Incidental Mutation 'R2483: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 040407-MU
Accession Numbers
Is this an essential gene? Non essential (E-score: 0.000) question?
Stock #R2483 (G1)
Quality Score225
Status Not validated
Chromosomal Location153964449-153975126 bp(-) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) T to C at 153965519 bp
Amino Acid Change Threonine to Alanine at position 296 (T296A)
Ref Sequence ENSEMBL: ENSMUSP00000030893 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000030893] [ENSMUST00000058393] [ENSMUST00000105645] [ENSMUST00000133607] [ENSMUST00000141493] [ENSMUST00000147826]
PDB Structure
Predicted Effect probably damaging
Transcript: ENSMUST00000030893
AA Change: T296A

PolyPhen 2 Score 0.999 (Sensitivity: 0.14; Specificity: 0.99)
SMART Domains Protein: ENSMUSP00000030893
Gene: ENSMUSG00000029027
AA Change: T296A

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: ENSMUST00000058393
SMART Domains Protein: ENSMUSP00000054638
Gene: ENSMUSG00000047613

Pfam:UPF0688 6 228 9.9e-99 PFAM
Predicted Effect probably benign
Transcript: ENSMUST00000105645
Predicted Effect noncoding transcript
Transcript: ENSMUST00000128457
Predicted Effect noncoding transcript
Transcript: ENSMUST00000133524
Predicted Effect probably benign
Transcript: ENSMUST00000133607
Predicted Effect probably benign
Transcript: ENSMUST00000141493
Predicted Effect probably benign
Transcript: ENSMUST00000147826
Predicted Effect noncoding transcript
Transcript: ENSMUST00000219093
Meta Mutation Damage Score 0.408 question?
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.6%
  • 10x: 97.5%
  • 20x: 95.6%
Validation Efficiency
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: 81 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
A230050P20Rik A T 9: 20,873,177 I186F possibly damaging Het
Adcy1 A G 11: 7,130,348 T364A probably benign Het
Adpgk G A 9: 59,313,753 V281I probably benign Het
Akap9 C A 5: 3,976,235 Q1297K possibly damaging Het
Ankrd13d T C 19: 4,281,940 E110G probably damaging Het
Ankrd53 A G 6: 83,763,262 E104G possibly damaging Het
Ano6 A T 15: 95,965,974 T792S probably benign Het
Atm A T 9: 53,510,266 V715D probably damaging Het
Avl9 A G 6: 56,736,843 D362G probably benign Het
Bin1 T A 18: 32,414,227 S152R probably damaging Het
Bscl2 T A 19: 8,841,150 C40S probably benign Het
Btaf1 A G 19: 36,981,086 T668A probably benign Het
Btrc A G 19: 45,516,058 D397G probably damaging Het
C530008M17Rik A T 5: 76,856,409 I206F probably damaging Het
Cables2 A T 2: 180,260,429 V379E probably damaging Het
Cacna2d2 T C 9: 107,512,022 L228P probably damaging Het
Cd109 A T 9: 78,667,357 D541V probably damaging Het
Cdh26 A T 2: 178,466,589 S327C probably damaging Het
Cep78 T C 19: 15,960,980 K535E probably damaging Het
Ces1a A G 8: 93,027,341 Y345H probably damaging Het
Col6a5 C A 9: 105,864,148 R2524I probably damaging Het
Dctn1 G A 6: 83,194,187 R661H probably damaging Het
Ddias T C 7: 92,859,592 T372A probably benign Het
Dock8 A G 19: 25,079,877 Q216R probably benign Het
Emx1 T C 6: 85,188,255 S105P probably benign Het
Ep400 T C 5: 110,719,236 Y1014C unknown Het
