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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Prepared by the Kross Digital Playground Content Team – Lisa, Anna, Ngel Dark, Charles Derakayden, and the entire Kross family.
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So, what are "family matters"? In essence, family matters refer to the issues and concerns that are relevant to family life. This can include topics such as relationships, parenting, communication, and conflict resolution. In the context of digital playgrounds, family matters take on a new dimension, as individuals navigate the challenges and opportunities presented by online interactions.
By following these tips and recommendations, families can promote healthy digital habits and ensure a safe and positive online experience.
Education and awareness are key in helping families navigate the complexities of digital media. Parents, educators, and policymakers must work together to provide guidance and resources to families, enabling them to make informed decisions about the content they access online.
The addition of "Charles Dera" to this keyword search often indicates a request for "Boy/Girl" scenes specifically. His chemistry with female stars like Kayden Kross and Lisa Ann is legendary, making his clips highly trafficked in the "free" corners of the internet. So, what are "family matters"
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The studio often offers limited free trailers, clips, or promotional access to their extensive library, ensuring high-definition quality and security Digital Playground.
Finding a balance between online and offline activities is vital for maintaining healthy family relationships. By being mindful of screen time, setting aside device-free zones, and engaging in activities together, families can promote bonding and create lasting memories. In the context of digital playgrounds, family matters
Prepared by the Kross Digital Playground Content Team – Lisa, Anna, Ngel Dark, Charles Derakayden, and the entire Kross family.
Charles looked at his brother. He wanted to ask him outright: Did you send the letter? Are you the one trying to bleed us dry? But he couldn't. Not in front of Sophie. The family image had to be maintained. The "Digital Playground" of social media and neighborhood gossip couldn't know that the Derak family was crumbling from the inside.
Given the complexities of the digital age, it's essential for families to have open and honest conversations about sensitive topics. Here are some tips for navigating these conversations: Parents, educators, and policymakers must work together to
“The Playground opens for those who remember what it means to be free.”
Since its launch, the Playground has logged , with a 96 % satisfaction rate and average session length of 22 minutes —a testament to its engaging, purposeful design.
, be cautious with free content offers, especially if they seem too good to be true. Always use reputable sites to avoid potential malware or privacy risks.