Enzima conversora da angiotensina 2 Estrutura e função | Menu de navegação1R423.4.17.23IntEnzBRENDANiceZymeKEGGvia metabólicaPRIAMRCSB PDBPDBePDBjPDBsumartigosartigosexpandindo-oe

Fisiologia do sistema circulatórioEC 3.4Sistema renina-angiotensina-aldosterona


PubMed CentralartigosPubMedartigosenzimasistema renina angiotensina aldosteronaangiotensina IIangiotensina 1-7enzima conversora da angiotensinapeptidasebradicininagrelina










































































































































































































































































































































































































































































































































































































































































































































































































































































Enzima conversora da angiotensina 2


Representação da estrutura da enzima conversora da angiotensina 2. PDB 1R42
Indicadores

Número EC

3.4.17.23
Bases de dados

IntEnz

IntEnz

BRENDA

BRENDA

ExPASy

NiceZyme

KEGG

KEGG

MetaCyc

via metabólica

PRIAM

PRIAM
Estruturas PDB

RCSB PDB PDBe PDBj PDBsum





A enzima conversora da angiotensina 2 ECA 2 é uma enzima componente do sistema renina angiotensina aldosterona. É responsável pela conversão da angiotensina II em angiotensina 1-7(Ang 1-7). Sua importância médica reside no fato de estar relacionada a patogênese de várias desordens cardiovascular, como por exemplo, hipertensão, arteriosclerose e infarto do miocárdio.


A enzima conversora da angiotensina(ECA) é produzida pelos vasos pulmonares e age sobre a angiotensina-1, transformando-a em angiotensina-2.



Estrutura e função |


A ECA 2 é uma proteína transmembranar formada por 805 aminoácidos, que contém um ecto domínio na porção extracelular (aminoácidos 18-739), uma região transmembrana (740-768) e uma calda intracelular. A porção extracelular contém um domínio catalítico, sendo 42% idêntico ao da ECA.


A ECA 2 possui função de peptidase dependente da porção C terminal do substrato,necessitando de um resíduo hidrofóbico ou básico precedido pelo menos por uma prolina (Pro). Desempenhando fortemente essa função para angiotensina II, angiotensina I e bradicinina. Além disso, ECA 2 pode hidrolisar outros peptídeos como apelina 13 e grelina. No entanto, o produto mais ativo da ECA 2 é a angiotensina 1-7 a partir da hidrólise de angiotensina II ou a partir de angiotensina I, a partir deste último com ação conjunta com outras enzimas. [1].








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  1. ↑ Jiang, F., Yang, J., Zhang, Y., Dong, M., Wang, S., Zhang, Q., ... & Zhang, C. (2014). Angiotensin-converting enzyme 2 and angiotensin 1-7: novel therapeutic targets. Nature Reviews Cardiology, 11(7), 413-426.







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