The domain within your query sequence starts at position 6 and ends at position 84; the E-value for the WRW domain shown below is 2.8e-22.

PLKEKKLMEVKLGELPSWIMMRDFTPSGIAGAFRRGYDRYYNKYINVRKGSISGISMVLA
AYVVFSYCISYKELKHERR

WRW

WRW
PFAM accession number:PF10206
Interpro abstract (IPR019344):

This entry represents small proteins of approximately 110 amino acids, which are highly conserved from nematodes to humans. Some have been annotated in Swiss-Prot as being the f subunit of mitochondrial F1F0-ATP synthase but this could not be confirmed. The sequence has a well-conserved WRW motif. The exact function of the protein is not known.

This is a PFAM domain. For full annotation and more information, please see the PFAM entry WRW