Crystal Structure of Full-Length Human IFIT5 with 5`-triphosphate OligocytidineCrystal Structure of Full-Length Human IFIT5 with 5`-triphosphate Oligocytidine

Structural highlights

4hor is a 2 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 1.861Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

IFIT5_HUMAN Interferon-induced RNA-binding protein that specifically binds single-stranded RNA bearing a 5'-triphosphate group (PPP-RNA), thereby acting as a sensor of viral single-stranded RNAs. Single-stranded PPP-RNAs, which lack 2'-O-methylation of the 5' cap and bear a 5'-triphosphate group instead, are specific from viruses, providing a molecular signature to distinguish between self and non-self mRNAs by the host during viral infection. Directly binds PPP-RNA in a non-sequence-specific manner. Also recognizes and binds tRNAs.[1] [2]

References

  1. Katibah GE, Lee HJ, Huizar JP, Vogan JM, Alber T, Collins K. tRNA Binding, Structure, and Localization of the Human Interferon-Induced Protein IFIT5. Mol Cell. 2013 Feb 21;49(4):743-50. doi: 10.1016/j.molcel.2012.12.015. Epub 2013 , Jan 11. PMID:23317505 doi:http://dx.doi.org/10.1016/j.molcel.2012.12.015
  2. Abbas YM, Pichlmair A, Gorna MW, Superti-Furga G, Nagar B. Structural basis for viral 5'-PPP-RNA recognition by human IFIT proteins. Nature. 2013 Jan 13. doi: 10.1038/nature11783. PMID:23334420 doi:http://dx.doi.org/10.1038/nature11783

4hor, resolution 1.86Å

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