ORFV002 is a novel orf viral protein (117 Aa) that inhibits nuclear events through the regulation of the transcriptional activity of NF-κB, a master regulator of human gene expression (Diel et al., J Virol 2011, 85, 264–275). It is identified as the first nuclear inhibitor of NF-κB produced by orf virus (ORFV) and no homologues in other genera of the Chordopoxvirinae subfamily have been reported to date (Diel et al., J Virol 2011, 85, 264–275). Our molecular structure predictions suggest that ORFV002 may mimic part of IκB, an inhibitor and natural human partner of NF-κB. Recent advances in total chemical synthesis of proteins have provided solutions in overcoming challenges of current recombinant methods of protein isolation for structure elucidation. Aided by Boc solid phase peptide synthesis and native chemical ligation, ORFV002 was successfully synthesized in multimilligram amounts in good yield and high purity. © 2013 Wiley Periodicals, Inc. Biopolymers (Pept Sci) 102: 137–144, 2014.
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