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- Table of Contents
Facts about TBC1 domain family member 4.
May act as a GTPase-activating protein for RAB2A, RAB8A, RAB10 and RAB14.
Isoform 2 promotes insulin-induced sugar transporter SLC2A4/GLUT4 translocation at the plasma membrane, thus increasing glucose uptake..
Human | |
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Gene Name: | TBC1D4 |
Uniprot: | O60343 |
Entrez: | 9882 |
Belongs to: |
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No superfamily |
Akt substrate of 160 kDa; AS160Acrg embryonic lethality minimal region ortholog; DKFZp779C0666; KIAA0603TBC (Tre-2, BUB2, CDC16) domain-containing protein; TBC1 domain family member 4; TBC1 domain family, member 4
Mass (kDA):
146.563 kDA
Human | |
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Location: | 13q22.2 |
Sequence: | 13; NC_000013.11 (75283503..75483144, complement) |
Widely expressed. Isoform 2 is the highest overexpressed in most tissues. Isoform 1 is highly expressed in skeletal muscle and heart, but was not detectable in the liver nor in adipose tissue. Isoform 2 is strongly expressed in adrenal and thyroid gland, and also in lung, kidney, colon, brain and adipose tissue. Isoform 2 is moderately expressed in skeletal muscle. Expressed in pancreatic Langerhans islets, including beta cells (at protein level). Expression is decreased by twofold in pancreatic islets in type 2 diabetes patients compared to control subjects. Up-regulated in T-cells from patients with atopic dermatitis.
Cytoplasm. Isoform 2 shows a cytoplasmic perinuclear localization in a myoblastic cell line in resting and insulin-stimulated cells.
PMID: 18771725 by Baus D., et al. Identification of a novel AS160 splice variant that regulates GLUT4 translocation and glucose-uptake in rat muscle cells.
PMID: 19077034 by Ishibashi K., et al. Identification and characterization of a novel Tre-2/Bub2/Cdc16 (TBC) protein that possesses Rab3A-GAP activity.