LIGASE, 2'-5' RNA LIGASE-LIKE PROTEIN, HXTX MOTIF, PYROCOCCUS FURIOSUS, STRUCTURAL GENOMICS, NPPSFA, NATIONAL PROJECT ON PROTEIN STRUCTURAL AND FUNCTIONAL ANALYSES, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI 2FYH SOLUTION STRUCTURE OF THE 2'-5' RNA LIGASE-LIKE PROTEIN FROM PYROCOCCUS FURIOSUS