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/).
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For advanced users on desktop, modifying highscores.lua or settings.lua via the DebugConsole can unlock everything.
: Success often hinges on using the right bird for the right material. For example, Chuck (the yellow bird) is the fastest and is specifically designed to smash through wood efficiently.
user wants a long article for the keyword "Angry Birds Classic Qa Cheats". This likely refers to cheats, tips, and tricks for the classic Angry Birds game, possibly including "Qa" which might be a typo or abbreviation. I need to search for relevant information. I'll search for general cheats, tips, and strategies for Angry Birds Classic. I'll also search for "Angry Birds Classic Qa" to see if it's a specific term. I'll use search queries accordingly. search results show various sources for cheats, tips, and strategies. I'll open some of the most relevant-looking pages to gather detailed information. search results provide a good amount of information. I'll also search for "Angry Birds Classic cheat codes" and "Angry Birds classic power ups" to get more details.'ll gather information from various sources to create a comprehensive guide. I'll structure the article with an introduction, sections on bird by bird strategies, slingshot mastery, cheats and glitches, golden eggs, three-star scoring, power-ups, and resources. I'll cite the relevant sources. Now I'll start writing the article. is a comprehensive guide and set of tips, tricks, and "cheats" for Angry Birds Classic .
This was originally likely a QA tool used by developers to jump to the end of the game to test high-level functions without playing through every stage. It was left in the PC port accidentally, allowing players to skip difficult levels entirely.
The "QA Cheats" in refer to a hidden developer or "Quality Assurance" menu used by Rovio developers during testing. This menu allows for instant level completion, power-up generation, and bypassing standard game progression. 1. How to Access the QA Menu
flag displays hidden level and particle editors directly on the main menu. Infinite Power-ups
In the early days of mobile gaming, security protocols were less stringent. Dedicated fans and modders discovered ways to force the retail version of the game to display these hidden developer tools. 1. The Lua Script Exploits
: This allows you to "watch" advertisements while offline, tricking the game into giving you the associated rewards without actually seeing the ad.