PUBLICATION
A single Danio rerio hars gene encodes both cytoplasmic and mitochondrial histidyl-tRNA synthetases
- Authors
- Waldron, A.L., Cahan, S.H., Franklyn, C.S., Ebert, A.M.
- ID
- ZDB-PUB-170922-6
- Date
- 2017
- Source
- PLoS One 12: e0185317 (Journal)
- Registered Authors
- Keywords
- Zebrafish, Mitochondria, Aminoacyl-tRNA synthetases, Sequence alignment, Human genomics, Phylogenetic analysis, Genome analysis, Transfer RNA
- MeSH Terms
-
- Animals
- COS Cells
- Chlorocebus aethiops
- Conserved Sequence
- Cytoplasm/enzymology*
- Cytoplasm/genetics*
- Gene Expression Regulation, Enzymologic
- Histidine-tRNA Ligase/chemistry
- Histidine-tRNA Ligase/genetics*
- Histidine-tRNA Ligase/metabolism
- Humans
- Mitochondria/enzymology*
- Protein Transport
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Species Specificity
- Zebrafish/genetics*
- PubMed
- 28934368 Full text @ PLoS One
Citation
Waldron, A.L., Cahan, S.H., Franklyn, C.S., Ebert, A.M. (2017) A single Danio rerio hars gene encodes both cytoplasmic and mitochondrial histidyl-tRNA synthetases. PLoS One. 12:e0185317.
Abstract
Histidyl tRNA Synthetase (HARS) is a member of the aminoacyl tRNA synthetase (ARS) family of enzymes. This family of 20 enzymes is responsible for attaching specific amino acids to their cognate tRNA molecules, a critical step in protein synthesis. However, recent work highlighting a growing number of associations between ARS genes and diverse human diseases raises the possibility of new and unexpected functions in this ancient enzyme family. For example, mutations in HARS have been linked to two different neurological disorders, Usher Syndrome Type IIIB and Charcot Marie Tooth peripheral neuropathy. These connections raise the possibility of previously undiscovered roles for HARS in metazoan development, with alterations in these functions leading to complex diseases. In an attempt to establish Danio rerio as a model for studying HARS functions in human disease, we characterized the Danio rerio hars gene and compared it to that of human HARS. Using a combination of bioinformatics, molecular biology, and cellular approaches, we found that while the human genome encodes separate genes for cytoplasmic and mitochondrial HARS protein, the Danio rerio genome encodes a single hars gene which undergoes alternative splicing to produce the respective cytoplasmic and mitochondrial versions of Hars. Nevertheless, while the HARS genes of humans and Danio differ significantly at the genomic level, we found that they are still highly conserved at the amino acid level, underscoring the potential utility of Danio rerio as a model organism for investigating HARS function and its link to human diseases in vivo.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping