4GHP

Crystal Structure of D48V||A47D mutant of Human GLTP bound with 12:0 monosulfatide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural insights into lipid-dependent reversible dimerization of human GLTP.

Samygina, V.R.Ochoa-Lizarralde, B.Popov, A.N.Cabo-Bilbao, A.Goni-de-Cerio, F.Molotkovsky, J.G.Patel, D.J.Brown, R.E.Malinina, L.

(2013) Acta Crystallogr.,Sect.D 69: 603-616

  • DOI: 10.1107/S0907444913000024
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Human glycolipid transfer protein (hsGLTP) forms the prototypical GLTP fold and is characterized by a broad transfer selectivity for glycosphingolipids (GSLs). The GLTP mutation D48V near the `portal entrance' of the glycolipid binding site has recen ...

    Human glycolipid transfer protein (hsGLTP) forms the prototypical GLTP fold and is characterized by a broad transfer selectivity for glycosphingolipids (GSLs). The GLTP mutation D48V near the `portal entrance' of the glycolipid binding site has recently been shown to enhance selectivity for sulfatides (SFs) containing a long acyl chain. Here, nine novel crystal structures of hsGLTP and the SF-selective mutant complexed with short-acyl-chain monoSF and diSF in different crystal forms are reported in order to elucidate the potential functional roles of lipid-mediated homodimerization. In all crystal forms, the hsGLTP-SF complexes displayed homodimeric structures supported by similarly organized intermolecular interactions. The dimerization interface always involved the lipid sphingosine chain, the protein C-terminus (C-end) and α-helices 6 and 2, but the D48V mutant displayed a `locked' dimer conformation compared with the hinge-like flexibility of wild-type dimers. Differences in contact angles, areas and residues at the dimer interfaces in the `flexible' and `locked' dimers revealed a potentially important role of the dimeric structure in the C-end conformation of hsGLTP and in the precise positioning of the key residue of the glycolipid recognition centre, His140. ΔY207 and ΔC-end deletion mutants, in which the C-end is shifted or truncated, showed an almost complete loss of transfer activity. The new structural insights suggest that ligand-dependent reversible dimerization plays a role in the function of human GLTP.


    Organizational Affiliation

    Structural Biology Unit, CIC bioGUNE, Technology Park of Bizkaia, 48160 Derio, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glycolipid transfer protein
A
209Homo sapiensMutation(s): 2 
Gene Names: GLTP
Find proteins for Q9NZD2 (Homo sapiens)
Go to Gene View: GLTP
Go to UniProtKB:  Q9NZD2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EIS
Query on EIS

Download SDF File 
Download CCD File 
A
N-{(2S,3R,4E)-3-hydroxy-1-[(3-O-sulfo-beta-D-galactopyranosyl)oxy]octadec-4-en-2-yl}dodecanamide
C36 H69 N O11 S
FWVDYZZBQLRRDU-AZNTWQPMSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.213 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 76.331α = 90.00
b = 49.118β = 123.58
c = 68.120γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-04-10
    Type: Initial release