独特的编码体使用特征反映了Acinetobacter baumannii复合体中的进化和病原性适应.
Ujwal Dahal1, Anuj Sharma2, Karan Paul3
1School of Bioengineering and Biosciences, Department of Biochemistry, Lovely Professional University, Punjab, 144411, India.
概括
研究Acinetobacter中的子使用,揭示了塑造基因组多样性的进化力量. 病原性和非病原性菌株之间的代码偏差的差异可能表明病毒性因素.
科学领域:
- 微生物学和进化基因组学
- 细菌遗传学和植物遗传学
背景情况:
- 该属的Acinetobacter表现出显著的基因组和病原性多样性.
- 了解子使用模式对于破译细菌的进化压力和功能适应至关重要.
研究的目的:
- 为了研究Acinetobacter. 属中的codon使用和氨基酸偏差.
- 确定影响这些模式的进化力 (突变与选择).
- 探索对病原性和生物技术的影响.
主要方法:
- 使用标准编码子偏差指数 (GC含量,RSCU,ENC,CAI) 分析基因组数据.
- 应用中立和平价图表来评估突变和选择性压力.
- 用 gyrB 基因序列进行基因学分析,以了解进化关系.
主要成果:
- 在Acinetobacter物种中观察到一个动态的GC含量范围,其中A. baumannii复合体显示平衡的GC分布.
- 确定了富含AT的首选编码子和与GC组成的相关性,表明突变偏差和选择性压力.
- 柯登对的使用揭示了A. baumannii复合体内的功能一致性,由 gyrB 基因基因基因学支持.
结论:
- 在Acinetobacter中使用Codon是由突变和选择性力量的组合形成的,这有助于基因组和功能多样性.
- 致病性和非致病性物种之间的编码子使用差异表明潜在的病毒性基因组特征.
- 需要进一步的研究来探索与这些基因组签名相关的致病潜力.
更多相关视频
10:50Design and Use of a Low Cost, Automated Morbidostat for Adaptive Evolution of Bacteria Under Antibiotic Drug Selection
Published on: September 27, 2016
10.1K
05:06Author Spotlight: Advancing Antibiotic Resistance Research Using an Efflux-Deficient Bacterial Strain and a Single-Copy Gene Expression System
Published on: January 5, 2024
1.0K
相关概念视频
02:28Leaky Scanning
5.6K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.6K
01:18Mutations in Microorganisms
466
Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
466
03:06From DNA to Protein
21.8K
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
21.8K
02:05Gene Evolution - Fast or Slow?
7.9K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.9K
01:25The Central Dogma
138.8K
Overview
138.8K
01:16Transduction
1.1K
Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
1.1K