Purified anti-Neurofilament M (NF-M) Antibody (Previously Covance catalog# PCK-593P)

Pricing & Availability
Clone
Poly28227 (See other available formats)
Regulatory Status
RUO
Other Names
160 kD neurofilament protein, neurofilament triplet M protein, neurofilament-3 (150 kD medium), neurofilament, medium polypeptide 150kD
Previously
Covance Catalog# PCK-593P
Isotype
Chicken Polyclonal IgY
Ave. Rating
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Product Citations
publications
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822701 100 µL $313
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Description

Neurofilaments (NF) are ~10 nanometer intermediate filaments found in neurons. They are a major component of the neuronal cytoskeleton, and function primarily to provide structural support for the axon and regulate axon diameter. Neurofilaments belong to the same protein family as the intermediate filaments of other tissues such as keratins, which make the filaments expressed in epithelia. The family of proteins that includes the intermediate filaments is divided into 5 major classes, the keratins forming the classes I and II. Class III contains the proteins vimentin, desmin, peripherin and glial fibrillary acidic protein (GFAP). The major neurofilament subunits occupy the class IV family of intermediate filaments, along with two other filament proteins of neurons, alpha-internexin and nestin. The class IV intermediate filament genes share two unique introns not found in other intermediate filament gene sequences. Finally, class V corresponds to intermediate filaments of the nuclear cytoskeleton, the nuclear lamins. Neurofibrils are bundles of neurofilaments.

There are three major neurofilament subunits, and the names given to these subunits are based upon the apparent molecular mass of the mammalian subunits on SDS-PAGE: The light or lowest (NF-L) runs at 68-70 kD. The medium or middle (NF-M) runs at about 145-160 kD. The heavy or highest (NF-H) runs at 200-220 kD.

These three proteins are referred to as the "neurofilament triplet”. Antibodies against neurofilaments are useful for identification of neurons and their processes in histological sections and in tissue culture. The true molecular masses of these proteins are considerably lower than estimated based on SDS-PAGE mobility, particularly in the case of NF-H and NF-M. This is due to the highly charged C-terminal regions of the molecules. All three triplet proteins contain long stretches of polypeptide sequence rich in glutamic acid residues, and NF-M and especially NF-H also contain multiple tandemly repeated serine phosphorylation sites. These sites contain the peptide sequence lysine-serine-proline, and phosphorylation is predominantly found on axonal and not dendritic neurofilaments. Human NF-M has 13 of these KSP sites, while human NF-H is expressed from two alleles one of which produces 44 and the other 45 KSP repeats.

The fourth class IV subunit, alpha-internexin (NF66) was discovered much later than NF-L, NF-M and NF-H, and is found co-polymerized with these proteins in most mature neurons. The fifth protein belonging to class IV, Nestin, is found in developing neurons and glia, and the presence of this protein is widely used to define neurogenesis. This protein is lost as development proceeds.

The class III intermediate filament protein subunit peripherin is found in neurofilaments along with the class IV subunits in a few neurons, mostly in the peripheral nervous system. Finally another class III intermediate filament subunit, vimentin, is found in developing neurons and a few very unusual neurons in the adult in association with class IV proteins, such as the horizontal neurons of the retina.

In the adult mammal neurofilament subunit proteins coassemble , forming a heteropolymer that contain NF-L or alpha-internexin plus NF-M or NF-H. Peripherin and vimentin may incorporate into neurofilaments along with these proteins. The NF-H and NF-M proteins have lengthy C-terminal tail domains that appear to control the spacing between neighboring filaments, generating aligned arrays with a fairly uniform interfilament spacing as seen in axons.

During axonal growth, new neurofilament subunits are incorporated all along the axon in a dynamic process that involves the addition of subunits along the filament length, as well as the addition of subunits at filament ends. The level of neurofilament gene expression correlates with axonal diameter, which controls how fast electrical signals travel down the axon. Mutant mice with neurofilament abnormalities have phenotypes resembling amyotrophic lateral sclerosis. Neurofilament, NF, immunostaining is common in diagnostic neuropathology. It is useful for differentiating neurons (positive for NF) from glia (negative for NF).

