Aliarcobacter butzleri is an emerging foodborne and zoonotic pathogen, yet many of its encoded proteins remain functionally uncharacterized. This lack of annotation limits understanding of its molecular mechanisms and hampers the identification of novel therapeutic targets. In this study, we systematically performed functional annotation of essential hypothetical proteins from the BNI-3166 strain using an integrative-in-silico approach to uncover potential drug and vaccine candidates. 2,367 protein-coding sequences were retrieved from the RefSeq database and were identified 356 as hypothetical proteins. Using BLASTp, we screened these HPs against the Database of Essential Genes and the human proteome to identify essential non-homologous proteins, resulting in 20 ENH candidates. Functional annotation was performed using several domain-based databases, including Pfam, InterPro, SMART, and SUPERFAMILY. Subsequently, physicochemical properties were analyzed and predicted subcellular localization using PSORTb and CELLO. To assess druggability, the ChEMBL database was used. Virulence factors using VFDB, VICMpred, and VirulentPred 2.0 were also predicted. Gene Ontology annotations were generated via ARGOT2.5. Furthermore, we explored protein-protein interactions using STRING and predicted tertiary structures with AlphaFold3. Moreover, Ligand binding pockets were predicted using PrankWeb, and antigenicity of vaccine candidates was assessed using VaxiJen v2.0. We identified 20 essential non-homologous hypothetical proteins, of which 10 were confidently annotated based on conserved domain analysis. These proteins were classified as enzymes, binding proteins, transporters, regulatory proteins, and potential virulence factors. Among them, eight exhibited characteristics of promising drug targets, while two showed potential as vaccine candidates based on subcellular localization. Druggability analysis revealed that nine proteins had no similarity to known drug targets, suggesting novel therapeutic potential. Predicted 3D structures generated using AlphaFold3 yielded pTM scores ranging from 0.44 to 0.92, indicating acceptable to high modeling confidence. Ligand binding site analysis confirmed druggability in six candidates, and antigenicity screening identified one protein as a potential vaccine target. This study provides a computational framework for identifying functionally important proteins in A. butzleri BNI-3166 and highlights novel therapeutic candidates for experimental validation, offering new directions in drug and vaccine development against this underexplored pathogen.
Key words: Aliarcobacter butzleri, Drug Target Identification, Functional Annotation, Hypothetical Proteins, In Silico Analysis
Received: 08.07.2025; Accepted: 01.09.2025; Early view: 24.09.2025 Published: 10.01.2026
DOI: 10.62063/ecb-66
Citation: Paul, S., Barua, S., & Barua, J.D. (2026). In-silico functional annotation and structural characterization of hypothetical proteins from Aliarcobacter butzleri BNI-3166: Insights into novel virulence and drug targets. The European chemistry and biotechnology journal, 5, 22-39. https://doi.org/10.62063/ecb-66
The copyrights of the studies published in The European Chemistry and Biotechnology Journal (EUCHEMBIOJ) belong to their authors
This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)(https://creativecommons.org/licenses/by-nc/4.0/).
As the year drew to a close, it was clear that 2021 had been a transformative period for entertainment. The pandemic did not kill traditional media; it forced it to evolve. Movie theaters proved their resilience with blockbuster returns. Streaming services became not just convenient but culturally essential. Music and gaming reached new heights of engagement. And social media platforms became the global town squares where all of it was discussed, debated, and remixed.
Warner Bros. famously released its entire 2021 slate, including Dune and The Matrix Resurrections , on HBO Max the same day they hit theaters. Meanwhile, Disney used its Premier Access tier on Disney+ for films like Black Widow , sparking high-profile legal and industry debates over talent compensation and streaming residuals.
shattered box office records, becoming a rare communal event in a fragmented year. : Popular books included " The Midnight Library " by Matt Haig and the social media-fueled resurgence of " The Song of Achilles " by Madeline Miller [26]. Television: The "Quarantine Content" Peak
The year 2021 solidified streaming as the primary mode of media consumption, with the average American subscribing to . This proliferation was driven by "exclusive content wars," where platforms launched blockbuster productions directly to digital screens.
The video game industry continued its upward trajectory in 2021, fueled by ongoing pandemic-related demand. In the United States, NPD Group reported that took the top spot in dollar sales, followed by Call of Duty: Black Ops: Cold War and Madden NFL 22 . The year also saw impressive performances from Pokémon: Brilliant Diamond/Shining Pearl , Battlefield 2042 , and Resident Evil: Village , which helped the Resident Evil franchise reach an all-time annual sales high.
