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Paenibacillus assamensis sp. nov., a novel bacterium isolated from a warm spring in Assam, India

¹ Microbial Type Culture Collection and Gene Bank (MTCC), Sector 39A, Chandigarh 160 036, India
² Institute of Microbial Technology, Sector 39A, Chandigarh 160 036, India

Correspondence
T. Chakrabarti
tapan{at}imtech.res.in

A polyphasic approach was used to characterize a bacterium, GPTSA 11^T, isolated from a warm spring located in a reserve forest in Assam, India. The cells are Gram-variable, strictly aerobic, sporulating motile rods. The major fatty acids of the strain are C_{15 : 0} anteiso (48·42 %), C_{16 : 0} iso (11·59 %), C_{16 : 1}11c (6·16 %), C_{15 : 0} iso (6·03 %), C_{17 : 0} anteiso (5·68 %) and C_{16 : 1}7c alcohol (5·01 %). The presence of the fatty acid C_{16 : 1}7c alcohol distinguishes this strain from other closely related species of the genus Paenibacillus. The strain contains MK-7 as the diagnostic menaquinone. The G+C content of the genomic DNA is 41·2 mol%. Analysis of the 16S rRNA gene sequence (1466 nt) revealed the presence of signature sequences PAEN 515F (5'-GAGTAACTGCTCTCGGAATGACGGTACTTGAGAAGAAAGCCCC-3') and PAEN 862F (5'-TCGATACCCTTGGTGCCGAAGT-3'), which were found in the species of the genus Paenibacillus surveyed by Shida et al. [Shida, O., Takagi, H., Kadowaki, K., Nakamura, L. K. & Komagata, K. (1997). Int J Syst Bacteriol 47, 289–298]. The sequence shows closest similarity (95·85 %) to that of Paenibacillus apiarius, followed by Paenibacillus alvei (94·34 %), Paenibacillus cineris (93·87 %), Paenibacillus favisporus (93·80 %), Paenibacillus chibensis (93·47 %) and Paenibacillus azoreducens (93·40 %). Biochemical, physiological, chemotaxonomic and phylogenetic analyses justify placement of the strain in the genus Paenibacillus but not within any existing species. It should, therefore, be considered as representing a novel species, for which the name Paenibacillus assamensis sp. nov. is proposed. The type strain is GPTSA 11^T (=MTCC 6934^T=JCM 13186^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Paenibacillus assamensis GPTSA 11^T is AY884046.

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