Anti-Rab9 antibody - Late Endosome Marker

Supplementary info

This supplementary information is collated from multiple sources and compiled automatically.

Activity summary

Rab9 also known as Ras-related protein Rab-9A is a small GTPase and part of the Rab family with a mass of around 23 kDa. This protein mainly resides in the trans-Golgi network and late endosomes. Rab9 plays an important role in the transport of mannose 6-phosphate receptors between late endosomes and the Golgi apparatus facilitating cargo sorting and vesicular trafficking in cells.

Biological function summary

Rab9 coordinates several intracellular trafficking processes aiding in the regulation of membrane identity. It associates with other effectors such as tail-interacting protein (TIP47) to form complexes on the endosomal surface. These complexes help in vesicular transport ensuring efficient recycling of receptors. Rab9 impacts endosome maturation and transport making it an essential endosome marker.

Pathways

Rab9 influences and is involved in the regulation of the endocytic and secretory pathways. It interacts with proteins like Rab7 another GTPase to manage late endosome and lysosome transport. These interactions underline Rab9's functionalities in intracellular trafficking and recycling processes relying on cooperative interactions with other Rabs and their effectors.

Associated diseases and disorders

Rab9 plays a role in conditions like Niemann-Pick disease type C and some neurological disorders. Disruption in Rab9 function may affect lipid trafficking and lead to accumulation of cholesterol in late endosomes. This links Rab9 indirectly to proteins such as NPC1 which is known to be implicated in cholesterol homeostasis. Understanding Rab9's involvement can help inform therapeutic strategies targeting these pathways in related diseases.