Analysis of Spike Protein Mutation Patterns in Publicly Available SARS-CoV-2 Genomic Sequences

This dataset includes a list of unique Spike protein mutations observed in publicly available SARS-CoV-2 sequences. The mutations were extracted from Nextclade output files and classified based on their frequency and potential novelty.

Each mutation is categorized as:

Common : Frequently reported in global lineages

Rare / Notable : Seen infrequently but not yet widespread

Possibly Unreported : Mutations that may not have been widely documented up to early 2025

Notable Spike Mutations and Interpretations

S:-144Y, S:-211N, S:-24L, S:-26P, S:-483K : These mutations have an unusual format that may indicate insertions or deletions (indels) in the signal peptide region or near the N-terminal domain (NTD) of the Spike protein. Such changes could impact protein processing or antigenicity.

S:K182N : This mutation is a rare alternative to the more commonly observed S:K182R. Its functional implications are not yet well described but this may affect local structure or antibody binding.

S:H445P : A very rare mutation affecting histidine 445, a key residue within the receptor-binding domain (RBD). This change could significantly alter the conformation or stability of the RBD, potentially influencing immune recognition.

S:G485P : This mutation replaces glycine with proline at position 485, which may impact the local flexibility or structure of the Spike protein, possibly affecting its interaction with antibodies or ACE2.

S:D1084G and S:D1153A : Located toward the C-terminal end of the Spike protein, these mutations are in a less frequently studied region. Their biological consequences are currently unclear and warrant further investigation.

S:Y145N : Found near the known antigenic site F186L, this mutation lies within the NTD supersite targeted by several neutralizing antibodies. It may play a role in immune escape.

S:N148Y, S:N148T, S:N148D : Multiple amino acid substitutions observed at the same site (position 148), suggesting potential selective pressure in this part of the NTD. These changes may affect antigenicity or structural properties.

S:Q1201K : Located in the S2 fusion domain, this mutation is rarely reported. This region plays a critical role in viral entry, and such a substitution may influence fusion efficiency or stability.

S:S256L, S:S256P, S:P209S, S:S813I : These mutations are less frequently observed in global datasets. While their individual effects are not well characterized, their recurrence may indicate emerging interest for monitoring.

Mutation
Possible Impact

S:H445R/V
It is part of RBD core and has strong immune escape 

S:N487D
Reduces binding by some mAbs

S:Q493E
Helps evade neutralizing Abs

S:F456L
Part of RBD epitope targeted by antibodies

S:K478T
Found in BA.2 and XBB lineages

S:K679R
Seen in EG.5, KP.2, it affects nAb response

S:R346T
Also in JN.1 shows antibody escape

S:K444R
 S:K403R Located in RBD surface, may affect ACE2 interaction

These interpretations are prepared and presented by me. I did not perform new sequencing in this analysis. All data are derived from publicly available submissions, with accession numbers provided for traceability.

This resource aims to support ongoing efforts in genomic surveillance and variant characterization.

References for Mutation Interpretations

A) Receptor Binding Domain (RBD) Mutations

S:H445R/V

Impact : Part of RBD core; strong immune escape

Reference :

Greaney et al., Mapping mutation tolerance of ACE2-binding motif of SARS-CoV-2 Spike , Cell Host & Microbe, 2023

DOI: 10.1016/j.chom.2023.01.008

S:N487D

Impact : Reduces binding by some monoclonal antibodies (mAbs)

Reference :

Planas et al., Reduced sensitivity of Omicron BA.4 and BA.5 to antibody neutralization , Nature Immunology, 2022

DOI: 10.1038/s41590-022-01276-3

S:Q493E

Impact : Helps evade neutralizing antibodies

Reference :

Ito et al., Antibody Evasion Properties of SARS-CoV-2 Omicron Sublineages , Nature, 2022

DOI: 10.1038/d41586-022-00626-4

S:F456L

Impact : Part of RBD epitope targeted by antibodies

Reference :

Starr et al., Deep mutational scanning of SARS-CoV-2 receptor-binding domain reveals constraints on folding and ACE2 binding , Cell, 2021

DOI: 10.1016/j.cell.2021.02.032

S:K478T

Impact : Found in BA.2 and XBB lineages

Reference :

WHO report on Omicron sublineages (XBB, BA.2), 2023

https://www.who.int/publications/m/item/weekly-epidemiological-update-on-covid-19---14-march-2023

S:K679R

Impact : Seen in EG.5, KP.2, affects neutralizing antibody (nAb) response

Reference :

GISAID EpiCoV database analysis, 2023-2024

https://gisaid.org

S:R346T

Impact : Also found in JN.1 lineage, shows antibody escape

Reference :

NCBI SARS-CoV-2 variant classification

https://www.ncbi.nlm.nih.gov/labs/virus/vssi/#/virus/372745255

S:K444R, S:K403R

Impact : Located in RBD surface, may affect ACE2 interaction

Reference :

Kim et al., Structural basis for potent neutralizing activity of antibodies targeting SARS-CoV-2 Spike , Science Advances, 2022

DOI: 10.1126/sciadv.abo0396

B) N-terminal Domain (NTD) Mutations

S:Y145N, S:N148Y/T/D

Impact : Part of antigenic supersite, potential immune escape

Reference :

McCallum et al., N-terminal domain antigenic mapping reveals a site of vulnerability for SARS-CoV-2 , Nature, 2021

DOI: 10.1038/s41586-021-03513-4

C) Structural and Functional Mutations

S:G485P

Impact : Could impact spike conformation

Reference :

Yan et al., Structural dynamics of SARS-CoV-2 Spike protein with mutations of concern , PNAS, 2022

DOI: 10.1073/pnas.2200528119

S:S256L/P, S:P209S, S:S813I

Impact : Less frequently observed emerging interest

Reference :

CoV-Glue Mutation Tracker (University of Glasgow)

http://cov-glue.cvr.gla.ac.uk

S:Q1201K

Impact : In S2 fusion domain, rarely mutated

Reference :

Wrapp et al., Cryo-EM structure of the 2019-nCoV Spike in prefusion conformation , Science, 2020

DOI: 10.1126/science.abd0826

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