Incidental Mutation 'R0116:Top2a'
ID 20824
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 038402-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.970) question?
Stock # R0116 (G1)
Quality Score 225
Status Validated (trace)
Chromosome 11
Chromosomal Location 98883769-98915015 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) T to C at 98894416 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Threonine to Alanine at position 972 (T972A)
Ref Sequence ENSEMBL: ENSMUSP00000068896 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000068031]
AlphaFold Q01320
Predicted Effect probably benign
Transcript: ENSMUST00000068031
AA Change: T972A

PolyPhen 2 Score 0.004 (Sensitivity: 0.98; Specificity: 0.59)
SMART Domains Protein: ENSMUSP00000068896
Gene: ENSMUSG00000020914
AA Change: T972A

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: ENSMUST00000104097
Predicted Effect noncoding transcript
Transcript: ENSMUST00000144318
Predicted Effect noncoding transcript
Transcript: ENSMUST00000151997
Meta Mutation Damage Score 0.1320 question?
Coding Region Coverage
  • 1x: 99.1%
  • 3x: 98.4%
  • 10x: 96.7%
  • 20x: 94.2%
Validation Efficiency 94% (95/101)
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: 95 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4931406C07Rik A T 9: 15,202,066 (GRCm39) V152E probably damaging Het
Abca5 T G 11: 110,167,331 (GRCm39) E1495A probably damaging Het
Abcc12 G A 8: 87,261,627 (GRCm39) S668F probably benign Het
Adgrl4 A T 3: 151,223,247 (GRCm39) T608S probably benign Het
Angel2 G A 1: 190,673,187 (GRCm39) D255N probably benign Het
Apob T A 12: 8,039,113 (GRCm39) probably benign Het
Arfgef2 A T 2: 166,715,603 (GRCm39) R1349S probably damaging Het
Atp2b2 C T 6: 113,770,656 (GRCm39) V418I probably damaging Het
Birc6 C A 17: 74,930,741 (GRCm39) probably benign Het
Capn13 T A 17: 73,658,519 (GRCm39) Y183F probably damaging Het
Cngb1 A G 8: 95,987,266 (GRCm39) S352P probably damaging Het
Col6a3 A G 1: 90,741,273 (GRCm39) S720P probably damaging Het
Cpa4 C T 6: 30,579,657 (GRCm39) R155W probably damaging Het
Dapk1 A G 13: 60,908,914 (GRCm39) I1176V probably benign Het
Dnah17 T C 11: 117,949,132 (GRCm39) E2959G probably benign Het
Dnah7b T A 1: 46,252,520 (GRCm39) I1734N possibly damaging Het
Dnajb7 A G 15: 81,291,555 (GRCm39) Y261H probably benign Het
Dock2 T C 11: 34,579,392 (GRCm39) probably benign Het
Dyrk3 A T 1: 131,057,576 (GRCm39) V199E probably damaging Het
F2r G T 13: 95,740,994 (GRCm39) C180* probably null Het
F5 A G 1: 164,012,483 (GRCm39) S466G probably benign Het
Fbn2 A T 18: 58,235,445 (GRCm39) C677* probably null Het
Fbxo41 A G 6: 85,454,890 (GRCm39) S673P probably damaging Het
Fhad1 G T 4: 141,667,406 (GRCm39) H639N probably benign Het
Fmnl3 G C 15: 99,220,619 (GRCm39) probably benign Het
Foxa2 A G 2: 147,885,481 (GRCm39) S270P probably damaging Het
Fxyd7 C T 7: 30,746,793 (GRCm39) probably null Het
Gm5225 A G 17: 24,243,032 (GRCm39) D67G probably benign Het
Grik3 G A 4: 125,564,349 (GRCm39) E444K probably benign Het
Gsdma2 A G 11: 98,540,009 (GRCm39) K44E probably damaging Het
Haus1 T A 18: 77,849,770 (GRCm39) K130* probably null Het
Heg1 A G 16: 33,556,028 (GRCm39) probably benign Het
Hormad2 A G 11: 4,362,206 (GRCm39) probably benign Het
Hsd17b3 G A 13: 64,206,403 (GRCm39) R300C possibly damaging Het
Irf5 T C 6: 29,536,108 (GRCm39) F374S probably damaging Het
Itch A G 2: 155,059,903 (GRCm39) probably benign Het
Jade2 A T 11: 51,722,136 (GRCm39) L139Q probably damaging Het
Kif5c G A 2: 49,642,251 (GRCm39) probably benign Het
Lama1 T C 17: 68,083,918 (GRCm39) Y1387H probably benign Het
Larp4b A G 13: 9,220,724 (GRCm39) R658G probably damaging Het
Mcph1 C T 8: 18,838,264 (GRCm39) L729F probably benign Het
Me1 A T 9: 86,536,720 (GRCm39) N118K probably benign Het
Med13 A G 11: 86,210,723 (GRCm39) L473S probably damaging Het
Mgam T A 6: 40,635,921 (GRCm39) Y359N probably damaging Het
Morc2b A G 17: 33,356,015 (GRCm39) S586P probably damaging Het
Mthfr A G 4: 148,135,980 (GRCm39) D310G probably benign Het
Mtmr7 A T 8: 41,034,447 (GRCm39) probably benign Het
