Incidental Mutation 'R7395:Dffb'
ID 573717
Institutional Source Beutler Lab
Gene Symbol Dffb
Ensembl Gene ENSMUSG00000029027
Gene Name DNA fragmentation factor, beta subunit
Synonyms Didff, caspase-activated DNase, CAD, 5730477D02Rik, CPAN, 40kDa, DFF40
MMRRC Submission 045477-MU
Accession Numbers
Essential gene? Non essential (E-score: 0.000) question?
Stock # R7395 (G1)
Quality Score 225.009
Status Validated
Chromosome 4
Chromosomal Location 154048904-154059578 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to T at 154053570 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Serine to Arginine at position 257 (S257R)
Ref Sequence ENSEMBL: ENSMUSP00000030893 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000030893] [ENSMUST00000133607]
AlphaFold O54788
PDB Structure NMR STRUCTURE OF THE CAD DOMAIN OF CASPASE-ACTIVATED DNASE [SOLUTION NMR]
NMR STRUCTURE OF THE HETERODIMERIC COMPLEX BETWEEN CAD DOMAINS OF CAD AND ICAD [SOLUTION NMR]
CRYSTAL STRUCTURE OF CASPASE-ACTIVATED DNASE (CAD) [X-RAY DIFFRACTION]
Predicted Effect probably damaging
Transcript: ENSMUST00000030893
AA Change: S257R

PolyPhen 2 Score 0.999 (Sensitivity: 0.14; Specificity: 0.99)
SMART Domains Protein: ENSMUSP00000030893
Gene: ENSMUSG00000029027
AA Change: S257R

DomainStartEndE-ValueType
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
Meta Mutation Damage Score 0.6467 question?
Coding Region Coverage
  • 1x: 100.0%
  • 3x: 99.9%
  • 10x: 99.6%
  • 20x: 98.8%
Validation Efficiency 99% (92/93)
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: 94 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
3830403N18Rik G T X: 55,184,140 (GRCm39) probably null Het
4930433I11Rik A T 7: 40,639,102 (GRCm39) T13S probably damaging Het
Abca13 A G 11: 9,241,658 (GRCm39) I1174V probably benign Het
Acoxl G A 2: 127,726,336 (GRCm39) V237M probably damaging Het
Adam33 A C 2: 130,903,089 (GRCm39) W52G probably benign Het
Adgrv1 T C 13: 81,707,467 (GRCm39) H1313R probably damaging Het
Ap3d1 T C 10: 80,566,716 (GRCm39) T89A probably benign Het
Armc8 T C 9: 99,415,185 (GRCm39) E165G probably damaging Het
Atp6v1c1 T C 15: 38,691,949 (GRCm39) *383Q probably null Het
Atp8b4 A T 2: 126,217,614 (GRCm39) L634Q possibly damaging Het
B3glct A G 5: 149,649,069 (GRCm39) probably null Het
Bhlhe40 TG TGG 6: 108,641,818 (GRCm39) 254 probably null Het
Bicd2 A G 13: 49,531,706 (GRCm39) D316G possibly damaging Het
Bop1 A T 15: 76,338,041 (GRCm39) S610T probably damaging Het
Car11 T A 7: 45,350,745 (GRCm39) Y80* probably null Het
Ccdc121rt2 A T 5: 112,598,035 (GRCm39) E194V possibly damaging Het
Ccdc96 T C 5: 36,642,609 (GRCm39) I205T probably benign Het
Ces2a A G 8: 105,466,273 (GRCm39) E390G probably benign Het
Cfap54 C A 10: 92,720,565 (GRCm39) V2630L unknown Het
Chek2 G T 5: 111,019,974 (GRCm39) probably null Het
Cntn3 C T 6: 102,314,355 (GRCm39) probably null Het
Cpne3 A T 4: 19,528,239 (GRCm39) D339E probably damaging Het
