6EJE

Human Xylosyltransferase 1 in complex with peptide PAAEGSGEQDFT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for the Initiation of Glycosaminoglycan Biosynthesis by Human Xylosyltransferase 1.

Briggs, D.C.Hohenester, E.

(2018) Structure 26: 801-809.e3

  • DOI: 10.1016/j.str.2018.03.014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Proteoglycans (PGs) are essential components of the animal extracellular matrix and are required for cell adhesion, migration, signaling, and immune function. PGs are composed of a core protein and long glycosaminoglycan (GAG) chains, which often spe ...

    Proteoglycans (PGs) are essential components of the animal extracellular matrix and are required for cell adhesion, migration, signaling, and immune function. PGs are composed of a core protein and long glycosaminoglycan (GAG) chains, which often specify PG function. GAG biosynthesis is initiated by peptide O-xylosyltransferases, which transfer xylose onto selected serine residues in the core proteins. We have determined crystal structures of human xylosyltransferase 1 (XT1) in complex with the sugar donor, UDP-xylose, and various acceptor peptides. The structures reveal unique active-site features that, in conjunction with functional experiments, explain the substrate specificity of XT1. A constriction within the peptide binding cleft requires the acceptor serine to be followed by glycine or alanine. The remainder of the cleft can accommodate a wide variety of sequences, but with a general preference for acidic residues. These findings provide a framework for understanding the selectivity of GAG attachment.


    Organizational Affiliation

    Department of Life Sciences, Imperial College London, London SW7 2AZ, UK. Electronic address: david.briggs@crick.ac.uk.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Xylosyltransferase 1
A
751Homo sapiensMutation(s): 0 
Gene Names: XYLT1 (XT1)
EC: 2.4.2.26
Find proteins for Q86Y38 (Homo sapiens)
Go to Gene View: XYLT1
Go to UniProtKB:  Q86Y38
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Syndecan-1
B
12Homo sapiensMutation(s): 0 
Gene Names: SDC1 (SDC)
Find proteins for P18827 (Homo sapiens)
Go to Gene View: SDC1
Go to UniProtKB:  P18827
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 67.280α = 90.00
b = 86.720β = 90.00
c = 153.470γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom101748/Z/13/Z

Revision History 

  • Version 1.0: 2018-05-02
    Type: Initial release
  • Version 1.1: 2018-06-13
    Type: Data collection, Database references