ASFV proteins R238L and R298L bind SP2 and KLF6 transcription factors, downregulating genes for lung collagen formation and cell adhesion, disrupting these pathways.
ASFV proteins R238L and R298L disrupt host collagen matrix integrity and cell adhesion by targeting transcription factors SP2 and KLF6, revealing a novel mechanism of viral pathogenesis.
Absolute Event Rate: 0% vs 0%
The regulatory mechanisms of collagen formation and cell adhesion pathways during African Swine Fever Virus (ASFV) infection remain poorly understood. This study aims to investigate whether ASFV manipulates these pathways by targeting host transcriptional regulators. Through weighted Kendall correlation analysis of transcription factor binding sites (TFBSs) in differentially expressed genes (DEGs) from the lung tissue of ASFV-recovered pigs, we identified SP2 and KLF6 as key transcription factors (TFs) associated with collagen synthesis and cell adhesion, respectively. Domain–domain interaction prediction, followed by Förster resonance energy transfer (FRET) assays, confirmed that the ASFV proteins R238L and R298L directly bind to the zf-C2H2 domains of SP2 and KLF6. Furthermore, overexpression of R238L and R298L in HeLa and 3D4/21 cells significantly downregulated SP2 and KLF6 target genes involved in these pathways. Our findings reveal a novel mechanism by which ASFV proteins R238L and R298L interfere with host transcription factors SP2 and KLF6, potentially disrupting collagen matrix integrity and cell adhesion to facilitate viral pathogenesis.
Niu et al. (Sat,) reported a other. ASFV proteins R238L and R298L bind SP2 and KLF6 transcription factors, downregulating genes for lung collagen formation and cell adhesion, disrupting these pathways.