12/2001 - Effect of ibuprofen and warfarin on the allosteric properties of haem-human serum albumin. A spectroscopic study
Haem binding to human serum albumin (HSA) endows the protein with peculiar spectroscopic properties. Here, the effect of ibuprofen and warfarin on the spectroscopic properties of ferric haem-human serum albumin (ferric HSA-haem) and of ferrous nitrosylated haem-human serum albumin (ferrous HSA-haem-NO) is reported. Ferric HSA-haem is hexa-coordinated, the haem-iron atom being bonded to His105 and […]
06/2001 - Relaxometric characterization of human hemalbumin
Hemalbumin [i.e., Fe(III)-protoporphyrin IX-human serum albumin; Fe(III)heme-HSA] is an important intermediate in the recovery of heme iron following hemolysis. Relaxometric data are consistent with the occurrence of a hexacoordinated high-spin Fe(III) center with no water in the inner coordination sphere. The relatively high relaxation enhancement observed for an aqueous solution of Fe(III)heme-HSA (r1p=4.8 mM(-1)s(-1) at […]
04/2001 - Effect of bezafibrate and clofibrate on the heme-iron geometry of ferrous nitrosylated heme-human serum albumin: an EPR study
The effect of bezafibrate (BZF) and clofibrate (CF), two therapeutic drugs displaying anticoagulant and antihyperlipoproteinemic activities, on the EPR-spectroscopic properties of ferrous nitrosylated heme-human serum albumin (HSA-heme-NO) has been investigated. In the absence of BZF and CF, HSA-heme-NO is a five-coordinate heme-iron system, characterised by an X-band EPR spectrum with a three-line splitting in the […]
08/1999 - Oligomeric Complexes Link Rab5 Effectors with NSF and Drive Membrane Fusion via Interactions between EEA1 and Syntaxin 13
SNAREs and Rab GTPases cooperate in vesicle transport through a mechanism yet poorly understood. We now demonstrate that the Rab5 effectors EEA1 and Rabaptin-5/Rabex-5 exist on the membrane in high molecular weight oligomers, which also contain NSF. Oligomeric assembly is modulated by the ATPase activity of NSF. Syntaxin 13, the t-SNARE required for endosome fusion, […]
02/1999 - The Rab5 effector EEA1 is a core component of endosome docking
Intracellular membrane docking and fusion requires the interplay between soluble factors and SNAREs. The SNARE hypothesis1 postulates that pairing between a vesicular v-SNARE and a target membrane z-SNARE is the primary molecular interaction underlying the specificity of vesicle targeting as well as lipid bilayer fusion. This proposal is supported by recent studies using a minimal artificial […]
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