Product Details
Technical data sheet

Product Details

Verified Reactivity
Human, Mouse, Rat
Reported Reactivity
Cat
Antibody Type
Polyclonal
Host Species
Chicken
Immunogen
This antibody was raised in chickens against purified bacterially expressed C-terminal extension of rat NF-M, the so-called KE segment.
Formulation
Phosphate-buffered solution + 10mM sodium azide.
Preparation
The antibody was purified by affinity chromatography.
Concentration
Lot-specific (to obtain lot-specific concentration and expiration, please enter the lot number in our Certificate of Analysis online tool.)
Storage & Handling
The antibody solution should be stored undiluted between 2°C and 8°C. Please note the storage condition for this antibody has been changed from -20°C to between 2°C and 8°C. You can also check your vial or your CoA to find the most accurate storage condition for this antibody.
Application

WB, ICC

Recommended Usage

Each lot of this antibody is quality control tested by Western blotting.

The optimal working dilution should be determined for each specific assay condition.
WB: 1:10,000*
ICC: 1:2,000
 

Application Notes

This antibody is effective in immunoblotting (WB) and immunocytochemistry (ICC). This antibody does not bind to protein A or protein G.

* Predicted MW = 145-160 kD

Application References

(PubMed link indicates BioLegend citation)
  1. Rusielewicz T, et. al. 2014. Glia 62:580. (ICC) PubMed
Product Citations
  1. Acheta J, et al. 2022. Glia. 70:2276. PubMed
  2. Pellegatta M, et al. 2022. J Neurosci. 42:2433. PubMed
  3. Rusielewicz T, et al. 2014. Glia. 62:580-591. PubMed
  4. Chuang YC, et al. 2023. Eur J Neurosci. 57:1225. PubMed
  5. Sophie B, et al. 2019. Front Mol Neurosci. 12:177. PubMed
  6. Florio F et al. 2018. The Journal of Neuroscience. 38(18):4275-4287 . PubMed
  7. Domingues HS, et al. 2020. J Cell Sci. . PubMed
  8. Catignas KK, et al. 2021. Glia. 69:91. PubMed
  9. Kugler C, et al. 2022. Brain Commun. 4:fcac170. PubMed
  10. Domingues HS, et al. 2020. J Cell Sci. 133:00:00. PubMed
  11. Reed CB, et al. 2020. J Neurosci. 40:6165. PubMed
  12. Bolino A, et al. 2016. EMBO Mol Med. 8(12):1438-1454.. PubMed
  13. Romano R, et al. 2021. Cell Mol Life Sci. 78:351. PubMed
  14. Shackleford G, et al. 2022. PLoS Genet. 18:e1010477. PubMed
RRID
AB_2564860 (BioLegend Cat. No. 822701)

Antigen Details

Cell Type
Mature Neurons
Biology Area
Cell Biology, Neuroscience, Neuroscience Cell Markers
Molecular Family
Intermediate Filaments
Gene ID
4741 View all products for this Gene ID
UniProt
View information about Neurofilament M NF-M on UniProt.org

Related FAQs

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Go To Top Version: 7    Revision Date: 08/12/2022

For Research Use Only. Not for diagnostic or therapeutic use.

 

This product is supplied subject to the terms and conditions, including the limited license, located at www.biolegend.com/terms) ("Terms") and may be used only as provided in the Terms. Without limiting the foregoing, BioLegend products may not be used for any Commercial Purpose as defined in the Terms, resold in any form, used in manufacturing, or reverse engineered, sequenced, or otherwise studied or used to learn its design or composition without express written approval of BioLegend. Regardless of the information given in this document, user is solely responsible for determining any license requirements necessary for user’s intended use and assumes all risk and liability arising from use of the product. BioLegend is not responsible for patent infringement or any other risks or liabilities whatsoever resulting from the use of its products.

 

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  • Purified anti-Neurofilament M (NF-M)

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