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/).
A "MOD" (modified) version of a game is an altered APK (Android) or IPA (iOS) file created by third-party developers. A "MOD VIP" typically offers features that would cost real money or require extensive gameplay. For Stick War: Legacy , a MOD VIP IPA for iOS is designed to provide significant gameplay advantages.
Downloading third-party modifications on iOS requires careful attention to security. Official applications belong on the Apple App Store . Modified application files (IPA packages) require specific steps to ensure device safety: Avoid System Jailbreaks
Go to Settings > General > VPN & Device Management, find the enterprise certificate, and select "Trust." Launch the game from your home screen. Strategic Tips for VIP Gameplay
To get the highest-quality version of Stick War: Legacy on iOS:
Before diving into modifications, it's important to understand the core game. Stick War: Legacy , developed by Max Games Studios, is a game where you control an army of stick figure warriors. The goal is simple: destroy the enemy's statue while defending your own. You command miners to gather gold, train units like Swordwrath, Archidons (archers), Magikill (mages), and the mighty Giant, and seize control of territories.
Often includes a "Mod Menu" to toggle features like instant build or god mode during active battles. Google Play How to Install Mod IPA on iOS (No Jailbreak)
High-quality mods do not require you to fill out surveys or download other apps to unlock content. If a site asks for this, it is likely fraudulent.
Enter your Apple ID and password (an app-specific password is recommended for security). Click to sign and install the app onto your phone.
A "MOD" (modified) version of a game is an altered APK (Android) or IPA (iOS) file created by third-party developers. A "MOD VIP" typically offers features that would cost real money or require extensive gameplay. For Stick War: Legacy , a MOD VIP IPA for iOS is designed to provide significant gameplay advantages.
Downloading third-party modifications on iOS requires careful attention to security. Official applications belong on the Apple App Store . Modified application files (IPA packages) require specific steps to ensure device safety: Avoid System Jailbreaks
Go to Settings > General > VPN & Device Management, find the enterprise certificate, and select "Trust." Launch the game from your home screen. Strategic Tips for VIP Gameplay
To get the highest-quality version of Stick War: Legacy on iOS:
Before diving into modifications, it's important to understand the core game. Stick War: Legacy , developed by Max Games Studios, is a game where you control an army of stick figure warriors. The goal is simple: destroy the enemy's statue while defending your own. You command miners to gather gold, train units like Swordwrath, Archidons (archers), Magikill (mages), and the mighty Giant, and seize control of territories.
Often includes a "Mod Menu" to toggle features like instant build or god mode during active battles. Google Play How to Install Mod IPA on iOS (No Jailbreak)
High-quality mods do not require you to fill out surveys or download other apps to unlock content. If a site asks for this, it is likely fraudulent.
Enter your Apple ID and password (an app-specific password is recommended for security). Click to sign and install the app onto your phone.