Thoeris is a bacterial antiphage defense system, which consists of two genes, thsA and thsB, via NAD+ degradation [1-4]. ThsA has robust NAD+ cleavage activity and and a two-domain architecture containing a N-terminal NAD-binding domain (denoted as s ...
Thoeris is a bacterial antiphage defense system, which consists of two genes, thsA and thsB, via NAD+ degradation [1-4]. ThsA has robust NAD+ cleavage activity and and a two-domain architecture containing a N-terminal NAD-binding domain (denoted as sirtuin-like or Macro) and C-terminal SLOG-like domain. In some instances, such as in B. amyloliquefaciens ThsA has an N-terminal transmembrane domain [1]. ThsB (also referred to as TIR1 and TIR2) is structurally similar to TIR domain proteins but without enzymatic activity. This domain is found at the C-terminal of ThsA proteins which adopts a Rossmann-like fold that binds NAD+/NAD+derivatives. It has been characterised as the SLOG-like domain which binds NAD+ derivatives such as ADPR molecules produced by ThsB, which drives an oligomeric state change in ThsA and activates the NADase activity (represented in Pfam:PF18185) [1,3]. This entry represents the NAD+-binding Macro domain from B. amyloliquefaciens [1,2].
