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Updated: Sep 29, 2025
Bacterial Peptide Display for the Selection of Novel Biotinylating Enzymes
Published on: October 3, 2019
A Novel Peptide as a Specific and Selective Probe for Klebsiella pneumoniae Detection
Hyun Kim1, Ju Hye Jang1, In Young Jung2
1Research Institute of Life Sciences, Gyeongsang National University, Jinju 52828, Korea.
Abstract:
Klebsiella pneumoniae is infamous for generating hospital-acquired infections, many of which are difficult to treat due to the bacterium's multidrug resistance. A sensitive and robust detection method of K. pneumoniae can help prevent a disease outbreak. Herein, we used K. pneumoniae cells as bait to screen a commercially available phage-displayed random peptide library for peptides that could be used to detect K. pneumoniae. The biopanning-derived peptide TSATKFMMNLSP, named KP peptide, displayed a high selectivity for the K. pneumoniae with low cross-reactivity to related Gram-negative bacteria. The specific interaction between KP peptide and K. pneumoniae lipopolysaccharide resulted in the peptide's selectivity against K. pneumoniae. Quantitative analysis of this interaction by enzyme-linked immunosorbent assay revealed that the KP peptide possessed higher specificity and sensitivity toward K. pneumoniae than commercially available anti-Klebsiella spp. antibodies and could detect K. pneumoniae at a detection limit of 104 CFU/mL. These results suggest that KP peptide can be a promising alternative to antibodies in developing a biosensor system for K. pneumoniae detection.
Insights
A novel peptide, KP peptide, was developed to detect multidrug-resistant Klebsiella pneumoniae (K. pneumoniae). This peptide offers a sensitive and specific alternative to antibodies for biosensor development, aiding in infection control.
Area of Science:
- Microbiology
- Biotechnology
- Analytical Chemistry
Background:
- Klebsiella pneumoniae is a significant cause of hospital-acquired infections.
- Multidrug resistance in K. pneumoniae complicates treatment and necessitates rapid detection methods.
- Current detection methods may lack the required sensitivity or specificity.
Purpose of the Study:
- To screen a phage-displayed peptide library for novel K. pneumoniae detection agents.
- To develop a sensitive and selective peptide-based detection method for K. pneumoniae.
- To evaluate the efficacy of the identified peptide against existing detection methods.
Main Methods:
- Phage display biopanning was employed to isolate K. pneumoniae-specific peptides.
- The selected peptide (KP peptide) was characterized for its binding specificity and affinity.
- Enzyme-linked immunosorbent assay (ELISA) was used for quantitative analysis and comparison with antibodies.
Main Results:
- A peptide, designated KP peptide (TSATKFMMNLSP), was identified with high selectivity for K. pneumoniae.
- KP peptide demonstrated low cross-reactivity with related Gram-negative bacteria.
- KP peptide showed superior specificity and sensitivity compared to commercial anti-Klebsiella spp. antibodies, with a detection limit of 10^4 CFU/mL.
Conclusions:
- KP peptide is a highly specific and sensitive agent for K. pneumoniae detection.
- The specific interaction between KP peptide and K. pneumoniae lipopolysaccharide underlies its selectivity.
- KP peptide represents a promising alternative to antibodies for developing K. pneumoniae biosensors.
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