- International Journal of Systematic and Evolutionary Microbiology
- Volume 33, Issue 4
f Transfer of Peptococcus indolicus, Peptococcus asaccharolyticus, Peptococcus prevotii, and Peptococcus magnus to the Genus Peptostreptococcus and Proposal of Peptostreptococcus tetradius sp. nov.
- Authors: TAKAYUKI EZAKI, NAOKI YAMAMOTO, KEIU NINOMIYA, SHOICHIRO SUZUKI, EIKO YABUUCHI
- Int J Syst Evol Microbiol, October 1983 33: 683-698, doi: 10.1099/00207713-33-4-683
- Subject: Original Papers Relating To Systematic Bacteriology
- Published Online:
The guanine-plus-cytosine (G+C) contents of the deoxyribonucleic acids (DNAs) of Peptococcus asaccharolyticus ATCC 14963T (T = type strain), Peptococcus indolicus ATCC 29427T, Peptococcus prevotii ATCC 9321T, and Peptococcus magnus ATCC 15794T ranged from 29 to 34 mol%, whereas the G+C content of the DNA of Peptococcus niger ATCC 27731T, the type species of the genus Peptococcus, is 51 mol%. The G+C content of the DNA of Peptostreptococcus anaerobius ATCC 27337T, the type species of the genus Peptostreptococcus, was 33 mol%. Thus, the DNA base compositions of Peptococcus asaccharolyticus, Peptococcus indolicus, Peptococcus prevotii, and Peptococcus magnus resemble the DNA base composition of the type species of the genus Peptostreptococcus rather than the DNA base composition of the type species of the genus Peptococcus. It is not desirable for the genus Peptococcus to include any species whose G+C content is far from the G+C content of the type species of the genus. The levels of DNA-DNA homology between Peptostreptococcus anaerobius ATCC 27337T and the four species of Peptococcus with low G+C DNA contents ranged from 23 to 36%. The cellular fatty acid profiles of Peptococcus asaccharolyticus, Peptococcus indolicus, Peptococcus prevotii, and Peptococcus magnus also resembled the cellular fatty acid profile of the type species of Peptostreptococcus. Other biochemical characteristics of these species revealed their close resemblance to Peptostreptococcus anaerobius. For these reasons we propose transfer of the four Peptococcus species that have low G+C contents to the genus Peptostreptococcus as Peptostreptococcus asaccharolyticus (Distaso 1912) comb. nov., Peptostreptococcus indolicus (Christiansen 1934) comb. nov., Peptostreptococcus prevotii (Foubert and Douglas 1948) comb. nov., and Peptostreptococcus mangus (Prévot 1933) Smith 1957 comb. rev. A group of organisms previously referred to as “Gaffkya anaerobia” (Choukévitch) Prévot is an identifiable Peptostreptococcus species based on phenotypic and genotypic characteristics. The name of Peptostreptococcus tetradius sp. nov. is proposed for this group of organisms. Strain GIFU 7672 (= ATCC 35098) is designated the type strain. Clinical strains of P. asaccharolyticus that were identified by conventional methods were divided into two homology groups and one unclassified group (A-1). DNA-DNA homology between the type strain of P. prevotii and clinical strains which had been received as P. prevotii ranged from O to 73%.
Copyright © 1983 International Union of Microbiological Societies | Published by the International Union of Microbiological Societies
Full text loading...
Author and Article Information
/content/journal/ijsem/10.1099/00207713-33-4-683dcterms_title,dcterms_subject,pub_serialTitlepub_serialIdent:journal/ijsem AND -contentType:BlogPost64
/content/journal/ijsem/10.1099/00207713-33-4-683dcterms_title,dcterms_subject-pub_serialIdent:journal/ijsem AND -contentType:BlogPost64
Figure data loading....