Table 1. Involvement of the SUMO pathways in DNA repair in yeast.

Protein	SUMO pathway	Function in genome stability
Ubc9	SUMO E2 conjugase	Sister chromatid exchange 37 Resolution of recombination intermediate 27
Mms21	SUMO E3 ligase	Sister chromatid exchange 37 Resolution of recombination intermediate 27 ALT maintenance of telomeres 21
Siz1	SUMO E3 ligase	PCNA sumoylation (recruit Srs2) 44, 45
Ulp1	SUMO protease	Suppression of recombination during replication 56
Slx5/Slx8	STUbL	Maintenance of replication fork stability 25, 53 Alternative lengthening of telomeres 59