一个单一的残留开关控制了异构体选择性在菌的异构二二烯合成酶
Mohammed M A Ahmed1, Jordan Nafie2, Jeffrey D Rudolf1
1Department of Chemistry, University of Florida, Gainesville, Florida 32611-7011, United States.
Organic letters
|February 3, 2026
概括
研究人员从myxobacteria中发现了一种新的合成酶,IbdS. 这种酶产生一种独特的bonnadiene异构体,其中一个单一的氨基酸变化控制产品选择性.
科学领域:
- 自然产品化学 自然产品化学
- 酶学 是一种酶学.
- 菌的二次新陈代谢
背景情况:
- 菌类菌是不常见的,具有有限的特征合成酶.
- 类合成酶是各种类天然产品的生物合成中的关键酶.
研究的目的:
- 为了描述来自 * Polyangium aurulentum * sp. 的烯合成酶 IbdS. 在SDU3-1.
- 为了研究异构体选择性在myxobacterial合成酶的结构决定因素.
主要方法:
- 合成酶的分离和表征 IbdS.
- 酶性测定用于确定产品配置文件.
- 序列比较和局部定向的突变发生.
主要成果:
- 作为主要产品,ibdS生产了螺旋环三环波纳的Δ9,10异构体.
- 较小的产品包括欧尼塞兰和cembrenoids.
- 在IbdS中57位的单个残留开关和一个actinobacterial bonnadiene synthase控制的异构体选择性.
结论:
- 这项研究扩大了已知的myxobacterial合成酶及其产品的范围.
- 确定了一种关键的氨基酸残留物,该残留物控制了合成酶异构体的特异性.
- 提供了细菌中烯生物合成的进化和机制的见解.
相关概念视频
Constitutional Isomers of Alkanes
22.5K
Organic compounds of the same molecular formula can have different structural formulas called constitutional isomers, and the phenomenon is known as constitutional isomerism. Alkanes with four or more carbons showing multiple structures with the same molecular formula thereby exhibit constitutional isomerism.
The linear isomer of an alkane is prefixed by the term “n”; hence a linear isomer of pentane is known as n-pentane. Based on the type of branching, some of the...
The linear isomer of an alkane is prefixed by the term “n”; hence a linear isomer of pentane is known as n-pentane. Based on the type of branching, some of the...
22.5K
Residual Plots
6.5K
A residual plot is a statistical representation of data used to analyze correlation and regression results. It helps verify the requirements for drawing specific conclusions about correlation and regression. To obtain the residual plot, first, the residual for each data value is calculated, which is simply the vertical distance between the observed and the predicted value obtained from the regression equation.
When the residual values are plotted against the variable x, it is called a residual...
When the residual values are plotted against the variable x, it is called a residual...
6.5K
Residual Stresses
648
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
648
Switching of BJT
864
Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
864
ATP Synthase: Structure
15.6K
ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...
15.6K
ATP Synthase: Mechanism
17.2K
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
17.2K


