forkhead associated (FHA) domain found in Saccharomyces cerevisiae plasmid maintenance protein 2 (PLM2) and similar proteins
This subfamily includes two homologs PLM2 and TOS4 (also called target of SBF protein 4), which are predicted to be chromatin-associated proteins. They bind to the promoters of genes with functions important for the G1/S (start) transition. PLM2 targets primarily genes involved in DNA synthesis and repair, chromosome segregation, nuclear division, and transcription. TOS4 targets primarily genes involved in pheromone response, polarized growth, and transcription. The FHA domain is a small phosphopeptide recognition module.
Feature 1:putative phosphopeptide binding site [polypeptide binding site]
Evidence:
Comment:based on structures of other FHA domains with bound phosphopeptide
Comment:GR at the C terminus of strand beta3, SRxH just preceding beta5, and motif SxNG in the beta6-beta7 turn indicate a canonical mode of pThr recognition.
Comment:Conserved residues are involved in binding directly to the ligand backbone and phosphate group. Non-conserved residues may determine binding specificity.
Jiyao W et al.(2023). "The conserved domain database in 2023.",