5BO7

Structure of human sialyltransferase ST8SiaIII in complex with CTP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Structure of human ST8SiaIII sialyltransferase provides insight into cell-surface polysialylation.

Volkers, G.Worrall, L.J.Kwan, D.H.Yu, C.C.Baumann, L.Lameignere, E.Wasney, G.A.Scott, N.E.Wakarchuk, W.Foster, L.J.Withers, S.G.Strynadka, N.C.

(2015) Nat.Struct.Mol.Biol. 22: 627-635

  • DOI: 10.1038/nsmb.3060
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Sialyltransferases of the mammalian ST8Sia family catalyze oligo- and polysialylation of surface-localized glycoproteins and glycolipids through transfer of sialic acids from CMP-sialic acid to the nonreducing ends of sialic acid acceptors. The cryst ...

    Sialyltransferases of the mammalian ST8Sia family catalyze oligo- and polysialylation of surface-localized glycoproteins and glycolipids through transfer of sialic acids from CMP-sialic acid to the nonreducing ends of sialic acid acceptors. The crystal structure of human ST8SiaIII at 1.85-Å resolution presented here is, to our knowledge, the first solved structure of a polysialyltransferase from any species, and it reveals a cluster of polysialyltransferase-specific structural motifs that collectively provide an extended electropositive surface groove for binding of oligo-polysialic acid chain products. The ternary complex of ST8SiaIII with a donor sugar analog and a sulfated glycan acceptor identified with a sialyltransferase glycan array provides insight into the residues involved in substrate binding, specificity and sialyl transfer.


    Organizational Affiliation

    1] Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada. [2] Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sia-alpha-2,3-Gal-beta-1,4-GlcNAc-R:alpha 2,8-sialyltransferase
A, B
323Homo sapiensMutation(s): 0 
Gene Names: ST8SIA3 (SIAT8C)
EC: 2.4.99.-
Find proteins for O43173 (Homo sapiens)
Go to Gene View: ST8SIA3
Go to UniProtKB:  O43173
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FUC
Query on FUC

Download SDF File 
Download CCD File 
A
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
CTP
Query on CTP

Download SDF File 
Download CCD File 
A, B
CYTIDINE-5'-TRIPHOSPHATE
C9 H16 N3 O14 P3
PCDQPRRSZKQHHS-XVFCMESISA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 71.335α = 90.00
b = 96.497β = 90.00
c = 124.655γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-15
    Type: Initial release
  • Version 1.1: 2015-07-29
    Type: Database references
  • Version 1.2: 2015-08-12
    Type: Database references
  • Version 1.3: 2017-11-01
    Type: Author supporting evidence, Derived calculations, Refinement description
  • Version 2.0: 2017-11-29
    Type: Atomic model, Data collection, Derived calculations, Non-polymer description, Refinement description, Structure summary