Assessed in larval eye discs, loss-of-function mutations of Dmel\Rab5 in clones of cells overexpressing a growth regulator microRNA, mir-ban (bantam), result in dramatic tumor growth and malignant invasion of adjacent tissues, specifically the ventral nerve cord. Neither overexpression of mir-ban alone nor Rab5 mutation alone causes tumor growth or metastatic behavior. This system has been used to assess transcriptome changes over the course of tumor growth and progression.
There are three human genes orthologous to Dmel\Rab5, RAB5A, RAB5B, and RAB5C. UAS constructs of tagged Hsap\RAB5C and Hsap\RAB5A human genes have been introduced into flies, but have not been characterized in the context of this disease model.
[updated Sep. 2023 by FlyBase; FBrf0222196]
The Rab family of proteins is a member of the Ras superfamily of monomeric G proteins. Rab GTPases regulate many steps of membrane traffic, including vesicle formation, vesicle movement along actin and tubulin networks, and membrane fusion. [https://www.genenames.org/cgi-bin/genefamilies/set/388]
Many to one: 3 human to 1 Drosophila. The human genes are RAB5A, RAB5B, and RAB5C.
Many to one: 3 human to 1 Drosophila. The human genes are RAB5A, RAB5B, and RAB5C.
Many to one: 3 human to 1 Drosophila. The human genes are RAB5A, RAB5B, and RAB5C.
5' seed sequence homologous to that of human MIR450B-3p (FBrf0242402).
Moderate- to high-scoring ortholog of human RAB5A, RAB5B, and RAB5C (1 Drosophila to 3 human).