Prasuhn DE, Kuzelka J, Strable E, Udit AK, Cho SH, Lander GC, Quispe JD, Diers JR, Bocian DF, Potter C, Carragher B, Finn MG. Polyvalent display of heme on hepatitis B virus capsid protein through coordination to hexahistidine tags.
ACTA ACUST UNITED AC 2008;
15:513-9. [PMID:
18482703 DOI:
10.1016/j.chembiol.2008.03.018]
[Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2007] [Revised: 03/17/2008] [Accepted: 03/18/2008] [Indexed: 10/22/2022]
Abstract
The addition of a hexahistidine tag to the N terminus of the hepatitis B capsid protein gives rise to a self-assembled particle with 80 sites of high local density of histidine side chains. Iron protoporphyrin IX has been found to bind tightly at each of these sites, making a polyvalent system of well-defined spacing between metalloporphyrin complexes. The spectroscopic and redox properties of the resulting particle are consistent with the presence of 80 site-isolated bis(histidine)-bound heme centers, comprising a polyvalent b-type cytochrome mimic.
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