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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+-------------------+-----------------------------+------------------------------------+ | Platform | Best Known For | Key Advantage | +-------------------+-----------------------------+------------------------------------+ | Netflix | Global originals & series | Ad-free, multi-device syncing | | Amazon Prime | Regional Indian cinema | Included with Prime shipping | | Disney+ Hotstar | Live sports & Marvel/Disney | Massive library of local dubs | | Zee5 / SonyLIV | Indian TV shows & drama | Affordable regional language packs | +-------------------+-----------------------------+------------------------------------+
: Browse curated lists of top-rated films like The Dark Knight or Terminator 2 to find high-quality recommendations. MovieRulz - App Store - Apple
The phrase is a misconception driven by the temporary convenience of centralized, free content. However, when factoring in device vulnerability, frustrating ad-loops, legal liabilities, and inferior streaming bitrates, unauthorized networks cannot compete with legitimate systems. For a seamless, safe, and high-fidelity home theater experience, sticking to authorized streaming channels remains the definitive choice. movierlzhd better
Accessing copyrighted content through unauthorized channels is illegal in many jurisdictions and can lead to penalties from Internet Service Providers (ISPs).
100% legal; directly compensates creators, actors, and production crews. Security Risks Hidden Behind Free Streams
While the price (free) and convenience are attractive, using Movierulz HD involves serious risks that often make legitimate platforms a much "better" choice in the long run. 1. Cybersecurity Threats | Feature | Movierulz (Pirate Site) | Legal
For the best visual quality (4K/HDR) and reliability, mainstream platforms are the gold standard.
Platforms like Movierulz HD are not official streaming services. They are that illegally host and distribute copyrighted movies and TV shows without any licensing agreements. They often resurface under a network of constantly changing mirror domains (like .pro, .sbs, .guru, .live, etc.) to evade legal blocks and shutdowns.
: Accessing or promoting pirated content violates copyright laws in many regions, including India, which can lead to legal and financial penalties. For a seamless, safe, and high-fidelity home theater
Legitimate streaming sites rarely ask you to download .exe or .zip files to "play" a movie. Poor Language and Layout: Official sites like
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