This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

2pi0

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 02:53, 10 September 2015

Crystal Structure of IRF-3 bound to the PRDIII-I regulatory element of the human interferon-B enhancer

Structural highlights

2pi0 is a 6 chain structure with sequence from Human. The February 2010 RCSB PDB Molecule of the Month feature on Enhanceosome by David Goodsell is 10.2210/rcsb_pdb/mom_2010_2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	IRF3 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[IRF3_HUMAN] Key transcriptional regulator of type I interferon (IFN)-dependent immune responses and plays a critical role in the innate immune response against DNA and RNA viruses. Regulates the transcription of type I IFN genes (IFN-alpha and IFN-beta) and IFN-stimulated genes (ISG) by binding to an interferon-stimulated response element (ISRE) in their promoters. Acts as a more potent activator of the IFN-beta (IFNB) gene than the IFN-alpha (IFNA) gene and plays a critical role in both the early and late phases of the IFNA/B gene induction. Found in an inactive form in the cytoplasm of uninfected cells and following viral infection, double-stranded RNA (dsRNA), or toll-like receptor (TLR) signaling, becomes phosphorylated by IKBKE and TBK1 kinases. This induces a conformational change, leading to its dimerization and nuclear localization and association with CREB binding protein (CREBBP) to form dsRNA-activated factor 1 (DRAF1), a complex which activates the transcription of the type I IFN and ISG genes. Can activate distinct gene expression programs in macrophages and can induce significant apoptosis in primary macrophages.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Interferon regulatory factor 3 (IRF-3) is a key transcription factor in the assembly of the mammalian interferon-beta (IFN-beta) enhanceosome. We present here the structure of IRF-3 DNA binding domain in complex with the complete PRDIII-I regulatory element of the human IFN-beta enhancer. We show that four IRF-3 molecules bind in tandem to, variably spaced, consensus and nonconsensus IRF sites on the composite element. The ability of IRF-3 to bind these variable sites derives in part from two nonconserved arginines (Arg78 and Arg86) that partake in alternate protein-DNA contacts. We also show that the protein-DNA contacts are highly overlapped and that all four IRF sites are required for gene activation in vivo. In addition, we show that changing the nonconsensus IRF sites to consensus sites creates a more efficient enhancer in vivo. Together, the structure and accompanying biological data provide insights into the assembly of the IFN-beta enhanceosome in mammals.

Structure of IRF-3 bound to the PRDIII-I regulatory element of the human interferon-beta enhancer.,Escalante CR, Nistal-Villan E, Shen L, Garcia-Sastre A, Aggarwal AK Mol Cell. 2007 Jun 8;26(5):703-16. PMID:17560375^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Escalante CR, Nistal-Villan E, Shen L, Garcia-Sastre A, Aggarwal AK. Structure of IRF-3 bound to the PRDIII-I regulatory element of the human interferon-beta enhancer. Mol Cell. 2007 Jun 8;26(5):703-16. PMID:17560375 doi:10.1016/j.molcel.2007.04.022

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2pi0"

@@ Line 2: / Line 2: @@
 <StructureSection load='2pi0' size='340' side='right' caption='[[2pi0]], [[Resolution|resolution]] 2.31&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2pi0]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The February 2010 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Enhanceosome''  by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2010_2 10.2210/rcsb_pdb/mom_2010_2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PI0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2PI0 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2pi0]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. The February 2010 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Enhanceosome''  by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2010_2 10.2210/rcsb_pdb/mom_2010_2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PI0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2PI0 FirstGlance]. <br>
-</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">IRF3 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
+</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">IRF3 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2pi0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2pi0 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2pi0 RCSB], [http://www.ebi.ac.uk/pdbsum/2pi0 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2pi0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2pi0 OCA], [http://pdbe.org/2pi0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2pi0 RCSB], [http://www.ebi.ac.uk/pdbsum/2pi0 PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2pi0" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 34: / Line 35: @@
 </StructureSection>
 [[Category: Enhanceosome]]
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: RCSB PDB Molecule of the Month]]
 [[Category: Aggarwal, A K]]

2pi0

From Proteopedia

Revision as of 02:53, 10 September 2015

Crystal Structure of IRF-3 bound to the PRDIII-I regulatory element of the human interferon-B enhancer

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox