pfam03479: PCC (This model is not part of the current CDD release)
Plants and Prokaryotes Conserved (PCC) domain
This is a Plants and Prokaryotes Conserved (PPC) domain found in proteins that contain AT-hook motifs pfam02178 which strongly suggests a DNA-binding function for the proteins as a whole. Proteins with PPC domains are found in Bacteria, Archaea and the plant kingdom. The PPC domain has a single alpha-helix packed against an antiparallel beta-sheet, which is formed by five beta-strands. There are three highly conserved histidine residues,which appear to form a zinc-binding site, and the domain has been observed to form homotrimers. The domain co-occurs with a thioredoxin-like domain in uncharacterized cyanobacterial proteins.
Jiyao W et al.(2023). "The conserved domain database in 2023.",