Incidental Mutation 'R0390:Top2b'
ID 31636
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms Top-2, D230016L12Rik
MMRRC Submission 038596-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.924) question?
Stock # R0390 (G1)
Quality Score 225
Status Validated
Chromosome 14
Chromosomal Location 6038976-6104585 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to G at 16418442 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Threonine to Alanine at position 1221 (T1221A)
Ref Sequence ENSEMBL: ENSMUSP00000017629 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000017629] [ENSMUST00000161693]
AlphaFold Q64511
Predicted Effect probably benign
Transcript: ENSMUST00000017629
AA Change: T1221A

PolyPhen 2 Score 0.001 (Sensitivity: 0.99; Specificity: 0.15)
SMART Domains Protein: ENSMUSP00000017629
Gene: ENSMUSG00000017485
AA Change: T1221A

DomainStartEndE-ValueType
Blast:TOP2c 32 70 7e-10 BLAST
HATPase_c 85 234 1.91e-2 SMART
TOP2c 89 679 N/A SMART
TOP4c 702 1175 2.55e-230 SMART
low complexity region 1201 1215 N/A INTRINSIC
low complexity region 1287 1299 N/A INTRINSIC
low complexity region 1324 1336 N/A INTRINSIC
low complexity region 1360 1382 N/A INTRINSIC
Pfam:DTHCT 1495 1597 4.6e-31 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000159302
SMART Domains Protein: ENSMUSP00000123789
Gene: ENSMUSG00000017485

DomainStartEndE-ValueType
TOP4c 1 177 4.06e-6 SMART
Predicted Effect probably benign
Transcript: ENSMUST00000160501
SMART Domains Protein: ENSMUSP00000124889
Gene: ENSMUSG00000017485

DomainStartEndE-ValueType
TOP4c 2 222 3.97e-12 SMART
Predicted Effect probably benign
Transcript: ENSMUST00000161693
SMART Domains Protein: ENSMUSP00000123992
Gene: ENSMUSG00000017485

DomainStartEndE-ValueType
Pfam:DNA_topoisoIV 1 117 1.2e-12 PFAM
low complexity region 161 173 N/A INTRINSIC
low complexity region 198 210 N/A INTRINSIC
low complexity region 234 256 N/A INTRINSIC
Predicted Effect noncoding transcript
Transcript: ENSMUST00000163032
Predicted Effect noncoding transcript
Transcript: ENSMUST00000224695
Meta Mutation Damage Score 0.0928 question?
Coding Region Coverage
  • 1x: 99.1%
  • 3x: 98.1%
  • 10x: 95.9%
  • 20x: 92.0%
Validation Efficiency 98% (110/112)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a DNA topoisomerase, an enzyme that controls and alters the topologic states of DNA during transcription. This nuclear enzyme is involved in processes such as chromosome condensation, chromatid separation, and the relief of torsional stress that occurs during DNA transcription and replication. It catalyzes the transient breaking and rejoining of two strands of duplex DNA which allows the strands to pass through one another, thus altering the topology of DNA. Two forms of this enzyme exist as likely products of a gene duplication event. The gene encoding this form, beta, is localized to chromosome 3 and the alpha form is localized to chromosome 17. The gene encoding this enzyme functions as the target for several anticancer agents and a variety of mutations in this gene have been associated with the development of drug resistance. Reduced activity of this enzyme may also play a role in ataxia-telangiectasia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2016]
PHENOTYPE: Homozygous null mice exhibit abnormal innervation. Offspring die shortly after birth due to respiratory failure. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 110 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Adam18 C T 8: 25,164,070 (GRCm39) G38R probably benign Het
