Secreted effector that suppresses plant basal defense and promotes plant susceptibility via targeting promoters of host HSP gene and thus inhibiting their expression. CRN108 binds directly to heat shock elements (HSEs) 5'-GAAnnTTC-3' and interferes with the association of the HSE with the plant heat shock transcription factors, which initializes HSP gene expression in response to stress. Expressed at a high level during the early stages of infection. The CRN proteins have modular architectures that include a signal peptide, a conserved N-terminus, and highly diverse C-terminal domains. The conserved CRN N-terminus harbors a distinct LXLFLAK motif, which is followed by the conserved DWL domain. A highly conserved HVLVXXP motif marks the end of the CRN N-terminal domains and forms a junction where diverse C-terminal domains are fused. The conserved CRN N-terminus mediates the translocation into the plant host cells. The C-terminal DC effector region contains a helix-hairpin-helix (HhH) DNA-binding domain involved in the binding to heat shock elements (HSEs), which are conserved in the promoter regions of HSP genes at promoters of targeted heat shock protein coding genes. Belongs to the Crinkler effector family.