1utr
From Proteopedia
UTEROGLOBIN-PCB COMPLEX (REDUCED FORM)
Overview
Metabolites of polychlorinated biphenyls (PCBs) bind with high affinity to uteroglobin, a small homodimeric protein that also binds progesterone. We present the solution structure of the reduced form of rat uteroglobin in complex with a PCB methylsulphone, (MeSO2)2-TCB. The structure reveals the molecular basis for the accumulation of (MeSO2)2-TCB by uteroglobin. The structure also shows how ligand binding and release might be controlled by reduction/oxidation of two intermolecular disulphide bonds. Breakage of these bonds induces a local unfolding of the N- and C-termini and a separation of helices creating a channel into the binding site. These effects make the ligand binding cavity readily accessible to entry of the ligand.
About this Structure
1UTR is a Single protein structure of sequence from Rattus norvegicus. Full crystallographic information is available from OCA.
Reference
Solution structure of a mammalian PCB-binding protein in complex with a PCB., Hard T, Barnes HJ, Larsson C, Gustafsson JA, Lund J, Nat Struct Biol. 1995 Nov;2(11):983-9. PMID:7583672 Page seeded by OCA on Sat May 3 11:40:38 2008
