| Literature DB >> 18630930 |
Jun Yi1, Martin K Safo, George B Richter-Addo.
Abstract
The nitrite anion is known to oxidize and degrade hemoglobin (Hb). Recent literature reports suggest a nitrite reductase activity for Hb, converting nitrite into nitric oxide. Surprisingly, no structural information about Hb-nitrite interactions has been reported. We have determined the crystal structure of the ferric Hb-nitrite complex at 1.80 A resolution. The nitrite ligand adopts the uncommon O-nitrito binding mode. In addition, the nitrito conformations in the alpha and beta subunits are different, reflecting subtle effects of the distal His in orienting the nitrite ligand in the O-nitrito binding mode.Entities:
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Year: 2008 PMID: 18630930 DOI: 10.1021/bi801015c
Source DB: PubMed Journal: Biochemistry ISSN: 0006-2960 Impact factor: 3.162