Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 84276.73 
• Atom Count: 5702 
• Residue Count: 749 
• Unique protein chains: 2

4N3C

Crystal Structure of human O-GlcNAc Transferase bound to a peptide from HCF-1 pro-repeat2(1-26) and UDP-GlcNAc

• DOI: 10.2210/pdb4N3C/pdb

• Classification: TRANSFERASE/SUBSTRATE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2013-10-06 Released: 2014-01-01 
• Deposition Author(s): Lazarus, M.B., Herr, W., Walker, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Free: 0.226 
• R-Value Work: 0.184 

Literature

HCF-1 is cleaved in the active site of O-GlcNAc transferase.

Lazarus, M.B., Jiang, J., Kapuria, V., Bhuiyan, T., Janetzko, J., Zandberg, W.F., Vocadlo, D.J., Herr, W., Walker, S.

(2013) Science 342: 1235-1239

• PubMed: 24311690 
• DOI: 10.1126/science.1243990
• Primary Citation of Related Structures:  
  4N3B, 4N3A, 4N39


• PubMed Abstract: 
  

Host cell factor-1 (HCF-1), a transcriptional co-regulator of human cell-cycle progression, undergoes proteolytic maturation in which any of six repeated sequences is cleaved by the nutrient-responsive glycosyltransferase, O-linked N-acetylglucosamine (O-GlcNAc) transferase (OGT). We report that the tetratricopeptide-repeat domain of O-GlcNAc transferase binds the carboxyl-terminal portion of an HCF-1 proteolytic repeat such that the cleavage region lies in the glycosyltransferase active site above uridine diphosphate-GlcNAc. The conformation is similar to that of a glycosylation-competent peptide substrate. Cleavage occurs between cysteine and glutamate residues and results in a pyroglutamate product. Conversion of the cleavage site glutamate into serine converts an HCF-1 proteolytic repeat into a glycosylation substrate. Thus, protein glycosylation and HCF-1 cleavage occur in the same active site.

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Organizational Affiliation: 

Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
UDP-N-acetylglucosamine--peptide N-acetylglucosaminyltransferase 110 kDa subunit	A	723	Homo sapiens	Mutation(s): 0  Gene Names: OGT EC: 2.4.1.255
Find proteins for O15294 (Homo sapiens) Go to Gene View: OGT Go to UniProtKB:  O15294

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Host cell factor 1	B	26	Homo sapiens	Mutation(s): 0  Gene Names: HCFC1 (HCF1, HFC1)
Find proteins for P51610 (Homo sapiens) Go to Gene View: HCFC1 Go to UniProtKB:  P51610

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
UD1	A	URIDINE-DIPHOSPHATE-N-ACETYLGLUCOSAMINE C17 H27 N3 O17 P2 LFTYTUAZOPRMMI-CFRASDGPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Free: 0.226 
• R-Value Work: 0.184 
• Space Group: P 6₁ 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 98.880	α = 90.00
b = 98.880	β = 90.00
c = 365.930	γ = 120.00

Software Package:

Software Name	Purpose
PHENIX	refinement
iMOSFLM	data reduction
PHENIX	phasing
SCALA	data scaling
PDB_EXTRACT	data extraction
CBASS	data collection

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-10-06 
• Released Date: 2014-01-01 
• Deposition Author(s): Lazarus, M.B., Herr, W., Walker, S.

Revision History 

• Version 1.0: 2014-01-01
  Type: Initial release