Threesevens posted the Twatter OP and the source paper.  As with all fear mongering the headlines don't match the article.  Interesting read though.  In a nutshell, it's an old virus that is 90%+ identical with known bat virus. FYI all virus have encoding for proteins to enter host cells and there are more virus that we don't know about than do so by definition most virus have a "mystery middle segment".