产品名称
羧肽酶 B 来源于人类胰腺, 50-55 units/mg protein carboxypeptidase B
SMILES string
S(Cc3ccccc3)C(=O)C(NC(=O)C2N(CCC2)C(=O)C(NC(=O)C(NC(=O)CCC(=O)O)C)C)Cc1ccccc1
InChI key
TWURVFFNODFJBJ-UHFFFAOYSA-N
InChI
1S/C31H38N4O7S/c1-20(32-26(36)15-16-27(37)38)28(39)33-21(2)30(41)35-17-9-14-25(35)29(40)34-24(18-22-10-5-3-6-11-22)31(42)43-19-23-12-7-4-8-13-23/h3-8,10-13,20-21,24-25H,9,14-19H2,1-2H3,(H,32,36)(H,33,39)(H,34,40)(H,37,38)
biological source
human pancreas
form
solution
specific activity
50-55 units/mg protein carboxypeptidase B
impurities
≤0.2% chymotrypsin
≤0.2% trypsin
≤1 unit/mg protein carboxypeptidase A
UniProt accession no.
shipped in
dry ice
storage temp.
−20°C
Quality Level
Gene Information
human ... CPB1(1360)
Application
来自Sigma的羧肽酶B作为参考标准品，已被用作测定源自大鼠前叶和中叶的裂解垂体颗粒中羧肽酶活性。 该酶还已被用于通过去除C末端碱性氨基酸对血浆样品进行消化，从而在C4电泳过程中为每种同种异型片段获得独特的条带。
Biochem/physiol Actions
羧肽酶B（CPB1）基因的突变与胰腺癌发生和发展的敏感性增加有关。 CPB1水平升高与低度乳腺肿瘤和淋巴结阳性1级肿瘤相关。
羧肽酶B（或肽基-L-赖氨酸（-L-精氨酸）水解酶）可催化碱性氨基酸，赖氨酸、精氨酸和鸟氨酸从多肽的C端水解。研究显示其为34,000Da的单链多肽。胰蛋白酶能够在体外将天然酶转化为活性酶羧肽酶B II。 其最适pH为9.0。该酶可通过连续切割C端碱性氨基酸从而用于序列分析。它也可以用作诊断急性胰腺炎的血清标志物。
General description
羧肽酶B定位于人类染色体3q24上。 羧肽酶B属于羧肽酶的A/B亚家族。
Other Notes
在pH7.7，25℃条件下，一个单位每分钟可水解1 μmole马尿酰-L-精氨酸
Physical form
溶于0.05 M NaOAc（pH 5.0）、1.0 M NaCl、0.01％NaN3中的溶液
存储类别
12 - Non Combustible Liquids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
法规信息
常规特殊物品
此项目有
E Sim et al.
The Biochemical journal, 239(3), 763-767 (1986-11-01)
The plasma complement protein C4 is encoded at two highly polymorphic loci, A and B, within the class-III region of the major histocompatibility complex. At least 34 different polymorphic variants of human C4 have been identified, including non-expressed or 'null'
Human procarboxypeptidase B: three-dimensional structure and implications for thrombin-activatable fibrinolysis inhibitor (TAFI)
Pereira PJB, et al.
Journal of Molecular Biology, 321(3), 537-547 (2002)
Combined proteomics and transcriptomics identifies carboxypeptidase b1 and nuclear factor kappaB (NF-kappaB) associated proteins as putative biomarkers of metastasis in low grade breast cancer
Bouchal P, et al.
Molecular and Cellular Proteomics, 14(7), 1814-1830 (2015)
Mutations in the pancreatic secretory enzymes CPA1 and CPB1 are associated with pancreatic cancer
Tamura K, et al.
Proceedings of the National Academy of Sciences of the USA, 201720588-201720588 (2018)
Xiu Qin Xu et al.
The Journal of biological chemistry, 280(25), 23987-24003 (2005-04-23)
We have exploited a discrepancy in the oncogenic potential of autocrine and exogenous human growth hormone (hGH) in an attempt to identify molecules that could potentially be involved in oncogenic transformation of the human mammary epithelial cell. Microarray analysis of
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