Incidental Mutation 'R4668:Top2b'
ID 352193
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms D230016L12Rik, Top-2
Accession Numbers
Essential gene? Probably essential (E-score: 0.888) question?
Stock # R4668 (G1)
Quality Score 225
Status Not validated
Chromosome 14
Chromosomal Location 16365179-16435462 bp(+) (GRCm38)
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: 98.6%
  • 10x: 97.3%
  • 20x: 95.4%
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: 105 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4921528I07Rik A T 9: 114,304,711 (GRCm38) noncoding transcript Het
6430548M08Rik T C 8: 120,160,414 (GRCm38) probably null Het
Abca4 G A 3: 122,155,299 (GRCm38) G531E possibly damaging Het
Acad8 A G 9: 26,990,627 (GRCm38) L147P probably damaging Het
Acot10 T C 15: 20,665,942 (GRCm38) S238G probably benign Het
Adamtsl2 A T 2: 27,095,475 (GRCm38) H457L probably benign Het
Ankrd35 A T 3: 96,679,208 (GRCm38) T67S probably damaging Het
Aox2 T G 1: 58,334,694 (GRCm38) I838S possibly damaging Het
Arnt2 T C 7: 84,275,386 (GRCm38) N411S probably damaging Het
Bmpr2 T C 1: 59,867,716 (GRCm38) L656S probably damaging Het
Carns1 A T 19: 4,165,476 (GRCm38) Y902* probably null Het
Cavin1 T C 11: 100,958,796 (GRCm38) E336G probably damaging Het
Cbl A T 9: 44,153,848 (GRCm38) C728S probably benign Het
Ccdc136 C A 6: 29,411,281 (GRCm38) Q218K probably damaging Het
Cdk19 C A 10: 40,466,710 (GRCm38) T196K probably damaging Het
Ceacam20 T C 7: 19,986,027 (GRCm38) Y495H probably damaging Het
Celf2 T C 2: 6,721,528 (GRCm38) I47V probably benign Het
Ces3a A C 8: 105,053,423 (GRCm38) K299T probably damaging Het
Cfap61 A T 2: 146,143,136 (GRCm38) I967F probably damaging Het
Cnksr1 C T 4: 134,232,971 (GRCm38) probably benign Het
Cped1 T C 6: 22,237,653 (GRCm38) Y923H probably benign Het
Crip3 T C 17: 46,429,364 (GRCm38) L30P probably damaging Het
Csmd1 A G 8: 16,023,891 (GRCm38) I2030T possibly damaging Het
Ctse C A 1: 131,662,749 (GRCm38) P70T probably damaging Het
Cyp2b23 A G 7: 26,672,734 (GRCm38) F429L probably damaging Het
Cyp2c66 T A 19: 39,176,656 (GRCm38) D360E probably damaging Het
D8Ertd738e A T 8: 84,249,481 (GRCm38) L46* probably null Het
Dcp2 T A 18: 44,415,362 (GRCm38) probably null Het
Ddx10 C A 9: 53,099,213 (GRCm38) D834Y possibly damaging Het
Ddx19a A T 8: 110,979,084 (GRCm38) V245E probably damaging Het
Dpf2 A C 19: 5,904,487 (GRCm38) D130E probably benign Het
Emc8 A T 8: 120,667,779 (GRCm38) M67K probably damaging Het
Ephb6 T C 6: 41,614,602 (GRCm38) L231P possibly damaging Het
Erp27 T C 6: 136,908,152 (GRCm38) E216G possibly damaging Het
Esco1 A T 18: 10,594,734 (GRCm38) I184N possibly damaging Het
Fam205c A G 4: 42,871,608 (GRCm38) F256L probably benign Het
Fdxacb1 T A 9: 50,770,260 (GRCm38) D11E possibly damaging Het
Fhod3 C T 18: 25,066,338 (GRCm38) P689S probably benign Het
Fnip1 T A 11: 54,503,559 (GRCm38) S940R probably damaging Het
Ganc G T 2: 120,431,067 (GRCm38) V343F probably benign Het
Gldn T A 9: 54,332,018 (GRCm38) L228* probably null Het
Gm1123 C T 9: 99,009,373 (GRCm38) R341H probably damaging Het
Gtf2f2 T C 14: 75,917,638 (GRCm38) Y161C probably benign Het
Gtf3c1 T C 7: 125,667,338 (GRCm38) T979A probably damaging Het
Hist1h4a A G 13: 23,760,976 (GRCm38) V61A probably benign Het
Hmcn2 G T 2: 31,435,792 (GRCm38) R4277L probably benign Het
Hsd17b6 T A 10: 127,994,426 (GRCm38) probably null Het
Igkv12-46 T C 6: 69,764,797 (GRCm38) T25A probably damaging Het
Inpp5e G A 2: 26,400,994 (GRCm38) R354C probably damaging Het
Jcad T A 18: 4,680,221 (GRCm38) probably null Het
