1fyh
From Proteopedia
(New page: 200px<br /> <applet load="1fyh" size="450" color="white" frame="true" align="right" spinBox="true" caption="1fyh, resolution 2.04Å" /> '''1:1 COMPLEX BETWEEN...) |
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caption="1fyh, resolution 2.04Å" /> | caption="1fyh, resolution 2.04Å" /> | ||
'''1:1 COMPLEX BETWEEN AN INTERFERON GAMMA SINGLE-CHAIN VARIANT AND ITS RECEPTOR'''<br /> | '''1:1 COMPLEX BETWEEN AN INTERFERON GAMMA SINGLE-CHAIN VARIANT AND ITS RECEPTOR'''<br /> | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1FYH is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with CL as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http:// | + | 1FYH is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=CL:'>CL</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FYH OCA]. |
==Reference== | ==Reference== | ||
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[[Category: fibronectin type-iii]] | [[Category: fibronectin type-iii]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri Feb 15 15:49:52 2008'' |
Revision as of 13:49, 15 February 2008
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1:1 COMPLEX BETWEEN AN INTERFERON GAMMA SINGLE-CHAIN VARIANT AND ITS RECEPTOR
Contents |
Overview
BACKGROUND: Interferon-gamma (IFN-gamma) is a homodimeric cytokine that, exerts its various activities by inducing the aggregation of two different, receptors. The alpha chain receptor (IFN-gammaRalpha) is a high affinity, receptor that binds to IFN-gamma in a symmetric bivalent manner to form a, stable, intermediate 1:2 complex. This intermediate forms a binding, template for the subsequent binding of two copies of the second receptor, beta chain receptor (IFN-gammaRbeta), producing the active 1:2:2 signaling, complex. RESULTS: A single chain monovalent variant of IFN-gamma, (scIFN-gamma) was constructed and complexed to one copy of the, extracellular domain (ECD) of IFN-gammaRalpha. The structure of this 1:1, complex was determined and the hormone-receptor interface shown to be, characterized by a number of hydrophilic interactions mediated by several, highly ordered water networks. The scIFN-gamma interface consists of, segments from each of the monomer chains of the homodimer. The principal, hydrophobic contact of the receptor involves a tripeptide segment of the, receptor having an unusual and high energy conformation. Despite, containing only one binding site for IFN-gammaRalpha, the monovalent, scIFN-gamma molecule has significant activity in antiviral biological, assays. CONCLUSIONS: ScIFN-gamma binds the ECD of IFN-gammaRalpha through, a highly hydrated interface with an important set of hormone-receptor, contacts mediated through structured waters. Although the interface is, highly hydrated, it supports tight binding and has a considerable degree, of specificity. The biological activity of scIFN-gamma confirms that the, scIFN-gamma:IFN-gammaRalpha complex represents a productive intermediate, and that it can effectively recruit the other required component, IFN-gammaRbeta, to signal based on the 1:1:1 complex.
Disease
Known diseases associated with this structure: AIDS, rapid progression to OMIM:[147570], Aplastic anemia OMIM:[147570], BCG infection, generalized familial OMIM:[107470], H. pylori infection, susceptibility to OMIM:[107470], Hepatitis C virus, resistance to OMIM:[147570], Interferon, immune, deficiency OMIM:[147570], Mycobacterial infection, atypical, familial disseminated OMIM:[107470], TSC2 angiomyolipomas, renal, modifier of OMIM:[147570], Tuberculosis, susceptibility to OMIM:[107470], Tuberculosis, susceptibility to OMIM:[147570]
About this Structure
1FYH is a Protein complex structure of sequences from Homo sapiens with as ligand. Full crystallographic information is available from OCA.
Reference
The structure and activity of a monomeric interferon-gamma:alpha-chain receptor signaling complex., Randal M, Kossiakoff AA, Structure. 2001 Feb 7;9(2):155-63. PMID:11250200
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