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  Domain Name: Rab20
Rab GTPase family 20 (Rab20). Rab20 is one of several Rab proteins that appear to be restricted in expression to the apical domain of murine polarized epithelial cells. It is expressed on the apical side of polarized kidney tubule and intestinal epithelial cells, and in non-polarized cells. It also localizes to vesico-tubular structures below the apical brush border of renal proximal tubule cells and in the apical region of duodenal epithelial cells. Rab20 has also been shown to colocalize with vacuolar H+-ATPases (V-ATPases) in mouse kidney cells, suggesting a role in the regulation of V-ATPase traffic in specific portions of the nephron. It was also shown to be one of several proteins whose expression is upregulated in human myelodysplastic syndrome (MDS) patients. GTPase activating proteins (GAPs) interact with GTP-bound Rab and accelerate the hydrolysis of GTP to GDP. Guanine nucleotide exchange factors (GEFs) interact with GDP-bound Rabs to promote the formation of the GTP-bound state. Rabs are further regulated by guanine nucleotide dissociation inhibitors (GDIs), which facilitate Rab recycling by masking C-terminal lipid binding and promoting cytosolic localization. Most Rab GTPases contain a lipid modification site at the C-terminus, with sequence motifs CC, CXC, or CCX. Lipid binding is essential for membrane attachment, a key feature of most Rab proteins.
No pairwise interactions are available for this conserved domain.

Total Mutations Found: 57
Total Disease Mutations Found: 43
This domain occurred 85 times on human genes (148 proteins).



  BLADDER CANCER, SOMATIC, INCLUDED
  BLADDER CANCER, TRANSITIONAL CELL, SOMATIC
  BREAST ADENOCARCINOMA, SOMATIC
  CARDIOFACIOCUTANEOUS SYNDROME 2
  CONE-ROD DYSTROPHY 18
  EPIDERMAL NEVUS, SOMATIC, INCLUDED;;
  GASTRIC CANCER, SOMATIC
  GASTRIC CANCER, SOMATIC, INCLUDED;;
  GRISCELLI SYNDROME, TYPE 2
  LUNG CANCER, SOMATIC
  LUNG CANCER, SQUAMOUS CELL, SOMATIC
  MENTAL RETARDATION, X-LINKED, SYNDROMIC, MARTIN-PROBST TYPE
  NEUTROPHIL IMMUNODEFICIENCY SYNDROME
  NEVUS SEBACEOU
  NEVUS SEBACEOUS, SOMATIC, INCLUDED
  NOONAN SYNDROME 3
  NOONAN SYNDROME 8
  OVARIAN CANCER, SOMATIC
  PANCREATIC CARCINOMA, SOMATIC
  PILOCYTIC ASTROCYTOMA, SOMATIC
  WARBURG MICRO SYNDROME 3


Tips:
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 Functional Features are displayed as orange boxes under the histograms. You can choose which features are displayed in the box below.



Range on the Protein:  

   Protein ID            Protein Position

Domain Position:  


Feature Name:Total Found:
GTP/Mg2+ binding site
putative GEF interaction
putative GDI interaction
putative effector interac
putative lipid modificati
Switch I region
Switch II region
G1 box
G2 box
G3 box
G4 box
G5 box
Rab family motif 1 (RabF1
Rab family motif 2 (RabF2
Rab family motif 3 (RabF3
Rab family motif 4 (RabF4
Rab family motif 5 (RabF5
Rab subfamily motif 1 (Ra
Rab subfamily motif 2 (Ra
Rab subfamily motif 3 (Ra
Rab subfamily motif 4 (Ra














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Please Cite: Peterson, T.A., Adadey, A., Santana-Cruz ,I., Sun, Y., Winder A, Kann, M.G., (2010) DMDM: Domain Mapping of Disease Mutations. Bioinformatics 26 (19), 2458-2459.

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