Genomic loss of the HSP70cA gene in the vertebrate lineage.

IF 3.3 3区 生物学 Q3 CELL BIOLOGY
Cell Stress & Chaperones Pub Date : 2023-11-01 Epub Date: 2023-08-17 DOI:10.1007/s12192-023-01370-9
Alisha Merchant, Bradly I Ramirez, Melinda N Reyes, Dysocheata Van, Marilin Martinez-Colin, Damilola O Ojo, Esmeralda L Mazuca, Heidi J De La O, Abigayle M Glenn, Claudia G Lira, Hashimul Ehsan, Ermeng Yu, Gen Kaneko
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引用次数: 0

Abstract

Metazoan 70 kDa heat shock protein (HSP70) genes have been classified into four lineages: cytosolic A (HSP70cA), cytosolic B (HSP70cB), endoplasmic reticulum (HSP70er), and mitochondria (HSP70m). Because previous studies have identified no HSP70cA genes in vertebrates, we hypothesized that this gene was lost on the evolutionary path to vertebrates. To test this hypothesis, the present study conducted a comprehensive database search followed by phylogenetic and synteny analyses. HSP70cA genes were found in invertebrates and in two of the three subphyla of Chordata, Cephalochordata (lancelets) and Tunicata (tunicates). However, no HSP70cA gene was found in the genomes of Craniata (another subphylum of Chordata; lamprey, hagfish, elephant shark, and coelacanth), suggesting the loss of the HSP70cA gene in the early period of vertebrate evolution. Synteny analysis using available genomic resources indicated that the synteny around the HSP70 genes was generally conserved between tunicates but was largely different between tunicates and lamprey. These results suggest the presence of dynamic chromosomal rearrangement in early vertebrates that possibly caused the loss of the HSP70cA gene in the vertebrate lineage.

Abstract Image

脊椎动物中 HSP70cA 基因的基因组缺失。
元古脊椎动物的 70 kDa 热休克蛋白(HSP70)基因被分为四系:细胞质 A(HSP70cA)、细胞质 B(HSP70cB)、内质网(HSP70er)和线粒体(HSP70m)。由于之前的研究在脊椎动物中没有发现 HSP70cA 基因,我们假设该基因在脊椎动物的进化过程中丢失了。为了验证这一假设,本研究进行了全面的数据库搜索,然后进行了系统发育和同源关系分析。在无脊椎动物以及脊索动物三个亚门中的两个亚门--头索类(Cephalochordata)和鳞鳃纲(Tunicata)--中发现了 HSP70cA 基因。然而,在颅骨动物(脊索动物的另一个亚门;灯鱼、长尾鳕、象鲨和腔棘鱼)的基因组中没有发现 HSP70cA 基因,这表明在脊椎动物进化的早期,HSP70cA 基因已经消失。利用现有基因组资源进行的合成分析表明,HSP70基因周围的合成在鳞翅目动物之间基本保持不变,但在鳞翅目动物和灯鱼之间则有很大差异。这些结果表明,在早期脊椎动物中存在动态染色体重排,可能导致脊椎动物系中 HSP70cA 基因的缺失。
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来源期刊
Cell Stress & Chaperones
Cell Stress & Chaperones 生物-细胞生物学
CiteScore
7.60
自引率
2.60%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Cell Stress and Chaperones is an integrative journal that bridges the gap between laboratory model systems and natural populations. The journal captures the eclectic spirit of the cellular stress response field in a single, concentrated source of current information. Major emphasis is placed on the effects of climate change on individual species in the natural environment and their capacity to adapt. This emphasis expands our focus on stress biology and medicine by linking climate change effects to research on cellular stress responses of animals, micro-organisms and plants.
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