SPRY Domain is named from SPla and the RYanodine Receptor and it is found in many eukaryotic proteins with a wide range of functions. It is a protein-interaction module involved in many important signalling pathways like RNA processing, regulation of histone H3 methylation, innate immunity or embryonic development [1,2,3,4]. It can be divided into 11 subfamilies based on amino acid sequence similarity or the presence of additional protein domains. The greater SPRY family is divided into the SPRY/B30.2 (which contains a PRY extension at the N-terminal) and SPRY-only sub-families which are preceded by a subdomain that is structurally similar to the PRY region [2]. SPRY/B30.2 structures revealed a bent beta-sandwich fold comprised of two beta-sheets. Distant homologues are domains in butyrophilin/ marenostrin/pyrin [1].

1: SPRY domains in ryanodine receptors (Ca(2+)-release channels). Ponting C, Schultz J, Bork P; Trends Biochem Sci 1997;22:193-194. PMID:9204703

2: Structural basis for protein recognition by B30.2/SPRY domains. Woo JS, Suh HY, Park SY, Oh BH; Mol Cell. 2006;24:967-976. PMID:17189197

3: Structure and function of the SPRY/B30.2 domain proteins involved in innate immunity. D'Cruz AA, Babon JJ, Norton RS, Nicola NA, Nicholson SE; Protein Sci. 2013;22:1-10. PMID:23139046

4: SPRYSEC Effectors: A Versatile Protein-Binding Platform to Disrupt Plant Innate Immunity. Diaz-Granados A, Petrescu AJ, Goverse A, Smant G; Front Plant Sci. 2016;7:1575. PMID:27812363