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Anti-p75NTR Rabbit Antibody [K22C18]

Catalog No.: F0563

Application: Reactivity: Human, Mouse, Rat

Usage Information

Dilution
WB1:1000 IP1:50 IF1:1600 - 1:3200 FCM1:200 - 1:800

Application
WB, IP, IF, FCM

Reactivity
Human, Mouse, Rat

Source
Rabbit

Storage Buffer
PBS, pH 7.2+50% Glycerol+0.05% BSA+0.01% NaN3

Storage (from the date of receipt)
-20°C (avoid freeze-thaw cycles), 2 years

Predicted MW
75 kDa

Positive Control	Mouse optic tract; Mouse E12 spinal cord and somites; PC-3 (ibuprofen, 2 mM, 24 h); SW480; SK-N-MC
Negative Control	PC-3 ; DLD-1

Exprimental Methods

WB
Experimental Protocol: Sample preparation 1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature. 2. Adherent cell: Aspirate the culture medium and wash the cells with ice-cold PBS twice. Lyse the cells by adding an appropriate volume of RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail) and put the sample on ice for 5 min. 3. Suspension cell: Transfer the culture medium to a pre-cooled centrifuge tube. Centrifuge and aspirate the supernatant. Wash the cells with ice-cold PBS twice. Lyse the cells by adding an appropriate volume of RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail) and put the sample on ice for 5 min. 4. Place the lysate into a pre-cooled microcentrifuge tube. Centrifuge at 4°C for 15 min. Collect the supernatant; 5. Remove a small volume of lysate to determine the protein concentration; 6. Combine the lysate with protein loading buffer. Boil 20 µL sample under 95-100°C for 5 min. Centrifuge for 5 min after cool down on ice. Electrophoretic separation 1. According to the concentration of extracted protein, load appropriate amount of protein sample and marker onto SDS-PAGE gels for electrophoresis. Recommended separating gel (lower gel) concentration: 10%. Reference Table for Selecting SDS-PAGE Separation Gel Concentrations 2. Power up 80V for 30 minutes. Then the power supply is adjusted (110 V~150 V), the Marker is observed, and the electrophoresis can be stopped when the indicator band of the predyed protein Marker where the protein is located is properly separated. (Note that the current should not be too large when electrophoresis, too large current (more than 150 mA) will cause the temperature to rise, affecting the result of running glue. If high currents cannot be avoided, an ice bath can be used to cool the bath.) Transfer membrane 1. Take out the converter, soak the clip and consumables in the pre-cooled converter; 2. Activate PVDF membrane with methanol for 1 min and rinse with transfer buffer; 3. Install it in the order of "black edge of clip - sponge - filter paper - filter paper - glue -PVDF membrane - filter paper - filter paper - sponge - white edge of clip"; 4. The protein was electrotransferred to PVDF membrane. ( 0.45 µm PVDF membrane is recommended ) Reference Table for Selecting PVDF Membrane Pore Size Specifications Recommended conditions for wet transfer: 200 mA, 120 min. ( Note that the transfer conditions can be adjusted according to the protein size. For high-molecular-weight proteins, a higher current and longer transfer time are recommended. However, ensure that the transfer tank remains at a low temperature to prevent gel melting.) Block 1. After electrotransfer, wash the film with TBST at room temperature for 5 minutes; 2. Incubate the film in the blocking solution for 1 hour at room temperature; 3. Wash the film with TBST for 3 times, 5 minutes each time. Antibody incubation 1. Use 5% skim milk powder to prepare the primary antibody working liquid (recommended dilution ratio for primary antibody 1:1000), gently shake and incubate with the film at 4°C overnight; 2. Wash the film with TBST 3 times, 5 minutes each time; 3. Add the secondary antibody to the blocking solution and incubate with the film gently at room temperature for 1 hour; 4. After incubation, wash the film with TBST 3 times for 5 minutes each time. Antibody staining 1. Add the prepared ECL luminescent substrate (or select other color developing substrate according to the second antibody) and mix evenly; 2. Incubate with the film for 1 minute, remove excess substrate (keep the film moist), wrap with plastic film, and expose in the imaging system.

Experimental Protocol:

Sample preparation

1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature.

2. Adherent cell: Aspirate the culture medium and wash the cells with ice-cold PBS twice. Lyse the cells by adding an appropriate volume of RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail) and put the sample on ice for 5 min.

3. Suspension cell: Transfer the culture medium to a pre-cooled centrifuge tube. Centrifuge and aspirate the supernatant. Wash the cells with ice-cold PBS twice. Lyse the cells by adding an appropriate volume of RIPA/NP-40 Lysis Buffer (containing Protease Inhibitor Cocktail) and put the sample on ice for 5 min.