Ap2m1 T C 16: 20,359,849 (GRCm39) M183T probably damaging Het
Apob A T 12: 8,038,678 (GRCm39) I364F probably damaging Het
Arl6 A T 16: 59,442,784 (GRCm39) probably benign Het
Cand2 A G 6: 115,751,614 (GRCm39) M15V possibly damaging Het
Cbl A G 9: 44,112,302 (GRCm39) F131S probably damaging Het
Ccdc74a A G 16: 17,468,340 (GRCm39) S321G probably benign Het
Cdc14b T C 13: 64,358,006 (GRCm39) probably benign Het
Cep152 T C 2: 125,418,789 (GRCm39) probably benign Het
Cep290 A G 10: 100,344,620 (GRCm39) E479G probably benign Het
Chrm2 T G 6: 36,501,046 (GRCm39) I301R probably benign Het
Clec2e A G 6: 129,070,431 (GRCm39) W197R probably damaging Het
Cnot10 G T 9: 114,458,218 (GRCm39) S96* probably null Het
Col19a1 A G 1: 24,328,736 (GRCm39) probably benign Het
Csmd2 T C 4: 128,027,466 (GRCm39) probably benign Het
Cthrc1 A T 15: 38,950,159 (GRCm39) *172L probably null Het
Cul9 A T 17: 46,839,515 (GRCm39) I821N probably benign Het
Daam1 G C 12: 72,022,078 (GRCm39) probably benign Het
Dhx58 A T 11: 100,590,090 (GRCm39) I398N probably damaging Het
Dip2b T A 15: 100,091,794 (GRCm39) H844Q probably damaging Het
Dmac2 A G 7: 25,320,454 (GRCm39) D50G probably damaging Het
Dmxl1 C A 18: 50,012,429 (GRCm39) Q1529K probably benign Het
Dtna C T 18: 23,730,558 (GRCm39) P315L probably damaging Het
Ep300 T C 15: 81,524,317 (GRCm39) S1382P unknown Het
Fat2 A T 11: 55,201,603 (GRCm39) N490K probably damaging Het
Flg2 T A 3: 93,107,662 (GRCm39) probably benign Het
Gpatch1 T C 7: 34,980,806 (GRCm39) probably benign Het
Grin2a C A 16: 9,397,449 (GRCm39) K879N possibly damaging Het
Hacd3 A C 9: 64,908,304 (GRCm39) I164S possibly damaging Het
Hinfp A C 9: 44,210,245 (GRCm39) C197G probably damaging Het
Hsd17b12 T C 2: 93,945,335 (GRCm39) probably benign Het
Hsd3b1 A T 3: 98,760,355 (GRCm39) L212Q probably damaging Het
Ifrd1 C T 12: 40,264,093 (GRCm39) probably null Het
Igf2bp2 A G 16: 21,900,551 (GRCm39) F129L possibly damaging Het
Kirrel3 T A 9: 34,931,459 (GRCm39) I409N probably damaging Het
Klhdc10 T C 6: 30,447,411 (GRCm39) I204T probably damaging Het
Kpna6 A T 4: 129,551,597 (GRCm39) S65R possibly damaging Het
Lama3 A T 18: 12,540,620 (GRCm39) D308V probably benign Het
Larp4b T A 13: 9,208,143 (GRCm39) probably null Het
Lgr6 C T 1: 134,921,748 (GRCm39) A199T probably damaging Het
Lyzl1 A T 18: 4,169,175 (GRCm39) T11S probably benign Het
Man1c1 A G 4: 134,305,626 (GRCm39) L366P probably damaging Het
Mef2a A G 7: 66,901,472 (GRCm39) M100T probably damaging Het
Mettl13 G A 1: 162,366,458 (GRCm39) H474Y possibly damaging Het
Minar2 T A 18: 59,208,760 (GRCm39) V136E probably damaging Het
Mmp3 A G 9: 7,451,320 (GRCm39) D352G probably benign Het
Mns1 T C 9: 72,360,086 (GRCm39) I412T probably damaging Het
Mon2 T C 10: 122,842,926 (GRCm39) D1501G probably null Het
Mylk G T 16: 34,695,990 (GRCm39) G242W probably damaging Het
Nav1 T C 1: 135,377,704 (GRCm39) D1715G possibly damaging Het
Nckap1l T C 15: 103,362,310 (GRCm39) S2P probably damaging Het
Nek3 A T 8: 22,618,745 (GRCm39) probably benign Het
Nfrkb A G 9: 31,300,193 (GRCm39) probably benign Het
Nlrp4d T C 7: 10,122,705 (GRCm39) D53G probably benign Het
Nol8 T C 13: 49,815,628 (GRCm39) S561P probably damaging Het
Nuf2 A C 1: 169,352,866 (GRCm39) probably benign Het
Odad3 T A 9: 21,903,004 (GRCm39) H442L probably benign Het
Ofcc1 T A 13: 40,168,789 (GRCm39) D866V possibly damaging Het
