Component of the BAT3 complex, at least composed of BAG6/BAT3, UBL4A and GET3/TRC35. Interacts with AIFM1, CTCFL, HSPA2 and p300/EP300. Interacts with ricin A chain. Interacts with L.pneumophila proteins Lpg2160 and LegU1.
Function:
Chaperone that plays a key role in various processes such as apoptosis, insertion of tail-anchored (TA) membrane proteins to the endoplasmic reticulum membrane and regulation of chromatin. Acts in part by regulating stability of proteins and their degradation by the proteasome. Participates in endoplasmic reticulum stress-induced apoptosis via its interaction with AIFM1/AIF by regulating AIFM1/AIF stability and preventing its degradation. Also required during spermatogenesis for synaptonemal complex assembly via its interaction with HSPA2, by inhibiting polyubiquitination and subsequent proteasomal degradation of HSPA2. Required for selective ubiquitin-mediated degradation of defective nascent chain polypeptides by the proteasome. In this context, may play a role in immuno-proteasomes to generate antigenic peptides via targeted degradation, thereby playing a role in antigen presentation in immune response. Key component of the BAG6/BAT3 complex, a cytosolic multiprotein complex involved in the post-translational delivery of tail-anchored (TA) membrane proteins to the endoplasmic reticulum membrane. TA membrane proteins, also named type II transmembrane proteins, contain a single C-terminal transmembrane region. BAG6/BAT3 acts by facilitating TA membrane proteins capture by ASNA1/TRC40: it is recruited to ribosomes synthesizing membrane proteins, interacts with the transmembrane region of newly released TA proteins and transfers them to ASNA1/TRC40 for targeting to the endoplasmic reticulum membrane. Also involved in DNA damage-induced apoptosis: following DNA damage, accumulates in the nucleus and forms a complex with p300/EP300, enhancing p300/EP300-mediated p53/TP53 acetylation leading to increase p53/TP53 transcriptional activity. When nuclear, may also act as a component of some chromatin regulator complex that regulates histone 3 'Lys-4' dimethylation (H3K4me2).
Subcellular Location:
Cytoplasm
cytosol
Nucleus
The C-terminal fragment generated by caspase-3 is cytoplasmic.
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Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA / MRNA] (ISOFORM 1);VARIANT PRO-625
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Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 2)
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Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 4 AND 5);VARIANT PRO-625
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Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA];VARIANT PRO-625
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Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA];VARIANT PRO-625
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Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA];VARIANT PRO-625
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Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 2)
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Cited for: FUNCTION;SUBCELLULAR LOCATION;INTERACTION WITH RICIN A CHAIN;MUTAGENESIS OF ASP-1001;CLEAVAGE BY CASPASE-3
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Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-1117;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: FUNCTION;SUBCELLULAR LOCATION;INTERACTION WITH EP300
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Cited for: FUNCTION IN NK CELL ACTIVATION;INTERACTION WITH NCR3
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-113;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-973;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: FUNCTION IN NK CELL ACTIVATION;INTERACTION WITH NCR3
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-113; SER-973; SER-1081 AND SER-1117;PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-832 (ISOFORM 4);IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: ACETYLATION [LARGE SCALE ANALYSIS] AT MET-1;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-964 AND SER-973;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: UBIQUITINATION IN CASE OF INFECTION BY L.PNEUMOPHILA
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Cited for: FUNCTION;SUBCELLULAR LOCATION;RIBOSOME-BINDING;IDENTIFICATION BY MASS SPECTROMETRY;IDENTIFICATION IN THE BAG6/BAT3 COMPLEX
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-350; SER-964; SER-973 AND SER-1117;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-964 AND SER-973;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: FUNCTION;INTERACTION WITH RNF126
28.
"Solution structure of the N-terminal ubiquitin-like domain in the human BAT3 protein." RIKEN structural genomics initiative (RSGI)
Submitted (2005-07) to the PDB data bank
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Cited for: STRUCTURE BY NMR OF 17-89