The product of gene 37 (28052,28756) in Darolasnstone has a couple of nice HHPred matches (95-96% probability, 61% coverage, E value of 0.027) to the Bacteriophage Mu Gam protein.
"This family consists of bacterial and phage Gam proteins. The gam gene of bacteriophage Mu encodes a protein which protects linear double stranded DNA from exonuclease degradation in vitro and in vivo"

There is a nice paper suggesting homology between Gam and Ku (which is on approved list)

I'd like to suggest we add Gam-like host-nuclease inhibitor protein to the function list