The domain within your query sequence starts at position 31 and ends at position 109; the E-value for the MNNL domain shown below is 2.8e-31.

ASGQFELEILSMQNVNGELQNGNCCGGVRNPGDRKCTRDECDTYFKVCLKEYQSRVTAGG
PCSFGSGSTPVIGGNTFNL

MNNL

MNNL
PFAM accession number:PF07657
Interpro abstract (IPR011651):

This entry represents a region of conserved sequence at the N terminus of several Notch ligand proteins, including Delta-like protein 1 (DLL1) and 4 (DLL4) [ (PUBMED:25715738) (PUBMED:25700513) ].

GO process:multicellular organism development (GO:0007275), Notch signaling pathway (GO:0007219)
GO component:integral component of membrane (GO:0016021)

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