NP_001265231.1
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NCBI GenBank Nucleotide #
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UniProt Primary Accession #
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UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
22,284 Da
NCBI Official Full Name
diablo homolog, mitochondrial isoform 4
NCBI Official Synonym Full Names
diablo, IAP-binding mitochondrial protein
NCBI Official Synonym Symbols
NCBI Protein Information
diablo homolog, mitochondrial; direct IAP-binding protein with low pI; second mitochondria-derived activator of caspase
UniProt Protein Name
Diablo homolog, mitochondrial
UniProt Synonym Protein Names
Direct IAP-binding protein with low pI; Second mitochondria-derived activator of caspase; Smac
UniProt Synonym Gene Names
UniProt Entry Name
DBLOH_HUMAN
NCBI Summary for SMAC/DIABLO
This gene encodes an inhibitor of apoptosis protein (IAP)-binding protein. The encoded mitochondrial protein enters the cytosol when cells undergo apoptosis, and allows activation of caspases by binding to inhibitor of apoptosis proteins. Overexpression of the encoded protein sensitizes tumor cells to apoptosis. A mutation in this gene is associated with young-adult onset of nonsyndromic deafness-64. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, May 2013]
UniProt Comments for SMAC/DIABLO
DIABLO: Promotes apoptosis by activating caspases in the cytochrome c/Apaf-1/caspase-9 pathway. Acts by opposing the inhibitory activity of inhibitor of apoptosis proteins (IAP). Inhibits the activity of BIRC6/bruce by inhibiting its binding to caspases. Isoform 3 attenuates the stability and apoptosis- inhibiting activity of XIAP/BIRC4 by promoting XIAP/BIRC4 ubiquitination and degradation through the ubiquitin-proteasome pathway. Isoform 3 also disrupts XIAP/BIRC4 interacting with processed caspase-9 and promotes caspase-3 activation. Isoform 1 is defective in the capacity to down-regulate the XIAP/BIRC4 abundance. Homodimer. Interacts with NGFRAP1/BEX3. Interacts with BIRC2/c-IAP1, BIRC3/c-IAP2, XIAP/BIRC4, BIRC6/bruce and BIRC7/livin. Interacts with the monomeric and dimeric form of BIRC5/survivin. Ubiquitously expressed with highest expression in testis. Expression is also high in heart, liver, kidney, spleen, prostate and ovary. Low in brain, lung, thymus and peripheral blood leukocytes. Isoform 3 is ubiquitously expressed. 3 isoforms of the human protein are produced by alternative splicing.
Protein type: Apoptosis; Mitochondrial
Chromosomal Location of Human Ortholog: 12q24.31
Cellular Component: internal side of plasma membrane; mitochondrion; mitochondrial intermembrane space; cytosol
Molecular Function: protein binding
Biological Process: caspase activation; neuron apoptosis; induction of apoptosis via death domain receptors; apoptosis; positive regulation of apoptosis; caspase activation via cytochrome c; induction of apoptosis by oxidative stress
Disease: Deafness, Autosomal Dominant 64
Research Articles on SMAC/DIABLO
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Products associated with SMAC/DIABLO recombinant protein
Pathways associated with SMAC/DIABLO recombinant protein
Diseases associated with SMAC/DIABLO recombinant protein
Organs/Tissues associated with SMAC/DIABLO recombinant protein
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