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Lead Time
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Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Usage
For Research Use Only. Not for use in diagnostic or therapeutic procedures.
ATP-dependent RNA helicase required during spermatogenesis. Required to repress transposable elements and preventing their mobilization, which is essential for the germline integrity. Acts via the piRNA metabolic process, which mediates the repression of transposable elements during meiosis by forming complexes composed of piRNAs and Piwi proteins and governs the methylation and subsequent repression of transposons. Involved in the secondary piRNAs metabolic process, the production of piRNAs in fetal male germ cells through a ping-pong amplification cycle. Required for PIWIL2 slicing-triggered piRNA biogenesis: helicase activity enables utilization of one of the slice cleavage fragments generated by PIWIL2 and processing these pre-piRNAs into piRNAs.
Gene References into Functions
Four sterility-related genes, including BOLL, DDX4, HORMAD1, and MAEL, were found to have increased methylation at CpGs of the promoter regions and decreased mRNA expressions in nonobstructive azoospermia and hypospermatogenesis (HS) testis and are believed to be associated with HS.PMID:28342926
positivity for DDX4 gene was detected in 17 of 39 males with nonobstructive azoospermia which was due to maturation arrest in 35.3% of cases, due to incomplete Sertoli cell only in 23.5% and due to complete Sertoli cell only in 41.2%.PMID:28000927
Results suggest that DDX4 positively regulates cell cycle progression of diverse somatic-derived blood cancer cells, implying its broad contributions to the cancer cell phenotype.PMID:28612512
DDX4 cell-free seminal mRNA was absent in 44% of Sertoli cell-only syndrome cases diagnosed by testicular histopathology, but present in all patients presenting with maturation arrest or hypospermatogenesisPMID:27211570
The 20-mer peptide (residues 228-247) of human DDX-4, an ATP-dependent RNA helicase known to regulate germ cell development, binds to a unique shallow binding surface on RanBPM formed by highly conserved loops on the surface of the beta-sheet with two aspartates on one end, a positive patch on the opposite end, and a tryptophan lining at the bottom of the surface.PMID:27622290
Data show that intrinsically disordered N terminus of DEAD-box RNA helicase Ddx4 forms organelles in HeLa cells and in vitro.PMID:25747659
this study reports the first analysis and comparison of the expression patterns and colocalization of DDX4 and CD133 in 59 ovarian cancer patients via tissue microarray and immunofluorescence analysis to identify the expression patterns and relationship of those two markers in ovarian cancer cells.PMID:24727449
Data suggest that VASA shows differential expression in ovary; in resting primordial follicle reserve in childhood/pre-puberty, VASA is associated with Balbiani's body space in germ cell; once follicle enters growing pool, VASA is undetectable.PMID:23315064
Vasa/Ddx4 gene can be involved in regulation of ground and primed states of pluripotencyPMID:22288104
overexpression of VASA and or DAZL, in both embryonic and induced pluripotent stem cells promoted differentiation into primordial germ cells, and maturation and progression through meiosis was enhanced.PMID:22162380
Report the generation/characterization of embryonic stem cell lines carrying a VASA-pEGFP-1 reporter construct that expresses GFP in a population of differentiating cells showing expression of characteristic markers of primordial germ cells.PMID:19937754
marker for normal and malignant germ cellsPMID:11850529
The expression of VASA mRNA and protein was significantly decreased in the sperm of oligozoospermic men.PMID:17486274
VASA showed a differential pattern of expression throughout the differentiation and proliferative phase and prophase I to finally associate with Balbiani's body in primordial and primary follicles.PMID:18534994
Over-expression of VASA abrogates the G2 checkpoint, induced by DNA damage, by down-regulating the expression of 14-3-3sigma. Results suggest that VASA may play a role in the progression of ovarian cancer or serve as a valuable marker of tumorigenesis.PMID:18805576
Highly methylated regions of the VASA gene are associated with maturation arrest phenotype in the testis.PMID:19629140
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Subcellular Location
Cytoplasm. Cytoplasm, perinuclear region.
Protein Families
DEAD box helicase family, DDX4/VASA subfamily
Tissue Specificity
Expressed only in ovary and testis. Expressed in migratory primordial germ cells in the region of the gonadal ridge in both sexes.