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Deinococcus pantiae sp. sp. を含む生息地について説明しています. nov.は,南極のシルマーカー・オアシスの湖から分離された紫外線耐性細菌です

Namrata Jiya¹, Wormirin Khudai¹, Bhavuk Gupta¹

¹BRIC - National Centre for Cell Science, Pune 411007, India.

International journal of systematic and evolutionary microbiology

|February 18, 2026

まとめ

新種の紫外線耐性細菌Deinococcus pantiaeが,南極の湖の堆積物の中で発見された. この赤い色素で有酸素なココイド菌株は,Deinococcus属を拡張し,独特の系統遺伝学および化学分泌学特性を有しています.

科学分野:

微生物学微生物学とは
エクストレモフィルの研究
バクテリアの分類学

背景:

南極大陸は,極端な環境に適応したユニークな微生物の棲み家です.
Deinococcus属は,放射線耐性と多様な生息地での存在で知られています.
新種のバクテリア菌株の分離は,微生物の多様性と適応を理解するために極めて重要です.

研究の目的:

南極の湖の堆積物から新しい細菌株を分離し,特徴づけること.
小説の単離物の系統遺伝学および化学分泌学特性を決定する.
Deinococcus属内の新しい種を提案する.

主な方法:

南極の湖の堆積物からSM5_A1^T菌株を分離した.
16S rRNA遺伝子配列を用いた系統遺伝分析.
分類的配置のためのゲノム関連インデックス (ANI,AAI,dDDH).
化学分量学分析:DNAのG+C含有量,呼吸器キノン,細胞脂肪酸,極性脂質.

主要な成果:

菌株SM5_A1^Tは,紫外線に耐性があり,赤色に染色され,グラム陽性で,有酸素で,動かないココイド菌である.
系統遺伝学的分析は,Deinococcus saxicola,D. frigens,D. marmoris. との密接な関係を示した.
ゲノムベースの分析により,D. marmorisが最も近い親戚であると確認され,ANI,AAI,dDDHの値は種の境界線値を下回った.
化学分量学データ (MK-8,特定の脂肪酸,および極性脂質) は,その特異性をさらに支持しました.

結論:

株SM5_A1^Tは,Deinococcus属の新種である.
この新種の提案された名称はDeinococcus pantiae.
型株はSM5_A1^T (MCC 5347^T=JCM 36669^T=KCTC 43670^T) となっている.

キーワード:

デイノコッカス (Deinococcus) とは紫外線に抵抗する.ゲノムシーケンシング極地微生物学の極地微生物学ポリエクストレモフィール (polyextremophile) とは

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