Incidental Mutation 'R0245:Top2a'
ID 36186
Institutional Source Beutler Lab
Gene Symbol Top2a
Ensembl Gene ENSMUSG00000020914
Gene Name topoisomerase (DNA) II alpha
Synonyms DNA Topoisomerase II alpha, Top-2
MMRRC Submission 038483-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.970) question?
Stock # R0245 (G1)
Quality Score 225
Status Validated
Chromosome 11
Chromosomal Location 98883769-98915015 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) T to C at 98900922 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Isoleucine to Valine at position 556 (I556V)
Ref Sequence ENSEMBL: ENSMUSP00000068896 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000068031]
AlphaFold Q01320
Predicted Effect probably benign
Transcript: ENSMUST00000068031
AA Change: I556V

PolyPhen 2 Score 0.373 (Sensitivity: 0.90; Specificity: 0.89)
SMART Domains Protein: ENSMUSP00000068896
Gene: ENSMUSG00000020914
AA Change: I556V

DomainStartEndE-ValueType
low complexity region 10 21 N/A INTRINSIC
Blast:TOP2c 22 60 3e-12 BLAST
HATPase_c 75 224 1.81e-2 SMART
TOP2c 79 669 N/A SMART
TOP4c 692 1166 3.58e-234 SMART
low complexity region 1192 1202 N/A INTRINSIC
low complexity region 1226 1238 N/A INTRINSIC
low complexity region 1261 1273 N/A INTRINSIC
low complexity region 1291 1306 N/A INTRINSIC
low complexity region 1407 1418 N/A INTRINSIC
Pfam:DTHCT 1425 1518 1.1e-18 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000144318
Meta Mutation Damage Score 0.1220 question?
Coding Region Coverage
  • 1x: 99.4%
  • 3x: 98.6%
  • 10x: 96.7%
  • 20x: 93.9%
Validation Efficiency 99% (73/74)
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, alpha, is localized to chromosome 17 and the beta gene is localized to chromosome 3. 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. [provided by RefSeq, Jul 2010]
Allele List at MGI

All alleles(47) : Targeted(1) Gene trapped(46)

Other mutations in this stock
Total: 70 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
2310022B05Rik A G 8: 125,378,168 (GRCm39) probably benign Het
Actmap T A 7: 26,900,028 (GRCm39) C98S possibly damaging Het
Adgrg6 T A 10: 14,333,810 (GRCm39) probably benign Het
Adra2a G C 19: 54,035,840 (GRCm39) V399L probably damaging Het
Arpc1b A G 5: 145,063,670 (GRCm39) D306G probably damaging Het
Asic3 C A 5: 24,618,836 (GRCm39) R43S probably damaging Het
Astn2 T C 4: 65,712,795 (GRCm39) D615G probably damaging Het
Btbd2 A T 10: 80,483,640 (GRCm39) Y178N probably damaging Het
Cacna1c T C 6: 118,581,415 (GRCm39) N1647D probably benign Het
Cacna2d4 A T 6: 119,285,682 (GRCm39) D803V probably damaging Het
Cdh26 C T 2: 178,123,425 (GRCm39) R675C possibly damaging Het
Cdx2 C A 5: 147,243,283 (GRCm39) K170N possibly damaging Het
Cmpk2 A T 12: 26,519,517 (GRCm39) D56V probably benign Het
Dnah7a T C 1: 53,540,685 (GRCm39) Y2563C probably damaging Het
Dock7 T C 4: 98,943,586 (GRCm39) D552G possibly damaging Het
