Primary Citation of Related Structures: 2A2G, 2A2U
PubMed Abstract:
Alpha 2u-globulin (A2U) is the major urinary protein excreted by adult male rats. The structure of a monoclinic crystal form of A2U was reported in 1992 [Böcskei et al. (1992). Nature (London), 360, 186-188]. The structures of an orthorhombic crystal form of A2U at 2 ...
Alpha 2u-globulin (A2U) is the major urinary protein excreted by adult male rats. The structure of a monoclinic crystal form of A2U was reported in 1992 [Böcskei et al. (1992). Nature (London), 360, 186-188]. The structures of an orthorhombic crystal form of A2U at 2. 5 A resolution (refined to an R factor of 0.248; Rfree = 0.264) and of a complex between A2U and d-limonene 1,2-epoxide (DLO) at 2.9 A resolution (R factor = 0.248; Rfree = 0.260) are presented here. DLO is one of a diverse group of chemicals which cause a male rat-specific renal carcinogenesis called hyaline-droplet nephropathy. The rate-determining step in the development of this disorder is the binding of the toxin to A2U. Comparison of the cavities in A2U and in the corresponding mouse urinary protein (MUP) reveal that the former is tailor-made for small oval hydrophobic ligands such as DLO. The cavity in MUP is more shallow and elongated and cannot easily accommodate such ligands.
Related Citations:
Lipid-Binding Proteins: A Family of Fatty Acid and Retinoid Transport Proteins Banaszak, L., Winter, N., Xu, Z., Bernlohr, D.A., Cowan, S.W., Jones, T.A. (1994) Adv Protein Chem 45: 89
Pheromone Binding to Two Rodent Urinary Proteins Revealed by X-Ray Crystallography Bocskei, Z., Groom, C.R., Flower, D.R., Wright, C.E., Phillips, S.E.V., Cavaggioni, A., Findlay, J.B.C., North, A.C.T. (1992) Nature 360: 186
Organizational Affiliation:
Department of Cell and Molecular Biology, Uppsala University, Biomedical Centre, Box 590, SE-751 24 Uppsala, Sweden.
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