Mutation detail:
| Mutation site | del27267-27300 |
| Virus | SARS-CoV-2 |
Mutation level  |
Nucleotide level |
| Gene/protein/region type | ORF6 |
| Gene ID | 43740572 |
| Country | France |
| Mutation type |
- |
| Genotype/subtype/clade | - |
| Sample |
Human |
| Variants | Alpha |
| Viral reference sequence | NC_045512.2 |
| Drug/antibody/vaccine | - |
| Transmissibility |
- |
| Transmission mechanism | - |
| Pathogenicity |
- |
| Pathogenicity mechanism | - |
| Immune escape mutation | - |
| Immune escape mechanism | - |
| RT-PCR primers probes | - |
Protein detail:
| Protein name | ORF6 protein |
| Uniprot protein ID | P0DTC6 |
| Protein length | 61 amino acids |
| Protein description | ORF6 encodes a viral accessory protein. Based on its similarity to other coronavirus proteins, ORF6 protein is thought to play a role in viral pathogenesis.The functions of orf6 are as follows: 1) it binds the nsp8 in the replication\transcription complex which reflects its importance for the viral replication, 2) it increases the infection titer, 3) it contributes to the evasion of the virus to the host immune system through inhibition of the interferon induction and signaling pathway; it inhibits the Signal Transduction and Activator of Transcription (STAT 1), and 4) it participates in the formation of the DMV in the host cells which helps in protein trafficking to ensure the assembling of the virus. |
Literature information:
| Pubmed ID | 33399033 |
| Clinical information | Yes |
| Disease | - |
| Published year | 2021 |
| Journal | Emerging Microbes & Infections |
| Title | Characterization of SARS-CoV-2 ORF6 deletion variants detected in a nosocomial cluster during routine genomic surveillance, Lyon, France |
| Author | Gregory Queromes, Gregory Destras, Antonin Bal, Hadrien Regue, Gwendolyne Burfin |
| Evidence | During routine molecular surveillance of SARS-CoV-2 performed at the National Reference Center of Respiratory Viruses (Lyon, France) (n = 229 sequences collected February-April 2020), two frameshifting deletions were detected in the open reading frame 6, at the same position (27267). While a 26-nucleotide deletion variant (D26) was only found in one nasopharyngeal sample in March 2020, the 34-nucleotide deletion (D34) was found within a single geriatric hospital unit in 5/9 patients and one health care worker in April 2020. Phylogeny analysis strongly suggested a nosocomial transmission of D34, with potential fecal transmission, as also identified in a stool sample. No difference in disease severity was observed between patients hospitalized in the geriatric unit infected with WT or D34. In vitro D26 and D34 characterization revealed comparable replication kinetics with the wild-type (WT), but differential host immune responses. |