caa a22 4500 475746651 CHVBK 20180406123515.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/s002840010114 doi (NATIONALLICENCE)springer-10.1007/s002840010114 Comparison of Low-Molecular-Weight Heat Stress Proteins Encoded on Plasmids in Different Strains of Streptococcus thermophilus [Elektronische Daten] [Barbara Thurston Solow, George A. Somkuti] Streptococcus thermophilus is used extensively for industrial fermentation of dairy products. Some strains of S. thermophilus are known to carry plasmids, and many of these plasmids are suspected of encoding low-molecular-weight heat stress proteins (Hsps) that may aid in survival under stressful conditions. In order to confirm the presence and examine the similarity of these low-molecular-weight Hsps, genes were identified and sequenced encoding Hsps on plasmids pER16 (4.5 kb), pER35 (10 kb), and pER36 (3.7 kb) from three different strains of S. thermophilus. The plasmid replication proteins were also sequenced to examine their relatedness. Amino acid sequence comparisons of the Hsps and of the replication proteins revealed a high degree of identity suggesting a common origin. Heat stress proteins enhance the viability of bacteria in extreme environments, and the presence of an Hsp encoded on a plasmid may enhance survival of S. thermophilus under harsh production conditions. Springer-Verlag New York Inc., 2000 Solow Barbara Thurston Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA, US aut Somkuti George A. Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA, US aut https://doi.org/10.1007/s002840010114 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s002840010114 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Solow Barbara Thurston Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA, US aut NATIONALLICENCE 700 1- Somkuti George A. Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer