3ega

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Crystal structure of Pellino2 FHA Domain at 1.8 Angstroms resolution

Structural highlights

3ega is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.8Å
Ligands:MSE, SO4
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PELI2_HUMAN E3 ubiquitin ligase catalyzing the covalent attachment of ubiquitin moieties onto substrate proteins. Involved in the TLR and IL-1 signaling pathways via interaction with the complex containing IRAK kinases and TRAF6. Mediates IL1B-induced IRAK1 'Lys-63'-linked polyubiquitination and possibly 'Lys-48'-linked ubiquitination. May be important for LPS- and IL1B-induced MAP3K7-dependent, but not MAP3K3-dependent, NF-kappa-B activation. Can activate the MAP (mitogen activated protein) kinase pathway leading to activation of ELK1.[1] [2] [3] [4] [5]

Publication Abstract from PubMed

Pellino proteins are RING E3 ubiquitin ligases involved in signaling events downstream of the Toll and interleukin-1 (IL-1) receptors, key initiators of innate immune and inflammatory responses. Pellino proteins associate with and ubiquitinate proteins in these pathways, including the interleukin-1 receptor associated kinase-1 (IRAK1). We determined the X-ray crystal structure of a Pellino2 fragment lacking only the RING domain. This structure reveals that the IRAK1-binding region of Pellino proteins consists largely of a previously unidentified forkhead-associated (FHA) domain. FHA domains are well-characterized phosphothreonine-binding modules, and this cryptic example in Pellino2 can drive interaction of this protein with phosphorylated IRAK1. The Pellino FHA domain is decorated with an unusual appendage or "wing" composed of two long inserts that lie within the FHA homology region. Delineating how this E3 ligase associates with substrates, and how these interactions are regulated by phosphorylation, is crucial for a complete understanding of Toll/IL-1 receptor signaling.

Pellino proteins contain a cryptic FHA domain that mediates interaction with phosphorylated IRAK1.,Lin CC, Huoh YS, Schmitz KR, Jensen LE, Ferguson KM Structure. 2008 Dec 10;16(12):1806-16. PMID:19081057[6]

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

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Citations
9 reviews cite this structure
Recent insights into the structure of Toll-like receptors and post-translational modifications of their associated signalling proteins.
Carpenter et al. (2009)
8 more
24 other articles
No citations found

References

  1. ↑ Jensen LE, Whitehead AS. Pellino2 activates the mitogen activated protein kinase pathway. FEBS Lett. 2003 Jun 19;545(2-3):199-202. PMID:12804775
  2. ↑ Strelow A, Kollewe C, Wesche H. Characterization of Pellino2, a substrate of IRAK1 and IRAK4. FEBS Lett. 2003 Jul 17;547(1-3):157-61. PMID:12860405
  3. ↑ Butler MP, Hanly JA, Moynagh PN. Kinase-active interleukin-1 receptor-associated kinases promote polyubiquitination and degradation of the Pellino family: direct evidence for PELLINO proteins being ubiquitin-protein isopeptide ligases. J Biol Chem. 2007 Oct 12;282(41):29729-37. Epub 2007 Aug 3. PMID:17675297 doi:http://dx.doi.org/10.1074/jbc.M704558200
  4. ↑ Ordureau A, Smith H, Windheim M, Peggie M, Carrick E, Morrice N, Cohen P. The IRAK-catalysed activation of the E3 ligase function of Pellino isoforms induces the Lys63-linked polyubiquitination of IRAK1. Biochem J. 2008 Jan 1;409(1):43-52. PMID:17997719 doi:10.1042/BJ20071365
  5. ↑ Kim TW, Yu M, Zhou H, Cui W, Wang J, DiCorleto P, Fox P, Xiao H, Li X. Pellino 2 is critical for Toll-like receptor/interleukin-1 receptor (TLR/IL-1R)-mediated post-transcriptional control. J Biol Chem. 2012 Jul 20;287(30):25686-95. doi: 10.1074/jbc.M112.352625. Epub, 2012 Jun 5. PMID:22669975 doi:http://dx.doi.org/10.1074/jbc.M112.352625
  6. ↑ Lin CC, Huoh YS, Schmitz KR, Jensen LE, Ferguson KM. Pellino proteins contain a cryptic FHA domain that mediates interaction with phosphorylated IRAK1. Structure. 2008 Dec 10;16(12):1806-16. PMID:19081057 doi:10.1016/j.str.2008.09.011

Contents


PDB ID 3ega

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OCA

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