生物来源
human pancreas
质量水平
形式
solution
比活
50-55 units/mg protein carboxypeptidase B
杂质
≤0.2% chymotrypsin
≤0.2% trypsin
≤1 unit/mg protein carboxypeptidase A
UniProt登记号
运输
dry ice
储存温度
−20°C
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)
InChI key
TWURVFFNODFJBJ-UHFFFAOYSA-N
基因信息
human ... CPB1(1360)
相关类别
一般描述
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。
应用
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。
生化/生理作用
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。
单位定义
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
外形
溶于0.05 M NaOAc（pH 5.0）、1.0 M NaCl、0.01％NaN3中的溶液
WGK
WGK 1
闪点(°F)
Not applicable
闪点(°C)
Not applicable
法规信息
常规特殊物品
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'
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
Saurabh Chatterjee et al.
Free radical biology & medicine, 46(4), 454-461 (2008-12-04)
Post-translational modification of proteins due to exposure to radicals and other reactive species are markers of metabolic and inflammatory oxidative stress such as sepsis. This study uses the nitrone spin-trap DMPO and a combination of immuno-spin trapping and mass spectrometry
Lawrence L K Leung et al.
Advances in experimental medicine and biology, 632, 61-69 (2008-11-26)
Thrombin-activatable procarboxypeptidase B (proCPB or thrombin-activatable fibrinolysis inhibitor or TAFI) is a plasma procarboxypeptidase that is activated by the thrombin-thrombomodulin complex on the vascular endothelial surface. The activated CPB removes the newly exposed carboxyl terminal lysines in the partially digested
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)
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