Function
Hypoxia-Inducible factor 1 alpha inhibitor. (SAP) is a plasma protein and is the precursor of amyloid P-component which is constituent of deposits in amyloidosis and Alzheimer disease[1]. SAP binds in a calcium-dependent fashion to a variety of ligands.
Relevance
Mutations in SAP affect the aggregation of mutated lysozyme which cause amyloidosis. The inhibition of SAP binding to amyloid fibrils is a therapeutic target in some serious human diseases[2]. Small molecule ligands can displace SAP from amyloid fibrils and can provide therapeutic treatment of amyloidosis.
Structural highlights
shows the nucleotide phosphate group bridging two Ca+2 ions and forming hydrogen bonds to Asn, Gln and Try residues of SAP [3].