C57BL/6JCya-Gnat1em1flox/Cya
Common Name:
Gnat1-flox
Product ID:
S-CKO-02680
Background:
C57BL/6JCya
Product Type
Age
Genotype
Sex
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Basic Information
Strain Name
Gnat1-flox
Strain ID
CKOCMP-14685-Gnat1-B6J-VA
Gene Name
Product ID
S-CKO-02680
Gene Alias
Gnat-1; Hg1f; Ird1; Ird2; Tralpha; irdc; irdr; transducin
Background
C57BL/6JCya
NCBI ID
Modification
Conditional knockout
Chromosome
9
Phenotype
Document
Application
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Note: When using this mouse strain in a publication, please cite “C57BL/6JCya-Gnat1em1flox/Cya mice (Catalog S-CKO-02680) were purchased from Cyagen.”
Strain Description
Ensembl Number
ENSMUST00000010205
NCBI RefSeq
NM_008140
Target Region
Exon 2~8
Size of Effective Region
~2.8 kb
Detailed Document
Overview of Gene Research
GNAT1 encodes the α subunit of the rod transducin protein, a key element in the rod phototransduction cascade [2]. It is mainly involved in vision-related processes, especially in dark-adapted (scotopic) vision. Mutations in GNAT1 can lead to various retinal disorders, highlighting its importance in maintaining normal retinal function. Genetic models, such as knockout mice, are valuable for studying its functions.
In a consanguineous Pakistani family, a missense mutation in GNAT1 (p.D129G) was identified, associated with autosomal recessive stationary night blindness [1]. A novel homozygous truncating mutation in GNAT1 was found in a patient with retinitis pigmentosa, suggesting that some GNAT1 variants can cause recessive, late-onset retinal degeneration [2]. In Gnat1-/-mice, constitutively depolarized rods release excessive glutamate, accelerating deep plexus angiogenesis and paracellular blood-retinal barrier maturation, indicating its role in regulating these retinal processes [3]. Also, in Gnat1-/-; Gnat2cpfl3/cpfl3 mice (global knockouts for rod and cone α-transducin proteins), robust light responses related to melanopsin-mediated signal were observed, showing melanopsin-mediated phototransduction can contribute to the primary pattern-forming visual pathway [4].
In conclusion, GNAT1 is crucial for normal rod-mediated phototransduction and maintaining retinal function. Studies using gene knockout mouse models have revealed its role in various retinal-related biological processes and diseases, including congenital stationary night blindness and retinitis pigmentosa. Understanding GNAT1 functions helps in comprehending the mechanisms underlying retinal disorders and may provide insights for potential therapeutic strategies.
References:
1. Naeem, Muhammad Asif, Chavali, Venkata R M, Ali, Shahbaz, Hejtmancik, J Fielding, Riazuddin, S Amer. 2012. GNAT1 associated with autosomal recessive congenital stationary night blindness. In Investigative ophthalmology & visual science, 53, 1353-61. doi:10.1167/iovs.11-8026. https://pubmed.ncbi.nlm.nih.gov/22190596/
2. Carrigan, Matthew, Duignan, Emma, Humphries, Pete, Kenna, Paul F, Farrar, G Jane. 2015. A novel homozygous truncating GNAT1 mutation implicated in retinal degeneration. In The British journal of ophthalmology, 100, 495-500. doi:10.1136/bjophthalmol-2015-306939. https://pubmed.ncbi.nlm.nih.gov/26472407/
3. Biswas, Saptarshi, Shahriar, Sanjid, Bachay, Galina, Brunken, William J, Agalliu, Dritan. 2024. Glutamatergic neuronal activity regulates angiogenesis and blood-retinal barrier maturation via Norrin/β-catenin signaling. In Neuron, 112, 1978-1996.e6. doi:10.1016/j.neuron.2024.03.011. https://pubmed.ncbi.nlm.nih.gov/38599212/
4. Flood, Michael D, Veloz, Hannah L B, Hattar, Samer, Carvalho-de-Souza, Joao L. 2022. Robust visual cortex evoked potentials (VEP) in Gnat1 and Gnat2 knockout mice. In Frontiers in cellular neuroscience, 16, 1090037. doi:10.3389/fncel.2022.1090037. https://pubmed.ncbi.nlm.nih.gov/36605613/
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