Reactivity | PoSpecies Glossary |
Applications | Enzyme Activity |
Format | Carrier-Free |
Details of Functionality | Measured by its ability to cleave a fluorogenic peptide substrate, Mca-YVADAPK(Dnp)-OH (Catalog # ES007). The specific activity is >35 pmol/min/μg, as measured under the described conditions. |
Source | Human embryonic kidney cell, HEK293-derived porcine ACE-2 protein Gln18-Thr740 with a C-terminal 6-His tag |
Accession # | |
N-terminal Sequence | No results obtained. Gln18 inferred from enzymatic pyroglutamate treatement revealing Ser19. |
Protein/Peptide Type | Recombinant Enzymes |
Purity | >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining. |
Endotoxin Note | <0.10 EU per 1 μg of the protein by the LAL method. |
Dilutions |
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Theoretical MW | 84 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors. |
SDS-PAGE | 109-116 kDa, under reducing conditions |
Storage | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
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Buffer | Supplied as a 0.2 μm filtered solution in Tris, NaCl, ZnCl2 and Glycerol. |
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Purity | >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining. |
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Assay Procedure |
*Adjusted for Substrate Blank **Derived using calibration standard MCA-Pro-Leu-OH (Bachem, Catalog # M-1975). Per Well:
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Angiotensin I Converting Enzyme (ACE-2), also called ACEH (ACE homologue), is a dimeric, zinc-dependent metalloprotease of the ACE family that also includes somatic and germinal ACE (1, 2). ACE-2 mRNA is found at high levels in heart, testis, and kidney and at lower levels in a wide variety of tissues (1, 3). ACE-2 is the SARS-CoV and SARS-CoV2 Spike protein receptor in vivo (4-6), functions catalytically as a carboxypeptidase to cleave several substrates including angiotensins I and II, and acts as a partner for B0AT1-family amino acid transporters (1, 2). Through these functions, ACE-2 has been shown to be involved in several diseases including SARS, COVID19, acute lung injury (4, 7), heart disease (8), liver and lung fibrosis (9), inflammatory lung disease (10), and cardiopulmonary disease (11). Full length ACE-2 protein includes an extracellular region composed of a single N-terminal peptidase domain and C-terminal collectrin-like domain (CLD), a transmembrane domain, and a short cytoplasmic tail (12). The N-terminal peptidase region is required for binding to SARS-CoV and SARSCoV2 spike proteins, while the CLD contains a region that promotes dimerization and association with amino acid transporters (2). The peptidase domain contains a long deep cleft that undergoes a large hinge-bending movement at substrate and inhibitor binding (12). Classical ACE inhibitors such as captopril and lisinopril do not inhibit ACE-2 activity and inhibitors of ACE-2 do not inhibit ACE activity (13). Porcine ACE-2 shares about 79% amino acid identity with human ACE-2.
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Tiny Antibodies (VHHs) from Llama Neutralize Respiratory Coronaviruses By Jamshed Arslan, Pharm. D., PhD. VHH Single Domain Antibodies vs Conventional AntibodiesThe immune system protects living organisms against harmful substances. B cells ward off infections by producing antibodies t... Read full blog post. |
Blocking SARS-CoV-2 Cell Entry: A potential Strategy Against COVID-19 Pandemic By Jamshed Arslan, Pharm. D., PhD. Coronaviruses are a family of enveloped RNA viruses. Some family members circulate in human populations, but others like severe acute respiratory syndrome coronavirus (SARS-CoV) ar... Read full blog post. |
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