5AJO

Crystal structure of the inactive form of GalNAc-T2 in complex with the glycopeptide MUC5AC-3,13


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.48 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.158 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Dynamic Interplay between Catalytic and Lectin Domains of Galnac-Transferases Modulates Protein O-Glycosylation.

Lira-Navarrete, E.De Las Rivas, M.Companon, I.Pallares, M.C.Kong, Y.Iglesias-Fernandez, J.Bernardes, G.J.L.Peregrina, J.M.Rovira, C.Bernado, P.Bruscolini, P.Clausen, H.Lostao, A.Corzana, F.Hurtado-Guerrero, R.

(2015) Nat.Commun. 6: 6937

  • DOI: 10.1038/ncomms7937
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Protein O-glycosylation is controlled by polypeptide GalNAc-transferases (GalNAc-Ts) that uniquely feature both a catalytic and lectin domain. The underlying molecular basis of how the lectin domains of GalNAc-Ts contribute to glycopeptide specificit ...

    Protein O-glycosylation is controlled by polypeptide GalNAc-transferases (GalNAc-Ts) that uniquely feature both a catalytic and lectin domain. The underlying molecular basis of how the lectin domains of GalNAc-Ts contribute to glycopeptide specificity and catalysis remains unclear. Here we present the first crystal structures of complexes of GalNAc-T2 with glycopeptides that together with enhanced sampling molecular dynamics simulations demonstrate a cooperative mechanism by which the lectin domain enables free acceptor sites binding of glycopeptides into the catalytic domain. Atomic force microscopy and small-angle X-ray scattering experiments further reveal a dynamic conformational landscape of GalNAc-T2 and a prominent role of compact structures that are both required for efficient catalysis. Our model indicates that the activity profile of GalNAc-T2 is dictated by conformational heterogeneity and relies on a flexible linker located between the catalytic and the lectin domains. Our results also shed light on how GalNAc-Ts generate dense decoration of proteins with O-glycans.


    Organizational Affiliation

    BIFI, University of Zaragoza, BIFI-IQFR (CSIC) Joint Unit, Mariano Esquillor s/n, Campus Rio Ebro, Edificio I+D, Zaragoza 50018, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
POLYPEPTIDE N-ACETYLGALACTOSAMINYLTRANSFERASE 2
A
571Homo sapiensMutation(s): 1 
Gene Names: GALNT2
EC: 2.4.1.41
Find proteins for Q10471 (Homo sapiens)
Go to Gene View: GALNT2
Go to UniProtKB:  Q10471
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MUCIN
B
17Homo sapiensMutation(s): 0 
Gene Names: MUC5AC (MUC5)
Find proteins for P98088 (Homo sapiens)
Go to Gene View: MUC5AC
Go to UniProtKB:  P98088
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
A2G
Query on A2G

Download SDF File 
Download CCD File 
A
N-ACETYL-2-DEOXY-2-AMINO-GALACTOSE
C8 H15 N O6
OVRNDRQMDRJTHS-CBQIKETKSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.48 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.158 
  • Space Group: I 41
Unit Cell:
Length (Å)Angle (°)
a = 87.203α = 90.00
b = 87.203β = 90.00
c = 179.074γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
XDSdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2015-03-11
    Type: Initial release
  • Version 1.1: 2015-05-20
    Type: Database references
  • Version 1.2: 2017-09-13
    Type: Data collection