Fiche technique

Description biologique

Spécificité	IREB2/IRP2 + Aconitase 1/ACO1 Antibody [A13H1] reconnaît les niveaux endogènes de la protéine totale IREB2/IRP2 + Aconitase 1/ACO1.
Contexte	La protéine régulatrice du fer 2 (IRP2) et l'aconitase 1 (ACO1, également connue sous le nom d'IRP1) sont des protéines cytosoliques essentielles à l'homéostasie du fer et au métabolisme énergétique cellulaire. L'IRP2, encodée par le gène IREB2 sur le chromosome 15q25.1, détecte principalement les niveaux de fer cytosolique, se liant aux éléments de réponse au fer (IRE) sur les ARNm cibles pour réguler l'expression des gènes du métabolisme du fer tels que le récepteur 1 de la transferrine (TfR1) et la ferritine. Elle est largement exprimée dans les tissus métabolisant le fer et est régulée par une dégradation dépendante du fer. L'ACO1, encodée par le gène IREB1, est une enzyme bifonctionnelle qui agit comme une aconitase cytosolique dans le cycle de l'acide citrique dans des conditions de fer élevé et passe à une forme de type IRP dans des états de faible teneur en fer pour réguler les ARNm contenant des IRE. Structurellement, les deux protéines sont régulées par la présence d'un cluster [4Fe-4S], qui régit leur activité enzymatique ou de liaison à l'ARN. Leurs rôles dans l'équilibre du stockage, de l'absorption et de l'exportation du fer sont essentiels pour prévenir des troubles tels que la neurodégénérescence, l'anémie et les dommages liés au stress oxydatif, soulignant leur importance dans le maintien de l'homéostasie du fer et métabolique cellulaire.

Spécificité

IREB2/IRP2 + Aconitase 1/ACO1 Antibody [A13H1] reconnaît les niveaux endogènes de la protéine totale IREB2/IRP2 + Aconitase 1/ACO1.

Contexte

La protéine régulatrice du fer 2 (IRP2) et l'aconitase 1 (ACO1, également connue sous le nom d'IRP1) sont des protéines cytosoliques essentielles à l'homéostasie du fer et au métabolisme énergétique cellulaire. L'IRP2, encodée par le gène IREB2 sur le chromosome 15q25.1, détecte principalement les niveaux de fer cytosolique, se liant aux éléments de réponse au fer (IRE) sur les ARNm cibles pour réguler l'expression des gènes du métabolisme du fer tels que le récepteur 1 de la transferrine (TfR1) et la ferritine. Elle est largement exprimée dans les tissus métabolisant le fer et est régulée par une dégradation dépendante du fer. L'ACO1, encodée par le gène IREB1, est une enzyme bifonctionnelle qui agit comme une aconitase cytosolique dans le cycle de l'acide citrique dans des conditions de fer élevé et passe à une forme de type IRP dans des états de faible teneur en fer pour réguler les ARNm contenant des IRE. Structurellement, les deux protéines sont régulées par la présence d'un cluster [4Fe-4S], qui régit leur activité enzymatique ou de liaison à l'ARN. Leurs rôles dans l'équilibre du stockage, de l'absorption et de l'exportation du fer sont essentiels pour prévenir des troubles tels que la neurodégénérescence, l'anémie et les dommages liés au stress oxydatif, soulignant leur importance dans le maintien de l'homéostasie du fer et métabolique cellulaire.

Informations dutilisation

Application

WB, FCM

Dilution

WB	FCM
1:1000 -1: 2000	1:50

Réactivité

Human, Mouse, Rat

Source

Rabbit Monoclonal Antibody

MW

105 kDa

Tampon de stockage

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

Stockage
(À partir de la date de réception)

-20°C (avoid freeze-thaw cycles), 2 years

Méthodes expérimentales
WB	Experimental Protocol: Sample preparation 1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature or lyse it by sonication on ice, then incubate on ice for 30 minutes. 2. Adherent cell: Aspirate the culture medium and transfer the cells into an EP tube. Wash the cells with ice-cold PBS twice. Add an appropriate volume of RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes. 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.Add an appropriate volume of RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes. 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: 5%. 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 1271. 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.

Méthodes expérimentales

WB

Experimental Protocol:

Sample preparation

1. Tissue: Lyse the tissue sample by adding an appropriate volume of ice-cold RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail)，and homogenize the tissue at a low temperature or lyse it by sonication on ice, then incubate on ice for 30 minutes.

2. Adherent cell: Aspirate the culture medium and transfer the cells into an EP tube. Wash the cells with ice-cold PBS twice. Add an appropriate volume of RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes.

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.Add an appropriate volume of RIPA/Tris-HCL Lysis Buffer (containing Protease Inhibitor Cocktail), sonicate to lyse the cells, and incubate on ice for 30 minutes.

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: 5%. 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

1271. 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.

Références

https://www.intechopen.com/chapters/37587
https://pubmed.ncbi.nlm.nih.gov/36059676/

Données dapplication

WB

Validé par Selleck

Lane 1: Human fetal liver
Lane 2: Jurkat
Lane 3: Mouse kidney
Lane 4: Mouse heart
Lane 5: Rat heart