The domain within your query sequence starts at position 656 and ends at position 859; the E-value for the GAIN domain shown below is 1e-46.

GLPGEGVSEVIQTLLEISQDGTSYSGDLLSTIDVLRNMTEIFRRAYYSPTPGDVQNFVQI
ISNLLAEENRDKWEEAQLMGPNAKELFRLVEDFVDVIGFRMKDLRDAYQVTDNLVLSIHK
LPASGATDISFPMKGWRATGDWAKVPEDRVTVSKSVFSTGLAEADDSSVFVVGTVLYRNL
GSFLALQRNTTVLNSKVISVTVKP

GAIN

GAIN
PFAM accession number:PF16489
Interpro abstract (IPR032471):

This entry represents the N-terminal region of the GAIN domain. The full GAIN domain, comprises this domain and the GPS motif (IPR000203), can be found in cell-adhesion GPCRs, and is the functional unit for autoproteolysis. The GPS motif is an ancient domain that exists in primitive ancestor organisms, and the full GAIN domain is conserved in all cell-adhesion GPCRs and all PKD1-related proteins [(PUBMED:22333914)].

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