Evaluation of cell wall binding domain of Staphylococcus aureus autolysin as affinity reagent for bacteria and its application to bacterial detection

We evaluated the cell wall binding (CWB) domain of Staphylococcus aureus autolysin as an affinity reagent for bacteria. A fusion of CWB domain and green fluorescent protein (CWB-GFP) bound to S. aureus with a dissociation constant of 15 nM. CWB-GFP bound to a wide range of gram-positive bacteria, bu...

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Veröffentlicht in:Journal of bioscience and bioengineering 2007-07, Vol.104 (1), p.55-61
Hauptverfasser: Ahmed, Abo Bakr F., Noguchi, Kanako, Asami, Yasuo, Nomura, Kazutaka, Fujii, Hiroya, Sakata, Minoru, Tokita, Akihiko, Noda, Kenichi, Kuroda, Akio
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container_issue 1
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container_title Journal of bioscience and bioengineering
container_volume 104
creator Ahmed, Abo Bakr F.
Noguchi, Kanako
Asami, Yasuo
Nomura, Kazutaka
Fujii, Hiroya
Sakata, Minoru
Tokita, Akihiko
Noda, Kenichi
Kuroda, Akio
description We evaluated the cell wall binding (CWB) domain of Staphylococcus aureus autolysin as an affinity reagent for bacteria. A fusion of CWB domain and green fluorescent protein (CWB-GFP) bound to S. aureus with a dissociation constant of 15 nM. CWB-GFP bound to a wide range of gram-positive bacteria, but not to most gram-negative bacteria. We suspected that the outer membrane of gram-negative bacteria inhibits the access of CWB-GFP to peptidoglycan layer. Indeed, CWB-GFP bound to gram-negative bacteria when they were treated with benzalkonium chloride. Because CWB-GFP bound to the bacterial peptidoglycan layer, it appeared to be an effective affinity reagent for bacteria and CWB fusion with reporter proteins could be applied to detect bacteria. We also constructed a fusion of CWB and luciferase, which can be used for the rapid detection of bacteria.
doi_str_mv 10.1263/jbb.104.55
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ispartof Journal of bioscience and bioengineering, 2007-07, Vol.104 (1), p.55-61
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subjects affinity reagent
Bacteria - chemistry
Bacteria - isolation & purification
BACTERIA GRAM NEGATIVA
BACTERIA GRAM POSITIVA
bacterial probe
BACTERIE GRAM NEGATIF
BACTERIE GRAM POSITIF
Bacteriological Techniques - methods
BINDING PROTEINS
Biological and medical sciences
Biotechnology
Cell Wall - chemistry
cell wall binding
CELL WALLS
Fundamental and applied biological sciences. Psychology
GRAM NEGATIVE BACTERIA
GRAM POSITIVE BACTERIA
Green Fluorescent Proteins - analysis
Green Fluorescent Proteins - genetics
Lactobacillus - chemistry
Lactobacillus - isolation & purification
Luciferases - analysis
Luciferases - genetics
microbe counting
N-Acetylmuramoyl-L-alanine Amidase - analysis
N-Acetylmuramoyl-L-alanine Amidase - chemistry
N-Acetylmuramoyl-L-alanine Amidase - genetics
PARED CELULAR
PAROI CELLULAIRE
Protein Structure, Tertiary
PROTEINAS AGLUTINANTES
PROTEINE DE LIAISON
Recombinant Fusion Proteins - analysis
Recombinant Fusion Proteins - chemistry
Recombinant Fusion Proteins - genetics
Spores, Bacterial - chemistry
Spores, Bacterial - isolation & purification
STAPHYLOCOCCUS AUREUS
Staphylococcus aureus - enzymology
title Evaluation of cell wall binding domain of Staphylococcus aureus autolysin as affinity reagent for bacteria and its application to bacterial detection
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