YflT is a heat induced protein. According to AlphaFold this domain is composed of a core of four beta strands that form a central beta sheet with alpha helices packed on both side. This family shows sequence similarity to Pfam:PF11821 which includes the ActD protein which forms an accessory component of the Alternative complex III which catalyses the oxidation of membrane-bound quinol and the reduction of cytochrome c or an equivalent electron carrier. This suggests that members of this family may also be involved in forming larger redox complexes.

1: Identification of proteins involved in the heat stress response of Bacillus cereus ATCC 14579. Periago PM, van Schaik W, Abee T, Wouters JA; Appl Environ Microbiol. 2002;68:3486-3495. PMID:12089032