絞り込み

16645

広告

【動画】「cough medicine」を説明してみよう (日経BP)

診察室やカンファレンスなどでよく使う医療英語のエッセンスを、今日も楽しく学んでいきましょう。 今日のレッスンも「説明力トレーニング」です。「この薬って何ですか?...

  1. 入学定員減は 医学生の学力低下が背景に?...
  2. 心電図の新たな名著になるかもしれない書籍...
  3. マスクが足りない!医療機関でも深刻な事態...
  4. 新型コロナウイルス対応まっただ中の保健所...

ニュース一覧

Global cellulose biomass, horizontal gene transfers and domain fusions drive microbial expansin evolution.

著者 Chase WR , Zhaxybayeva O , Rocha J , Cosgrove DJ , Shapiro LR
New Phytol.2020 Jan 13 ; ():.
この記事をPubMed上で見るPubMedで表示
この記事をGoogle翻訳上で見る Google翻訳で開く

スターを付ける スターを付ける     (4view , 0users)

Full Text Sources

•Plants must rearrange the network of complex carbohydrates in their cell walls during normal growth and development. To accomplish this, all plants depend on proteins called expansins that non-enzymatically loosen noncovalent bonding between cellulose microfibrils. •Surprisingly, expansin genes have more recently been found in some bacteria and microbial eukaryotes, where their biological functions are largely unknown. •Here, we reconstruct a comprehensive phylogeny of microbial expansin genes. We find these genes in all eukaryotic microorganisms that have structural cell wall cellulose, suggesting expansins evolved in ancient marine microorganisms long before the evolution of land plants. We also find expansins in an unexpectedly high diversity of bacteria and fungi that do not have cellulosic cell walls. These bacteria and fungi inhabit varied ecological contexts mirroring the diversity of terrestrial and aquatic niches where plant and/or algal cellulosic cell walls are present. •The microbial expansin phylogeny shows evidence of multiple horizontal gene transfer events within and between bacterial and eukaryotic microbial lineages, which may in part underlie their unusually broad phylogenetic distribution. Overall, expansins are unexpectedly widespread in bacteria and eukaryotes, and the contribution of these genes to microbial ecological interactions with plants and algae has likely been underappreciated.
PMID: 31930503 [PubMed - as supplied by publisher]
印刷用ページを開く Endnote用テキストダウンロード