6APJ image
Deposition Date 2017-08-17
Release Date 2017-12-20
Last Version Date 2024-11-06
Entry Detail
PDB ID:
6APJ
Keywords:
Title:
Crystal Structure of human ST6GALNAC2
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.10 Å
R-Value Free:
0.25
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Alpha-N-acetylgalactosaminide alpha-2,6-sialyltransferase 2
Gene (Uniprot):ST6GALNAC2
Chain IDs:A, B, C, D, E, F
Chain Length:374
Number of Molecules:6
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET modified residue
Ligand Molecules
Primary Citation
Expression system for structural and functional studies of human glycosylation enzymes.
Nat. Chem. Biol. 14 156 162 (2018)
PMID: 29251719 DOI: 10.1038/nchembio.2539

Abstact

Vertebrate glycoproteins and glycolipids are synthesized in complex biosynthetic pathways localized predominantly within membrane compartments of the secretory pathway. The enzymes that catalyze these reactions are exquisitely specific, yet few have been extensively characterized because of challenges associated with their recombinant expression as functional products. We used a modular approach to create an expression vector library encoding all known human glycosyltransferases, glycoside hydrolases, and sulfotransferases, as well as other glycan-modifying enzymes. We then expressed the enzymes as secreted catalytic domain fusion proteins in mammalian and insect cell hosts, purified and characterized a subset of the enzymes, and determined the structure of one enzyme, the sialyltransferase ST6GalNAcII. Many enzymes were produced at high yields and at similar levels in both hosts, but individual protein expression levels varied widely. This expression vector library will be a transformative resource for recombinant enzyme production, broadly enabling structure-function studies and expanding applications of these enzymes in glycochemistry and glycobiology.

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Primary Citation of related structures