ABC432 Sigma-Aldrich

Anti-LC3B Antibody

Synonym: Microtubule-associated proteins 1A/1B light chain 3B, Autophagy-related protein LC3 B, Autophagy-related ubiquitin-like modifier LC3 B, MAP1 light chain 3-like protein 2, MAP1A/MAP1B light chain 3 B, MAP1A/MAP1B LC3 B, Microtubule-associated protein 1 li

  •  eCl@ss 32160702

  •  NACRES NA.41



Related Categories Alphabetical Index, Antibodies, L-LL, Primary Antibodies
clone   polyclonal
biological source   rabbit
application(s)   western blot: suitable
species reactivity   human
shipped in   wet ice
antibody form   serum
antibody product type   primary antibodies
Quality Level   100
NCBI accession no.   NP_073729
UniProt accession no.   Q9GZQ8


General description

MAP1LC3B, also known as Autophagy-related protein LC3 B, LC3B, Autophagy-related ubiquitin-like modifier LC3 B, MAP1 light chain 3-like protein 2, MAP1A/MAP1B light chain 3 B, MAP1A/MAP1B LC3 B, Microtubule-associated protein 1 light chain 3 beta, and encoded by the gene MAP1LC3B/MAP1ALC3, is a ubiquitin-like modifier involved in formation of autophagosomal vacuoles (autophagosomes). MAP1LC3B plays a role in mitophagy which contributes to regulate mitochondrial quantity and quality by eliminating the mitochondria to a basal level to fulfill cellular energy requirements and preventing excess ROS production. Whereas LC3s are involved in elongation of the phagophore membrane, the GABARAP/GATE-16 subfamily is essential for a later stage in autophagosome maturation. MAP1LC3B interacts at microtubules with CABP1 (via EF-hands 1 and 2) but not with calmodulin. MAP1LC3B interacts with FYCO1 (via C-terminus). MAP1LC3B interacts with TP53INP1 and TP53INP2, and MAP1LC3B interacts with TBC1D25. MAP1LC3B directly interacts with SQSTM1; this interaction leads to MAP1LC3B recruitment to inclusion bodies containing polyubiquitinated protein aggregates and to inclusion body degradation by autophagy. MAP1LC3B interacts with ATG4B, MAPK15 and BNIP3 protein as well. MAP1LC3B is localized to the cytoplasm and cytoskeleton membranes, specifically endomembranes and cytoplasmic vesicles in the autophagosome. MAP1LC3B is expressed in most abundantly in heart, brain, skeletal muscle and testis tissues, with very low expression in liver tissues. Interestingly, high expression of MAP1LC3B in triple negative breast cancer (TNBC) is associated with poor outcomes in TNBC patients and is currently being studied as a prognostic evaluation marker for patients with TNBC.


Linear peptide corresponding to human LC3B.


Research Category
Apoptosis & Cancer

Research Sub Category
Apoptosis - Additional

Western Blotting Analysis: A representative lot from an independent laboratory detected LC3B in shRNA control HeLa cell lysates and demonstrated a loss of signal in TBC1D5 knockdown HeLa cell lysates. HeLa cells were either serum starved, or treated with bafilomycin A1 or serum starved in the presence of bafilomycin A1 (Popovic, D., et al. (2012). Mol Cell Biol. 32(9):1733-1744.).
Immunohistochemistry (Paraffin) Analysis: A 1:500 dilution from a representative lot detected LC3B in human cerebral cortex and rat cerebral cortex tissue sections.

Target description

~15 kDa observed

Physical form

Rabbit polyclonal serum with 0.05% sodium azide.


Storage and Stability

Stable for 1 year at -20°C from date of receipt.
Handling Recommendations: Upon receipt and prior to removing the cap, centrifuge the vial and gently mix the solution. Aliquot into microcentrifuge tubes and store at -20°C. Avoid repeated freeze/thaw cycles, which may damage IgG and affect product performance.


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.


Evaluated by Western Blotting in HeLa cell lysate.

Western Blotting Analysis: A 1:2,000 dilution of this antibody detected LC3B in 10 µg of HeLa cell lysate.

Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.


Certificate of Analysis (COA)

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Protocols & Articles


Antibody Basics

Immunoglobulins (Igs) are produced by B lymphocytes and secreted into plasma. The Ig molecule in monomeric form is a glycoprotein with a molecular weight of approximately 150 kDa that is shaped more ...
Keywords: Affinity chromatography, Centrifugation, Chromatography, Digestions, Direct immunofluorescence, Gene expression, High performance liquid chromatography, Immunofluorescence, Ion Exchange, Microscopy, Precipitation, Purification, Rheumatology, Scanning electron microscopy


Western Blot Protocol | Immunoblotting Protocol

Western Blotting refers to the electrophoretic transfer of proteins from sodium dodecyl sulfate polyacrylamide gels to sheets of PVDF or nitrocellullose membrane, followed by immunodetection of prote...
Keywords: AGE, Buffers, Cell disruption, Detection methods, Detergents, Dialysis, Electroblotting, Electrophoresis, Enzyme activity, Gel electrophoresis, Immunoprecipitation, PAGE, Protein extraction, Purification, Sample preparations, Western blot

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