The domain within your query sequence starts at position 109 and ends at position 314; the E-value for the MCU domain shown below is 4.4e-68.

LQNEDKGIKTAAIITADGSEIPASTLMDTLLMTDFKLIINKLRYDIRCHKKEEPSGEHMT
ELENTKSLVHRLFTILHLEEIQKRRERHLMAKIDHLQEQLRPLEQVKAAIEARSEANTSG
LLWAGLALLSVQGGALAWLTWWVYSWDIMEPVTFFLSFANSIVFFAYFIITRQNYTYSSL
RSRQFLQFFHKKSQRRCFDVEQYNKL

MCU

 MCU
PFAM accession number:PF04678
Interpro abstract (IPR006769):

This entry represents the C-terminal domain of MCU, which is a mitochondrial inner membrane calcium uniporter that mediates calcium uptake into mitochondria [ (PUBMED:21685888) (PUBMED:21685886) (PUBMED:23101630) ]. This domain can also be found in MCUb, which negatively regulates the activity of MCU [ (PUBMED:23900286) ].

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