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5yqp

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Revision as of 09:25, 21 October 2020

Crystal structure of the second StARkin domain of Lam4

Structural highlights

5yqp is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[LAM4_YEAST] May be involved in sterol transfer between intracellular membranes.^[1]

Publication Abstract from PubMed

Membrane contact sites (MCSs) in eukaryotic cells are hotspots for lipid exchange, which is essential for many biological functions, including regulation of membrane properties and protein trafficking. Lipid transfer proteins anchored at membrane contact sites (LAMs) contain sterol-specific lipid transfer domains [StARkin domain (SD)] and multiple targeting modules to specific membrane organelles. Elucidating the structural mechanisms of targeting and ligand recognition by LAMs is important for understanding the interorganelle communication and exchange at MCSs. Here, we determined the crystal structures of the yeast Lam6 pleckstrin homology (PH)-like domain and the SDs of Lam2 and Lam4 in the apo form and in complex with ergosterol. The Lam6 PH-like domain displays a unique PH domain fold with a conserved N-terminal alpha-helix. The Lam6 PH-like domain lacks the basic surface for phosphoinositide binding, but contains hydrophobic patches on its surface, which are critical for targeting to endoplasmic reticulum (ER)-mitochondrial contacts. Structures of the LAM SDs display a helix-grip fold with a hydrophobic cavity and a flexible Omega1-loop as a lid. Ergosterol is bound to the pocket in a head-down orientation, with its hydrophobic acyl group located in the tunnel entrance. The Omega1-loop in an open conformation is essential for ergosterol binding by direct hydrophobic interaction. Structural comparison suggested that the sterol binding mode of the Lam2 SD2 is likely conserved among the sterol transfer proteins of the StARkin superfamily. Structural models of full-length Lam2 correlated with the sterol transport function at the membrane contact sites.

Structural basis of sterol recognition and nonvesicular transport by lipid transfer proteins anchored at membrane contact sites.,Tong J, Manik MK, Im YJ Proc Natl Acad Sci U S A. 2018 Jan 16. pii: 1719709115. doi:, 10.1073/pnas.1719709115. PMID:29339490^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Gatta AT, Wong LH, Sere YY, Calderon-Norena DM, Cockcroft S, Menon AK, Levine TP. A new family of StART domain proteins at membrane contact sites has a role in ER-PM sterol transport. Elife. 2015 May 22;4. doi: 10.7554/eLife.07253. PMID:26001273 doi:http://dx.doi.org/10.7554/eLife.07253
↑ Tong J, Manik MK, Im YJ. Structural basis of sterol recognition and nonvesicular transport by lipid transfer proteins anchored at membrane contact sites. Proc Natl Acad Sci U S A. 2018 Jan 16. pii: 1719709115. doi:, 10.1073/pnas.1719709115. PMID:29339490 doi:http://dx.doi.org/10.1073/pnas.1719709115

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5yqp"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the second StARkin domain of Lam4==
-<StructureSection load='5yqp' size='340' side='right' caption='[[5yqp]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
+<StructureSection load='5yqp' size='340' side='right'caption='[[5yqp]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5yqp]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5YQP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5YQP FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5yqp]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5YQP OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5YQP FirstGlance]. <br>
-</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5yqp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5yqp OCA], [http://pdbe.org/5yqp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5yqp RCSB], [http://www.ebi.ac.uk/pdbsum/5yqp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5yqp ProSAT]</span></td></tr>
+</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5yqp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5yqp OCA], [http://pdbe.org/5yqp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5yqp RCSB], [http://www.ebi.ac.uk/pdbsum/5yqp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5yqp ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 21: / Line 21: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: IM, Y J]]
 [[Category: Manik, K M]]

5yqp

From Proteopedia

Revision as of 09:25, 21 October 2020

Crystal structure of the second StARkin domain of Lam4

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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