In 2021, the battle for consumer attention intensified as media giants deployed massive capital to expand their digital footprints. Streaming moved from a secondary viewing option to the primary engine of the entertainment industry. The Hybrid Release Experiment
If you would like to expand this article, let me know if we should focus on of the streaming wars, regional case studies like South Korea's cultural boom, or a deeper technical analysis of content delivery networks. Share public link
The return of hybrid concerts and the eventual return to theaters showed a strong demand for in-person experiences.
Video games and digital communities blurred the lines between interactive entertainment and traditional social networking. The Metaverse and Virtual Ecosystems
: The year saw the return of massive pop stars, with Adele’s "30" and Olivia Rodrigo’s "Sour" leading charts and capturing the emotional zeitgeist of a world still processing pandemic isolation [26]. Film: The Hybrid Release Experiment
TikTok solidified its status as the ultimate cultural tastemaker. The platform’s unique algorithm democratized fame, allowing independent musicians, creators, and micro-trends to dictate mainstream media. Short-form video trends directly influenced the Billboard music charts, turned older songs (like Fleetwood Mac's "Dreams") back into hits, and dictated what Gen Z and Millennial audiences bought, watched, and talked about. The Birth of "Sea Shanties" and Couch Guy
As the year drew to a close, it was clear that 2021 had been a transformative period for entertainment. The pandemic did not kill traditional media; it forced it to evolve. Movie theaters proved their resilience with blockbuster returns. Streaming services became not just convenient but culturally essential. Music and gaming reached new heights of engagement. And social media platforms became the global town squares where all of it was discussed, debated, and remixed.
Warner Bros. famously released its entire 2021 slate, including Dune and The Matrix Resurrections , on HBO Max the same day they hit theaters. Meanwhile, Disney used its Premier Access tier on Disney+ for films like Black Widow , sparking high-profile legal and industry debates over talent compensation and streaming residuals.
shattered box office records, becoming a rare communal event in a fragmented year. : Popular books included " The Midnight Library " by Matt Haig and the social media-fueled resurgence of " The Song of Achilles " by Madeline Miller [26]. Television: The "Quarantine Content" Peak putalocura240502laurababyspanishxxx720p 2021
The year 2021 solidified streaming as the primary mode of media consumption, with the average American subscribing to . This proliferation was driven by "exclusive content wars," where platforms launched blockbuster productions directly to digital screens.
The video game industry continued its upward trajectory in 2021, fueled by ongoing pandemic-related demand. In the United States, NPD Group reported that took the top spot in dollar sales, followed by Call of Duty: Black Ops: Cold War and Madden NFL 22 . The year also saw impressive performances from Pokémon: Brilliant Diamond/Shining Pearl , Battlefield 2042 , and Resident Evil: Village , which helped the Resident Evil franchise reach an all-time annual sales high. As the year drew to a close, it
In 2021, the battle for consumer attention intensified as media giants deployed massive capital to expand their digital footprints. Streaming moved from a secondary viewing option to the primary engine of the entertainment industry. The Hybrid Release Experiment
If you would like to expand this article, let me know if we should focus on of the streaming wars, regional case studies like South Korea's cultural boom, or a deeper technical analysis of content delivery networks. Share public link Streaming services became not just convenient but culturally
The return of hybrid concerts and the eventual return to theaters showed a strong demand for in-person experiences.
Video games and digital communities blurred the lines between interactive entertainment and traditional social networking. The Metaverse and Virtual Ecosystems
: The year saw the return of massive pop stars, with Adele’s "30" and Olivia Rodrigo’s "Sour" leading charts and capturing the emotional zeitgeist of a world still processing pandemic isolation [26]. Film: The Hybrid Release Experiment
TikTok solidified its status as the ultimate cultural tastemaker. The platform’s unique algorithm democratized fame, allowing independent musicians, creators, and micro-trends to dictate mainstream media. Short-form video trends directly influenced the Billboard music charts, turned older songs (like Fleetwood Mac's "Dreams") back into hits, and dictated what Gen Z and Millennial audiences bought, watched, and talked about. The Birth of "Sea Shanties" and Couch Guy