4. Place the lysate into a pre-cooled microcentrifuge tube. Centrifuge at 4°C for 15 min. Collect the supernatant;

5. Remove a small volume of lysate to determine the protein concentration;

6. Combine the lysate with protein loading buffer. Boil 20 µL sample under 95-100°C for 5 min. Centrifuge for 5 min after cool down on ice.

Electrophoretic separation

1. According to the concentration of extracted protein, load appropriate amount of protein sample and marker onto SDS-PAGE gels for electrophoresis. Recommended separating gel (lower gel) concentration: 10%. Reference Table for Selecting SDS-PAGE Separation Gel Concentrations

2. Power up 80V for 30 minutes. Then the power supply is adjusted (110 V~150 V), the Marker is observed, and the electrophoresis can be stopped when the indicator band of the predyed protein Marker where the protein is located is properly separated. (Note that the current should not be too large when electrophoresis, too large current (more than 150 mA) will cause the temperature to rise, affecting the result of running glue. If high currents cannot be avoided, an ice bath can be used to cool the bath.)

Transfer membrane

1. Take out the converter, soak the clip and consumables in the pre-cooled converter;

2. Activate PVDF membrane with methanol for 1 min and rinse with transfer buffer;

3. Install it in the order of "black edge of clip - sponge - filter paper - filter paper - glue -PVDF membrane - filter paper - filter paper - sponge - white edge of clip";

4. The protein was electrotransferred to PVDF membrane. ( 0.45 µm PVDF membrane is recommended ) Reference Table for Selecting PVDF Membrane Pore Size Specifications

Recommended conditions for wet transfer: 200 mA, 120 min.

( Note that the transfer conditions can be adjusted according to the protein size. For high-molecular-weight proteins, a higher current and longer transfer time are recommended. However, ensure that the transfer tank remains at a low temperature to prevent gel melting.)

Block

1. After electrotransfer, wash the film with TBST at room temperature for 5 minutes;

2. Incubate the film in the blocking solution for 1 hour at room temperature;

3. Wash the film with TBST for 3 times, 5 minutes each time.

Antibody incubation

1. Use 5% skim milk powder to prepare the primary antibody working liquid (recommended dilution ratio for primary antibody 1:1000), gently shake and incubate with the film at 4°C overnight;

2. Wash the film with TBST 3 times, 5 minutes each time;

3. Add the secondary antibody to the blocking solution and incubate with the film gently at room temperature for 1 hour;

4. After incubation, wash the film with TBST 3 times for 5 minutes each time.

Antibody staining

1. Add the prepared ECL luminescent substrate (or select other color developing substrate according to the second antibody) and mix evenly;

2. Incubate with the film for 1 minute, remove excess substrate (keep the film moist), wrap with plastic film, and expose in the imaging system.

IF
Experimental Protocol： Specimen Preparation 1. Aspirate liquid, then cover cells to a depth of 2–3 mm with 4% Paraformaldehyde diluted in 1X PBS. NOTE: Paraformaldehyde is toxic, use only in a fume hood. 2. Fix cells for 15 min at room temperature. 3. Aspirate fixative, rinse three times in 1X PBS for 5 min each. 4. Proceed with Immunostaining. Immunostaining 1. Add theblocking buffer and incubate for 60 min at RT. 2. Prepare primary antibody diluent in antibody dilution buffer as recommended . 3. Aspirate blocking solution, apply diluted primary antibody. 4. Incubate overnight at 4°C. 5. Rinse three times in 1X PBS for 5 min each. 6. Incubate specimens in fluorochrome-conjugated secondary antibody diluted in antibody dilution buffer for 1–2 hr at room temperature in the dark. 7. Rinse three times in 1X PBS for 5 min each. 8. Mount slides usingmounting medium with DAPI and cover with coverslips. 9. For best results, allow mountant to cure overnight at room temperature. For long-term storage, store slides flat at 23°C protected from light.

Experimental Protocol：

Specimen Preparation

1. Aspirate liquid, then cover cells to a depth of 2–3 mm with 4% Paraformaldehyde diluted in 1X PBS.

NOTE: Paraformaldehyde is toxic, use only in a fume hood.

2. Fix cells for 15 min at room temperature.

3. Aspirate fixative, rinse three times in 1X PBS for 5 min each.

4. Proceed with Immunostaining.

Immunostaining

1. Add theblocking buffer and incubate for 60 min at RT.

2. Prepare primary antibody diluent in antibody dilution buffer as recommended .

3. Aspirate blocking solution, apply diluted primary antibody.

4. Incubate overnight at 4°C.

5. Rinse three times in 1X PBS for 5 min each.

6. Incubate specimens in fluorochrome-conjugated secondary antibody diluted in antibody dilution buffer for 1–2 hr at room temperature in the dark.

