同源重组和特定地点重组之间的差异|比较类似术语之间的差异

同源重组和特异性重组之间的关键区别在于，在同源重组中，遗传物质是在两个相同的双链或单链核酸的相同分子之间交换的DNA或RNA, whereas in site-specific recombination, DNA strand exchange takes place between DNA segments that possess at least a certain degree of sequence homology but no extensive homology.

重组是DNA碎片破碎和重组以产生等位基因组合的过程。这个过程在不同生物体之间创造了遗传多样性。它也称为遗传改组。它被定义为在不同生物体之间发生遗传物质交换的过程，以产生与等位基因的新组合的后代，这与两位父母中发现的等位基因不同。同源重组和特定地点重组是两种类型的重组机制。

1。概述和关键差异
2。什么是同源重组
3。什么是特定地点的重组
4。相似性 - 同源和特定地点重组
5.Homologous Recombination vs Site-Specific Recombination in Tabular Form
6.比较摘要

什么是同源重组?

同源重组是一种遗传重组，其中在两个相似（相同的）分子之间交换了双链或单链核酸（DNA或RNA）。它被细胞广泛用于修复两种DNA链中发生的有害断裂，称为双链断裂（DSB）。这个过程称为同源重组修复（HRR）。此外，真核生物中的同源重组在减数分裂过程中产生DNA序列的新组合。减数分裂是真核生物制作配子的过程例如精子和卵细胞。

Figure 01: Homologous Recombination

同源重组机制

在减数分裂期间，来自男性和女性父母对齐的成对染色体，使得配对染色体的类似DNA序列有机会彼此跨越。跨越了遗传材料的改装。同源重组是借助蛋白质，例如PRDM9，SPO11，DMC1，ZCWPW1，RPA，DNA2，BLM，CTIP，CTIP，BRCA1，BRCA2等。这些新的DNA或等位基因的新组合会在外源中产生遗传变异。它使人们能够在进化过程中适应。

Homologous recombination is also used by bacteria and viruses. This is called “水平基因转移”，该过程在不同菌株和物种之间交换遗传物质细菌和病毒。

什么是特定地点的重组?

Site-specific recombination is a type of genetic recombination in which DNA strand exchange takes place between DNA segments possessing at least a certain degree of sequence homology but no extensive homology. It occurs in bacterial genome replication, differentiation pathogenesis, and movement of mobile genetic element.

Site-specific Recombination Mechanism

酶被称为因地制宜recombinases (SSRs) are involved in this process. They recognize and bind to short and specific DNA sequences. Then they cleave the DNA backbone and exchange the two DNA helices involved. Ultimately, these enzymes re-join the DNA strands.

图02：特定地点重组

In most cases, the presence of a recombinase enzyme and recombination sites are sufficient for this process. But in some cases, a number of accessory proteins or accessory sites are required. Site-specific recombination systems are highly specific, fast, and efficient. Therefore, they are potential tools for genetic engineering.

What are the Similarities Between Homologous Recombination and Site-Specific Recombination?

它们是重组机制的类型。
它们增强了不同生物体之间的遗传变异。
Both processes occur between DNA.
他们使用特定的蛋白质进行重组机制。
Both take place in prokaryotes as well as in eukaryotes.

What is the Difference Between Homologous Recombination and Site-Specific Recombination?

同源重组是一种遗传重组，其中在两个相同的双链或单链核酸（例如DNA或RNA）之间交换了遗传材料。另一方面，位点特异性的重组是一种遗传重组，其中DNA链交换在具有至少一定程度的序列同源但没有广泛同源性的DNA片段之间进行。因此，这是同源重组和特定地点重组之间的关键区别。此外，长DNA链之间发生同源重组。相反，短DNA序列之间发生位点特异性重组。因此，这是同源重组和特定地点重组之间的另一个重要差异。

以下是表格形式的同源重组和特定于位点的重组之间的差异列表。

比较摘要 - 同源与特定地点重组

Genetic recombination involves the exchange of genetic material either between multiple chromosomes or between different regions of the same chromosome. Homologous recombination and site-specific recombination are two types of recombination mechanisms. Homologous recombination occurs between DNA with extensive sequence homology. Site-specific recombination occurs between DNA with no extensive homology. Thus, this summarizes the difference between homologous recombination and site-specific recombination.