Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Interaction between the PH and START domains of ceramide transfer protein competes with phosphatidylinositol 4-phosphate binding by the PH domain

Journal Article · · Journal of Biological Chemistry
 [1];  [1];  [2];  [2];  [3];  [1]
  1. Univ. of Missouri, Kansas City, MO (United States). Division of Molecular Biology and Biochemistry. School of Biological Sciences
  2. Univ. of Missouri, Kansas City, MO (United States). Dept. of Basic Medical Science. School of Medicine
  3. Slovak Univ. of Technology in Bratislava (Slovakia). Dept. of Organic Chemistry
De novo synthesis of the sphingolipid sphingomyelin requires non-vesicular transport of ceramide from the endoplasmic reticulum to the Golgi by the multidomain protein ceramide transfer protein (CERT). CERT's N-terminal pleckstrin homology (PH) domain targets it to the Golgi by binding to phosphatidylinositol 4-phosphate (PtdIns(4)P) in the Golgi membrane, whereas its C-terminal StAR-related lipid transfer domain (START) carries out ceramide transfer. Hyperphosphorylation of a serine-rich motif immediately after the PH domain decreases both PtdIns(4)P binding and ceramide transfer by CERT. This down-regulation requires both the PH and START domains, suggesting a possible inhibitory interaction between the two domains. In this study we show that isolated PH and START domains interact with each other. The crystal structure of a PH–START complex revealed that the START domain binds to the PH domain at the same site for PtdIns(4)P-binding, suggesting that the START domain competes with PtdIns(4)P for association with the PH domain. We further report that mutations disrupting the PH–START interaction increase both PtdIns(4)P-binding affinity and ceramide transfer activity of a CERT-serine–rich phosphorylation mimic. We also found that these mutations increase the Golgi localization of CERT inside the cell, consistent with enhanced PtdIns(4)P binding of the mutant. Collectively, our structural, biochemical, and cellular investigations provide important structural insight into the regulation of CERT function and localization.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC)
OSTI ID:
1397292
Journal Information:
Journal of Biological Chemistry, Journal Name: Journal of Biological Chemistry Journal Issue: 34 Vol. 292; ISSN 0021-9258
Publisher:
American Society for Biochemistry and Molecular BiologyCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

References (47)

