We have evaluated the dioxygen binding properties of albumin hybrid incorporating porphyrinatoirons having histidine derivative [FeP(His), FeP(MHis)]. They were synthesized via 9 steps from 5,10,15,20-tetrakis(o- aminophenyl)porphyrin. FeP(His) binds histidine and FeP(MHis) binds 1-methylhistidine as a proximal base. Both hemes could be incorporated into human serum albumin (HSA) providing HSA hybrid [HSA-FeP(His) or HSA-FeP(MHis)] in the buffer solution (pH 7.3). HSA-FeP(MHis) showed a low O 2-binding affinity (P50: 15 Torr) and a high O 2-dissociation rate constant in comparison to HSA-FeP(His). This is due to the steric hindrance for the coordination of the proximal base derived from the methylene group at 4-posititon of imidazole ring in FeP(MHis). HSA-FeP(MHis) can be utilized as a new artificial O2-therapeutics.
|出版ステータス||Published - 2006 12 1|
|イベント||55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan|
継続期間: 2006 9 20 → 2006 9 22
|Other||55th Society of Polymer Science Japan Symposium on Macromolecules|
|Period||06/9/20 → 06/9/22|
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