The domain within your query sequence starts at position 521 and ends at position 789; the E-value for the BCAS3 domain shown below is 1e-33.

PSLMVVTPLAQIKQPMTLGTITKRTGPYLFGAGCFSIKAPCKVKSPPQISPSKSMGGEFC
VAAVFGTSRSWFANNAGLKREKDQSKQVVVESLYIISCYGTLVEHMIEPRPISTAPKISD
DTPLEIMTSPRASWTLVRTPQWNELQPPFNANHPLLLAAEAVQYYQLLLAGSLPPGSPGP
ITRHGSYDSLASDHSGQEDEEWLSQVEIVTHTGPHRRLWMGPQFHFKTIQTSGQTTVIST
SSSVLQSHGPSDTPQPLLDFDTDDLDLNS

BCAS3

 BCAS3
PFAM accession number:PF12490
Interpro abstract (IPR022175):

This domain is found in eukaryotes, and is typically between 229 and 245 amino acids in length. It is found in BCAS3, a proto-oncogene implicated in the development of breast cancer [ (PUBMED:17505058) ]. In plants, this domain is found in autophagy-related protein 18 [ (PUBMED:29089429) ].

This is a PFAM domain. For full annotation and more information, please see the PFAM entry BCAS3