SARS-CoV-2 Pseudoviral Particles, Deltacron Variant

• Cat.No.: SARS-CoV-2-10PsV
• Product Overview: Our SARS-CoV-2-Deltacron Pseudoviral Particles are replication-deficient MLV pseudotyped with the SARS-CoV-2 spike protein of the Deltacron variant. They also They establish a pseudovirus cell entry assay mediated by the SARS CoV-2 spike protein that can be conveniently measured via luciferase reporter activity. This pseudovirus assay isolates the SARS-CoV-2 viral entry from other steps of the viral infection cycle.

Specification

• Species: SARS-CoV-2
• Description: It has been known that SARS coronavirus 2 (SARS-CoV-2) uses human ACE2 as entry receptor and human proteases as entry activators. The virus surface spike protein (S) mediates SARS-CoV-2 entry into cells. To fulfill its function, SARS CoV-2 spike binds to its human ACE2 (hACE2) receptor through its receptor-binding domain (RBD) and is proteolytically activated by human proteases.
• Usage: Note: requires a luciferase assay reagent.
  Cell Infection:
  1. Count HEK293-ACE2 cells to be infected and seed ~20K cells per well into appropriate 96-well plates (50 μL per well) DMEM with 10% Serum (no antibiotics) or 5K cells per well into appropriate 384-well plates (15 μL per well).
  2. Culture cells overnight to make sure the cells stably adhere to the plates.
  3. On the 2nd day, remove media, add 50 μL SARS-CoV-2 Deltacron pseudoviral particles* into each well (12.5 μL for 384-well plate). Spin at 700 rpm for 15 min at 4 centigrade.
  *Note: thaw the pseudoviral particles quickly in the room temperature water (< 30 minutes, do not shake) and use right away. Discard the unused portion (do not re-freeze or leave it on ice for later use).
  4. Incubate for 2 hrs at 37 centigrade.
  5. Add 50 μL DMEM with 10% FC into each well (12.5 μL for 384-well plates).
  6. Incubate for 48 hrs at 37 centigrade.
  Measurement of Luciferase Activity in Infected cells
  1. Remove the medium (this would result cleaner results. It is OK not to remove the medium in order to obtain higher RLU). Add 100 μL luciferase assay reagent (25 μL for 384-well plates).
  2. Read in a luminescence plate reader and record the data. (Note: the RLU values are higher from the 96-well.)
• Applications: Our Pseudovirus Particles generate robust chemiluminescent signals in cell assays when coupled with our firefly luciferase assay kit, useful for:
  1) screening potential inhibitor to block SARS-CoV-2 entry and viral protein translation;
  2) measuring the activity of and screening for neutralizing antibody against SARS-CoV-2-Deltacron.
• Shelf Life: Six months from the date of shipping when stored at -70 centigrade.
• Features: Robust: Excellent signal to noise (basal) ratio
  Easy to use: Amenable to HTS format (96-well, 384-well and 1536-well format)
• Storage: At -70 centigrade.
• Shipping: Shipped on dry ice.