The domain within your query sequence starts at position 1 and ends at position 429; the E-value for the PAG domain shown below is 8.7e-209.

MGPAGSVLSSGQMQMQMVLWGSLAAVAMFFLITFLVLLCSTCDREKKPRQHSGDHENLMN
VPSDKDMFSHSATSLTTDALASSEQNGVLTNGDILSEDSTLTCMQHYEEVQTSASDLLDS
QDSTGKAKCHQSRELPRIPPENAVDEILTARAADTELGPGVEGPYEVLKDSSSQENMVED
CLYETVKEIKEVADKGQGGKSKSTSALKELQGAPMEGKADFAEYASVDRNKKCRHSANAE
SILGTCSDLDEESPPPVPVKLLDENANLPQEGGGQAEEQAAEGTGGHSKRFSSLSYKSRE
EDPTLTEEEISAMYSSVNKPGQSAHKPGPCMKGPESACHSMKGLPQRSSSSCNDLYATVK
DFEKTPNSISTLPPARRPSEEPEPDYEAIQTLNREDEKVPLETNGHHVPKESDYESIGDL
QQCRDVTRL

PAG

 PAG
PFAM accession number:PF15347
Interpro abstract (IPR032748):

PAG, or Cbp/PAG (Csk binding protein/phospho-protein associated with glycosphingolipid-enriched microdomains) is a transmembrane protein that has a negative regulatory role in T-cell activation through being an adapter for C-terminal Src kinase, Csk. This family of proteins is found in eukaryotes [ (PUBMED:10790433) (PUBMED:11684085) (PUBMED:12612075) (PUBMED:22659621) ].

GO process:intracellular signal transduction (GO:0035556), negative regulation of T cell activation (GO:0050868)
GO component:plasma membrane (GO:0005886), membrane raft (GO:0045121)

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