The domain within your query sequence starts at position 1 and ends at position 299; the E-value for the DUF4569 domain shown below is 3.3e-121.

MLGEAFLTKFLYKEQRHAKLYKPLRCKKTSNDKKENWENKLLDTPDNSLSPLKTGSQEKV
IEGSVTEQDNDSSQIKSMDELPVAKCKCTPLPGNVSVALPIPKRGQEETQLDLYRSWSCT
SICQNYPDLQIGGDHIRNMYDSGCFVEHTYDDVCNGPLLLSVDIPLGHSPKMEPLEKTST
SKLFNGDEIREKSMLLHKQPLSNSMLNNYIERKVDELYKQFLEENLTRCLSITNLMTSSI
LMNNVNQISLQISQEQNIEASKAREALLHSLALCNLRNVSHRNSTELSTPNLQISNQAS

DUF4569

 DUF4569
PFAM accession number:PF15133
Interpro abstract (IPR027869):

This family of proteins is found in eukaryotes and includes human protein CXorf21, which is thought to play a role in the regulation of endolysosomal pH in immune cells such as B-cells, dendritic cells and monocytes [ (PUBMED:31001245) ].

This is a PFAM domain. For full annotation and more information, please see the PFAM entry DUF4569