Crocc2 C T 1: 93,143,829 (GRCm39) Q1403* probably null Het
Crppa A T 12: 36,551,994 (GRCm39) I283F possibly damaging Het
Csnka2ip G A 16: 64,299,803 (GRCm39) T187I Het
Ctu1 A G 7: 43,326,019 (GRCm39) H226R possibly damaging Het
Cubn G T 2: 13,291,875 (GRCm39) Q3317K probably damaging Het
Cyp17a1 A G 19: 46,659,134 (GRCm39) L169P probably benign Het
Dcc T A 18: 71,507,640 (GRCm39) K911* probably null Het
Dcun1d2 G A 8: 13,328,675 (GRCm39) R75* probably null Het
Defb19 A T 2: 152,421,943 (GRCm39) probably null Het
Dip2c A C 13: 9,664,413 (GRCm39) N942T probably damaging Het
Dnah3 T A 7: 119,565,474 (GRCm39) I169F Het
Dnah3 T C 7: 119,660,183 (GRCm39) M830V probably benign Het
Dnajc5g G A 5: 31,269,009 (GRCm39) S130N possibly damaging Het
Dscaml1 C A 9: 45,613,703 (GRCm39) Q939K possibly damaging Het
Evpl G C 11: 116,117,905 (GRCm39) N761K possibly damaging Het
Fbxw8 A T 5: 118,206,280 (GRCm39) I556N probably damaging Het
Fry G T 5: 150,304,348 (GRCm39) M579I possibly damaging Het
Ggt7 A T 2: 155,337,800 (GRCm39) M488K probably benign Het
Gnpnat1 T A 14: 45,619,038 (GRCm39) H107L probably benign Het
Golga2 C A 2: 32,195,599 (GRCm39) P798Q possibly damaging Het
Gpr35 G A 1: 92,910,929 (GRCm39) A214T probably damaging Het
Greb1 A T 12: 16,759,431 (GRCm39) probably null Het
Hdac10 G A 15: 89,012,487 (GRCm39) T32I probably benign Het
Hkdc1 G A 10: 62,221,478 (GRCm39) T860I probably damaging Het
Icam5 C A 9: 20,946,738 (GRCm39) P422Q possibly damaging Het
Ist1 A C 8: 110,404,159 (GRCm39) S238A probably benign Het
Lrig2 T C 3: 104,404,836 (GRCm39) N91D probably benign Het
Mapt A C 11: 104,218,949 (GRCm39) D352A probably damaging Het
Micall2 G A 5: 139,702,124 (GRCm39) P373L possibly damaging Het
Mocs1 A G 17: 49,761,585 (GRCm39) S560G possibly damaging Het
Mpo A G 11: 87,691,950 (GRCm39) D461G probably damaging Het
Myo1a G T 10: 127,546,309 (GRCm39) V271L probably damaging Het
Ncoa1 G A 12: 4,345,188 (GRCm39) P720S not run Het
Ncr1 T A 7: 4,341,150 (GRCm39) I47N probably damaging Het
Ndufb6 G A 4: 40,277,730 (GRCm39) R66C probably damaging Het
Obox5 A T 7: 15,492,668 (GRCm39) S208C probably damaging Het
Or10q1 T C 19: 13,726,502 (GRCm39) S11P probably damaging Het
Or2n1d A T 17: 38,646,755 (GRCm39) K236* probably null Het
Or5p75-ps1 T A 7: 108,107,611 (GRCm39) F116Y unknown Het
Or7d9 T A 9: 20,197,826 (GRCm39) M285K probably damaging Het
Padi4 A C 4: 140,488,983 (GRCm39) V152G probably damaging Het
Pdzd7 A T 19: 45,025,450 (GRCm39) D348E probably damaging Het
Pdzph1 T A 17: 59,186,154 (GRCm39) K1212N possibly damaging Het
Piezo2 C T 18: 63,160,634 (GRCm39) G2341R probably damaging Het
Plb1 A G 5: 32,511,028 (GRCm39) K1298E probably benign Het
Prr14l A G 5: 32,985,982 (GRCm39) L1171P probably benign Het
Rab11fip5 T C 6: 85,318,850 (GRCm39) T680A probably benign Het
Rev1 A T 1: 38,127,146 (GRCm39) N371K possibly damaging Het
