Table 1.
Recommended standard names. Recommended standard names for each of six ORFs overlapping S, ORF3a, or N, in 5′–3′ order, and the shorter isoform of ORF3d, with number of codons, coordinates, and a list of other names that have been used in previous publications or preprints. Codon counts and coordinates do not include the stop codon. Coordinates are with respect to the Wuhan-Hu-1 reference genome (NCBI: NC_045512.2). Frame +1 or +2 indicates that codons are shifted one or two nucleotides, respectively, in the 3′ direction from codons in the main (larger) ORF, which occupies frame +0.
| Recommended ORF name | Length (codons) | Coordinates | Frame relative to main (+0) ORF | Other names used (not recommended) | SARS-CoV homolog |
|---|---|---|---|---|---|
| ORF2b | 39 | 21744-21860 | +1 (S) | S.iORF1 | None |
| ORF3c | 41 | 25457-25579 | +1 (ORF3a) | ORF3h, 3a.iORF1, ORF3b | Unnamed |
| ORF3d ORF3d-2 |
57 33 |
25524-25694 25596-25694 |
+2 (ORF3a) +2 (ORF3a) |
ORF3b, ORF3c 3a.iORF2 |
None None |
| ORF3b | 22 | 25814-25879 | +1 (ORF3a) | 5′ end of ORF3b | |
| ORF9b | 97 | 28284-28574 | +1 (N) | ORF9a, N.iORF1 | ORF9b |
| ORF9c | 73 | 28734-28952 | +1 (N) | ORF9b, ORF14 | ORF9c, ORF14 |