2LMS

A single GalNAc residue on Threonine-106 modifies the dynamics and the structure of Interferon alpha-2a around the glycosylation site


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 

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Literature

A single N-acetylgalactosamine residue at threonine 106 modifies the dynamics and structure of interferon alpha2a around the glycosylation site.

Ghasriani, H.Belcourt, P.J.Sauve, S.Hodgson, D.J.Brochu, D.Gilbert, M.Aubin, Y.

(2013) J Biol Chem 288: 247-254

  • DOI: 10.1074/jbc.M112.413252
  • Primary Citation of Related Structures:  
    2LMS

  • PubMed Abstract: 
  • Enzymatic addition of GalNAc to isotopically labeled IFNα2a produced in Escherichia coli yielded the O-linked glycoprotein GalNAcα-[(13)C,(15)N]IFNα2a. The three-dimensional structure of GalNAcα-IFNα2a has been determined in solution by NMR spectroscopy ...

    Enzymatic addition of GalNAc to isotopically labeled IFNα2a produced in Escherichia coli yielded the O-linked glycoprotein GalNAcα-[(13)C,(15)N]IFNα2a. The three-dimensional structure of GalNAcα-IFNα2a has been determined in solution by NMR spectroscopy at high resolution. Proton-nitrogen heteronuclear Overhauser enhancement measurements revealed that the addition of a single monosaccharide unit at Thr-106 significantly slowed motions of the glycosylation loop on the nanosecond time scale. Subsequent addition of a Gal unit produced Gal(β1,3)GalNAcα-[(13)C,(15)N]IFNα2a. This extension resulted in a further decrease in the dynamics of this loop. The methodology used here allowed the first such description of the structure and dynamics of an O-glycoprotein and opens the way to the study of this class of proteins.


    Organizational Affiliation

    Centre for Vaccine Evaluation, Biologics and Genetic Therapies Directorate, Health Canada, Ottawa, Ontario K1A 0K9, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Interferon alpha-2 A166Homo sapiensMutation(s): 0 
Gene Names: IFNA2IFNA2AIFNA2BIFNA2C
Find proteins for P01563 (Homo sapiens)
Explore P01563 
Go to UniProtKB:  P01563
NIH Common Fund Data Resources
PHAROS:  P01563
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
A2G
Query on A2G

Download Ideal Coordinates CCD File 
A
2-acetamido-2-deoxy-alpha-D-galactopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-CBQIKETKSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 
  • OLDERADO: 2LMS Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-05
    Type: Initial release
  • Version 1.1: 2013-05-01
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary