Stat4 (J22G17) Rabbit mAb

Catalog No.: F0661

Lane 1: KARPAS-299
Lane 2: MOLT-4
Lane 3: BW5147
Lane 4: Rat thymus

サイズ（液体）	価格(税別)	在庫状況
20uL	JPY 19800	国内在庫なし(納期7~10日)
100uL	JPY 49500	国内在庫なし(納期7~10日)
100uL*2	JPY 74200	お問い合わせ

代表番号: 045-509-1970\|電子メール：sales@selleck.co.jp よく尋ねられる質問

キーポイント

タンパク質の局在：細胞接着, 細胞質, 細胞骨格, 细胞核。
WB
RIPA/NP-40 Lysis Buffer バッファーでのライセート調製を推奨します。

使用情報

Dilution
WB1:1000 IP1:50 CHIP1:50

Application
WB, IP, ChIP

Source
Rabbit

Reactivity
Human, Mouse, Rat

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 Observed MW
81 kDa 81 kDa
^*なぜ予測分子量と実際の分子量が異なるのか？下記の原因により、実際の分子量が予測と異なる：タンパク質の翻訳後修飾（リン酸化/糖鎖付加），スプライシングバリアント，イソフォーム，相対的な電荷，ポリマー。

ポジティブコントロール	Rat thymus; KARPAS-299; T2; MOLT-4; BW5147; ACHN; SR; Caki; NK-92
ネガティブコントロール

プロトコール

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.

Datasheet & SDS

生物学的記述

Specificity
Stat4 (J22G17) Rabbit mAb detects endogenous levels of total Stat4 protein.

Uniprot ID
Q14765

Clone
J22G17

Background
Signal transducer and activator of transcription 4 (STAT4) is a member of the STAT family, primarily expressed in T cells, NK cells, and to a lesser extent, monocytes, macrophages, and dendritic cells upon activation. STAT4 plays a crucial role in cell-mediated immunity, particularly in response to IL-12 stimulation, by promoting Th1 differentiation and IFN-γ production. Structurally, STAT4 contains six domains: an N-terminal domain for dimerization and nuclear translocation, a coiled-coil domain for regulatory factor binding, a DNA-binding domain for enhancer interaction, a linker domain for DNA binding facilitation, an SH2 domain for receptor binding post-phosphorylation, and a C-terminal transactivation domain for gene activation. Activated through phosphorylation, dimerized STAT4 translocates to the nucleus to regulate genes critical for immune responses. Spliced isoforms, STAT4α and STAT4β, exhibit distinct functions, with STAT4α inducing higher IFN-γ production and STAT4β enhancing IL-12-driven proliferation. STAT4-deficient models underscore its importance in Th1 differentiation, NK cell activity, and IL-12 signaling.

Background

Signal transducer and activator of transcription 4 (STAT4) is a member of the STAT family, primarily expressed in T cells, NK cells, and to a lesser extent, monocytes, macrophages, and dendritic cells upon activation. STAT4 plays a crucial role in cell-mediated immunity, particularly in response to IL-12 stimulation, by promoting Th1 differentiation and IFN-γ production. Structurally, STAT4 contains six domains: an N-terminal domain for dimerization and nuclear translocation, a coiled-coil domain for regulatory factor binding, a DNA-binding domain for enhancer interaction, a linker domain for DNA binding facilitation, an SH2 domain for receptor binding post-phosphorylation, and a C-terminal transactivation domain for gene activation. Activated through phosphorylation, dimerized STAT4 translocates to the nucleus to regulate genes critical for immune responses. Spliced isoforms, STAT4α and STAT4β, exhibit distinct functions, with STAT4α inducing higher IFN-γ production and STAT4β enhancing IL-12-driven proliferation. STAT4-deficient models underscore its importance in Th1 differentiation, NK cell activity, and IL-12 signaling.

References
[1] Yang C, et al. Int J Biol Sci. 2020 Mar 5;16(9):1575-1585. [2] Frucht DM, et al. J Immunol. 2000 May 1;164(9):4659-64.

PVDFメンブレン孔径参考表

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

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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%