Optn A G 2: 5,051,006 (GRCm39) L125P probably benign Het
Or5k3 A G 16: 58,969,662 (GRCm39) I150V probably benign Het
Otoa T A 7: 120,730,564 (GRCm39) F588Y probably benign Het
Pappa T A 4: 65,269,850 (GRCm39) probably null Het
Pde5a T G 3: 122,629,232 (GRCm39) C635W probably damaging Het
Pdgfb A T 15: 79,887,620 (GRCm39) probably null Het
Pih1d2 T A 9: 50,532,346 (GRCm39) C135S probably damaging Het
Plcg1 G T 2: 160,594,286 (GRCm39) C361F probably damaging Het
Ppp4r4 T C 12: 103,567,619 (GRCm39) probably benign Het
Pramel26 T A 4: 143,538,269 (GRCm39) D234V probably benign Het
Prdm10 G A 9: 31,260,564 (GRCm39) probably null Het
Prex2 T A 1: 11,159,930 (GRCm39) probably null Het
Prss56 T G 1: 87,112,452 (GRCm39) probably null Het
Prtg A G 9: 72,752,240 (GRCm39) K209E probably benign Het
Ptprc G A 1: 138,050,313 (GRCm39) T36I possibly damaging Het
Rasgrp4 A G 7: 28,845,285 (GRCm39) Y302C probably damaging Het
Rb1cc1 T A 1: 6,318,858 (GRCm39) M759K probably damaging Het
Rbm15b T A 9: 106,763,197 (GRCm39) M324L probably benign Het
Rcbtb2 T C 14: 73,415,987 (GRCm39) V500A probably damaging Het
Rgs6 A G 12: 83,180,451 (GRCm39) K434R probably damaging Het
Rims1 C T 1: 22,635,607 (GRCm39) A125T possibly damaging Het
Robo3 A G 9: 37,333,473 (GRCm39) V746A probably benign Het
Rtl1 C T 12: 109,557,820 (GRCm39) E1340K unknown Het
Sacs G A 14: 61,443,089 (GRCm39) D1712N possibly damaging Het
Samd4b G A 7: 28,103,402 (GRCm39) P19S probably benign Het
Samhd1 T C 2: 156,956,151 (GRCm39) Y347C probably damaging Het
Sema6d T A 2: 124,500,410 (GRCm39) I393N probably damaging Het
Sigmar1 C T 4: 41,741,243 (GRCm39) A4T probably benign Het
Skint9 C A 4: 112,246,376 (GRCm39) L245F probably benign Het
Slc35f5 T C 1: 125,512,832 (GRCm39) L372P probably damaging Het
Smc1b A T 15: 84,950,478 (GRCm39) I1182N probably damaging Het
Smyd3 A G 1: 178,785,138 (GRCm39) probably benign Het
Sptlc1 T C 13: 53,491,648 (GRCm39) D417G probably benign Het
Sv2c T C 13: 96,225,216 (GRCm39) N31S probably benign Het
Tjp1 T C 7: 64,964,738 (GRCm39) D811G probably damaging Het
Tph2 T C 10: 115,010,014 (GRCm39) D182G probably damaging Het
Traf6 C T 2: 101,518,933 (GRCm39) Q141* probably null Het
Ttn T C 2: 76,587,275 (GRCm39) D21574G probably damaging Het
Uba2 T A 7: 33,850,446 (GRCm39) N367I probably benign Het
Ube2b T C 11: 51,879,429 (GRCm39) probably benign Het
Ubr5 G T 15: 38,030,916 (GRCm39) L426I probably benign Het
Ugt2a2 T A 5: 87,612,007 (GRCm39) H301L probably benign Het
Upf2 T A 2: 6,023,705 (GRCm39) probably benign Het
Utrn T C 10: 12,585,804 (GRCm39) D991G probably benign Het
Vmn2r25 T C 6: 123,800,140 (GRCm39) D734G probably damaging Het
Vmn2r68 C G 7: 84,882,466 (GRCm39) probably null Het
Vmn2r68 T A 7: 84,882,457 (GRCm39) probably benign Het
Vwf T A 6: 125,603,324 (GRCm39) Y891* probably null Het
Wwox C T 8: 115,433,018 (GRCm39) T228I probably benign Het
Zer1 C T 2: 29,998,225 (GRCm39) probably benign Het
Zfp180 C T 7: 23,804,132 (GRCm39) H184Y possibly damaging Het
Zfp68 A T 5: 138,605,487 (GRCm39) Y279N probably benign Het
Other mutations in Top2b
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00430:Top2b APN 14 16,422,692 (GRCm38) missense probably benign 0.00
IGL00730:Top2b APN 14 16,389,831 (GRCm38) missense probably damaging 1.00
IGL00917:Top2b APN 14 16,407,354 (GRCm38) missense probably benign 0.05
IGL01959:Top2b APN 14 16,422,695 (GRCm38) missense probably benign 0.19