E2f7 C A 10: 110,610,656 (GRCm39) S427* probably null Het
Eps8 T C 6: 137,456,126 (GRCm39) D785G probably benign Het
Ereg G A 5: 91,222,659 (GRCm39) C14Y possibly damaging Het
Fah A C 7: 84,244,706 (GRCm39) H222Q probably benign Het
Fbxw16 T A 9: 109,265,236 (GRCm39) S432C possibly damaging Het
Fdps A G 3: 89,001,078 (GRCm39) S334P possibly damaging Het
Fgf7 A G 2: 125,877,875 (GRCm39) K81E probably benign Het
Gfra1 T C 19: 58,288,986 (GRCm39) N153S possibly damaging Het
Golga1 A G 2: 38,925,271 (GRCm39) V351A probably benign Het
Got1 A T 19: 43,492,946 (GRCm39) probably benign Het
Greb1 T C 12: 16,746,457 (GRCm39) Y1271C probably damaging Het
Gtf3c4 A G 2: 28,724,976 (GRCm39) I252T possibly damaging Het
Gucy1a1 A G 3: 82,016,094 (GRCm39) I298T possibly damaging Het
Hivep1 A G 13: 42,317,766 (GRCm39) I2081V possibly damaging Het
Hps3 A T 3: 20,066,960 (GRCm39) C535* probably null Het
Hspg2 T C 4: 137,242,033 (GRCm39) F589S probably damaging Het
Itgb8 T A 12: 119,154,290 (GRCm39) N249I probably damaging Het
Itprid1 A G 6: 55,874,992 (GRCm39) E314G probably damaging Het
Kdm4a T C 4: 118,032,886 (GRCm39) D60G probably benign Het
Kng2 A T 16: 22,830,931 (GRCm39) probably benign Het
Marchf4 A T 1: 72,573,940 (GRCm39) D119E probably benign Het
Mrpl34 T C 8: 71,917,719 (GRCm39) probably benign Het
Ncoa6 C T 2: 155,233,131 (GRCm39) G2059D probably benign Het
Nhsl1 A G 10: 18,400,856 (GRCm39) K660R probably damaging Het
Nr2c2ap T C 8: 70,584,228 (GRCm39) V6A possibly damaging Het
Or10j3b T A 1: 173,043,524 (GRCm39) I102N possibly damaging Het
Or4c29 C A 2: 88,740,219 (GRCm39) D173Y possibly damaging Het
Or4k52 A G 2: 111,610,680 (GRCm39) N5S probably damaging Het
Or5k14 A T 16: 58,693,229 (GRCm39) Y95N probably benign Het
Or7g33 C A 9: 19,448,408 (GRCm39) V273L probably benign Het
Oscar C T 7: 3,614,573 (GRCm39) probably benign Het
Pkhd1 T C 1: 20,610,624 (GRCm39) S1046G probably benign Het
Ptk6 T C 2: 180,844,284 (GRCm39) D5G probably benign Het
Rgs12 A G 5: 35,187,424 (GRCm39) H486R probably benign Het
Rnf111 C T 9: 70,361,113 (GRCm39) probably benign Het
Rnf17 A G 14: 56,676,066 (GRCm39) Y309C probably damaging Het
Rnf19a A T 15: 36,253,178 (GRCm39) I387N probably damaging Het
Safb C T 17: 56,913,025 (GRCm39) R914C probably damaging Het
Sdk1 A G 5: 141,940,713 (GRCm39) T494A probably benign Het
Serac1 G T 17: 6,102,031 (GRCm39) D384E probably damaging Het
Sez6l T C 5: 112,623,432 (GRCm39) M40V probably benign Het
Slc17a5 A G 9: 78,448,206 (GRCm39) I416T probably benign Het
Snapc1 C T 12: 74,021,806 (GRCm39) R81C probably damaging Het
Spata32 C T 11: 103,099,921 (GRCm39) A195T probably damaging Het
Srrd A G 5: 112,485,394 (GRCm39) probably benign Het
Srsf3-ps T A 11: 98,516,067 (GRCm39) probably benign Het
Supt3 T C 17: 45,347,662 (GRCm39) V208A probably benign Het
Taok3 G A 5: 117,390,744 (GRCm39) probably benign Het
Tbxas1 G T 6: 39,004,702 (GRCm39) R316S probably benign Het
