4exz

Crystal Structure of the Q108K:K40L Mutant of Cellular Retinol Binding Protein Type II in Complex with All-trans-Retinal at 1.7 Angstrom Resolution

spinqualitylabelsall models 4exz, resolution 1.61Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4exz is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.608Å Ligands: ACT, RET Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RET2_HUMAN Intracellular transport of retinol. Publication Abstract from PubMed Protein-chromophore interactions are a central component of a wide variety of critical biological processes such as color vision and photosynthesis. To understand the fundamental elements that contribute to spectral tuning of a chromophore inside the protein cavity, we redesigned human cellular retinol binding protein II (hCRBPII) to fully encapsulate all-trans-retinal and form a covalent bond as a protonated Schiff base. This system, using rational mutagenesis designed to alter the electrostatic environment within the binding pocket of the host protein, enabled regulation of the absorption maximum of the pigment in the range of 425 to 644 nanometers. With only nine point mutations, the hCRBPII mutants induced a systematic shift in the absorption profile of all-trans-retinal of more than 200 nanometers across the visible spectrum. Tuning the electronic absorption of protein-embedded all-trans-retinal.,Wang W, Nossoni Z, Berbasova T, Watson CT, Yapici I, Lee KS, Vasileiou C, Geiger JH, Borhan B Science. 2012 Dec 7;338(6112):1340-3. doi: 10.1126/science.1226135. PMID:23224553 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Retinol-binding protein 3D structures

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