Fam193a A T 5: 34,465,758 K1230M possibly damaging Het
Fgf9 A G 14: 58,109,571 Q207R probably benign Het
Gm5460 G A 14: 34,045,818 C461Y possibly damaging Het
Gpc1 T C 1: 92,855,938 I249T probably benign Het
Htr1d T C 4: 136,443,504 I348T probably damaging Het
Hyal4 A T 6: 24,765,738 S364C probably damaging Het
Igfn1 T C 1: 135,969,537 E1097G probably benign Het
Igkv1-133 A T 6: 67,724,960 Q16L probably benign Het
Kcnh5 A T 12: 75,114,471 I221N probably damaging Het
Kmt2a A G 9: 44,848,966 Y529H probably damaging Het
Kyat1 T C 2: 30,186,698 H218R possibly damaging Het
Lamb2 T G 9: 108,480,559 C94G probably damaging Het
Met A T 6: 17,549,086 D979V probably damaging Het
Midn A G 10: 80,150,310 D78G probably benign Het
Myh1 A T 11: 67,211,226 M811L probably benign Het
Myh7 T C 14: 54,973,381 E1693G probably damaging Het
Myo15b A G 11: 115,864,739 T979A probably benign Het
Myo18b A T 5: 112,858,408 C879S probably damaging Het
Myom1 A G 17: 71,077,812 T733A probably damaging Het
Ndufa9 A T 6: 126,844,399 M76K possibly damaging Het
Nectin3 A G 16: 46,395,179 C74R possibly damaging Het
Obscn A G 11: 59,080,146 F2514L probably damaging Het
Olfr1241 G A 2: 89,483,127 Q3* probably null Het
Olfr510 CAAATA CA 7: 108,667,662 probably null Het
Olfr653 T C 7: 104,579,942 S99P probably damaging Het
P2ry2 A T 7: 100,998,499 S200T probably benign Het
Pcdha5 G T 18: 36,961,489 M350I probably benign Het
Pcdha5 G A 18: 36,961,781 V448M probably damaging Het
Pex12 C T 11: 83,297,629 R180H possibly damaging Het
Pkd1l1 A T 11: 8,962,701 V168E probably damaging Het
Prokr2 T A 2: 132,381,175 D149V probably damaging Het
Rnf123 A G 9: 108,063,521 V707A probably benign Het
Ryr2 T C 13: 11,759,703 E1189G probably damaging Het
Scarf1 T C 11: 75,515,291 F134L probably damaging Het
Sfxn5 A G 6: 85,332,278 probably null Het
Slc17a5 A T 9: 78,538,274 V433D probably damaging Het
Snapc1 A G 12: 73,964,643 T28A probably benign Het
Soat1 T C 1: 156,431,099 Y528C probably damaging Het
Spem1 G A 11: 69,821,518 R107C possibly damaging Het
Srcap T C 7: 127,542,147 S1639P probably damaging Het
Sycp2 A T 2: 178,374,595 N691K probably damaging Het
Syne2 A T 12: 76,095,537 I6183F probably damaging Het
Tas2r110 A T 6: 132,868,470 M155L probably benign Het
Tenm3 G A 8: 48,240,270 T1859I probably damaging Het
Thsd7b T A 1: 130,103,072 V1048D probably damaging Het
Tmem55b C G 14: 50,930,292 V59L probably damaging Het
Ttc37 A G 13: 76,182,867 E1472G probably damaging Het
Vav3 T C 3: 109,341,166 L43P probably damaging Het
Vmn1r30 A T 6: 58,435,452 F132I probably benign Het
Vmn2r24 A G 6: 123,816,038 R775G probably damaging Het
Vps13c T A 9: 67,975,907 probably null Het
Vps37c T A 19: 10,706,205 probably null Het
Wwp2 A G 8: 107,548,535 D388G probably damaging Het
Xirp2 A T 2: 67,524,992 T3366S probably benign Het
Zbtb49 A C 5: 38,203,357 probably benign 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
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
R6950:Dffb UTSW 4 153970092 missense probably benign
R7395:Dffb UTSW 4 153969113 missense probably damaging 1.00
Predicted Primers PCR Primer

Sequencing Primer
Posted On2014-12-04