Alternative reference database for taxonomy assignment when processing FASTQ

We’re keen to perform the taxonomy assignment using a database that is not avaliable on Microbiome Analyst at the moment. The samples we work on are from the oral cavity, so silva and greengenes are not the most suitable.

Currently, we’re interested in using a summary index to analyse the 16s rRNA sequencing data. We previously used the silva database avaliable on the Microbiome Analyst, but have been asked to use the reference database for taxonomy assignments which the index was based on. I’ve attached the link for downloading the taxonomy files. They are in a .fasta and .taxonomy format which cannot be uploaded here.
Thank you!

Taxonomy Files