Incidental Mutation 'R4667:Top2b'
ID 352080
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms Top-2, D230016L12Rik
MMRRC Submission 042012-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.924) question?
Stock # R4667 (G1)
Quality Score 225
Status Not validated
Chromosome 14
Chromosomal Location 6038976-6104585 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) T to G at 16409189 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Isoleucine to Methionine at position 777 (I777M)
Ref Sequence ENSEMBL: ENSMUSP00000017629 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000017629] [ENSMUST00000161693]
AlphaFold Q64511
Predicted Effect probably damaging
Transcript: ENSMUST00000017629
AA Change: I777M

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000017629
Gene: ENSMUSG00000017485
AA Change: I777M

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
Meta Mutation Damage Score 0.8018 question?
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.5%
  • 10x: 97.1%
  • 20x: 95.1%
Validation Efficiency
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: 109 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Acad8 A G 9: 26,901,923 (GRCm39) L147P probably damaging Het
Adgra3 T A 5: 50,136,298 (GRCm39) Y729F possibly damaging Het
Ago2 A G 15: 73,018,265 (GRCm39) Y58H probably damaging Het
Akap13 A G 7: 75,378,842 (GRCm39) T2128A probably damaging Het
Ankhd1 C A 18: 36,781,074 (GRCm39) P2042Q possibly damaging Het
Arhgef15 T C 11: 68,845,387 (GRCm39) K155R probably benign Het
Atp10b T C 11: 43,138,345 (GRCm39) F1209L probably damaging Het
B130006D01Rik A T 11: 95,617,335 (GRCm39) probably benign Het
Bmpr2 T C 1: 59,906,875 (GRCm39) L656S probably damaging Het
Bnip5 G T 17: 29,127,287 (GRCm39) Q241K possibly damaging Het
Btbd17 A G 11: 114,684,683 (GRCm39) F119L possibly damaging Het
Ccdc191 G T 16: 43,751,646 (GRCm39) K267N probably damaging Het
Cd200l1 A G 16: 45,264,526 (GRCm39) S11P probably benign Het
Ceacam20 T C 7: 19,719,952 (GRCm39) Y495H probably damaging Het
Celf2 T C 2: 6,726,339 (GRCm39) I47V probably benign Het
Cemip2 G A 19: 21,774,715 (GRCm39) R119H probably benign Het
Cemip2 C T 19: 21,822,145 (GRCm39) A1180V probably benign Het
Chd9 T C 8: 91,760,428 (GRCm39) S2058P possibly damaging Het
Clcn6 T C 4: 148,108,624 (GRCm39) E135G possibly damaging Het
Cntn1 T A 15: 92,192,960 (GRCm39) N687K probably damaging Het
Col1a2 A T 6: 4,512,412 (GRCm39) M99L unknown Het
Cpeb2 T C 5: 43,391,235 (GRCm39) probably benign Het
Csn1s2b A G 5: 87,970,170 (GRCm39) T134A possibly damaging Het
Cst13 A T 2: 148,665,001 (GRCm39) probably benign Het
Cyp2c66 T A 19: 39,165,100 (GRCm39) D360E probably damaging Het
Dhx8 A G 11: 101,628,987 (GRCm39) S179G unknown Het
Dip2b A G 15: 100,049,241 (GRCm39) I212V probably benign Het
Dnah9 G A 11: 66,046,357 (GRCm39) H64Y probably benign Het
Dnal1 T C 12: 84,183,474 (GRCm39) probably benign Het
Dse T G 10: 34,029,008 (GRCm39) Y694S probably damaging Het
Dync2h1 T C 9: 7,051,411 (GRCm39) I3175V probably benign Het
Elf5 A G 2: 103,279,405 (GRCm39) N209D probably damaging Het
Elovl1 A G 4: 118,287,984 (GRCm39) Y40C probably damaging Het
Erp27 T C 6: 136,885,150 (GRCm39) E216G possibly damaging Het
F5 G A 1: 164,001,755 (GRCm39) V153I probably benign Het
Fam186a G A 15: 99,842,413 (GRCm39) T1277I possibly damaging Het
Fam90a1a A T 8: 22,453,362 (GRCm39) H239L possibly damaging Het
Fchsd2 G T 7: 100,899,656 (GRCm39) R334L probably damaging Het
Fermt3 T C 19: 6,980,288 (GRCm39) Y369C probably damaging Het
Fhod3 C T 18: 25,199,395 (GRCm39) P689S probably benign Het
Fnbp1l G T 3: 122,350,216 (GRCm39) Q332K probably benign Het
Frem3 T C 8: 81,390,049 (GRCm39) S1767P probably damaging Het
Ggt5 T C 10: 75,438,865 (GRCm39) L121P probably damaging Het
Gphn T C 12: 78,501,591 (GRCm39) S119P probably damaging Het
Herc2 A G 7: 55,781,001 (GRCm39) D1222G probably damaging Het
Hmx3 T C 7: 131,146,111 (GRCm39) I273T possibly damaging Het
Hnrnpu A G 1: 178,159,746 (GRCm39) probably benign Het
Hspg2 C T 4: 137,266,956 (GRCm39) T1987I possibly damaging Het
