Signal regulatory protein alpha (SIRPalpha)/CD47 interaction and function.
Signal regulatory protein alpha (SIRPalpha)/CD47 interaction and function.
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DOI:
10.1016/j.coi.2009.01.008
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发表时间:
2009-02
影响因子:
7
通讯作者:
Barclay AN
中科院分区:
文献类型:
--
作者:
Barclay AN
SIRPα is an inhibitory receptor present on myeloid cells that interacts with a widely distributed membrane protein CD47. The activating member SIRPβ, despite extensive sequence similarity to SIRPα in the extracellular region, shows negligible binding to CD47. The SIRPα / CD47 interaction is unusual in that it can lead to bidirectional signalling through both SIRPα and CD47. This review concentrates on the interactions of SIRPα with CD47 where recent data have shed light on the structure of the proteins including determining why the activating SIRPβ does not bind CD47, evidence of extensive polymorphisms and implication for the evolution and function of this protein and paired receptors in general. The interaction may be modified by endocytosis of the receptors, cleavage by proteolysis and through interactions of surfactant proteins.
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