Logo
Homepage
Explore Our Models
My Cart
Contact
Subscribe
Models
Genetically Engineered Animals
Knockout Mice
Knockout Rats
Knockin Mice
Knockin Rats
Transgenic Mice
Transgenic Rats
Model Generation Techniques
Turboknockout<sup>®</sup> Gene Targeting
ES Cell Gene Targeting
Targeted Gene Editing
Regular Transgenic
PiggyBac Transgenesis
BAC Transgenic
Research Models
HUGO-GT™ Humanized Mice
Cre Mouse Lines
Humanized Target Gene Models
Metabolic Disease Models
Ophthalmic Disease Models
Neurological Disease Models
Autoimmune Disease Models
Immunodeficient Mouse Models
Humanized Immune System Mouse Models
Oncology & Immuno-oncology Models
Covid-19 Mouse Models
MouseAtlas Model Library
Knockout Cell Line Product Catalog
Tumor Cell Line Product Catalog
AAV Standard Product Catalog
Animal Supporting Services
Breeding Services
Cryopreservation & Recovery
Phenotyping Services
BAC Modification
Custom Cell Line Models
Induced Pluripotent Stem Cells (iPSCs)
Knockout Cell Lines
Knockin Cell Lines
Point Mutation Cell Lines
Overexpression Cell Lines
Virus Packaging
Adeno-associated Virus (AAV) Packaging
Lentivirus Packaging
Adenovirus Packaging
CRO Services
By Therapeutic Area
Oncology
Ophthalmology
Neuroscience
Metabolic & Cardiovascular Diseases
Autoimmune & Inflammatory
By Drug Type
AI-Powered AAV Discovery
Gene Therapy
Oligonucleotide Therapy
Antibody Therapy
Cell Immunotherapy
Resources
Promotion
Events & Webinars
Newsroom
Blogs & Insights
Resource Vault
Reference Databases
Peer-Reviewed Citations
Rare Disease Data Center
AbSeek
Cell iGeneEditor™ System
OriCell
Quality
Facility Overview
Animal Health & Welfare
Health Reports
About Us
Corporate Overview
Our Partners
Careers
Contact Us
Login
Request a Product Quote
Select products from our catalogs and submit your request. Our team will get back to you with detailed information.
Full Name
Email
Phone Number
Organization
Job Role
Country
Catalog Type
Product Name
Additional Comments
Cyagen values your privacy. We’d like to keep you informed about our latest offerings and insights. Your preferences:
You may unsubscribe from these communications at any time. See our Privacy Policy for details on opting out and data protection.
By clicking the button below, you consent to allow Cyagen to store and process the personal information submitted in this form to provide you the content requested.
C57BL/6JCya-Qars1em1/Cya
Common Name:
Qars1-KO
Product ID:
S-KO-17999
Background:
C57BL/6JCya
Product Type
Age
Genotype
Sex
Quantity
Price:
Contact for Pricing
Basic Information
Strain Name
Qars1-KO
Strain ID
KOCMP-97541-Qars1-B6J-VB
Gene Name
Qars1
Product ID
S-KO-17999
Gene Alias
1110018N24Rik; 1200016L19Rik; GLNRS; Qars
Background
C57BL/6JCya
NCBI ID
97541
Modification
Conventional knockout
Chromosome
9
Phenotype
MGI:1915851
Document
Click here to download >>
Application
--
More
Rare Disease Data Center >>
Note
Note: When using this mouse strain in a publication, please cite “C57BL/6JCya-Qars1em1/Cya mice (Catalog S-KO-17999) were purchased from Cyagen.”
Strain Description
Ensembl Number
ENSMUST00000006838
NCBI RefSeq
NM_133794
Target Region
Exon 6~7
Size of Effective Region
~0.3 kb
Detailed Document
Click here to download >>
Overview of Gene Research
Qars1, encoding human glutaminyl-tRNA synthetase, is a gene involved in protein synthesis, specifically the ligation of glutamine to its cognate tRNAs. This process is fundamental for the accurate translation of messenger RNA into proteins, a key biological pathway in all cells [5].