Kcna10 G T 3: 107,194,694 (GRCm38) A214S possibly damaging Het
Kit T C 5: 75,641,220 (GRCm38) probably null Het
Kmt2a G A 9: 44,824,572 (GRCm38) probably benign Het
Lama1 T C 17: 67,752,434 (GRCm38) V604A probably benign Het
Mesd T C 7: 83,895,756 (GRCm38) V138A probably damaging Het
Mmp13 T C 9: 7,272,580 (GRCm38) F9S possibly damaging Het
Mocos T C 18: 24,666,434 (GRCm38) Y242H probably benign Het
Mrc1 A C 2: 14,293,486 (GRCm38) T718P probably damaging Het
Msh6 T C 17: 87,984,806 (GRCm38) S330P possibly damaging Het
Myh10 A G 11: 68,804,642 (GRCm38) K1532E probably damaging Het
Nat9 T C 11: 115,184,542 (GRCm38) N91S probably damaging Het
Neto2 A T 8: 85,641,062 (GRCm38) I351N probably damaging Het
Nfx1 A G 4: 40,976,367 (GRCm38) N14D possibly damaging Het
Nlrp4b A G 7: 10,714,733 (GRCm38) T288A possibly damaging Het
Nutm2 C A 13: 50,472,997 (GRCm38) T396K probably benign Het
Ogdhl A G 14: 32,332,536 (GRCm38) T196A probably benign Het
Olfr1453 A T 19: 13,028,081 (GRCm38) F83I probably benign Het
Olfr548-ps1 A G 7: 102,542,604 (GRCm38) I223V possibly damaging Het
Olfr582 A T 7: 103,041,851 (GRCm38) D119V probably benign Het
Omg T A 11: 79,502,423 (GRCm38) N203I probably damaging Het
Pdgfrb A G 18: 61,064,113 (GRCm38) Y207C probably damaging Het
Pdzd7 T A 19: 45,045,687 (GRCm38) probably benign Het
Pgs1 C A 11: 118,003,507 (GRCm38) H157N probably damaging Het
Pik3c2a A G 7: 116,358,688 (GRCm38) V1121A probably benign Het
Pikfyve T A 1: 65,250,273 (GRCm38) C1235S probably damaging Het
Pms1 G A 1: 53,189,474 (GRCm38) Q872* probably null Het
Ptgs2 A G 1: 150,101,084 (GRCm38) T23A probably benign Het
Rgl1 T G 1: 152,521,371 (GRCm38) R716S probably damaging Het
Rif1 A G 2: 52,111,952 (GRCm38) E1806G probably benign Het
Ripor1 T C 8: 105,614,652 (GRCm38) V39A probably benign Het
Ryr2 G T 13: 11,593,117 (GRCm38) T868N probably benign Het
Sec22b A T 3: 97,921,122 (GRCm38) D167V probably damaging Het
Sec24d T C 3: 123,355,774 (GRCm38) V810A probably damaging Het
Shh T C 5: 28,457,855 (GRCm38) *438W probably null Het
Slc25a12 G A 2: 71,315,062 (GRCm38) S178L probably benign Het
Sorl1 A T 9: 41,984,508 (GRCm38) W1784R probably damaging Het
Sp3 A T 2: 72,970,981 (GRCm38) S229R probably damaging Het
Spdye4c G A 2: 128,592,353 (GRCm38) V5I possibly damaging Het
Spint2 A T 7: 29,260,379 (GRCm38) V53D probably damaging Het
Stard3nl T A 13: 19,376,519 (GRCm38) N29Y probably damaging Het
Stk25 A G 1: 93,625,483 (GRCm38) S299P probably damaging Het
Sult2a3 A G 7: 14,122,861 (GRCm38) S45P probably damaging Het
Thsd7a A T 6: 12,408,968 (GRCm38) V685E probably damaging Het
Tm9sf4 T A 2: 153,187,308 (GRCm38) V92D probably damaging Het
Topors G A 4: 40,262,669 (GRCm38) T205I probably damaging Het
Tpo T A 12: 30,103,290 (GRCm38) Y355F probably benign Het
Uba1y T A Y: 826,032 (GRCm38) M396K possibly damaging Het
Vmn1r50 A T 6: 90,107,531 (GRCm38) Q86L probably benign Het
Vmn1r77 A G 7: 12,041,431 (GRCm38) K45E probably damaging Het
Vmn2r114 A C 17: 23,310,473 (GRCm38) N218K possibly damaging Het
Vmn2r66 T A 7: 84,994,697 (GRCm38) N835I probably damaging Het
Vps54 T G 11: 21,299,989 (GRCm38) N458K probably benign Het
Zcchc7 G T 4: 44,895,964 (GRCm38) C304F probably damaging Het
Zfp335 A T 2: 164,900,286 (GRCm38) C593S probably damaging Het
Zmynd15 C G 11: 70,462,588 (GRCm38) P214R 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
R4667: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'- ATTTGAAGTACTCTCCCTGAGC -3'

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