Recombinant Human Mitochondrial ubiquitin ligase activator of NFKB 1 (MUL1), Truncated

Uniprot Id

Q969V5

Target Species

Human

Target Name

MUL1

Target Full Name

Mitochondrial ubiquitin ligase activator of NFKB 1

Target Function

Exhibits weak E3 ubiquitin-protein ligase activity. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfer the ubiquitin to targeted substrates. Can ubiquitinate AKT1 preferentially at 'Lys-284' involving 'Lys-48'-linked polyubiquitination and seems to be involved in regulation of Akt signaling by targeting phosphorylated Akt to proteosomal degradation. Mediates polyubiquitination of cytoplasmic TP53 at 'Lys-24' which targets TP53 for proteasomal degradation, thus reducing TP53 levels in the cytoplasm and mitochondrion. Proposed to preferentially act as a SUMO E3 ligase at physiological concentrations. Plays a role in the control of mitochondrial morphology by promoting mitochondrial fragmentation, and influences mitochondrial localization. Likely to promote mitochondrial fission through negatively regulating the mitochondrial fusion proteins MFN1 and MFN2, acting in a pathway that is parallel to the PRKN/PINK1 regulatory pathway. May also be involved in the sumoylation of the membrane fission protein DNM1L. Inhibits cell growth. When overexpressed, activates JNK through MAP3K7/TAK1 and induces caspase-dependent apoptosis. Involved in the modulation of innate immune defense against viruses by inhibiting DDX58-dependent antiviral response. Can mediate DDX58 sumoylation and disrupt its polyubiquitination.

Target Subcellular Location

Mitochondrion outer membrane; Multi-pass membrane protein. Peroxisome.

Target Tissue Specificity

Widely expressed with highest levels in the heart, skeletal muscle, placenta, kidney and liver. Barely detectable in colon and thymus.

Target Synonyms

0610009K11Rik; AV000801; C1orf166; Chromosome 1 open reading frame 166; E3 SUMO-protein ligase MUL1; E3 ubiquitin ligase; E3 ubiquitin protein ligase MUL1; E3 ubiquitin-protein ligase MUL1; FLJ12875; GIDE; Growth inhibition and death E3 ligase; MAPL; Mitochondrial anchored protein ligase; mitochondrial E3 ubiquitin ligase 1; mitochondrial E3 ubiquitin protein ligase 1; Mitochondrial ubiquitin ligase activator of NFKB 1; Mitochondrial-anchored protein ligase; MUL1; MUL1_HUMAN; MULAN; Putative NF kappa B activating protein 266; Putative NF-kappa-B-activating protein 266; RGD1309944; RING finger protein 218; RNF218; RP11-401M16.2; RP23-25C1.10-002

Target Background

Enables several functions, including p53 binding activity; ubiquitin protein ligase binding activity; and ubiquitin-like protein transferase activity. Involved in several processes, including negative regulation of defense response; positive regulation of cellular protein metabolic process; and regulation of mitochondrion organization. Located in several cellular components, including mitochondrion; neuronal cell body; and peroxisome. Is integral component of mitochondrial outer membrane.