The domain within your query sequence starts at position 1 and ends at position 121; the E-value for the GREB1 domain shown below is 4.5e-61.

XVTYQQTVFHVWHSGVLLELGLEKEPVTKQRAEQHVLKLDTEAQARFKAFLQNSFQNPHT
LFVLIHDHAHWDLVSAVHNIYSQSDPSVGLVDRLLNCREVKEAPNIVTLHVTSFPYALQT
Q

GREB1

GREB1
PFAM accession number:PF15782
Interpro abstract (IPR028422): GREB1 (gene regulated in breast cancer 1 protein) may play a role in estrogen-stimulated cell proliferation. It acts as a regulator of hormone-dependent cancer growth in breast and prostate cancers [(PUBMED:15986123), (PUBMED:16496412)].

This is a PFAM domain. For full annotation and more information, please see the PFAM entry GREB1