| General information | |
| ACovPid: | ACoVP100032 |
| Trivial Name: | EK1 |
| Amino Acids Sequence: | SLDQINVTFLDLEYEMKKLEEAIKKLEESYIDLKEL |
| Length: | 36 |
| C-Terminal Modification: | None |
| N-Terminal Modification: | None |
| Chemical Modification: | None |
| Peptide Source: | Human coronavirus OC43 (HCoV-OC43) : 31631 |
| Source Description: | Peptide OC43-HR2P was derived from the HR2 domain of HCoV-OC43. EK1 was the optimized form of OC43-HR2P,and EK1C4 was the optimized form of EK1. |
| Against Virus: | Human coronavirus 229E (HCoV-229E) : 11137 |
| Inhibition Value Type: | IC50 |
| Inhibitory Effect: | 0.2074 |
| Inhibitory Unit: | µM |
| Target Domain Name: | HR1 domain of HCoV-229E |
| Assay: | Cell–cell fusion assay |
| Assay Description: | The establishment and detection of several cell–cell fusion assays are as previously described. In brief, Huh-7 cells (for testing all coronaviruses) or 293T/ACE2 cells (for testing SARS-CoV-2) were used as target cells. For preparing effector cells expressing S protein a coronavirus, 293T cells were transfected with one of the S protein expression vectors, including 293T/SARS-CoV-2/GFP, 293T/MERS-CoV/GFP, 293T/HCoV-229E/GFP, 293T/SARS-CoV/GFP, or 293T/SL-CoV/GFP, 293T/HCoV-OC43/GFP, 293T/HCoV-NL63/GFP or empty plasmid pAAV-IRES-EGFP. For SARS-CoV S-, SL-CoV S-, OC43 S- or NL63 S-mediated cell–cell fusion assays, effector cells and target cells were cocultured in DMEM containing trypsin (80 ng/mL) for 4 h, while for SARS-CoV-2 and MERS-CoV S-mediated cell–cell fusion assays, effector cells and target cells were cocultured in DMEM without trypsin but 10% FBS for 2 h. After incubation, five fields were randomly selected in each well to count the number of fused and unfused cells under an inverted fluorescence microscope (Nikon Eclipse Ti-S). |
| Anti-CoV activity in vivo: | |
| Reference: | 32231345 |
| Comment: | |
| 3D structure: | |
| Structure Experiment Verified: | NO |
| Similar Peptides: | ACoVP100015 ACoVP100014 ACoVP100013 ACoVP100001 ACoVP100011 |
| Target Domain information | |
| Target Domain Full Name: | Heptad repeat 1 (HR1) domain of Human coronavirus 229E (HCoV-229E) spike glycoprotein |
| Target Type: | glycoprotein |
| UniprotID [Sequence]: | P15423 [767-886] |
| Target Synonyms: | Alternative name(s) for spike glycoprotein: E2 Peplomer protein S glycoprotein |
| Target Source: | Human coronavirus 229E (HCoV-229E) : 11137 |
| Target Structure: | 5YL9, 5ZHY, 5ZUV, 6ATK, 6U7H, 7CYC, 7CYD |