Pathways & interactions
Rmd5, degenerated RING (dRING) finger (IPR037683)
Short name: Rmd5_dRing
Overlapping homologous superfamilies
- Zinc finger, RING/FYVE/PHD-type (IPR013083)
Rmd5 (also known as Gid2) is an E3 ubiquitin ligase containing a Lissencephaly type-1-like homology motif (LisH), a C-terminal to LisH motif (CTLH) domain, and a degenerated RING finger that is characterised by lacking the second, fifth, and sixth Zn2+ ion-coordinating residues compared with the classic C3H2C3-/C3HC4-type RING fingers [PMID: 18508925]. It forms the heterodimeric E3 ligase unit of the glucose induced degradation deficient (GID) complex with Gid9 (also known as Fyv10), which has a degenerated RING finger as well [PMID: 12686616].
The GID complex triggers polyubiquitylation and subsequent proteasomal degradation of the gluconeogenic enzymes fructose-1, 6-bisphosphatase (FBPase), phosphoenolpyruvate carboxykinase (PEPCK), and cytoplasmic malate dehydrogenase (c-MDH). Moreover, Rmd5p can form the GID complex with the other six Gid proteins, including Gid1/Vid30, Gid4/Vid24, Gid5/Vid28, Gid7, Gid8, and Gid9/Fyv10. The GID complex in which the seven Gid proteins reside functions as a novel ubiquitin ligase (E3) involved in the regulation of carbohydrate metabolism [PMID: 22645139].
Proteins containing this domain also includes C29A3.03c from fission yeasts.
- cd16652 (dRing_Rmd5p_like)