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C57BL/6NCya-Rbmxem1flox/Cya
Common Name:
Rbmx-flox
Product ID:
S-CKO-04747
Background:
C57BL/6NCya
Product Type
Age
Genotype
Sex
Quantity
Price:
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Basic Information
Strain Name
Rbmx-flox
Strain ID
CKOCMP-19655-Rbmx-B6N-VA
Gene Name
Rbmx
Product ID
S-CKO-04747
Gene Alias
hnRNP G
Background
C57BL/6NCya
NCBI ID
19655
Modification
Conditional knockout
Chromosome
X
Phenotype
MGI:1343044
Document
Click here to download >>
Application
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Rare Disease Data Center >>
Note
Note: When using this mouse strain in a publication, please cite “C57BL/6NCya-Rbmxem1flox/Cya mice (Catalog S-CKO-04747) were purchased from Cyagen.”
Strain Description
Ensembl Number
ENSMUST00000114726
NCBI RefSeq
NM_001166623
Target Region
Exon 4
Size of Effective Region
~0.7 kb
Detailed Document
Click here to download >>
Overview of Gene Research
Rbmx, an RNA binding protein encoded by a gene on the X chromosome, is ubiquitously expressed in the nucleus and belongs to a small protein family. It is crucial for normal development, contributing to splicing control, transcription, and genome integrity. It is implicated in pathways related to chromatin state maintenance, telomere stability, and replication stress response, with its functions having important implications for understanding chromosome biology, DNA repair, and mammalian development [2].

In myeloid leukemia, loss of Rbmx and its retrogene Rbmxl1 delays leukemia development, leading to changes in chromatin accessibility, chromosomal breaks, and gaps. Rbmx/L1 directly bind to mRNAs, affect transcription of multiple loci including Cbx5, and control Cbx5 locus nascent transcription. Forced Cbx5 expression can rescue the effects of Rbmx/L1 depletion on cell growth and apoptosis, suggesting Rbmx/L1 control leukemia cell survival by regulating chromatin state through Cbx5 [1].

In telomere stability, Rbmx depletion leads to elevated Telomeric repeat-containing RNA (TERRA) levels, enhanced telomere R-loop formation, replication stress, and telomere instability. Rbmx binds to TERRA and the nuclear exosome targeting protein ZCCHC8, promoting TERRA degradation [3].

In genome stability, Rbmx is an ssDNA binding protein that activates ATR on repetitive DNAs. Rbmx depletion leads to defective TopBP1 localization to replication-stressed sites, inadequate ATR activation, replication defects, and genome instability [4].

In summary, Rbmx is essential for multiple biological processes such as chromatin state regulation, telomere stability maintenance, and genome stability during replication. Its study through gene knockout or conditional knockout mouse models has revealed its significant roles in myeloid malignancies, providing potential therapeutic targets in these disease areas.

References:
1. Prieto, Camila, Nguyen, Diu T T, Liu, Zhaoqi, Rabadan, Raul, Kharas, Michael G. 2021. Transcriptional control of CBX5 by the RNA binding proteins RBMX and RBMXL1 maintains chromatin state in myeloid leukemia. In Nature cancer, 2, 741-757. doi:10.1038/s43018-021-00220-w. https://pubmed.ncbi.nlm.nih.gov/34458856/
2. Elliott, David J, Dalgliesh, Caroline, Hysenaj, Gerald, Ehrmann, Ingrid. 2018. RBMX family proteins connect the fields of nuclear RNA processing, disease and sex chromosome biology. In The international journal of biochemistry & cell biology, 108, 1-6. doi:10.1016/j.biocel.2018.12.014. https://pubmed.ncbi.nlm.nih.gov/30593955/
3. Liu, Jingfan, Zheng, Tian, Chen, Dandan, Ma, Wenbin, Liu, Haiying. 2023. RBMX involves in telomere stability maintenance by regulating TERRA expression. In PLoS genetics, 19, e1010937. doi:10.1371/journal.pgen.1010937. https://pubmed.ncbi.nlm.nih.gov/37756323/
4. Zheng, Tian, Zhou, Haoxian, Li, Xiaocui, Ren, Jian, Zhao, Yong. 2020. RBMX is required for activation of ATR on repetitive DNAs to maintain genome stability. In Cell death and differentiation, 27, 3162-3176. doi:10.1038/s41418-020-0570-8. https://pubmed.ncbi.nlm.nih.gov/32494026/
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
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