PSMD: Pan-Species Microsatellite Database

Microsatellites (simple repeat sequences, SSRs or short tandem repeats, STRs), are tandem repeats of short DNA motifs with length of 1-6 bp which have extensively been exploited as powerful genetic markers for diversity applications, and are involved in gene regulation as well as implicated in numerous genetic diseases even in cancers. PSMD was developed as a web-based comprehensive database comprising 678,106,741 perfect microsatellites and 43,848,943 compound microsatellites from 18,408 organisms covered almost all species with available genomic data. PSMD enables scientists to easily browse, filter, compare, download SSRs with relevant information.


Perfect Microsatellites (SSRs)Compound Microsatellites (CMs)Genic SSRsGenic CMsCoding SSRsCoding CMs

Related Database


  • Current Version 1.4
  • Last Updated Jul 16, 2020


Version 1.4
Jul 16, 2020

Fixed overview statistical report exporting error. Fixed krait online tool with no results for selected genomes.

Version 1.3
Sep 17, 2019

Added a search function for users to search a species by name, accession and taxonomy. Added support for checking primer location. Fixed some bugs.

Version 1.2
May 16, 2019

We have added documentation, added support for exporting plot data and improved download speed.

Version 1.1
May 10, 2019

Download function was added to overview page for exporting statistics; plot display error when no compound microsatellite found was fixed.

Version 1.0
Apr 12, 2019

The first version of PSMD was released and is online now


  • Lianming Du Chengdu University
  • Zhenxin Fan Sichuan University
  • Bisong Yue Sichuan University


Du L, Liu Q, Zhao K, Tang J, Zhang X, Yue B, Fan Z. 2020. PSMD: An extensive database for pan-species microsatellite investigation and marker development. Molecular Ecology Resources. 20(1):283-291. PMID DOI