The domain within your query sequence starts at position 2123 and ends at position 2157; the E-value for the MEF2_binding domain shown below is 5.7e-26.

TLLSPKGSISEETKQKLKSAILSAQSAANVRKESL

MEF2_binding

MEF2_binding
PFAM accession number:PF09047
Interpro abstract (IPR015134):

The myocyte enhancer factor-2 (MEF2) binding domain, predominantly found in the calcineurin-binding protein CABIN 1, adopts an amphipathic alpha-helical structure, which allows it to bind a hydrophobic groove on the MEF2S domain, forming a triple-helical interaction. Interaction of this domain with MEF2 causes repression of transcription [(PUBMED:12700764)].

This is a PFAM domain. For full annotation and more information, please see the PFAM entry MEF2_binding