Two sphingolipid transfer proteins, CERT and FAPP2: Their roles in sphingolipid metabolism journal August 2008
Multigrid solution of the Poisson?Boltzmann equation journal January 1993
Numerical solution of the nonlinear Poisson-Boltzmann equation: Developing more robust and efficient methods journal March 1995
A Fluorescence Resonance Energy Transfer Approach for Monitoring Protein-Mediated Glycolipid Transfer between Vesicle Membranes journal March 1999
NMRPipe: A multidimensional spectral processing system based on UNIX pipes journal November 1995
[20] Processing of X-ray diffraction data collected in oscillation mode book January 1997
Sphingolipid transport in eukaryotic cells journal June 2000
Calculations and Publication-Quality Illustrations for Analytical Ultracentrifugation Data book January 2015
The intermembrane ceramide transport catalyzed by CERT is sensitive to the lipid environment journal January 2011
Membrane lipids and vesicular traffic journal August 2004
Inference of Macromolecular Assemblies from Crystalline State journal September 2007
Crystal Structures of the CERT START Domain with Inhibitors Provide Insights into the Mechanism of Ceramide Transfer journal February 2010
Structural and Thermodynamic Characterization of the Interaction between Two Periplasmic Treponema pallidum Lipoproteins that are Components of a TPR-Protein-Associated TRAP Transporter (TPAT) journal June 2012
High-precision, automated integration of multiple isothermal titration calorimetric thermograms: New features of NITPIC journal April 2015
High-Precision Isothermal Titration Calorimetry with Automated Peak-Shape Analysis journal June 2012
1.67-.ANG. X-ray structure of the B2 immunoglobulin-binding domain of streptococcal protein G and comparison to the NMR structure of the B1 domain journal November 1992
Two Crystal Structures of the B1 Immunoglobulin-Binding Domain of Streptococcal Protein G and Comparison with NMR journal April 1994
GRP1 Pleckstrin Homology Domain:  Activation Parameters and Novel Search Mechanism for Rare Target Lipid journal December 2004
Stereoselective Synthesis and Structure−Activity Relationship of Novel Ceramide Trafficking Inhibitors. (1 R ,3 R )- N -(3-Hydroxy-1-hydroxymethyl-3-phenylpropyl)dodecanamide and Its Analogues journal July 2003
Expedient and Practical Synthesis of CERT-Dependent Ceramide Trafficking Inhibitor HPA-12 and Its Analogues journal February 2011
Molecular machinery for non-vesicular trafficking of ceramide journal December 2003
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Principles of bioactive lipid signalling: lessons from sphingolipids journal February 2008
Structural basis for specific lipid recognition by CERT responsible for nonvesicular trafficking of ceramide journal January 2008
Electrostatics of nanosystems: Application to microtubules and the ribosome journal August 2001
A Novel Inhibitor of Ceramide Trafficking from the Endoplasmic Reticulum to the Site of Sphingomyelin Synthesis journal November 2001
Structural Basis for the Golgi Association by the Pleckstrin Homology Domain of the Ceramide Trafficking Protein (CERT) journal September 2012
Phosphoregulation of the Ceramide Transport Protein CERT at Serine 315 in the Interaction with VAMP-associated Protein (VAP) for Inter-organelle Trafficking of Ceramide in Mammalian Cells journal April 2014
Efficient Trafficking of Ceramide from the Endoplasmic Reticulum to the Golgi Apparatus Requires a VAMP-associated Protein-interacting FFAT Motif of CERT journal October 2006
Interorganelle Trafficking of Ceramide Is Regulated by Phosphorylation-dependent Cooperativity between the PH and START Domains of CERT journal June 2007
Protein Phosphatase 2Cϵ Is an Endoplasmic Reticulum Integral Membrane Protein That Dephosphorylates the Ceramide Transport Protein CERT to Enhance Its Association with Organelle Membranes journal March 2008
Regulation of secretory transport by protein kinase D–mediated phosphorylation of the ceramide transfer protein journal June 2007
AlphaLISA Immunoassay Platform— The “No-Wash” High-Throughput Alternative to ELISA journal February 2009
Coordinated Lipid Transfer between the Endoplasmic Reticulum and the Golgi Complex Requires the VAP Proteins and Is Essential for Golgi-mediated Transport journal September 2008
Casein Kinase Iγ2 Down-Regulates Trafficking of Ceramide in the Synthesis of Sphingomyelin journal January 2009
Coordinated Lipid Transfer between the Endoplasmic Reticulum and the Golgi Complex Requires the VAP Proteins and Is Essential for Golgi-mediated Transport journal September 2008
Casein Kinase Iγ2 Down-Regulates Trafficking of Ceramide in the Synthesis of Sphingomyelin journal January 2009
Phaser crystallographic software journal July 2007
MolProbity : all-atom structure validation for macromolecular crystallography journal December 2009
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Features and development of Coot journal March 2010
Overview of the CCP 4 suite and current developments journal March 2011
Towards automated crystallographic structure refinement with phenix.refine journal March 2012
Refinement of Macromolecular Structures by the Maximum-Likelihood Method journal May 1997
Studying multisite binary and ternary protein interactions by global analysis of isothermal titration calorimetry data in SEDPHAT: Application to adaptor protein complexes in cell signaling journal January 2007
A novel, highly stable fold of the immunoglobulin binding domain of streptococcal protein G journal August 1991
Crystal Structure of the Pleckstrin Homology Domain from the Ceramide Transfer Protein: Implications for Conformational Change upon Ligand Binding journal November 2013

Cited By (6)

Erratum: Lipid-transfer proteins rectify inter-organelle flux and accurately deliver lipids at membrane contact sites journal October 2018
Lipid transfer proteins: the lipid commute via shuttles, bridges and tubes journal October 2018
Phosphoinositide binding by the PH domain in ceramide transfer protein (CERT) is inhibited by hyperphosphorylation of an adjacent serine-repeat motif journal July 2018
Protein kinase D1 and oxysterol-binding protein form a regulatory complex independent of phosphorylation journal September 2018
Lipid transfer proteins rectify inter-organelle flux and accurately deliver lipids at membrane contact sites journal August 2018
Phosphorylation of a serine/proline-rich motif in oxysterol binding protein-related protein 4L (ORP4L) regulates cholesterol and vimentin binding journal March 2019