Incidental Mutation 'R4899:Top2b'
ID 376035
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms Top-2, D230016L12Rik
MMRRC Submission 042503-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.929) question?
Stock # R4899 (G1)
Quality Score 225
Status Not validated
Chromosome 14
Chromosomal Location 6038976-6104585 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to T at 16387313 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Isoleucine to Phenylalanine at position 134 (I134F)
Ref Sequence ENSEMBL: ENSMUSP00000017629 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000017629]
AlphaFold Q64511
Predicted Effect probably damaging
Transcript: ENSMUST00000017629
AA Change: I134F

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000017629
Gene: ENSMUSG00000017485
AA Change: I134F

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: ENSMUST00000159987
Coding Region Coverage
  • 1x: 99.1%
  • 3x: 98.4%
  • 10x: 96.7%
  • 20x: 93.7%
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: 75 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Abhd18 C G 3: 40,860,304 (GRCm39) probably null Het
Adra2c A T 5: 35,437,705 (GRCm39) Y159F probably damaging Het
Alkal2 T A 12: 30,934,972 (GRCm39) S64T probably benign Het
Apbb1ip T C 2: 22,713,361 (GRCm39) V72A unknown Het
Atp13a5 A G 16: 29,197,318 (GRCm39) L13P probably damaging Het
Azin2 G A 4: 128,828,446 (GRCm39) P254S probably benign Het
Bmpr1b T C 3: 141,546,444 (GRCm39) R481G probably damaging Het
Cacna2d4 G A 6: 119,245,157 (GRCm39) W288* probably null Het
Cass4 A G 2: 172,269,789 (GRCm39) T626A probably benign Het
Cep112 T A 11: 108,497,110 (GRCm39) D683E probably damaging Het
Cfap300 A T 9: 8,022,494 (GRCm39) S243T possibly damaging Het
Chat G T 14: 32,170,934 (GRCm39) S188R possibly damaging Het
Cit A G 5: 116,001,087 (GRCm39) Y162C possibly damaging Het
Clca3a1 T A 3: 144,443,722 (GRCm39) Y676F probably damaging Het
Clec2h A G 6: 128,652,787 (GRCm39) N185D probably benign Het
Cnbd2 G T 2: 156,181,141 (GRCm39) V192F probably benign Het
Col6a3 C A 1: 90,730,149 (GRCm39) G1112V probably damaging Het
Csta2 A T 16: 36,077,731 (GRCm39) Y96F possibly damaging Het
Cyp3a25 A G 5: 145,914,481 (GRCm39) F483S possibly damaging Het
Dscam T C 16: 96,485,018 (GRCm39) E1103G probably benign Het
Dync2h1 G A 9: 7,131,921 (GRCm39) Q1629* probably null Het
Enpp6 A G 8: 47,440,118 (GRCm39) Y38C probably damaging Het
Epg5 T A 18: 78,028,272 (GRCm39) L1271Q probably damaging Het
Fam47e G A 5: 92,722,528 (GRCm39) V75I probably benign Het
Fat3 T C 9: 15,881,095 (GRCm39) D3259G probably damaging Het
Fbxw28 T C 9: 109,159,921 (GRCm39) D211G probably damaging Het
Flnc A G 6: 29,446,842 (GRCm39) N990D probably benign Het
Frat1 T G 19: 41,818,761 (GRCm39) L52R probably damaging Het
Ftmt C G 18: 52,464,658 (GRCm39) probably benign Het
H2-M1 C T 17: 36,982,112 (GRCm39) G163D probably benign Het
Hapln1 A G 13: 89,749,769 (GRCm39) K105E possibly damaging Het
Igkv17-127 G T 6: 67,838,381 (GRCm39) A31S probably benign Het
