2OQP

Solution structure of human interleukin-21


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 64 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The existence of multiple conformers of interleukin-21 directs engineering of a superpotent analogue.

Bondensgaard, K.Breinholt, J.Madsen, D.Omkvist, D.H.Kang, L.Worsaae, A.Becker, P.Schiodt, C.B.Hjorth, S.A.

(2007) J.Biol.Chem. 282: 23326-23336

  • DOI: 10.1074/jbc.M701313200

  • PubMed Abstract: 
  • The high resolution three-dimensional structure of human interleukin (hIL)-21 has been resolved by heteronuclear NMR spectroscopy. Overall, the hIL-21 structure is dominated by a well defined central four-helical bundle, arranged in an up-up-down-dow ...

    The high resolution three-dimensional structure of human interleukin (hIL)-21 has been resolved by heteronuclear NMR spectroscopy. Overall, the hIL-21 structure is dominated by a well defined central four-helical bundle, arranged in an up-up-down-down topology, as observed for other cytokines. A segment of the hIL-21 molecule that includes the third helical segment, helix C, is observed to exist in two distinct and interchangeable states. In one conformer, the helix C segment is presented in a regular, alpha-helical conformation, whereas in the other conformer, this segment is largely disordered. A structure-based sequence alignment of hIL-21 with receptor complexes of the related cytokines, interleukin-2 and -4, implied that this particular segment is involved in receptor binding. An hIL-21 analog was designed to stabilize the region around helix C through the introduction of a segment grafted from hIL-4. This novel hIL-21 analog was demonstrated to exhibit a 10-fold increase in potency in a cellular assay.


    Organizational Affiliation

    Novo Nordisk A/S, Biopharmaceuticals Research Unit, DK-2760 Måløv, Denmark. kbaa@novonordisk.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-21
A
134Homo sapiensMutation(s): 0 
Gene Names: IL21
Find proteins for Q9HBE4 (Homo sapiens)
Go to Gene View: IL21
Go to UniProtKB:  Q9HBE4
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 64 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2OQP Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-06-19
    Type: Initial release
  • Version 1.1: 2007-10-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance