Title : Flavonoids as Protein Disulfide Isomerase Inhibitors: Key Molecular and Structural Features for the Interaction.

Pub. Date : 2022 Apr 13

PMID : 35377153






10 Functional Relationships(s)
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1 The finding that quercetin-3-rutinoside inhibits protein disulfide isomerase (PDI) and potently blocks thrombosis in vivo has enabled the evaluation of PDI inhibition in multiple animal models of thrombus formation and has prompted clinical studies of PDI inhibition in thrombosis. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
2 The finding that quercetin-3-rutinoside inhibits protein disulfide isomerase (PDI) and potently blocks thrombosis in vivo has enabled the evaluation of PDI inhibition in multiple animal models of thrombus formation and has prompted clinical studies of PDI inhibition in thrombosis. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
3 Nonetheless, how quercetin-3-rutinoside blocks PDI activity remains an unanswered question. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
4 Combining NMR spectroscopy, site-directed mutagenesis, and biological assays, we identified H256 as the key residue for PDI interacting with quercetin-3-rutinoside. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
5 Quercetin-3-rutinoside inhibited the activity of PDI (WT) but not PDI (H256A). Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
6 Among several quercetin-3-rutinoside analogues tested, only compounds with a phenoxyl group at position 7 showed direct binding to PDI, further supporting our molecular model. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
7 Studies using purified coagulation factors showed that quercetin-3-rutinoside inhibited the augmenting effects of PDI (WT), but not PDI (H256A), on tissue factor (TF) activity. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
8 Together, our studies show that residue H256 in PDI and the phenoxyl group at position 7 in quercetin-3-rutinoside are essential for inhibition of PDI by quercetin-3-rutinoside. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
9 Together, our studies show that residue H256 in PDI and the phenoxyl group at position 7 in quercetin-3-rutinoside are essential for inhibition of PDI by quercetin-3-rutinoside. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens
10 Together, our studies show that residue H256 in PDI and the phenoxyl group at position 7 in quercetin-3-rutinoside are essential for inhibition of PDI by quercetin-3-rutinoside. Rutin prolyl 4-hydroxylase subunit beta Homo sapiens