Mtus1 A G 8: 41,451,514 (GRCm39) probably benign Het
Mus81 G T 19: 5,536,552 (GRCm39) A138D probably damaging Het
Myom2 A T 8: 15,167,633 (GRCm39) I1073F probably damaging Het
Nhsl1 A T 10: 18,400,990 (GRCm39) K739* probably null Het
Nlrp4d T A 7: 10,108,818 (GRCm39) K762N probably benign Het
Nrap T C 19: 56,343,978 (GRCm39) Y724C probably damaging Het
Ogn A T 13: 49,774,514 (GRCm39) Y219F possibly damaging Het
Or6c212 T A 10: 129,558,846 (GRCm39) D189V probably damaging Het
Or8b56 T C 9: 38,739,860 (GRCm39) L291P probably damaging Het
Or8g30 A T 9: 39,230,160 (GRCm39) I250N probably damaging Het
Padi2 T C 4: 140,653,550 (GRCm39) V180A probably benign Het
Papss2 C T 19: 32,615,768 (GRCm39) R167* probably null Het
Pcbp2 T C 15: 102,382,670 (GRCm39) probably benign Het
Per1 T A 11: 68,992,706 (GRCm39) probably benign Het
Pik3ca T C 3: 32,514,094 (GRCm39) I860T probably damaging Het
Pkdrej G A 15: 85,701,746 (GRCm39) Q1397* probably null Het
Plce1 T C 19: 38,710,265 (GRCm39) V1133A probably benign Het
Pnma8a T G 7: 16,694,625 (GRCm39) V160G probably damaging Het
Prss12 T C 3: 123,276,423 (GRCm39) C351R probably damaging Het
Qprt A T 7: 126,708,269 (GRCm39) L54Q probably damaging Het
Raf1 C T 6: 115,603,344 (GRCm39) S165N probably damaging Het
Rere A G 4: 150,701,433 (GRCm39) N1271S probably benign Het
Rnasel T A 1: 153,630,258 (GRCm39) L258H probably damaging Het
Ryr2 T C 13: 11,724,807 (GRCm39) D2502G probably damaging Het
Ryr3 G A 2: 112,633,510 (GRCm39) S2081L probably damaging Het
Sc5d G T 9: 42,171,155 (GRCm39) Y11* probably null Het
Slc25a29 A C 12: 108,793,017 (GRCm39) L187R possibly damaging Het
Slc2a7 G A 4: 150,252,721 (GRCm39) V454M probably benign Het
Slco1b2 A T 6: 141,615,114 (GRCm39) T340S probably benign Het
Smarcc1 A G 9: 109,976,172 (GRCm39) N153S possibly damaging Het
Snx1 C A 9: 65,995,821 (GRCm39) E516* probably null Het
Sptlc2 T C 12: 87,403,454 (GRCm39) D115G probably benign Het
Stard9 A G 2: 120,464,736 (GRCm39) N67S probably damaging Het
Styxl2 A C 1: 165,927,270 (GRCm39) S781A probably benign Het
Swap70 G A 7: 109,872,489 (GRCm39) R368H probably benign Het
Tcaf3 T C 6: 42,568,284 (GRCm39) K691E probably benign Het
Tmco4 T C 4: 138,781,231 (GRCm39) F465S probably damaging Het
Tmem245 A G 4: 56,926,213 (GRCm39) S290P probably benign Het
Tpr T A 1: 150,285,898 (GRCm39) S527R probably damaging Het
Traf2 T C 2: 25,409,621 (GRCm39) D443G probably damaging Het
Trim40 A T 17: 37,194,039 (GRCm39) probably null Het
Trim42 A T 9: 97,245,456 (GRCm39) I448N possibly damaging Het
Ttll9 G A 2: 152,825,054 (GRCm39) V78M probably damaging Het
Vav1 C T 17: 57,603,039 (GRCm39) L88F probably damaging Het
Vps13b A G 15: 35,423,301 (GRCm39) D207G probably damaging Het
Wdsub1 A G 2: 59,707,009 (GRCm39) probably null Het
Zfp799 A G 17: 33,040,009 (GRCm39) W85R possibly damaging Het
Zfp839 A T 12: 110,825,203 (GRCm39) probably benign 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
R0245:Top2a UTSW 11 98,900,922 (GRCm39) missense probably benign 0.37
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'- TGGGTAACCCTTATAAAAGCTGCCTGA -3'
(R):5'- GCTTCCCATCCGAACGTGGACT -3'

Sequencing Primer
(F):5'- gccagaagaagacaccttgac -3'
(R):5'- CGTGGACTCAGGTAAGTAACTATTG -3'
Protein Function and Prediction

DNA Topoisomerase II alpha (Top2a) encodes a DNA topoisomerase that, through an association with the pol II holoenzyme, controls the topologic states of DNA in both prokaryotes and eukaryotes and is required for chromatin-dependent coactivation (1). In eukaryote cells, Top2a catalyzes the relaxation of supercoiled DNA, catenation, decatenation, knotting, and unknotting of circular DNA. In mouse, Top2a is abundant in testis and spleen (2). Top2a expression varies throughout the cell cycle, with highest expression in G2/M; the level of Top2a mRNA is determined by a cell cycle-regulated promoter (3). Treatment of mouse zygotes with Top2a-targeted antisense oligodeoxynucleotides led to arrest at the 2-cell stage, indicating that Top2a is essential for preimplantation development (4).

References
Posted On 2013-04-11
Science Writer Anne Murray