Methylocystis suflitae sp. nov., a novel type II methanotrophic bacterium isolated from landfill cover soil

• Published in: International journal of systematic and evolutionary microbiology Vol. 74; no. 1
• Main Authors: Garner, Christopher T, Sankaranarayanan, Krithivasan, Abin, Christopher A, Garner, Rosa M, Cai, Haiyuan, Lawson, Paul A, Krumholz, Lee R
• Format: Journal Article
• Language: English
• Published: England 01-01-2024
• Subjects: Bacteria; Bacterial Typing Techniques; Base Composition; DNA, Bacterial - genetics; Fatty Acids - chemistry; Methane; Methylocystaceae - genetics; Phylogeny; RNA, Ribosomal, 16S - genetics; Sequence Analysis, DNA; methanotroph; methylocystis; methanotroph genomics; landfill
• DOI: 10.1099/ijsem.0.006239
• EISSN: 1466-5034

A bacterial strain, designated NLS-7
, was isolated through enrichment of landfill cover soil in methane-oxidizing conditions. Strain NLS-7
is a Gram-stain negative, non-motile rod, approximately 0.8 µm wide by 1.3 µm long. Phylogenetic analysis based on 16S rRNA gene sequencing places it within the genus
, with its closest relatives being
,
and
, with 99.9, 99.7 and 99.6 % sequence similarity respectively. However, average nucleotide identity and average amino acid identity values below the 95 % threshold compared to all the close relatives and digital DNA-DNA hybridization values between 20.9 and 54.1 % demonstrate that strain NLS-7
represents a novel species. Genome sequencing generated 4.31 million reads and genome assembly resulted in the generation of 244 contigs with a total assembly length of 3 820 957 bp (N50, 37 735 bp; L50, 34). Genome completeness is 99.5 % with 3.98 % contamination. It is capable of growth on methane and methanol. It grows optimally at 30 °C between pH 6.5 and 7.0. Strain NLS-7
is capable of atmospheric dinitrogen fixation and can use ammonium (as NH
Cl), l-aspartate, l-arginine, yeast extract, nitrate, l-leucine, l-proline, l-methionine, l-lysine and l-alanine as nitrogen sources. The major fatty acids are C
ω8
and C
ω7
. Based upon this polyphasic taxonomic study, strain NLS-7
represents a novel species of the genus
, for which the name
sp. nov. is proposed. The type strain is NLS-7
(=ATCC TSD-256
=DSM 112294
). The 16S rRNA gene and genome sequences of strain NLS-7
have been deposited in GenBank under accession numbers ON715489 and GCA_024448135.1, respectively.