4PO7

Structure of the Sortilin:neurotensin complex at excess neurotensin concentration


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Revisiting the structure of the Vps10 domain of human sortilin and its interaction with neurotensin.

Quistgaard, E.M.Grftehauge, M.K.Madsen, P.Pallesen, L.T.Christensen, B.Srensen, E.S.Nissen, P.Petersen, C.M.Thirup, S.S.

(2014) Protein Sci. 23: 1291-1300

  • DOI: 10.1002/pro.2512

  • PubMed Abstract: 
  • Sortilin is a multifunctional receptor involved in sorting and apoptosis. We have previously reported a 2.0-Å structure of the Vps10 ectodomain in complex with one of its ligands, the tridecapeptide neurotensin. Here we set out to further characteriz ...

    Sortilin is a multifunctional receptor involved in sorting and apoptosis. We have previously reported a 2.0-Å structure of the Vps10 ectodomain in complex with one of its ligands, the tridecapeptide neurotensin. Here we set out to further characterize the structural properties of sortilin and its interaction with neurotensin. To this end, we have determined a new 2.7 Å structure using a crystal grown with a 10-fold increased concentration of neurotensin. Here a second peptide fragment was observed within the Vps10 β-propeller, which may in principle either represent a second molecule of neurotensin or the N-terminal part of the molecule bound at the previously identified binding site. However, in vitro binding experiments strongly favor the latter hypothesis. Neurotensin thus appears to bind with a 1:1 stoichiometry, and whereas the N-terminus does not bind on its own, it enhances the affinity in context of full-length neurotensin. We conclude that the N-terminus of neurotensin probably functions as an affinity enhancer for binding to sortilin by engaging the second binding site. Crystal packing differs partly from the previous structure, which may be due to variations in the degree and pattern of glycosylations. Consequently, a notable hydrophobic loop, not modeled previously, could now be traced. A computational analysis suggests that this and a neighboring loop may insert into the membrane and thus restrain movement of the Vps10 domain. We have, furthermore, mapped all N-linked glycosylations of CHO-expressed human sortilin by mass spectrometry and find that their locations are compatible with membrane insertion of the hydrophobic loops.


    Organizational Affiliation

    Department of Molecular Biology and Genetics, MIND Centre, Aarhus University, Gustav Wieds Vej 10C, DK 8000, Aarhus C, Denmark; Department of Medical Biochemistry and Biophysics, Karolinska Institute, 17177, Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sortilin
A
685Homo sapiensMutation(s): 0 
Gene Names: SORT1
Find proteins for Q99523 (Homo sapiens)
Go to Gene View: SORT1
Go to UniProtKB:  Q99523
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Neurotensin/neuromedin N
N, P
13Homo sapiensMutation(s): 0 
Gene Names: NTS
Find proteins for P30990 (Homo sapiens)
Go to Gene View: NTS
Go to UniProtKB:  P30990
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BMA
Query on BMA

Download SDF File 
Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
PG4
Query on PG4

Download SDF File 
Download CCD File 
A
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
N, P
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.166 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 162.010α = 90.00
b = 78.650β = 126.62
c = 110.980γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-23
    Type: Initial release
  • Version 1.1: 2014-07-30
    Type: Other
  • Version 1.2: 2014-09-24
    Type: Database references
  • Version 1.3: 2018-03-07
    Type: Advisory, Data collection