Staphylococcal Phage 2638A endolysin is lytic for Staphylococcus aureus and harbors an inter-lytic-domain secondary translational start site
| Autor: | David M. Donovan, Mathias Schmelcher, Nina A. Shishkova, Pavel Kopylov, Igor Abaev, Olga Korobova, N. V. Kiseleva, Sergey Pryamchuk, Juli Foster-Frey, Stephen C. Becker |
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| Rok vydání: | 2012 |
| Předmět: |
Staphylococcus aureus
DNA Mutational Analysis Molecular Sequence Data Lysin Codon Initiator Biology medicine.disease_cause Applied Microbiology and Biotechnology Article Amidase Microbiology Bacteriophage chemistry.chemical_compound Protein structure Endopeptidases medicine Amino Acid Sequence Peptide Chain Initiation Translational Peptide sequence Sequence Deletion Base Sequence General Medicine biology.organism_classification Protein Structure Tertiary chemistry Biochemistry Lytic cycle Peptidoglycan Staphylococcus Phages Biotechnology |
| Zdroj: | Applied Microbiology and Biotechnology. 97:3449-3456 |
| ISSN: | 1432-0614 0175-7598 |
| DOI: | 10.1007/s00253-012-4252-4 |
| Popis: | Staphylococcus aureus is a notorious pathogen highly successful at developing resistance to virtually all antibiotics to which it is exposed. Staphylococcal phage 2638A endolysin is a peptidoglycan hydrolase that is lytic for S. aureus when exposed externally, making it a new candidate antimicrobial. It shares a common protein organization with more than 40 other reported staphylococcal peptidoglycan hydrolases. There is an N-terminal M23 peptidase domain, a mid-protein amidase 2 domain (N-acetylmuramoyl-L-alanine amidase), and a C-terminal SH3b cell wall-binding domain. It is the first phage endolysin reported with a secondary translational start site in the inter-lytic-domain region between the peptidase and amidase domains. Deletion analysis indicates that the amidase domain confers most of the lytic activity and requires the full SH3b domain for maximal activity. Although it is common for one domain to demonstrate a dominant activity over the other, the 2638A endolysin is the first in this class of proteins to have a high-activity amidase domain (dominant over the N-terminal peptidase domain). The high activity amidase domain is an important finding in the quest for high-activity staphylolytic domains targeting novel peptidoglycan bonds. |
| Databáze: | OpenAIRE |
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