The domain within your query sequence starts at position 1 and ends at position 28; the E-value for the tRNA_SAD domain shown below is 3.2e-9.

MSVDLCRGPHLRHTGQIGALKLLTEQEL

tRNA_SAD

tRNA_SAD
PFAM accession number:PF07973
Interpro abstract (IPR012947):

The catalytically active form of threonyl/alanyl tRNA synthetase is a dimer. Within the tRNA synthetase class II dimer, the bound tRNA interacts with both monomers making specific interactions with the catalytic domain, the C-terminal domain, and this SAD domain (the second additional domain). The second additional domain is comprised of a pair of perpendicularly orientated antiparallel beta sheets, of four and three strands, respectively, that surround a central alpha helix that forms the core of the domain [(PUBMED:10319817)].

GO process:tRNA aminoacylation (GO:0043039)
GO function:aminoacyl-tRNA ligase activity (GO:0004812), ATP binding (GO:0005524)

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