Tgfbrap1 A T 1: 43,114,752 (GRCm39) I116N possibly damaging Het
Tm7sf3 T C 6: 146,520,107 (GRCm39) T260A possibly damaging Het
Uroc1 A G 6: 90,321,179 (GRCm39) M252V probably damaging Het
Xpo4 G T 14: 57,867,697 (GRCm39) H183Q probably damaging Het
Zcchc17 T A 4: 130,230,947 (GRCm39) I81L probably benign Het
Zfp455 A T 13: 67,355,899 (GRCm39) Y389F probably damaging Het
Other mutations in Top2a
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00518:Top2a APN 11 98,909,647 (GRCm39) nonsense probably null
IGL01285:Top2a APN 11 98,896,985 (GRCm39) splice site probably benign
IGL01445:Top2a APN 11 98,901,856 (GRCm39) missense probably damaging 1.00
IGL01451:Top2a APN 11 98,901,856 (GRCm39) missense probably damaging 1.00
IGL01456:Top2a APN 11 98,901,856 (GRCm39) missense probably damaging 1.00
IGL01458:Top2a APN 11 98,901,856 (GRCm39) missense probably damaging 1.00
IGL01481:Top2a APN 11 98,901,856 (GRCm39) missense probably damaging 1.00
IGL01485:Top2a APN 11 98,901,856 (GRCm39) missense probably damaging 1.00
IGL01753:Top2a APN 11 98,898,100 (GRCm39) missense probably damaging 0.97
IGL03029:Top2a APN 11 98,909,625 (GRCm39) missense probably benign 0.03
PIT4581001:Top2a UTSW 11 98,893,790 (GRCm39) missense probably damaging 0.97
PIT4585001:Top2a UTSW 11 98,892,199 (GRCm39) missense probably benign 0.02
R0008:Top2a UTSW 11 98,893,729 (GRCm39) nonsense probably null
R0047:Top2a UTSW 11 98,888,682 (GRCm39) missense probably benign
R0047:Top2a UTSW 11 98,888,682 (GRCm39) missense probably benign
R0070:Top2a UTSW 11 98,905,886 (GRCm39) critical splice acceptor site probably null
R0070:Top2a UTSW 11 98,905,886 (GRCm39) critical splice acceptor site probably null
R0116:Top2a UTSW 11 98,894,416 (GRCm39) missense probably benign 0.00
R0276:Top2a UTSW 11 98,900,733 (GRCm39) splice site probably benign
R0288:Top2a UTSW 11 98,907,249 (GRCm39) splice site probably benign
R0335:Top2a UTSW 11 98,913,781 (GRCm39) missense probably benign 0.08
R0422:Top2a UTSW 11 98,900,679 (GRCm39) missense probably damaging 1.00
R0546:Top2a UTSW 11 98,890,052 (GRCm39) missense possibly damaging 0.75
R0558:Top2a UTSW 11 98,887,665 (GRCm39) missense probably benign
R0599:Top2a UTSW 11 98,892,243 (GRCm39) missense probably damaging 0.99
R0727:Top2a UTSW 11 98,902,974 (GRCm39) nonsense probably null
R1565:Top2a UTSW 11 98,891,880 (GRCm39) missense probably damaging 0.99
R1674:Top2a UTSW 11 98,900,099 (GRCm39) missense probably damaging 0.96
R1844:Top2a UTSW 11 98,906,895 (GRCm39) missense probably benign 0.06
R1959:Top2a UTSW 11 98,886,803 (GRCm39) splice site probably null
R2124:Top2a UTSW 11 98,895,054 (GRCm39) missense probably benign 0.00
R2128:Top2a UTSW 11 98,900,633 (GRCm39) missense probably damaging 0.97
R3707:Top2a UTSW 11 98,887,651 (GRCm39) missense probably benign 0.13
R4110:Top2a UTSW 11 98,913,786 (GRCm39) missense probably damaging 1.00
