PRO_ID Object_term Object_syny Modifier Relation Ontology_ID Ontology_term Relative_to Interaction_with Evidence_source Evidence_code Taxon Inferred_from DB_ID Date Assigned_by Comment PR:000000127 smad ubiquitination regulatory factor smurf acts_upstream_of_or_within GO:0009968 negative regulation of signal transduction PIRSF:PIRSF500454 ISS PIRSF:PIRSF500454 PIRSF:PIRSF500454 20080301 PRO:CNA PR:000000127 smad ubiquitination regulatory factor smurf acts_upstream_of_or_within GO:0007398 ectoderm development PIRSF:PIRSF500454 ISS PIRSF:PIRSF500454 PIRSF:PIRSF500454 20080301 PRO:CNA PR:000000127 smad ubiquitination regulatory factor smurf acts_upstream_of_or_within GO:0006511 ubiquitin-dependent protein catabolic process PIRSF:PIRSF500454 ISS PIRSF:PIRSF500454 PIRSF:PIRSF500454 20080301 PRO:CNA