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Anti-MBNL1 Antibody, clone 4A8 is a Mouse Monoclonal Antibody for detection of MBNL1 also known as muscleblind-like protein 1, Triplet-expansion RNA-binding protein & has been validated in WB, ICC.
More>>Anti-MBNL1 Antibody, clone 4A8 is a Mouse Monoclonal Antibody for detection of MBNL1 also known as muscleblind-like protein 1, Triplet-expansion RNA-binding protein & has been validated in WB, ICC. Less<<
Anti-MBNL1 Antibody, clone 4A8: SDB (Sicherheitsdatenblätter), Analysenzertifikate und Qualitätszertifikate, Dossiers, Broschüren und andere verfügbare Dokumente.
Muscleblind 1 (MBNL1) is a member of the muscleblind family. MBNL1 is involved in pre-mRNA alternative splicing and acts as either splicing activator or repressor on specific pre-mRNA targets. This protein contains four C3H1-type zinc fingers and binds to expanded CUG repeat RNA. High expression of MBNL1 has been observed in cardiac and skeletal muscle as well as in differentiating myoblasts. MBNL1 is known to be involved in the pathogenesis of dystrophia myotonica type 1 (DM1). For those afflicted with this muscular disorder, MBNL1 is sequestered by DMPK RNAs that contain CUG triplet repeat expansions.
References
Product Information
Format
Purified
Control
HEK293 cell lysate
Presentation
Purified mouse monoclonal IgG1κ in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.
Anti-MBNL1 Antibody, clone 4A8 is a Mouse Monoclonal Antibody for detection of MBNL1 also known as muscleblind-like protein 1, Triplet-expansion RNA-binding protein & has been validated in WB, ICC.
Key Applications
Western Blotting
Immunocytochemistry
Application Notes
Immunocytochemistry Analysis: 1:4 dilution from a representative lot detected MBNL1 in myotonic dystrophy cells. Data courtesy of Dr. Ian Holt, Wolfson Centre for Inherited Neuromuscular Disease.
Biological Information
Immunogen
Full length recombinant protein corresponding to human MBNL1.
Function: Mediates pre-mRNA alternative splicing regulation. Acts either as activator or repressor of splicing on specific pre-mRNA targets. Inhibits cardiac troponin-T (TNNT2) pre-mRNA exon inclusion but induces insulin receptor (IR) pre-mRNA exon inclusion in muscle. Antagonizes the alternative splicing activity pattern of CELF proteins. Regulates the TNNT2 exon 5 skipping through competition with U2AF2. Inhibits the formation of the spliceosome A complex on intron 4 of TNNT2 pre-mRNA. Binds to the stem-loop structure within the polypyrimidine tract of TNNT2 intron 4 during spliceosome assembly. Binds to the 5'-YGCU(U/G)Y-3'consensus sequence. Binds to the IR RNA. Binds to expanded CUG repeat RNA, which folds into a hairpin structure containing GC base pairs and bulged, unpaired U residues. Ref.3 Ref.5 Ref.6 Ref.7 Ref.8
Subunit structure: Interacts with DDX1 and YBX1. Interacts with HNRNPH1; the interaction in RNA-independent. Ref.6 Ref.7
Subcellular location: Nucleus. Cytoplasm. Cytoplasmic granule. Note: Localized with DDX1, TIAL1 and YBX1 in stress granules upon stress. Localized in the cytoplasm of multinucleated myotubes. Colocalizes with nuclear foci of retained expanded-repeat transcripts in myotubes from patients affected by myotonic dystrophy. Ref.3 Ref.7 Ref.4
Tissue specificity: Highly expressed in cardiac, skeletal muscle and during myoblast differentiation. Weakly expressed in other tissues (at protein level). Expressed in heart, brain, placenta, lung, liver, skeletal muscle, kidney and pancreas. Ref.3 Ref.4
Involvement in disease: Plays a role in the pathogenesis of dystrophia myotonica type 1 (DM1) [MIM:160900]. A muscular disorder characterized by myotonia, muscle wasting in the distal extremities, cataract, hypogonadism, defective endocrine functions, male baldness and cardiac arrhythmias. Note=In muscle cells from DM1 patients, MBNL1 is sequestered by DMPK RNAs containing CUG triplet repeat expansions. MBNL1 binding is proportional to repeat length consistent with the direct correlation between the length of repeat expansion and disease severity.
Sequence similarities: Belongs to the muscleblind family.
Contains 4 C3H1-type zinc fingers.
Molecular Weight
~39 kDa observed
Physicochemical Information
Dimensions
Materials Information
Toxicological Information
Safety Information according to GHS
Safety Information
Product Usage Statements
Quality Assurance
Evaluated by Western Blot in HEK293 cell lysate.
Western Blot Analysis: 1:10,000 dilution of this antibody detected MBNL1 on 10 µg of HEK293 cell lysate.
Usage Statement
Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
The muscleblind-like (Mbnl) family of RNA-binding proteins plays important roles in muscle and eye development and in myotonic dystrophy (DM), in which expanded CUG or CCUG repeats functionally deplete Mbnl proteins. We identified transcriptome-wide functional and biophysical targets of Mbnl proteins in brain, heart, muscle, and myoblasts by using RNA-seq and CLIP-seq approaches. This analysis identified several hundred splicing events whose regulation depended on Mbnl function in a pattern indicating functional interchangeability between Mbnl1 and Mbnl2. A nucleotide resolution RNA map associated repression or activation of exon splicing with Mbnl binding near either 3' splice site or near the downstream 5' splice site, respectively. Transcriptomic analysis of subcellular compartments uncovered a global role for Mbnls in regulating localization of mRNAs in both mouse and Drosophila cells, and Mbnl-dependent translation and protein secretion were observed for a subset of mRNAs with Mbnl-dependent localization. These findings hold several new implications for DM pathogenesis.
Nuclear speckles are storage sites for small nuclear RNPs (snRNPs) and other splicing factors. Current ideas about the role of speckles suggest that some pre-mRNAs are processed at the speckle periphery before being exported as mRNA. In myotonic dystrophy type 1 (DM1), the export of mutant DMPK mRNA is prevented by the presence of expanded CUG repeats that accumulate in nuclear foci. We now show that these foci accumulate at the periphery of nuclear speckles. In myotonic dystrophy type 2 (DM2), mRNA from the mutant ZNF9 gene is exported normally because the expanded CCUG repeats are removed during splicing. We now show that the nuclear foci formed by DM2 intronic repeats are widely dispersed in the nucleoplasm and not associated with either nuclear speckles or exosomes. We hypothesize that the expanded CUG repeats in DMPK mRNA are blocking a stage in its export pathway that would normally occur at the speckle periphery. Localization of the expanded repeats at the speckle periphery is not essential for their pathogenic effects because DM1 and DM2 are quite similar clinically.
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