R4112:Top2a UTSW 11 98,913,786 (GRCm39) missense probably damaging 1.00
R4423:Top2a UTSW 11 98,892,231 (GRCm39) missense probably benign 0.00
R4425:Top2a UTSW 11 98,892,231 (GRCm39) missense probably benign 0.00
R4914:Top2a UTSW 11 98,893,786 (GRCm39) missense probably damaging 1.00
R4939:Top2a UTSW 11 98,900,918 (GRCm39) missense probably damaging 1.00
R4944:Top2a UTSW 11 98,888,676 (GRCm39) missense probably benign 0.37
R4971:Top2a UTSW 11 98,884,667 (GRCm39) missense probably damaging 1.00
R5362:Top2a UTSW 11 98,909,738 (GRCm39) missense probably damaging 1.00
R5477:Top2a UTSW 11 98,907,306 (GRCm39) nonsense probably null
R5499:Top2a UTSW 11 98,913,202 (GRCm39) missense probably benign 0.20
R5911:Top2a UTSW 11 98,907,291 (GRCm39) missense possibly damaging 0.92
R7126:Top2a UTSW 11 98,905,818 (GRCm39) missense probably benign 0.09
R7131:Top2a UTSW 11 98,895,008 (GRCm39) missense possibly damaging 0.75
R7174:Top2a UTSW 11 98,914,922 (GRCm39) start gained probably benign
R7329:Top2a UTSW 11 98,895,072 (GRCm39) missense possibly damaging 0.57
R7560:Top2a UTSW 11 98,891,663 (GRCm39) missense probably benign
R7563:Top2a UTSW 11 98,907,005 (GRCm39) missense probably damaging 1.00
R7740:Top2a UTSW 11 98,884,640 (GRCm39) missense probably benign 0.34
R7841:Top2a UTSW 11 98,913,176 (GRCm39) missense probably damaging 1.00
R7894:Top2a UTSW 11 98,900,431 (GRCm39) missense probably damaging 1.00
R8122:Top2a UTSW 11 98,889,993 (GRCm39) missense probably benign
R8260:Top2a UTSW 11 98,891,595 (GRCm39) missense probably null 0.87
R8504:Top2a UTSW 11 98,905,567 (GRCm39) missense probably benign
R8550:Top2a UTSW 11 98,886,744 (GRCm39) missense probably benign
R8558:Top2a UTSW 11 98,912,549 (GRCm39) missense probably damaging 1.00
R8693:Top2a UTSW 11 98,900,868 (GRCm39) missense probably damaging 1.00
R8851:Top2a UTSW 11 98,900,677 (GRCm39) missense probably damaging 1.00
R9143:Top2a UTSW 11 98,900,705 (GRCm39) missense probably benign 0.14
R9240:Top2a UTSW 11 98,901,368 (GRCm39) nonsense probably null
R9294:Top2a UTSW 11 98,891,904 (GRCm39) missense probably benign 0.00
R9301:Top2a UTSW 11 98,897,790 (GRCm39) missense probably damaging 0.99
R9383:Top2a UTSW 11 98,901,884 (GRCm39) nonsense probably null
R9450:Top2a UTSW 11 98,894,434 (GRCm39) missense possibly damaging 0.73
R9515:Top2a UTSW 11 98,902,970 (GRCm39) missense probably damaging 0.99
R9655:Top2a UTSW 11 98,905,334 (GRCm39) missense probably damaging 1.00
R9683:Top2a UTSW 11 98,887,683 (GRCm39) missense probably benign 0.21
R9689:Top2a UTSW 11 98,914,883 (GRCm39) missense probably benign 0.01
U24488:Top2a UTSW 11 98,913,252 (GRCm39) missense probably damaging 1.00
X0025:Top2a UTSW 11 98,886,767 (GRCm39) missense probably benign 0.32
Predicted Primers PCR Primer
(F):5'- TCGACTCCCTGACTTAGCATAGCC -3'
(R):5'- ACACTAGTTCCCTGCCGTGGAAAG -3'

Sequencing Primer
(F):5'- GACTTAGCATAGCCAGAGTTTCAG -3'
(R):5'- GTTATCTCTAGCAAACATCCTGTCAG -3'
Posted On 2013-05-09