AVM v1, released 02-OCT-22

A manually curated database of aerosol-transmitted virus mutations, human diseases, and drugs

Mutation detail:


Mutation site 27769C>T
Virus SARS-CoV-2
Mutation level Nucleotide level
Gene/protein/region type ORF7b
Gene ID
Country UK
Mutation type -
Genotype/subtype/clade -
Sample Human
Variants -
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 ORF7b
Uniprot protein ID -
Protein length 43 amino acids
Protein description ORF7b encodes a viral accessory protein. Based on its similarity to other coronavirus proteins, ORF7b protein is thought to localize to the Golgi compartment. The orf7b is a hydrophobic protein with a transmembrane domain N-terminal at the outside, and a cytoplasmic C-terminal. Similar to orf7a, orf7b is reported by the majority of the previous studies that it is not essential for virus replication.

Literature information:


Pubmed ID 33931941
Clinical information No
Disease -
Published year 2021
Journal EMBO Molecular Medicine
Title SARS-CoV-2 worldwide replication drives rapid rise and selection of mutations across the viral genome: a time-course study-potential challenge for vaccines and therapies
Author Stefanie Weber, Christina M Ramirez, Barbara Weiser, Harold Burger, Walter Doerfler
Evidence We examined mutations in 383,570 complete sequences with known sampling dates in GISAID up until January 20, 2021. Figure 1 shows the worldwide distribution of Spike mutations as well as other variants of interest over time from April 2020 to March 31, 2021, from complete sequences with a known collection date deposited in GISAID. Table 1 lists the signature mutations for the variants. Table 2 shows the total number of complete sequences each variant of interest (B.1.1.7 (the UK variant), 501Y.V2 (the South African variant) and 484K.V2 (B.1.1 lineage with S: E484K/D614G, V1176F N: A199S/R203K/G204R) deposited in GISAID by each country as of March 31, 2021.