5nuj

Engineered beta-lactoglobulin: variant I56F-L39A in complex with chlorpromazine (LG-FA-CLP)

spinqualitylabelsall models 5nuj, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5nuj is a 1 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.6Å Ligands: Z80 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function LACB_BOVIN Primary component of whey, it binds retinol and is probably involved in the transport of that molecule. Publication Abstract from PubMed Chlorpromazine (CPZ) is a phenothiazine acting as dopamine antagonist. Aside from application in schizophrenia therapy, chlorpromazine is found to be a putative inhibitor of proteins involved in cancers, heritable autism disorder and prion diseases. Four new beta-lactoglobulin variants with double or triple substitutions: I56F/L39A, F105L/L39A, I56F/L39A/M107F or F105L/L39A/M107F changing the shape of the binding pocket were produced and their chlorpromazine binding properties have been investigated by X-ray crystallography, circular dichroism, isothermal titration calorimetry and thermophoresis. The CD spectra and crystal structures revealed that mutations do not affect the protein overall structure but in comparison to WT protein, variants possessing I56F substitution had lower stability while mutation F105L increased melting temperature of the protein. The new variants showed affinity to chlorpromazine in the range 4.2-15.4x10(3)M(-1). The CD spectra and crystal structures revealed complementarity of the binding pocket shape, to only one chlorpromazine chiral conformer. The (aR)-CPZ was bonded to variants containing I56F substitution while variants with F105L substitution preferred (aS)-CPZ. The engineered beta-lactoglobulin with complementarity to the chlorpromazine chiral conformers.,Loch JI, Bonarek P, Tworzydlo M, Lazinska I, Szydlowska J, Lipowska J, Rzesikowska K, Lewinski K Int J Biol Macromol. 2018 Mar 16;114:85-96. doi: 10.1016/j.ijbiomac.2018.03.074. PMID:29555509 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Beta-lactoglobulin 3D structures

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