7. Rinse three times in 1X PBS for 5 min each.

8. Mount slides usingmounting medium with DAPI and cover with coverslips.

9. For best results, allow mountant to cure overnight at room temperature. For long-term storage, store slides flat at 23°C protected from light.

Datasheet & SDS

Biological Description

Specificity
p75NTR Rabbit mAb detects endogenous levels of total p75NTR protein.

Subcellular Location
Cell membrane, Cell projection, Cytoplasm, Membrane, Synapse

Uniprot ID
P08138

Clone
K22C18

Synonym(s)
Tumor necrosis factor receptor superfamily member 16, Gp80-LNGFR, Low affinity neurotrophin receptor p75NTR, Low-affinity nerve growth factor receptor (NGF receptor), Low-affinity nerve growth factor receptor p75NGFR, Low-affinity nerve growth factor receptor p75NGR, p75 ICD, CD271, NGFR, TNFRSF16

Background
The p75NTR (p75 neurotrophin receptor, also known as TNFRSF16) is an unconventional member of the tumor necrosis factor receptor superfamily, originally defined as a neurotrophin receptor that binds soluble, dimeric neurotrophins such as NGF, BDNF, NT-3, and NT-4, as well as their proneurotrophin precursors. Structurally, it consists of an extracellular region with four cysteine-rich domains (CRDs) stabilized by disulfide bonds, a single 21–amino acid transmembrane segment, and an intracellular portion containing a juxtamembrane region, a Chopper domain important for apoptosis, and a C-terminal death domain that, unlike canonical TNFR death domains, does not self-associate. p75NTR is highly conserved among vertebrates and can form monomers, dimers, or trimers, as well as heteromeric complexes with Trk receptors or sortilin family members, enabling diverse ligand recognition and signaling outcomes. Functionally, it regulates neuronal survival, apoptosis, axonal growth, synaptic plasticity, and cytoskeletal remodeling via pathways involving TRAF6, RIP2, NFκB, JNK, Rac, and Rho. Normally expressed during development in the peripheral and central nervous systems and restricted in adults to regions such as the subiculum, basal forebrain, and cerebellum, its expression is markedly upregulated after injury, inflammation, aging, or in neurodegenerative disease. Beyond neurotrophins, p75NTR also binds amyloid-β, ephrin A, Nogo receptor complexes, rabies virus glycoprotein, and, recently, the immune co-stimulatory protein B7-1, linking it to neuroimmune-mediated synapse elimination.

Background

The p75NTR (p75 neurotrophin receptor, also known as TNFRSF16) is an unconventional member of the tumor necrosis factor receptor superfamily, originally defined as a neurotrophin receptor that binds soluble, dimeric neurotrophins such as NGF, BDNF, NT-3, and NT-4, as well as their proneurotrophin precursors. Structurally, it consists of an extracellular region with four cysteine-rich domains (CRDs) stabilized by disulfide bonds, a single 21–amino acid transmembrane segment, and an intracellular portion containing a juxtamembrane region, a Chopper domain important for apoptosis, and a C-terminal death domain that, unlike canonical TNFR death domains, does not self-associate. p75NTR is highly conserved among vertebrates and can form monomers, dimers, or trimers, as well as heteromeric complexes with Trk receptors or sortilin family members, enabling diverse ligand recognition and signaling outcomes. Functionally, it regulates neuronal survival, apoptosis, axonal growth, synaptic plasticity, and cytoskeletal remodeling via pathways involving TRAF6, RIP2, NFκB, JNK, Rac, and Rho. Normally expressed during development in the peripheral and central nervous systems and restricted in adults to regions such as the subiculum, basal forebrain, and cerebellum, its expression is markedly upregulated after injury, inflammation, aging, or in neurodegenerative disease. Beyond neurotrophins, p75NTR also binds amyloid-β, ephrin A, Nogo receptor complexes, rabies virus glycoprotein, and, recently, the immune co-stimulatory protein B7-1, linking it to neuroimmune-mediated synapse elimination.

References
https://pubmed.ncbi.nlm.nih.gov/38106879/

Reference Table for Selecting PVDF Membrane Pore Size Specifications

Protein Size (kDa)	PVDF Transfer Membrane Pore Size (μm)
< 10	0.22
10-20	0.22
20-30	0.45
30-45	0.45
45-70	0.45
80-100	0.45
100-140	0.45
> 140	0.45

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

Tel: +1-832-582-8158 Ext:3
If you have any other enquiries, please leave a message.

* Indicates a Required Field

Protein Size (kDa)	Separating Gel Percentage
4-40	20%
12-45	15%
10-70	12.5%
15-100	10%
25-100	8%
60-210	5%