4uc2 | pdb_00004uc2

Crystal structure of translocator protein 18kDa (TSPO) from rhodobacter sphaeroides (A139T mutant) in P212121 space group

spinqualitylabelsall models 4uc2, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4uc2 is a 2 chain structure with sequence from Cereibacter sphaeroides. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.4Å Ligands: OLC, PG4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TSPO_CERSP May play a role in the transmembrane transport of tetrapyrroles and similar compounds, and thereby contribute to the regulation of tetrapyrrole biosynthesis (PubMed:10409680). Binds tetrapyrroles and promotes the photooxidative degradation of protoporphyrin IX (PubMed:23651039). Binds protoporphyrin IX, hemin, and coproporphyrin III, but does not bind delta-aminolevulinic acid (PubMed:23952237, PubMed:20541505, PubMed:25635101). Can bind bilirubin, curcumin, gossypol, retinoic acid, cholesterol and the benzodiazepine receptor agonist PK-11195 (in vitro) (PubMed:23952237, PubMed:25635101). Plays a role in the response to low oxygen levels and in the regulation of the biosynthesis of photosynthetic pigments (PubMed:7673149, PubMed:10409680, PubMed:10681549). Publication Abstract from PubMed The 18-kilodalton translocator protein (TSPO), proposed to be a key player in cholesterol transport into mitochondria, is highly expressed in steroidogenic tissues, metastatic cancer, and inflammatory and neurological diseases such as Alzheimer's and Parkinson's. TSPO ligands, including benzodiazepine drugs, are implicated in regulating apoptosis and are extensively used in diagnostic imaging. We report crystal structures (at 1.8, 2.4, and 2.5 angstrom resolution) of TSPO from Rhodobacter sphaeroides and a mutant that mimics the human Ala(147)-->Thr(147) polymorphism associated with psychiatric disorders and reduced pregnenolone production. Crystals obtained in the lipidic cubic phase reveal the binding site of an endogenous porphyrin ligand and conformational effects of the mutation. The three crystal structures show the same tightly interacting dimer and provide insights into the controversial physiological role of TSPO and how the mutation affects cholesterol binding. Protein structure. Crystal structures of translocator protein (TSPO) and mutant mimic of a human polymorphism.,Li F, Liu J, Zheng Y, Garavito RM, Ferguson-Miller S Science. 2015 Jan 30;347(6221):555-8. doi: 10.1126/science.1260590. PMID:25635101 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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