Again, matches with non-virus or host proteins may be of interest as biologically and medically important. BLASTp searches on non-viruses with the sequence as query inappropriately pick up a lot of coronaviruses by accidently relating to the host name, but this is indicative of a strong recurrence of the motif across coronaviruses. Otherwise, there is a diverse set of matches especially but not solely with bacterial proteins, and unfortunately most are described as hypothetical proteins for which the function is typically unclear. Of those that are named, there are some indications of involvements with sugar binding in many cases. Many are ribosome proteins or phosphatases relevant directly or indirectly to RNA or ribose binding. The PAP2 superfamily is characterized by a core consisting of a 5-helical bundle and includes functions involving glycerol phosphates but also sugars such as in the case of Glucose-6-phosphatase. This subsequence HWKWPWYIWL also matches sequences in proteins with an SPFH domain which is implicated in regulating targeted protein turnover in stomatins and other membrane-associated proteins. HWKWPWYIWL has of course a notable tryptophan (W) repeat that hints a special role of its own, certainly worthy of analysis but outside present scope. In general, however, it does appear that across many proteins it has other functions than sugar binding (perhaps diverse or multiple functions), although sugar binding is not excluded.