Rsf1 CGGCGGCGG CGGCGGCGGGGGCGGCGG 7: 97,229,133 (GRCm39) probably benign Het
Ryr2 A G 13: 11,799,997 (GRCm39) C917R probably damaging Het
Sall1 A T 8: 89,757,549 (GRCm39) S852T possibly damaging Het
Serpine2 A G 1: 79,779,272 (GRCm39) F296L probably damaging Het
Slc12a6 A T 2: 112,182,887 (GRCm39) N754I probably damaging Het
Slc39a6 A T 18: 24,718,332 (GRCm39) L575Q probably damaging Het
Smarcc2 T A 10: 128,321,475 (GRCm39) L890Q probably damaging Het
Smg5 T A 3: 88,268,378 (GRCm39) V1006D probably damaging Het
Ssh2 T C 11: 77,283,899 (GRCm39) V51A probably damaging Het
St14 T C 9: 31,008,195 (GRCm39) K547E probably benign Het
Stag1 T G 9: 100,678,781 (GRCm39) V234G probably damaging Het
Stag3 A T 5: 138,280,207 (GRCm39) Q24L probably benign Het
Stra6 T C 9: 58,048,380 (GRCm39) Y158H probably damaging Het
Tcstv1a A T 13: 120,355,666 (GRCm39) probably null Het
Tmem196 G A 12: 119,975,002 (GRCm39) C62Y probably damaging Het
Tmem265 T A 7: 127,164,039 (GRCm39) F84L Het
Tph1 C T 7: 46,306,627 (GRCm39) probably null Het
Ttn A G 2: 76,776,834 (GRCm39) I1522T unknown Het
Ulk4 T A 9: 121,084,178 (GRCm39) Q129L probably benign Het
Usp17la T A 7: 104,510,792 (GRCm39) S466T probably benign Het
Vmn2r31 A T 7: 7,387,744 (GRCm39) V609E probably damaging Het
Vmn2r52 C T 7: 9,904,744 (GRCm39) C365Y probably benign Het
Zbtb4 A T 11: 69,666,937 (GRCm39) T81S possibly damaging Het
Zfp605 A T 5: 110,259,885 (GRCm39) probably benign Het
Other mutations in Dffb
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL02502:Dffb APN 4 154,050,073 (GRCm39) unclassified probably benign
R0243:Dffb UTSW 4 154,049,835 (GRCm39) nonsense probably null
R0244:Dffb UTSW 4 154,059,072 (GRCm39) missense probably benign 0.33
R2483:Dffb UTSW 4 154,049,976 (GRCm39) missense probably damaging 1.00
R3622:Dffb UTSW 4 154,049,976 (GRCm39) missense probably damaging 1.00
R3623:Dffb UTSW 4 154,049,976 (GRCm39) missense probably damaging 1.00
R3624:Dffb UTSW 4 154,049,976 (GRCm39) missense probably damaging 1.00
R4562:Dffb UTSW 4 154,049,913 (GRCm39) missense probably damaging 1.00
R4912:Dffb UTSW 4 154,049,864 (GRCm39) unclassified probably benign
R5015:Dffb UTSW 4 154,057,416 (GRCm39) missense possibly damaging 0.84
R5986:Dffb UTSW 4 154,050,050 (GRCm39) missense probably damaging 1.00
R6950:Dffb UTSW 4 154,054,549 (GRCm39) missense probably benign
R7986:Dffb UTSW 4 154,054,504 (GRCm39) missense probably damaging 0.99
R8731:Dffb UTSW 4 154,059,101 (GRCm39) missense possibly damaging 0.93
R8910:Dffb UTSW 4 154,057,416 (GRCm39) missense possibly damaging 0.84
R9709:Dffb UTSW 4 154,059,121 (GRCm39) missense probably damaging 1.00
Z1176:Dffb UTSW 4 154,057,300 (GRCm39) missense probably damaging 1.00
Predicted Primers PCR Primer
(F):5'- CCCTTAGTGGCCAAAATGGG -3'
(R):5'- AGTCAGTTCCTGCAAGCTTG -3'

Sequencing Primer
(F):5'- CTGGTAGGACAGAAGCATCTCTC -3'
(R):5'- CAGTTCCTGCAAGCTTGATGGG -3'
Posted On 2019-09-13