Complete genome sequence of a Methylomonas sp. nov. 2F7 isolated from rice paddy soil in South Korea

This Data Note reports the complete genome sequence and associated functional-genomic data of Methylomonas sp. strain 2F7, a methane-oxidizing bacterium isolated from rice paddy soil in South Korea. These data were generated to support comparative genomic analyses of methanotrophic bacteria and to document the genome-based taxonomic position and C1 metabolism gene repertoire of strain 2F7.

The dataset includes Oxford Nanopore Technologies MinION raw reads, a two-replicon genome assembly, annotation summaries, functional classifications, a phylogenetic analysis, average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) comparisons, and a curated C1 metabolism gene table. The genome consists of a 4,979,984-bp chromosome and a 23,603-bp plasmid, with an overall G+C content of 51.4%. Annotation identified 4,520 genes, including 4,429 coding sequences (CDSs), nine rRNA genes, 46 tRNA genes, and four ncRNAs. The 16S rRNA gene sequence showed the highest similarity to Methylomonas fluvii EbBᵀ, whereas ANI/dDDH analysis identified Methylomonas rosea WSC-7ᵀ as the closest related type strain by genome-distance criteria, with ANI/dDDH values of 89.6% and 38.0%, respectively. Additional ANI/dDDH comparisons with M. fluvii EbBᵀ and M. defluvii OY6ᵀ yielded values of 89.3%/37.4% and 89.4%/36.9%, respectively. These genome-based values fall below accepted species-boundary thresholds and support placement of strain 2F7 as a putative novel species within the genus Methylomonas. The curated gene table documents pMMO-like and sMMO gene clusters and genes involved in methanol oxidation, formaldehyde oxidation, and ribulose monophosphate (RuMP)-linked C1 assimilation.