Il6st T C 13: 112,637,695 (GRCm39) L628P probably damaging Het
Kcnj6 A G 16: 94,633,472 (GRCm39) I213T probably damaging Het
Kidins220 T C 12: 25,063,442 (GRCm39) probably null Het
Lama2 TTTGCGCATT TTT 10: 26,919,639 (GRCm39) probably null Het
Llgl1 C T 11: 60,600,394 (GRCm39) P581L probably benign Het
Mertk C A 2: 128,625,845 (GRCm39) P660Q probably damaging Het
Mrtfa A G 15: 80,902,587 (GRCm39) Y241H probably damaging Het
Mtarc2 A T 1: 184,577,821 (GRCm39) I65N probably damaging Het
Napepld A G 5: 21,888,438 (GRCm39) Y4H probably benign Het
Ncam1 T A 9: 49,456,551 (GRCm39) probably null Het
Nuak2 A T 1: 132,252,724 (GRCm39) K93* probably null Het
Oat A T 7: 132,165,951 (GRCm39) D211E probably benign Het
Or1j19 A G 2: 36,676,810 (GRCm39) Q91R probably benign Het
Or2aj6 G A 16: 19,442,950 (GRCm39) A300V probably benign Het
Or4c109 A C 2: 88,818,454 (GRCm39) L31V probably null Het
Or51b17 A G 7: 103,542,672 (GRCm39) I90T possibly damaging Het
Or7a39 A T 10: 78,715,041 (GRCm39) S12C probably benign Het
Pde4dip C A 3: 97,616,874 (GRCm39) K1789N probably damaging Het
Piezo2 T C 18: 63,211,862 (GRCm39) I1322V possibly damaging Het
Pih1d1 A G 7: 44,803,951 (GRCm39) probably benign Het
Plekhd1 T C 12: 80,769,101 (GRCm39) S454P probably damaging Het
Polr2h G A 16: 20,539,303 (GRCm39) V89M probably damaging Het
Pptc7 G A 5: 122,422,780 (GRCm39) G17S possibly damaging Het
Pramel55 T C 5: 95,949,586 (GRCm39) V111A probably benign Het
Ptpra T C 2: 130,386,356 (GRCm39) V602A probably damaging Het
Rnf123 C T 9: 107,940,879 (GRCm39) R654H probably damaging Het
Rufy4 T C 1: 74,186,822 (GRCm39) C537R probably damaging Het
Samsn1 A G 16: 75,675,991 (GRCm39) S135P probably damaging Het
Sgsm3 A G 15: 80,890,980 (GRCm39) N147S probably benign Het
Shoc1 T C 4: 59,062,640 (GRCm39) Y872C probably damaging Het
Slc22a29 T C 19: 8,138,933 (GRCm39) T510A probably benign Het
Smc4 T A 3: 68,939,144 (GRCm39) H978Q probably damaging Het
Sox7 G A 14: 64,185,927 (GRCm39) R321H probably damaging Het
Spred3 T C 7: 28,861,258 (GRCm39) D307G probably damaging Het
Syne2 T A 12: 75,900,875 (GRCm39) D11E probably benign Het
Tob1 ACAGCAGCAGCAGCAGCAGCAGCAGCA ACAGCAGCAGCAGCAGCAGCAGCA 11: 94,105,278 (GRCm39) probably benign Het
Tspan1 T A 4: 116,020,563 (GRCm39) R206* probably null Het
Ttc3 A T 16: 94,230,314 (GRCm39) N837I probably damaging Het
Vmn1r36 T C 6: 66,693,549 (GRCm39) T72A possibly damaging Het
Vmn2r10 A G 5: 109,151,324 (GRCm39) S97P probably damaging Het
Zfp2 T A 11: 50,790,841 (GRCm39) I401F probably damaging Het
Zfp629 T C 7: 127,210,190 (GRCm39) T540A possibly damaging Het
Zfr G A 15: 12,166,231 (GRCm39) V834I 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
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
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
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'- CATCAAGCTATGCCATTGTTTTCCAG -3'
(R):5'- CTGTCAGTTAGATTAGAATTCCAGC -3'

Sequencing Primer
(F):5'- AGTTGACACTGACTTACATCTTGCTG -3'
(R):5'- AGCTCCATTCAGACTTTACCTGTAAC -3'
Posted On 2016-03-17