WM
通讯作者:
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DOI:
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影响因子:
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影响因子:
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作者:
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通讯作者:
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影响因子:
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