概括
研究人员隔离了一种玉米基因,发现了一种235氨基酸蛋白质. 序列比较确定了因重复的氨基酸序列而导致蛋白中微异质性的基础.
科学领域:
- 植物分子生物学 植物分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 齐安蛋白质是玉米 (Zea mays) 末体中主要的储存蛋白质.
- 了解基因结构对于玉米的繁殖和营养改善至关重要.
研究的目的:
- 从玉米中分离和鉴定一种编码为19,000达尔顿蛋白的基因.
- 为了研究基因家族中微异质性的分子基础.
主要方法:
- 在Charon 4A.建立一个玉米基因组图书馆.
- 使用Eco RI片段和南方杂交,对Zeen基因进行隔离.
- 基因组和cDNA克隆的核酸测序.
- 比较序列分析.比较序列分析.
主要成果:
- 一个编码19,000达尔顿蛋白的基因被分离出来.
- 该基因预测235氨基酸蛋白与21氨基酸信号并没有中间序列.
- 对比分析显示了中央区域的序列差异,归因于重复的20氨基酸基因.
- 南方杂交表明玉米基因组中有多个同源序列.
结论:
- 隔离的基因提供了对主要玉米蛋白质结构的洞察力.
- 已识别的重复序列是促进蛋白微异质性的关键因素.
- 这一发现有助于理解基因家族的进化和变异.
更多相关视频
10:08Experimental Design for Laser Microdissection RNA-Seq: Lessons from an Analysis of Maize Leaf Development
Published on: March 5, 2017
06:11Improved Methods for Preparing Transverse Sections and Unrolled Whole Mounts of Maize Leaf Primordia for Fluorescence and Confocal Imaging
Published on: September 22, 2023
相关概念视频
02:32Position-effect Variegation
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
02:54Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
01:09Epistasis Analysis
Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...