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/).
The "Angry Neighbor: Hello from Home 03 APK" community is surprisingly active, with players sharing tips, strategies, and experiences online. Forums, social media groups, and YouTube channels dedicated to the game have sprung up, providing a space for players to connect and discuss their progress.
Leo chuckled, tapping the joystick to sneak across the lawn. He reached the Neighbor's window and peered inside. Usually, the AI neighbor followed a predictable loop—kitchen, basement, sleep. But this time, the house was empty. Just a single, rotary phone ringing on a dusty table.
Invictus Studio (Original parody version) / Inspired sequels by Lazy Astronaut First-Person Stealth / Puzzle / Horror Core Objective
You must collect specific keys, cut power lines, or use objects as steps to reach high open windows.
Angry Neighbor Hello from home 03 APK represents an interesting piece of mobile gaming history—a fan-made or indie take on the popular Hello Neighbor concept, with its own unique features and a dedicated version 3.0 update. The game's concept of a tense, stealth-based puzzle solver with a learning AI opponent is genuinely engaging.
Hello Angry Neighbor Stories 3 is a dynamic, high-stakes stealth puzzle game 1.2.1 . While earlier versions focused on a single house, this installment takes the insanity to a new level. The "03" or "Stories 3" entry presents a revamped, expansive environment where the neighbor has turned his property into a labyrinthine fortress of secrets 1.2.1.
A meticulous feature article focused on the mobile game mod/APK titled "Angry Neighbor: Hello From Home 03". Covers background, gameplay, features of this specific APK release, installation and safety considerations, community response, legal/ethical notes, and recommendations.
Sneak through the fog or use the sound of thunder to mask your footsteps as you explore, adding a layer of environmental strategy 1.2.4.
The game is available for download as an APK file, which allows players to install it on their Android devices without going through the Google Play Store. This has contributed to its widespread popularity, as players can access the game from a variety of sources.
First, to understand "03 APK," you have to understand the game itself.
The Hello From Home 03 APK for Angry Neighbor delivers a fresh chapter of stealth-horror antics with updated levels, themed assets, and quality-of-life tweaks. This feature examines what’s changed, how to install the APK responsibly, community reaction, and the legal and security implications.
The game features vibrant colors and quality 3D graphics, optimized to run smoothly on various mobile devices 1.2.2 . Gameplay Mechanics: How to Survive
The represents an early Alpha phase of the project's development lifecycle. While newer versions (such as Version 3.2) feature cleaner textures and more complex maps, gamers seek out the 0.3 build for several distinct reasons:
Speedrunners and casual players often prefer version 0.3 because certain fun physics glitches have not yet been patched out.
The "Angry Neighbor: Hello from Home 03 APK" community is surprisingly active, with players sharing tips, strategies, and experiences online. Forums, social media groups, and YouTube channels dedicated to the game have sprung up, providing a space for players to connect and discuss their progress.
Leo chuckled, tapping the joystick to sneak across the lawn. He reached the Neighbor's window and peered inside. Usually, the AI neighbor followed a predictable loop—kitchen, basement, sleep. But this time, the house was empty. Just a single, rotary phone ringing on a dusty table.
Invictus Studio (Original parody version) / Inspired sequels by Lazy Astronaut First-Person Stealth / Puzzle / Horror Core Objective
You must collect specific keys, cut power lines, or use objects as steps to reach high open windows. angry neighbor hello from home 03 apk
Angry Neighbor Hello from home 03 APK represents an interesting piece of mobile gaming history—a fan-made or indie take on the popular Hello Neighbor concept, with its own unique features and a dedicated version 3.0 update. The game's concept of a tense, stealth-based puzzle solver with a learning AI opponent is genuinely engaging.
Hello Angry Neighbor Stories 3 is a dynamic, high-stakes stealth puzzle game 1.2.1 . While earlier versions focused on a single house, this installment takes the insanity to a new level. The "03" or "Stories 3" entry presents a revamped, expansive environment where the neighbor has turned his property into a labyrinthine fortress of secrets 1.2.1.
A meticulous feature article focused on the mobile game mod/APK titled "Angry Neighbor: Hello From Home 03". Covers background, gameplay, features of this specific APK release, installation and safety considerations, community response, legal/ethical notes, and recommendations. The "Angry Neighbor: Hello from Home 03 APK"
Sneak through the fog or use the sound of thunder to mask your footsteps as you explore, adding a layer of environmental strategy 1.2.4.
The game is available for download as an APK file, which allows players to install it on their Android devices without going through the Google Play Store. This has contributed to its widespread popularity, as players can access the game from a variety of sources.
First, to understand "03 APK," you have to understand the game itself. He reached the Neighbor's window and peered inside
The Hello From Home 03 APK for Angry Neighbor delivers a fresh chapter of stealth-horror antics with updated levels, themed assets, and quality-of-life tweaks. This feature examines what’s changed, how to install the APK responsibly, community reaction, and the legal and security implications.
The game features vibrant colors and quality 3D graphics, optimized to run smoothly on various mobile devices 1.2.2 . Gameplay Mechanics: How to Survive
The represents an early Alpha phase of the project's development lifecycle. While newer versions (such as Version 3.2) feature cleaner textures and more complex maps, gamers seek out the 0.3 build for several distinct reasons:
Speedrunners and casual players often prefer version 0.3 because certain fun physics glitches have not yet been patched out.