forkhead associated (FHA) domain found in Sulfolobus Acidocaldarius FHA domain-containing protein ArnA and similar proteins
ArnA is an FHA domain-containing protein from Sulfolobus acidocaldarius that was shown to strongly interact with ArnB, a von Willebrand domain-containing protein. They act synergistically and negatively to modulate motility. ArnA is involved in regulating archaella expression in S. acidocaldarius. The FHA domain is a small phosphopeptide recognition module.
Feature 1:putative phosphopeptide binding site [polypeptide binding site]
Evidence:
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.