巨大海洋ポリエーテル毒素の生物合成における巨大ポリケチド合成酵素
Timothy R Fallon1, Vikram V Shende1, Igor H Wierzbicki2
1Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography and University of California, San Diego, La Jolla, CA 92093, USA.
Science (New York, N.Y.)
|August 8, 2024
まとめ
研究者達は 有害な藻類のプリムネシウム・パルブムで "PKZILLAs" と称される大規模なポリケチド合成酵素 (PKS) 遺伝子を発見した. この遺伝子はプリムネシン毒素の 複雑な生物合成を説明し 40年前の謎を解いたのです
科学分野:
- 海洋生物学
- 生物化学
- 遺伝学
背景:
- プリムネシウムパルバムは 有害なハプトファイト藻で 魚の大量死の原因です
- 生成される毒素であるプリムネシンは 大量のポリケチドポリエーテル化合物で 生物合成経路は40年以上も不明でした
研究 の 目的:
- プリムネシウムパルブムのプリムネシン生物合成を担当する遺伝子を特定する.
- プリムネシン毒素の 生成起源を解明する
主な方法:
- 新しいポリケチド合成酵素 (PKS) 遺伝子を特定するためのバイオ情報分析.
- タンパク質製品とその酵素ドメインの遺伝子特徴と予測.
- 予測された製品と既知のプリムネシン構造の比較
主要な成果:
- "PKZILLAs" (PKZILLA-1,PKZILLA-2,PKZILLA-B1) と呼ばれる大規模なPKS遺伝子の発見
- PKZILLA-1と2は,多数の酵素ドメインを持つ巨大タンパク質 (4. 7と3.2メガダルトン) をコードする.
- 予測された製品は,A型とB型プリムネシンの前駆体と一致し,生物合成モデルを確立しています.
結論:
- PKZILLA遺伝子は,Prymnesium parvumにおけるプリムネシンの生物合成に責任があります.
- この研究は,ハプトファイトポリエーテル生物合成の一般的なモデルを提供します.
- この発見は生物学的システムにおける 遺伝的および酵素的なサイズ制限に関する 現在の理解に挑戦しています
さらに関連する動画
09:10Synthesis of Masarimycin, a Small Molecule Inhibitor of Gram-Positive Bacterial Growth
Published on: January 7, 2022
2.3K
10:41The Logic, Experimental Steps, and Potential of Heterologous Natural Product Biosynthesis Featuring the Complex Antibiotic Erythromycin A Produced Through E. coli
Published on: January 13, 2013
18.5K
関連する概念動画
01:27Protein Import into the Peroxisomes
3.4K
Cells contain membrane-bound organelles called peroxisomes that oxidize organic molecules by transferring hydrogen atoms to oxygen, producing hydrogen peroxide. Peroxisomes enzymatically convert the released hydrogen peroxide into water and oxygen.
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...
3.4K
01:20Types of Step-Growth Polymers: Polyesters
2.2K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.2K
01:28ATP and Macromolecule Synthesis
5.4K
Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
5.4K
01:19Allosteric Proteins-ATCase
5.7K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
5.7K
02:35Free-Radical Chain Reaction and Polymerization of Alkenes
7.8K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
7.8K
02:34Polymers
35.6K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
35.6K