2oqp
From Proteopedia
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|ACTIVITY= | |ACTIVITY= | ||
|GENE= IL21 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= IL21 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2oqp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2oqp OCA], [http://www.ebi.ac.uk/pdbsum/2oqp PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2oqp RCSB]</span> | ||
}} | }} | ||
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[[Category: multiple conformer]] | [[Category: multiple conformer]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 04:21:50 2008'' |
Revision as of 01:21, 31 March 2008
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| Gene: | IL21 (Homo sapiens) | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Solution structure of human interleukin-21
Overview
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.
About this Structure
2OQP is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
The existence of multiple conformers of interleukin-21 directs engineering of a superpotent analogue., Bondensgaard K, Breinholt J, Madsen D, Omkvist DH, Kang L, Worsaae A, Becker P, Schiodt CB, Hjorth SA, J Biol Chem. 2007 Aug 10;282(32):23326-36. Epub 2007 Jun 12. PMID:17565991
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