Incidental Mutation 'R6950:Dffb'
Institutional Source Beutler Lab
Gene Symbol Dffb
Ensembl Gene ENSMUSG00000029027
Gene NameDNA fragmentation factor, beta subunit
Synonyms5730477D02Rik, caspase-activated DNase, Didff, CAD, CPAN, DFF40, 40kDa
MMRRC Submission
Accession Numbers
Is this an essential gene? Non essential (E-score: 0.000) question?
Stock #R6950 (G1)
Quality Score225.009
Status Validated
Chromosomal Location153964449-153975126 bp(-) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) A to T at 153970092 bp
Amino Acid Change Methionine to Lysine at position 180 (M180K)
Ref Sequence ENSEMBL: ENSMUSP00000030893 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000030893] [ENSMUST00000133607]
PDB Structure
Predicted Effect probably benign
Transcript: ENSMUST00000030893
AA Change: M180K

PolyPhen 2 Score 0.000 (Sensitivity: 1.00; Specificity: 0.00)
SMART Domains Protein: ENSMUSP00000030893
Gene: ENSMUSG00000029027
AA Change: M180K

CAD 9 81 2.48e-41 SMART
Pfam:DFF40 103 324 9.4e-97 PFAM
low complexity region 330 344 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000133607
Coding Region Coverage
  • 1x: 100.0%
  • 3x: 99.9%
  • 10x: 99.4%
  • 20x: 98.4%
Validation Efficiency 98% (59/60)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] Apoptosis is a cell death process that removes toxic and/or useless cells during mammalian development. The apoptotic process is accompanied by shrinkage and fragmentation of the cells and nuclei and degradation of the chromosomal DNA into nucleosomal units. DNA fragmentation factor (DFF) is a heterodimeric protein of 40-kD (DFFB) and 45-kD (DFFA) subunits. DFFA is the substrate for caspase-3 and triggers DNA fragmentation during apoptosis. DFF becomes activated when DFFA is cleaved by caspase-3. The cleaved fragments of DFFA dissociate from DFFB, the active component of DFF. DFFB has been found to trigger both DNA fragmentation and chromatin condensation during apoptosis. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene but the biological validity of some of these variants has not been determined. [provided by RefSeq, Sep 2013]
PHENOTYPE: Mice homozygous for a knock-out allele are viable, fertile and developmentally normal; however, mutant thymocytes and other cell types fail to undergo apoptotic DNA fragmentation in response to dexamethasone or other apoptotic stimuli. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 59 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Abcc1 T A 16: 14,411,616 V404D probably damaging Het
Adcy2 A G 13: 68,888,065 M159T possibly damaging Het
Agtpbp1 T C 13: 59,450,266 K674R probably benign Het
Atxn7 C A 14: 14,095,511 P403H probably damaging Het
Cav3 C T 6: 112,472,210 T63I probably damaging Het
Ccr6 T C 17: 8,257,066 *368Q probably null Het
Cdh8 A T 8: 99,030,763 N734K probably benign Het
Ces5a G T 8: 93,530,774 N134K probably benign Het
Cisd3 T G 11: 97,686,160 probably null Het
Cyp4f39 T G 17: 32,492,306 C476G probably damaging Het
Dock4 A G 12: 40,733,314 E749G possibly damaging Het
Eogt A G 6: 97,134,382 F173L possibly damaging Het
Ephb1 T A 9: 102,194,909 T224S probably benign Het
Fam114a1 A T 5: 64,979,979 E88D possibly damaging Het
Fam84b T C 15: 60,823,714 D61G probably benign Het
Fbn2 A C 18: 58,035,921 M2262R probably null Het
Fsip2 A G 2: 82,985,988 I4022V probably benign Het
Gapvd1 A G 2: 34,684,245 V1301A probably benign Het
Gch1 A T 14: 47,189,266 M1K probably null Het
Hes1 T C 16: 30,067,271 F231S probably damaging Het
Hoxb2 A G 11: 96,351,901 T31A probably benign Het
Ifngr1 T A 10: 19,607,293 V265D probably damaging Het
Ifnl3 A T 7: 28,523,007 I58F probably benign Het
Igf2r T C 17: 12,718,718 T561A probably benign Het
Igfbpl1 T A 4: 45,815,494 H214L probably damaging Het
Irf8 A G 8: 120,755,125 T318A probably benign Het
Kmt2d T C 15: 98,840,020 probably benign Het
Lrrc36 G T 8: 105,425,389 probably null Het
Msl2 C T 9: 101,101,975 P516L possibly damaging Het
Naaladl1 A T 19: 6,105,981 I62F probably damaging Het
Neto2 G T 8: 85,670,443 P60Q probably damaging Het
Nipsnap3b A T 4: 53,015,136 H61L possibly damaging Het
Npb T C 11: 120,608,647 F47L probably benign Het
Nutm1 T A 2: 112,248,559 T1004S probably benign Het
Olfr1251 T A 2: 89,667,551 I112F probably benign Het
Olfr1427 A G 19: 12,099,390 V83A probably benign Het
Olfr895 A T 9: 38,268,546 N3I probably damaging Het
Oxr1 C A 15: 41,820,555 A439E probably benign Het
Phf14 A T 6: 12,006,855 K835N probably damaging Het
Prkdc T A 16: 15,815,986 V3518E probably damaging Het
Ptpru T A 4: 131,776,352 E1132D probably damaging Het
Rapgef6 T A 11: 54,676,380 M1129K probably benign Het
Rgmb T C 17: 15,807,786 K224E probably damaging Het
Ryr3 T C 2: 112,686,825 I3318V possibly damaging Het
Slc9a4 A G 1: 40,602,885 Y338C probably damaging Het
Smg5 T C 3: 88,349,269 probably null Het
Tenm3 A T 8: 48,240,479 Y1789* probably null Het
Tgm7 T C 2: 121,093,647 E598G probably damaging Het
Tiam1 C T 16: 89,860,204 probably null Het
Tmem175 A G 5: 108,643,082 N166S probably benign Het
Trp73 G T 4: 154,062,053 N368K probably benign Het
Trpc3 C T 3: 36,638,590 R751H probably damaging Het
Trpm4 C A 7: 45,319,280 A410S probably damaging Het
Ube2t T G 1: 134,971,357 probably null Het
Vmn2r114 C T 17: 23,310,163 A322T probably benign Het
Xylt2 C T 11: 94,667,629 R567H probably benign Het
Zfp119b T C 17: 55,939,137 K318E probably damaging Het
Zfp626 T G 7: 27,818,914 L440R probably damaging Het
Zfp850 A G 7: 27,990,514 S90P possibly damaging Het
Other mutations in Dffb
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL02502:Dffb APN 4 153965616 unclassified probably benign
R0243:Dffb UTSW 4 153965378 nonsense probably null
R0244:Dffb UTSW 4 153974615 missense probably benign 0.33
R2483:Dffb UTSW 4 153965519 missense probably damaging 1.00
R3622:Dffb UTSW 4 153965519 missense probably damaging 1.00
R3623:Dffb UTSW 4 153965519 missense probably damaging 1.00
R3624:Dffb UTSW 4 153965519 missense probably damaging 1.00
R4562:Dffb UTSW 4 153965456 missense probably damaging 1.00
R4912:Dffb UTSW 4 153965407 unclassified probably benign
R5015:Dffb UTSW 4 153972959 missense possibly damaging 0.84
R5986:Dffb UTSW 4 153965593 missense probably damaging 1.00
R7395:Dffb UTSW 4 153969113 missense probably damaging 1.00
Predicted Primers PCR Primer

Sequencing Primer
Posted On2018-11-28