Here is more information about the actual HIV gene itself: https://www.zerohedge.com/health/coronavirus-hiv-mutation-suggests-nearly-1000x-more-likely-sars-infect

Other highly contagious viruses, including HIV and Ebola, target an enzyme called furin, which works as a protein activator in the human body. Many proteins are inactive or dormant when they are produced and have to be “cut” at specific points to activate their various functions.

When looking at the genome sequence of the new coronavirus, Professor Ruan Jishou and his team at Nankai University in Tianjin found a section of mutated genes that did not exist in Sars, but were similar to those found in HIV and Ebola

So basically the little hooks on the outside of the virus (the points on the crown, if you will) have the HIV-style hooks, which has never been seen before in a coronavirus.