A high-resolution structure of the EF-hand domain of human polycystin-2.
A high-resolution structure of the EF-hand domain of human polycystin-2.
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DOI:
10.1002/pro.2513
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发表时间:
2014-09
期刊:
影响因子:
8
通讯作者:
Bycroft, Mark
中科院分区:
文献类型:
--
作者:
Allen, Mark D.;Qamar, Seema;Vadivelu, Murali K.;Sandford, Richard N.;Bycroft, Mark
Autosomal dominant polycystic kidney disease (ADPKD) affects over 1:1000 of the worldwide population and is caused by mutations in two genes, PKD1 and PKD2. PKD2 encodes a 968-amino acid membrane spanning protein, Polycystin-2 (PC-2), which is a member of the TRP ion channel family. The C-terminal cytoplasmic tail contains an EF-hand motif followed by a short coiled-coil domain. We have determined the structure of the EF-hand region of PC-2 using NMR spectroscopy. The use of different boundaries, compared with those used in previous studies, have enabled us to determine a high resolution structure and show that the EF hand motif forms a standard calcium-binding pocket. The affinity of this pocket for calcium has been measured and mutants that both decrease and increase its affinity for the metal ion have been created.
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