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Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2018 ; 115 (5): E856-65 Nephropedia Template TP
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Structural basis of sterol recognition and nonvesicular transport by lipid transfer proteins anchored at membrane contact sites #MMPMID29339490
Tong J; Manik MK; Im YJ
Proc Natl Acad Sci U S A 2018[Jan]; 115 (5): E856-65 PMID29339490show ga
Intracellular sterol distribution mediated by lipid transfer proteins (LTPs) is crucial for membrane function. LTPs anchored at membrane contact sites (LAMs), new members of LTPs in the StARkin superfamily, have sterol transport roles at contact sites between the endoplasmic reticulum (ER) and other membranes. The determinants for ligand specificity and protein targeting were elusive. Here, we determined the structures of the pleckstrin homology (PH)-like domain and the StARkin domains from LAM homologs. The Lam6 PH-like domain has a unique PH domain fold critical for targeting to ER?mitochondrial contacts. The LAM StARkin domains have a hydrophobic cavity that accommodates a sterol ligand. This work provides a structural explanation for the sterol recognition of LAMs, which can be extended to understand the sterol-binding mode of other LTPs in the StARkin superfamily.