The domain within your query sequence starts at position 556 and ends at position 1093; the E-value for the d1b3ua_ domain shown below is 5e-22.

PKERDQLLHILFNLIKRPDDEQRQMILTGCVAFARHVGPTRVEAELLPQCWEQINHKYPE
RRLLVAESCGALAPYLPKEIRSSLVLSMLQQMLMEDKADLVREAVIKSLGIIMGYIDDPD
KYQQGFELLLSALGDPSERVVSATHQVFLPAYAAWTTELGNLQSHLIPTLLNKIEKLLRE
GEHGLDEHKLHMYLSALQSLIPSLFALVLQNAPFSSKAKLHGEVPHIEVTRFPRPMSPLQ
DVSTIIGSREQLAVLLQLYDYQLEHEGTTGWESLLWVVNQLLPQLIEIVGKINVTSTACV
HEFSRFFWRLCRTFGKIFTNTKVKPQFQEILRLSEENIDSSAGNGVLTKATVPIYATGVL
TCYIQEEDRKLLVGFLEDVMTLLSLSHAPLDSLKASFVELGANPAYHELLLTVLWYGVVH
TSALVRCTAARMFELTLRGMSEALVDKRVAPALVTLSGDPEFSVRIATIPAFGTIMETVI
QRELLERVKMQLASFLEDPQYQDQHSLHTEVIRTFGRVGPNAEPRFRDEFVIPHLHKL

This is a SCOP domain - please see the SCOP entry of d1b3ua_ for further annotation