go_id,ontology,go_term,term_definition,evidence GO:0005096,MF,"GTPase activator activity","Binds to and increases the activity of a GTPase, an enzyme that catalyzes the hydrolysis of GTP.",IEA GO:0005622,CC,intracellular,"The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm.",IEA GO:0006886,BP,"intracellular protein transport","The directed movement of proteins in a cell, including the movement of proteins between specific compartments or structures within a cell, such as organelles of a eukaryotic cell.",IEA GO:0012505,CC,"endomembrane system","A collection of membranous structures involved in transport within the cell. The main components of the endomembrane system are endoplasmic reticulum, Golgi bodies, vesicles, cell membrane and nuclear envelope. Members of the endomembrane system pass materials through each other or though the use of vesicles.",IEA GO:0017137,MF,"Rab GTPase binding","Interacting selectively and non-covalently with Rab protein, any member of the Rab subfamily of the Ras superfamily of monomeric GTPases.",IDA GO:0031338,BP,"regulation of vesicle fusion","Any process that modulates the frequency, rate or extent of vesicle fusion.",IBA GO:0090630,BP,"activation of GTPase activity","Any process that initiates the activity of an inactive GTPase through the replacement of GDP by GTP.",IDA GO:1902018,BP,"negative regulation of cilium assembly","Any process that stops, prevents or reduces the frequency, rate or extent of cilium assembly.",IMP