Incidental Mutation 'H8930:Ddx4'
ID540
Institutional Source Beutler Lab
Gene Symbol Ddx4
Ensembl Gene ENSMUSG00000021758
Gene NameDEAD (Asp-Glu-Ala-Asp) box polypeptide 4
SynonymsMvh, VASA, mvh / m'vasa
Accession Numbers

Genbank: NM_001145885, NM_010029

Is this an essential gene? Possibly essential (E-score: 0.682) question?
Stock #H8930 (G3) of strain frazz
Quality Score
Status Validated
Chromosome13
Chromosomal Location112598333-112652475 bp(-) (GRCm38)
Type of Mutationsplice site
DNA Base Change (assembly) A to C at 112613833 bp
ZygosityHomozygous
Amino Acid Change
Ref Sequence ENSEMBL: ENSMUSP00000096769 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000075748] [ENSMUST00000099166]
Predicted Effect probably null
Transcript: ENSMUST00000075748
SMART Domains Protein: ENSMUSP00000075157
Gene: ENSMUSG00000021758

DomainStartEndE-ValueType
Blast:DEXDc 22 165 8e-14 BLAST
low complexity region 175 183 N/A INTRINSIC
low complexity region 221 229 N/A INTRINSIC
DEXDc 280 491 9.38e-59 SMART
HELICc 527 608 1.18e-32 SMART
Predicted Effect probably null
Transcript: ENSMUST00000099166
SMART Domains Protein: ENSMUSP00000096769
Gene: ENSMUSG00000021758

DomainStartEndE-ValueType
Blast:DEXDc 41 191 7e-25 BLAST
low complexity region 201 209 N/A INTRINSIC
low complexity region 247 255 N/A INTRINSIC
DEXDc 306 517 9.38e-59 SMART
HELICc 553 634 1.18e-32 SMART
Meta Mutation Damage Score 0.9755 question?
Coding Region Coverage
  • 1x: 77.1%
  • 3x: 50.6%
Het Detection Efficiency25.5%
Validation Efficiency 74% (89/120)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] DEAD box proteins, characterized by the conserved motif Asp-Glu-Ala-Asp (DEAD), are putative RNA helicases. They are implicated in a number of cellular processes involving alteration of RNA secondary structure such as translation initiation, nuclear and mitochondrial splicing, and ribosome and spliceosome assembly. Based on their distribution patterns, some members of this family are believed to be involved in embryogenesis, spermatogenesis, and cellular growth and division. This gene encodes a DEAD box protein, which is a homolog of VASA proteins in Drosophila and several other species. The gene is specifically expressed in the germ cell lineage in both sexes and functions in germ cell development. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]
PHENOTYPE: Spermatogenesis is blocked in homozygous mutant mice, resulting in male infertility. Female mutant mice are fertile and do not exhibit any obvious reproductive defects. [provided by MGI curators]
Allele List at MGI

All alleles(5) : Targeted, other(3) Gene trapped(2)