Ighv1-22 T A 12: 114,710,071 (GRCm39) Q58L probably damaging Het
Ighv14-3 T A 12: 114,023,875 (GRCm39) I7F probably benign Het
Kcns3 C A 12: 11,141,784 (GRCm39) R305L probably damaging Het
Kcnu1 C T 8: 26,400,949 (GRCm39) A699V possibly damaging Het
Kif22 A C 7: 126,632,500 (GRCm39) L270W probably damaging Het
Lrp2 G T 2: 69,319,642 (GRCm39) H1960Q probably benign Het
Marchf7 C T 2: 60,071,394 (GRCm39) Q94* probably null Het
Mcoln3 A T 3: 145,836,959 (GRCm39) I264F probably benign Het
Mdn1 A C 4: 32,679,572 (GRCm39) T706P probably damaging Het
Mfsd2b A G 12: 4,917,636 (GRCm39) C137R probably benign Het
Mmp25 A G 17: 23,863,581 (GRCm39) V83A probably benign Het
Mocos T C 18: 24,799,491 (GRCm39) Y242H probably benign Het
Msh6 T C 17: 88,292,234 (GRCm39) S330P possibly damaging Het
Mtus2 T C 5: 148,235,070 (GRCm39) S1156P possibly damaging Het
Muc5b G A 7: 141,396,116 (GRCm39) R124H unknown Het
Mybbp1a G A 11: 72,338,797 (GRCm39) E775K possibly damaging Het
Myo10 A G 15: 25,793,239 (GRCm39) E1272G possibly damaging Het
Nars1 A G 18: 64,638,302 (GRCm39) S254P possibly damaging Het
Ncapd2 A G 6: 125,161,481 (GRCm39) I211T possibly damaging Het
Ncoa7 A T 10: 30,566,786 (GRCm39) W582R probably damaging Het
Npr3 T A 15: 11,905,553 (GRCm39) D58V possibly damaging Het
Nr3c1 G T 18: 39,561,780 (GRCm39) T430K probably benign Het
Odf2l A G 3: 144,833,801 (GRCm39) T111A probably benign Het
Ogdh G T 11: 6,290,600 (GRCm39) C406F probably benign Het
Olfml2a T G 2: 38,839,022 (GRCm39) S190A probably damaging Het
Optn T C 2: 5,037,950 (GRCm39) K415E probably benign Het
Or10n1 T C 9: 39,525,034 (GRCm39) M57T probably damaging Het
Or52a20 A G 7: 103,365,845 (GRCm39) T15A probably benign Het
Or8b12i T C 9: 20,082,394 (GRCm39) I158V probably benign Het
Or8g52 G T 9: 39,631,005 (GRCm39) V161F probably benign Het
Pakap A T 4: 57,855,655 (GRCm39) D328V possibly damaging Het
Perm1 C A 4: 156,304,663 (GRCm39) S803* probably null Het
Pex14 T C 4: 149,068,542 (GRCm39) T84A probably benign Het
Pih1d2 T A 9: 50,532,252 (GRCm39) Y103* probably null Het
Pikfyve T A 1: 65,289,432 (GRCm39) C1235S probably damaging Het
Polr1a A G 6: 71,894,805 (GRCm39) N171S probably benign Het
Prrx1 A G 1: 163,081,616 (GRCm39) S201P probably benign Het
Psme2b A T 11: 48,836,493 (GRCm39) N151K probably benign Het
Serpinb5 A T 1: 106,800,025 (GRCm39) T72S probably benign Het
Sgsm1 A G 5: 113,407,913 (GRCm39) probably null Het
Sipa1l2 T C 8: 126,180,209 (GRCm39) R1063G possibly damaging Het
Slc19a3 T C 1: 83,000,520 (GRCm39) T166A probably benign Het
Slc5a4b T C 10: 75,910,879 (GRCm39) Y319C possibly damaging Het
Stard3nl T A 13: 19,560,689 (GRCm39) N29Y probably damaging Het
Sult6b2 G T 6: 142,747,421 (GRCm39) C109* probably null Het
Tcf25 A G 8: 124,123,764 (GRCm39) E467G possibly damaging Het
Tmem177 A T 1: 119,837,950 (GRCm39) V243D probably benign Het
Tspan11 T A 6: 127,920,678 (GRCm39) C208* probably null Het
Ttc1 A G 11: 43,636,144 (GRCm39) V33A probably benign Het
Tut4 G A 4: 108,352,356 (GRCm39) E357K probably damaging Het
Uck1 T A 2: 32,146,046 (GRCm39) H283L probably damaging Het
Utrn A C 10: 12,573,797 (GRCm39) V1091G probably benign Het
Vmn1r11 A T 6: 57,114,483 (GRCm39) H49L probably damaging Het
Vmn1r160 G T 7: 22,571,478 (GRCm39) S277I probably benign Het
Vmn1r18 A T 6: 57,367,069 (GRCm39) S162T probably benign Het
Vps37b A G 5: 124,148,795 (GRCm39) L80P probably damaging Het
Wfdc3 T C 2: 164,585,006 (GRCm39) M1V probably null Het
Wrn A T 8: 33,814,366 (GRCm39) N116K probably benign Het
Wscd2 G T 5: 113,715,333 (GRCm39) G391V probably damaging Het
Zfp286 A G 11: 62,671,428 (GRCm39) V215A probably benign Het
Zfp568 A G 7: 29,722,702 (GRCm39) H549R probably damaging 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
R0390:Top2b UTSW 14 16,418,442 (GRCm38) missense probably benign 0.00
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
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'- GCACTGAAGATGGGATCAACTG -3'
(R):5'- TTTGAAGTACTCTCCCTGAGC -3'

Sequencing Primer
(F):5'- CTGAAGATGGGATCAACTGAGAACTG -3'
(R):5'- TCTCCCTGAGCAGAAAAACTAAATG -3'
Posted On 2015-10-08