IGL02019:Top2b APN 14 16,409,965 (GRCm38) missense probably benign 0.44
IGL02119:Top2b APN 14 16,406,733 (GRCm38) missense probably damaging 1.00
IGL02136:Top2b APN 14 16,407,103 (GRCm38) unclassified probably benign
IGL02148:Top2b APN 14 16,400,488 (GRCm38) missense probably damaging 1.00
IGL02496:Top2b APN 14 16,387,335 (GRCm38) missense probably benign
IGL02503:Top2b APN 14 16,407,163 (GRCm38) missense possibly damaging 0.92
IGL02672:Top2b APN 14 16,409,166 (GRCm38) unclassified probably benign
IGL02721:Top2b APN 14 16,409,236 (GRCm38) missense probably damaging 1.00
IGL02886:Top2b APN 14 16,365,688 (GRCm38) missense possibly damaging 0.73
IGL03252:Top2b APN 14 16,393,163 (GRCm38) missense possibly damaging 0.60
PIT4434001:Top2b UTSW 14 16,423,780 (GRCm38) critical splice donor site probably null
R0092:Top2b UTSW 14 16,409,263 (GRCm38) missense probably damaging 1.00
R0201:Top2b UTSW 14 16,383,174 (GRCm38) missense probably damaging 1.00
R0394:Top2b UTSW 14 16,413,556 (GRCm38) splice site probably null
R1159:Top2b UTSW 14 16,430,329 (GRCm38) missense possibly damaging 0.81
R1424:Top2b UTSW 14 16,383,177 (GRCm38) missense probably damaging 1.00
R1519:Top2b UTSW 14 16,408,953 (GRCm38) splice site probably null
R1561:Top2b UTSW 14 16,398,993 (GRCm38) missense possibly damaging 0.80
R1713:Top2b UTSW 14 16,409,823 (GRCm38) missense probably benign 0.05
R1987:Top2b UTSW 14 16,398,916 (GRCm38) missense probably damaging 0.99
R2219:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R2287:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R2422:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R2679:Top2b UTSW 14 16,413,947 (GRCm38) missense probably damaging 1.00
R3687:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3707:Top2b UTSW 14 16,388,447 (GRCm38) missense probably damaging 1.00
R3810:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3812:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3815:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3816:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R3818:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4023:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4025:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4026:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4133:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4157:Top2b UTSW 14 16,384,491 (GRCm38) missense probably benign 0.42
R4179:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4180:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4300:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4376:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4377:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4492:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4549:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4550:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4581:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4582:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4628:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4630:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4667:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4668:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4669:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R4698:Top2b UTSW 14 16,387,331 (GRCm38) nonsense probably null
R4769:Top2b UTSW 14 16,398,991 (GRCm38) missense probably damaging 1.00
