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T1021

Sigma-Aldrich

胰蛋白酶抑制剂 来源于大豆

Isoelectric focusing marker, pI 4.6

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别名:
SBTI
CAS号:
9035-81-8
EC 号:
232-906-9
MDL编号:
MFCD00082103
UNSPSC代码:
12352200
NACRES:
NA.77

生物来源

Glycine max (soybean)

质量水平

200

形式

powder

分子量

20,100 Da

技术

isoelectric focusing (IEF): suitable

pI 

4.6

溶解性

balanced salt solution: 1 mg/mL
concentrate: >10 mg/mL, hazy, amber-yellow
phosphate buffer: 10 mg/mL
water: 10 mg/mL
serum-free medium: soluble

运输

ambient

储存温度

−20°C

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生化/生理作用

该抑制剂能够在较小程度上抑制胰蛋白酶、胰凝乳蛋白酶和纤溶酶。它还能抑制蛋白酶血浆激肽释放酶和凝血因子X，机制与抑制胰蛋白酶类似。胰蛋白酶抑制剂不会抑制金属蛋白酶、基于组织的激肽释放酶、酸性蛋白酶或硫代蛋白酶。该抑制剂通过与蛋白酶活性位点按1:1化学计量形成复合物，然后在抑制剂上切割单个精氨酸-异亮氨酸键。抑制作用是可逆的且具有pH依赖性。

组分

The soybean trypsin inhibitor is a monomeric protein containing 181 amino acid residues in a single polypeptide chain crosslinked by two disulfide bridges.

单位定义

一个胰蛋白酶单位是指在25°C、pH 7.6条件下，以N-α-苯甲酰基-L-精氨酸乙酯（BAEE）为底物，每分钟产生0.001的 A253所需的酶量。
One trypsin unit = A253 of 0.001 per minute with N-alpha-benzoyl-L-arginine ethyl ester (BAEE) as substrate at pH 7.6 at 25 °C.

制备说明

胰蛋白酶抑制剂能够以10 mg/mL溶于水和磷酸盐缓冲液。它能够以1 mg/mL溶于平衡盐溶液和无血清培养基中。浓度大于10 mg/mL的浓缩液可能浑浊，呈黄色至琥珀色。使用胰蛋白酶消化细胞后，重悬于胰蛋白酶抑制剂溶液中，使得用于解离的胰蛋白酶溶液浓度达到1 mg/mL。然后将细胞悬浮液以1000rpm离心，得到细胞沉淀。

在2-8℃下短期储存时，溶液可保持活性。溶液分装后可在-20℃冷冻并保持稳定。

法规信息

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分析证书(COA)

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

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  4. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. What is the molecular weight and amino acid sequence of trypsin inhibitor from Glycine max (soybean)?   

    Soybean trypsin inhibitor is a mixture of the three types. We have not characterized our trypsin inhibitor products in terms of how much of each of the three types may be present. All three have a molecular weight of between 20,000 and 20,200 daltons, so one might use 20,100 daltons as an average.The three types vary in the amino acids at a few positions. The detailed summary of the three types (or variants) was published in the following linked reference:     J. Biochem. (Japan), 98, 435-448 (1985).Note that the authors use Tia, Tib and Tic to indicate the three variants.

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实验方案

胰蛋白酶抑制剂

天然胰蛋白酶抑制剂也称为丝氨酸蛋白酶抑制剂（serpins），是最大和最多样化的蛋白酶抑制剂家族。Serpins通过抑制体内丝氨酸蛋白酶来控制蛋白质的活化和分解代谢。

Trypsin Inhibitors

Natural trypsin inhibitors (serpins) regulate protein activation and catabolism by inhibiting serine proteases in vivo.

Chromatograms

application for HPLC

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