The domain within your query sequence starts at position 1 and ends at position 510; the E-value for the 3gzn domain shown below is < 1e-12.
MAQPGKILKEQKYDRQLRLWGDHGQEALESAHVCLINATATGTEILKNLVLPGIGSFTII
DGNLVSGEDAGNNFFLQKSSIGKSPENLLDNDPSFFCRFTIVVATQLLESTLLRLADVLW
NSQIPLLICRTYGLVGYMRIIIKEHPVIESHPDNALEDLRLDKPFPELREHLQSYDLDHM
EKKDHSHTPWIVIIAKYLAQWYNETNGRIPKSYKEKEDFRDLIRQGILKNENGAPEDEEN
FEEAIKNVNTALNTTQIPSSIEDIFNDDRCINITKQTPTFWILARALKEFVAKEGQGNLP
VRGTIPDMIADSNKYIKLQNVYREKAKKDAAAVGNHVAKLLQSVGQAPESISEKELKLLC
SNSAFLRVVRCRSLAEEYGLDTVNKDEIISSMDNPDNEIVLYLMLRAVDRFHKQHGRYPG
VSNYQVEEDIGKLKSCLTGFLQEYGLSVMVKDDYVHEFCRYGAAEPHTIAAFLGGAAAQE
VIKIITKQFVIFNNTYIYSGMSQTSATFQL
This is a PDB domain - please see the PDBSUM entry of 3gzn for further annotation