A HMGB1 homologue (SsHMGB1) was identified and characterized.
Expression of SsHMGB1 in macrophages could be induced by Listonella anguillarum.
Recombinant SsHMGB1 purified from E. coli was able to bind with DNA fragments.
Recombinant SsHMGB1 possesses apparent immunoregulatory property and is likely to be involved in anti-bacterial infection.