Molecular recognition and regulation of human angiotensin-I converting enzyme (ACE) activity by natural inhibitory peptides.

Molecular recognition and regulation of human angiotensin-I converting enzyme (ACE) activity by natural inhibitory peptides.
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DOI:
10.1038/srep00717
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发表时间:
2012
期刊:
影响因子:
4.6
通讯作者:
Acharya KR
Acharya KR
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Masuyer G;Schwager SL;Sturrock ED;Isaac RE;Acharya KR

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血管紧张素转换酶(ACE)是一种双结构域二肽羧肽酶,在肾素-血管紧张素-醛固酮和激肽释放酶-激肽系统中起重要作用,是血压的关键调节因子。因此,它是治疗心血管疾病的重要药物靶点。ACE主要以其将血管紧张素I(Ang I)裂解为血管活性八肽血管紧张素II(Ang II)的能力而闻名,但也能够裂解许多其他底物,包括血管扩张剂缓激肽和N-乙酰基-Ser-Asp-Lys-Pro(Ac-SDKP),其是造血的生理调节剂。我们第一次提供了一个详细的生化和结构基础的天然肽抑制剂的ACE,缓激肽增强肽B和血管紧张素II的结构域选择性。此外,血管紧张素II显示出选择性竞争抑制人体ACE的羧基末端结构域提供证据的人肾素-血管紧张素系统(RAS)的调节作用。
Angiotensin-I converting enzyme (ACE), a two-domain dipeptidylcarboxypeptidase, is a key regulator of blood pressure as a result of its critical role in the renin-angiotensin-aldosterone and kallikrein-kinin systems. Hence it is an important drug target in the treatment of cardiovascular diseases. ACE is primarily known for its ability to cleave angiotensin I (Ang I) to the vasoactive octapeptide angiotensin II (Ang II), but is also able to cleave a number of other substrates including the vasodilator bradykinin and N-acetyl-Ser-Asp-Lys-Pro (Ac-SDKP), a physiological modulator of hematopoiesis. For the first time we provide a detailed biochemical and structural basis for the domain selectivity of the natural peptide inhibitors of ACE, bradykinin potentiating peptide b and Ang II. Moreover, Ang II showed selective competitive inhibition of the carboxy-terminal domain of human somatic ACE providing evidence for a regulatory role in the human renin-angiotensin system (RAS).
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