Mutations in Qars1 have been associated with severe clinical phenotypes. A study reported three patients with compound heterozygous variations in Qars1, presenting a syndrome of severe global developmental retardation, progressive microcephaly, hypotonia, mild hypoproteinemia, and diffuse brain atrophy. Their epilepsy was often refractory to many anti-epilepsy drugs [1]. Another case of a 4-year-old girl with novel compound heterozygous Qars1 variants showed orofacial dyskinesia, hand stereotypies, and focal seizures, with very mild cortical volume loss on MRI [2]. Siblings with a homozygous missense variation in Qars1 gene exon 2 had developmental epileptic encephalopathy, severe global developmental delay, and microcephaly [3]. A 6-year-old patient with compound heterozygous Qars1 variants had childhood-onset focal epilepsy, developmental delay, short stature, and an episode of steroid-responsive acute para-infectious encephalopathy [4].

In conclusion, Qars1 is essential for normal protein synthesis. Genetic studies on patients with Qars1 mutations have revealed its crucial role in preventing severe neurological disorders such as developmental epileptic encephalopathy, early-onset refractory epilepsy, and associated neurodevelopmental deficits. Understanding Qars1 function through these patient-based genetic models can potentially guide the development of targeted therapies for these rare and debilitating conditions.

References:
1. Shen, Y W, Weng, Z F, He, W, Liu, L Y, Shang-Guan, H K. . [QARS1 gene related glutaminyl-tRNA synthetase deficiency syndrome: report of three cases and a review of literature]. In Zhonghua er ke za zhi = Chinese journal of pediatrics, 58, 1006-1012. doi:10.3760/cma.j.cn112140-20200603-00571. https://pubmed.ncbi.nlm.nih.gov/33256324/
2. Chan, Denise L, Rudinger-Thirion, Joëlle, Frugier, Magali, Kothur, Kavitha, Mohammad, Shekeeb S. 2021. A case of QARS1 associated epileptic encephalopathy and review of epilepsy in aminoacyl-tRNA synthetase disorders. In Brain & development, 44, 142-147. doi:10.1016/j.braindev.2021.10.009. https://pubmed.ncbi.nlm.nih.gov/34774383/
3. Srivastava, Preeti, Uddin, Md W, Diwakar, Kumar, Biswal, Summet, Senapati, Aishwarya. 2025. Homozygous Mutation in the QARS1 Gene Causing Developmental Epileptic Encephalopathy in Siblings in the Southeast Asian Region: An Interesting Case Report and Discussion. In Cureus, 17, e78333. doi:10.7759/cureus.78333. https://pubmed.ncbi.nlm.nih.gov/40034633/
4. Yahya, Vidal, Monfrini, Edoardo, Celato, Andrea, Di Fonzo, Alessio, Dilena, Robertino. 2024. Childhood-onset focal epilepsy and acute para-infectious encephalopathy in a patient with biallelic QARS1 variants. In Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology, 46, 1395-1398. doi:10.1007/s10072-024-07957-z. https://pubmed.ncbi.nlm.nih.gov/39715963/
5. Kim, Dong Kyu, Lee, Kayoung, Kang, Beom Sik. 2024. Assembly of the Human Multi-tRNA Synthetase Complex Through Leucine Zipper Motifs. In Journal of molecular biology, 436, 168865. doi:10.1016/j.jmb.2024.168865. https://pubmed.ncbi.nlm.nih.gov/39542129/
Quality Control Standard
Sperm Test

Pre-cryopreservation: Measurement of sperm concentration, determination of sperm viability.

Post-cryopreservation: A vial of cryopreserved sperms is selected for in-vitro fertilization from each batch.

Environmental Standards:SPF
Available Region:Global
Source:Cyagen
Model Library
Model Library
Resources
Resources
Animal Quality
Animal Quality
Get Support
Get Support
Address:
2255 Martin Avenue, Suite E Santa Clara, CA 95050-2709, US
Tel:
800-921-8930 (8-6pm PST)
+1408-963-0306 (lnt’l)
Fax:
408-969-0338
Email:
animal-service@cyagen.com
service@cyagen.us
CRO Services
OncologyOphthalmologyNeuroscienceMetabolic & CardiovascularAutoimmune & InflammatoryGene TherapyAntibody Therapy
About Us
Corporate OverviewOur PartnersCareersContact Us
Social Media
Disclaimer: Pricing and availability of our products and services vary by region. Listed prices are applicable to the specific countries. Please contact us for more information.
Copyright © 2025 Cyagen. All rights reserved.
Privacy Policy
Site Map
Stay Updated with the Latest from Cyagen
Get the latest news on our research models, CRO services, scientific resources, and special offers—tailored to your research needs and delivered straight to your inbox.
Full Name
Email
Organization
Country
Areas of Interest