SILVA Expert Database

SILVA is a comprehensive resource for quality checked and aligned ribosomal RNA sequence data.


  • 4,478,614 distinct sequences from 449,145 organisms contributed to RNAcentral
  • the shortest sequence has 300 nucleotides, the longest 3,999
  • the average length is 911 nucleotides
  • database version: 122

Example entries

URS00005A14E2, URS00004DD3DC, URS0000224E47

Browse all SILVA sequences



The SILVA ribosomal RNA gene database project: improved data processing and web-based tools.
Quast C., Pruesse E., Yilmaz P., Gerken J., Schweer T., Yarza P., Peplies J., Glockner F.O. Nucleic Acids Res. 2013 Jan;41(Database issue):D590-6

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