Other mutations in this stock
Total: 7 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Cdc20b A T 13: 113,083,966 I460F probably damaging Homo
Ick T A 9: 78,150,619 I150N possibly damaging Het
Malt1 T G 18: 65,462,815 Y442* probably null Het
Mtr A G 13: 12,235,460 S346P probably damaging Het
Nup155 T C 15: 8,157,658 V1357A possibly damaging Het
Prl3c1 T A 13: 27,200,706 L46* probably null Het
Spata1 A T 3: 146,487,271 L155* probably null Homo
Other mutations in Ddx4
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL02030:Ddx4 APN 13 112624777 splice site probably benign
IGL02682:Ddx4 APN 13 112622186 missense probably benign 0.04
IGL02729:Ddx4 APN 13 112651412 utr 5 prime probably benign
R0518:Ddx4 UTSW 13 112624779 critical splice donor site probably null
R0521:Ddx4 UTSW 13 112624779 critical splice donor site probably null
R1527:Ddx4 UTSW 13 112622239 missense possibly damaging 0.95
R1548:Ddx4 UTSW 13 112599997 missense probably damaging 1.00
R1773:Ddx4 UTSW 13 112599902 missense probably benign
R1886:Ddx4 UTSW 13 112622665 missense probably damaging 1.00
R1969:Ddx4 UTSW 13 112600013 missense probably damaging 0.99
R1969:Ddx4 UTSW 13 112620742 missense probably damaging 0.99
R1970:Ddx4 UTSW 13 112600013 missense probably damaging 0.99
R1971:Ddx4 UTSW 13 112600013 missense probably damaging 0.99
R2265:Ddx4 UTSW 13 112621276 missense probably benign 0.08
R2280:Ddx4 UTSW 13 112620656 missense probably benign 0.03
R2846:Ddx4 UTSW 13 112604612 missense probably damaging 0.99
R2906:Ddx4 UTSW 13 112620777 splice site probably benign
R2980:Ddx4 UTSW 13 112612085 missense probably damaging 1.00
R3732:Ddx4 UTSW 13 112611982 missense possibly damaging 0.56
R4085:Ddx4 UTSW 13 112613761 missense probably benign 0.05
R4088:Ddx4 UTSW 13 112613761 missense probably benign 0.05
R4089:Ddx4 UTSW 13 112613761 missense probably benign 0.05
R4090:Ddx4 UTSW 13 112613761 missense probably benign 0.05
R4600:Ddx4 UTSW 13 112612060 missense probably damaging 1.00
R4610:Ddx4 UTSW 13 112612060 missense probably damaging 1.00
R4669:Ddx4 UTSW 13 112622244 missense probably damaging 1.00
R4700:Ddx4 UTSW 13 112613735 missense probably damaging 1.00
R4782:Ddx4 UTSW 13 112613696 critical splice donor site probably null
R4782:Ddx4 UTSW 13 112651360 missense probably benign 0.10
R5326:Ddx4 UTSW 13 112621245 missense probably damaging 1.00
R5542:Ddx4 UTSW 13 112621245 missense probably damaging 1.00
R6111:Ddx4 UTSW 13 112621232 nonsense probably null
R6253:Ddx4 UTSW 13 112636022 nonsense probably null
R6253:Ddx4 UTSW 13 112636023 missense probably benign 0.00
R6286:Ddx4 UTSW 13 112613735 missense probably damaging 1.00
R6518:Ddx4 UTSW 13 112604547 missense probably benign
R6645:Ddx4 UTSW 13 112641174 missense possibly damaging 0.70
R7017:Ddx4 UTSW 13 112601488 missense probably damaging 1.00
R7155:Ddx4 UTSW 13 112613785 missense probably benign 0.01
R7822:Ddx4 UTSW 13 112612113 missense probably damaging 1.00
R8041:Ddx4 UTSW 13 112626394 missense probably benign
R8048:Ddx4 UTSW 13 112622172 missense probably null 1.00
Nature of Mutation

DNA sequencing using the SOLiD technique identified a T to G transversion at base pair 113404041 in the Genbank genomic region NC_000079 (Build 37.1) for the Ddx4 gene on Chromosome 13 (TTATCTATAG ->TTAGCTATAG). The mutation is located within intron 13 from the ATG exon, seven nucleotides to the next exon. The Ddx4 gene contains 22 total exons (Genbank record NM_001145885). Two transcripts of the Ddx4 gene are displayed on Ensembl.  The mutation has been confirmed by DNA sequencing using the Sanger method (Figure 1). 

 
Protein Function and Prediction

The Ddx4 gene encodes a 702 amino acid protein that plays a role in germ cell development. The protein is an ATP-dependent  RNA helicase and is expressed specifically in the testis. DDX4 contains an ATP-binding helicase domain at residues 292-475, and a C-terminal helicase domain at residues 503-648. A Q motif and a helicase DEAD box motif are present at amino acids 261-289 and 419-422, respectively. ATP-binding occurs at amino acids 305-312 (Uniprot Q61496). Isoform 1 (displayed on Genbank) contains 728 amino acids. Spermatogenesis is blocked in homozygous mutant mice, resulting in male infertility. Female mutant mice are fertile and do not exhibit any obvious reproductive defects.

Posted On2010-11-11