R4809:Top2b UTSW 14 16,383,125 (GRCm38) missense probably benign 0.06
R4899:Top2b UTSW 14 16,387,313 (GRCm38) missense probably damaging 1.00
R5035:Top2b UTSW 14 16,409,966 (GRCm38) missense probably benign 0.01
R5621:Top2b UTSW 14 16,387,280 (GRCm38) missense probably damaging 1.00
R5631:Top2b UTSW 14 16,409,882 (GRCm38) missense probably damaging 1.00
R5685:Top2b UTSW 14 16,413,666 (GRCm38) missense probably damaging 1.00
R5732:Top2b UTSW 14 16,400,106 (GRCm38) missense possibly damaging 0.92
R5939:Top2b UTSW 14 16,422,786 (GRCm38) missense probably damaging 0.96
R6007:Top2b UTSW 14 16,423,779 (GRCm38) critical splice donor site probably null
R6087:Top2b UTSW 14 16,409,864 (GRCm38) missense probably benign 0.14
R6144:Top2b UTSW 14 16,423,740 (GRCm38) missense possibly damaging 0.48
R6196:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R6218:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R6229:Top2b UTSW 14 16,409,838 (GRCm38) missense probably damaging 1.00
R6249:Top2b UTSW 14 16,399,006 (GRCm38) missense probably damaging 1.00
R6337:Top2b UTSW 14 16,399,026 (GRCm38) missense possibly damaging 0.77
R6353:Top2b UTSW 14 16,416,671 (GRCm38) missense probably damaging 1.00
R6512:Top2b UTSW 14 16,409,854 (GRCm38) missense possibly damaging 0.94
R6573:Top2b UTSW 14 16,398,991 (GRCm38) missense probably damaging 1.00
R6614:Top2b UTSW 14 16,407,142 (GRCm38) nonsense probably null
R6844:Top2b UTSW 14 16,429,383 (GRCm38) missense possibly damaging 0.94
R6848:Top2b UTSW 14 16,409,958 (GRCm38) missense possibly damaging 0.89
R6871:Top2b UTSW 14 16,409,189 (GRCm38) missense probably damaging 1.00
R6895:Top2b UTSW 14 16,413,604 (GRCm38) missense probably benign 0.06
R7162:Top2b UTSW 14 16,416,653 (GRCm38) missense probably benign 0.00
R7247:Top2b UTSW 14 16,416,962 (GRCm38) missense probably benign 0.08
R7250:Top2b UTSW 14 16,420,411 (GRCm38) missense probably benign
R7359:Top2b UTSW 14 16,407,376 (GRCm38) missense probably null 1.00
R7365:Top2b UTSW 14 16,416,649 (GRCm38) missense probably benign 0.04
R7493:Top2b UTSW 14 16,416,605 (GRCm38) missense probably benign 0.00
R7528:Top2b UTSW 14 16,395,427 (GRCm38) nonsense probably null
R7562:Top2b UTSW 14 16,412,946 (GRCm38) missense probably benign 0.04
R7594:Top2b UTSW 14 16,428,587 (GRCm38) missense probably benign
R7670:Top2b UTSW 14 16,416,620 (GRCm38) missense possibly damaging 0.61
R7894:Top2b UTSW 14 16,413,081 (GRCm38) missense possibly damaging 0.68
R8031:Top2b UTSW 14 16,412,986 (GRCm38) missense probably damaging 0.98
R8150:Top2b UTSW 14 16,393,291 (GRCm38) missense probably damaging 0.99
R8214:Top2b UTSW 14 16,383,177 (GRCm38) missense probably damaging 1.00
R8299:Top2b UTSW 14 16,386,123 (GRCm38) missense possibly damaging 0.68
R8977:Top2b UTSW 14 16,393,239 (GRCm38) missense probably benign 0.36
R9562:Top2b UTSW 14 16,365,718 (GRCm38) missense probably benign 0.09
R9565:Top2b UTSW 14 16,365,718 (GRCm38) missense probably benign 0.09
R9798:Top2b UTSW 14 16,389,845 (GRCm38) missense probably damaging 1.00
X0028:Top2b UTSW 14 16,384,499 (GRCm38) nonsense probably null
Z1176:Top2b UTSW 14 16,395,434 (GRCm38) missense probably damaging 1.00
Z1177:Top2b UTSW 14 16,416,953 (GRCm38) missense probably benign
Predicted Primers PCR Primer
(F):5'- GGTCTCAGATGATAGCAAGTGGTCCC -3'
(R):5'- GGTGGCAACAACCTGAACTAAATAAGC -3'

Sequencing Primer
(F):5'- GATAGCAAGTGGTCCCATCCC -3'
(R):5'- aacaacctgaactaaataAGCAGCTC -3'
Posted On 2013-04-24