3ric | pdb_00003ric

Crystal Structure of D48V||A47D mutant of Human Glycolipid Transfer Protein complexed with 3-O-sulfo-galactosylceramide containing nervonoyl acyl chain (24:1)

spinqualitylabelsall models 3ric, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3ric is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CIS Related: 2evt, 1swx, 3rwv, 3rzn, 3s0i, 3s0k Gene: GLTP (Homo sapiens) Activity: DNA-directed DNA polymerase, with EC number 2.7.7.7 Resources: FirstGlance, OCA, RCSB, PDBsum Function [GLTP_HUMAN] Accelerates the intermembrane transfer of various glycolipids. Catalyzes the transfer of various glycosphingolipids between membranes but does not catalyze the transfer of phospholipids. May be involved in the intracellular translocation of glucosylceramides. Publication Abstract from PubMed Human glycolipid transfer protein (GLTP) fold represents a novel structural motif for lipid binding/transfer and reversible membrane translocation. GLTPs transfer glycosphingolipids (GSLs) that are key regulators of cell growth, division, surface adhesion, and neurodevelopment. Herein, we report structure-guided engineering of the lipid binding features of GLTP. New crystal structures of wild-type GLTP and two mutants (D48V and A47D ||D48V), each containing bound N-nervonoyl-sulfatide, reveal the molecular basis for selective anchoring of sulfatide (3-O-sulfo-galactosylceramide) by D48V-GLTP. Directed point mutations of "portal entrance" residues, A47 and D48, reversibly regulate sphingosine access to the hydrophobic pocket via a mechanism that could involve homodimerization. "Door-opening" conformational changes by phenylalanines within the hydrophobic pocket are revealed during lipid encapsulation by new crystal structures of bona fide apo-GLTP and GLTP complexed with N-oleoyl-glucosylceramide. The development of "engineered GLTPs" with enhanced specificity for select GSLs provides a potential new therapeutic approach for targeting GSL-mediated pathologies. Enhanced selectivity for sulfatide by engineered human glycolipid transfer protein.,Samygina VR, Popov AN, Cabo-Bilbao A, Ochoa-Lizarralde B, Goni-de-Cerio F, Zhai X, Molotkovsky JG, Patel DJ, Brown RE, Malinina L Structure. 2011 Nov 9;19(11):1644-54. PMID:22078563 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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