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C57BL/6JCya-Dnajb7em1/Cya
Common Name:
Dnajb7-KO
Product ID:
S-KO-11043
Background:
C57BL/6JCya
Product Type
Age
Genotype
Sex
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Basic Information
Strain Name
Dnajb7-KO
Strain ID
KOCMP-57755-Dnajb7-B6J-VA
Gene Name
Dnajb7
Product ID
S-KO-11043
Gene Alias
4933424H20Rik; Dj5; mDj5
Background
C57BL/6JCya
NCBI ID
57755
Modification
Conventional knockout
Chromosome
15
Phenotype
MGI:1914012
Document
Click here to download >>
Application
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More
Rare Disease Data Center >>
Note
Note: When using this mouse strain in a publication, please cite “C57BL/6JCya-Dnajb7em1/Cya mice (Catalog S-KO-11043) were purchased from Cyagen.”
Strain Description
Ensembl Number
ENSMUST00000057236
NCBI RefSeq
NM_021317
Target Region
Exon 1
Size of Effective Region
~0.9 kb
Detailed Document
Click here to download >>
Overview of Gene Research
DnaJ heat shock protein family (Hsp40) member B7, also known as DNAJB7, is a member of the highly conserved DNAJBs proteins. These proteins are involved in various biological processes, and DNAJB7 in particular has been linked to protein translation [3]. It may also be involved in pathways related to chaperone-mediated protein folding and endoplasmic reticulum proteostasis, as its decreased expression was noted in classical Ehlers-Danlos syndrome patients' skin fibroblasts, where genes related to these functions were affected [4].

To study its role in male reproduction, Dnajb7-deficient mice were generated using the Nuclease technology-mediated genome editing system. The results showed that DNAJB7 is specifically expressed in haploid germ cells, but Dnajb7 knockout mice are fertile with no detectable defects in Sertoli cells, spermatogonia, meiotic and postmeiotic cells. This indicates that DNAJB7 is not essential for spermatogenesis and is dispensable for male fertility in mice [1]. In addition, DNAJB7 was identified as a novel cancer-testis antigen. It is expressed in many tumors and is strongly immunogenic in cancer patients. DNAJB7-specific T cells can kill colorectal tumor lines in vitro, and the IFNγ+ response can be enhanced by cyclophosphamide-mediated immunosuppression control [2]. Also, in a study on the effect of a Chinese 2-herb formula on endothelial cells, DNAJB7 was found to be involved in the wound healing angiogenesis process, specifically in protein translation [3].

In conclusion, DNAJB7's role in protein translation and potentially in chaperone-related functions is significant. The Dnajb7 knockout mouse model has been crucial in demonstrating its non-essential role in spermatogenesis and male fertility. Its identification as a cancer-testis antigen and its involvement in wound healing angiogenesis also highlight its importance in cancer immunotherapy and wound-related research areas.

References:

1. Bai, Shun, Hu, Meihong, Yu, Lina, Tong, Xianhong, Yue, Qiuling. 2023. DNAJB7 is dispensable for male fertility in mice. In Reproductive biology and endocrinology : RB&E, 21, 32. doi:10.1186/s12958-023-01086-6. https://pubmed.ncbi.nlm.nih.gov/37004113/

2. Scurr, Martin J, Greenshields-Watson, Alex, Campbell, Emma, Gallimore, Awen, Godkin, Andrew. 2020. Cancer Antigen Discovery Is Enabled by RNA Sequencing of Highly Purified Malignant and Nonmalignant Cells. In Clinical cancer research : an official journal of the American Association for Cancer Research, 26, 3360-3370. doi:10.1158/1078-0432.CCR-19-3087. https://pubmed.ncbi.nlm.nih.gov/32122920/

3. Tam, Jacqueline Chor Wing, Ko, Chun Hay, Koon, Chi Man, Chan, Wai Yee, Lau, Clara Bik San. 2015. Identification of Target Genes Involved in Wound Healing Angiogenesis of Endothelial Cells with the Treatment of a Chinese 2-Herb Formula. In PloS one, 10, e0139342. doi:10.1371/journal.pone.0139342. https://pubmed.ncbi.nlm.nih.gov/26430762/

4. Chiarelli, Nicola, Carini, Giulia, Zoppi, Nicoletta, Ritelli, Marco, Colombi, Marina. 2019. Molecular insights in the pathogenesis of classical Ehlers-Danlos syndrome from transcriptome-wide expression profiling of patients' skin fibroblasts. In PloS one, 14, e0211647. doi:10.1371/journal.pone.0211647. https://pubmed.ncbi.nlm.nih.gov/30716086/

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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