Incidental Mutation 'IGL00518:Top2a'
ID 4503
Institutional Source Australian Phenomics Network (link to record)
Gene Symbol Top2a
Ensembl Gene ENSMUSG00000020914
Gene Name topoisomerase (DNA) II alpha
Synonyms DNA Topoisomerase II alpha, Top-2
Accession Numbers
Essential gene? Probably essential (E-score: 0.970) question?
Stock # IGL00518
Quality Score
Status
Chromosome 11
Chromosomal Location 98883769-98915015 bp(-) (GRCm39)
Type of Mutation nonsense
DNA Base Change (assembly) A to T at 98909647 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Tyrosine to Stop codon at position 150 (Y150*)
Ref Sequence ENSEMBL: ENSMUSP00000068896 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000068031]
AlphaFold Q01320
Predicted Effect probably null
Transcript: ENSMUST00000068031
AA Change: Y150*
SMART Domains Protein: ENSMUSP00000068896
Gene: ENSMUSG00000020914
AA Change: Y150*

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: ENSMUST00000083328
Predicted Effect noncoding transcript
Transcript: ENSMUST00000129777
Predicted Effect noncoding transcript
Transcript: ENSMUST00000139730
Coding Region Coverage
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, 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: 26 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Adam23 T C 1: 63,610,113 (GRCm39) V705A probably damaging Het
Cacna2d4 C T 6: 119,320,536 (GRCm39) L905F probably damaging Het
Copb2 A T 9: 98,464,947 (GRCm39) K627N possibly damaging Het
Dennd5b A G 6: 148,928,828 (GRCm39) C782R probably damaging Het
Diaph1 A G 18: 38,026,401 (GRCm39) probably null Het
Esyt1 C T 10: 128,357,743 (GRCm39) D243N probably benign Het
Hectd1 A G 12: 51,823,272 (GRCm39) probably benign Het
Klk1b4 T C 7: 43,860,456 (GRCm39) probably benign Het
Lce1i T A 3: 92,684,911 (GRCm39) R88S unknown Het
Lrrc37a G T 11: 103,391,177 (GRCm39) P1416Q probably benign Het
Mcm6 C A 1: 128,272,120 (GRCm39) A426S probably damaging Het
Mycbp2 C T 14: 103,393,244 (GRCm39) V3106I probably damaging Het
Nkiras1 T G 14: 18,278,435 (GRCm38) F50V probably benign Het
Pik3r6 A T 11: 68,425,077 (GRCm39) I457F probably damaging Het
Rbck1 T C 2: 152,160,315 (GRCm39) K455E probably damaging Het
Ryr2 T A 13: 11,848,978 (GRCm39) probably benign Het
Serpinb9b T A 13: 33,223,553 (GRCm39) F248L probably benign Het
Sox6 C A 7: 115,076,441 (GRCm39) M733I probably benign Het
Supt20 T C 3: 54,622,590 (GRCm39) S446P probably damaging Het
Tmem209 A G 6: 30,487,416 (GRCm39) M530T probably damaging Het
Trmt9b C T 8: 36,979,453 (GRCm39) T352I possibly damaging Het
Ttn T A 2: 76,733,726 (GRCm39) probably benign Het
Ubr2 A G 17: 47,303,922 (GRCm39) Y138H probably damaging Het
Utrn A G 10: 12,542,587 (GRCm39) probably benign Het
Zfp354a T A 11: 50,961,381 (GRCm39) S531T probably damaging Het
Zscan4d T C 7: 10,896,281 (GRCm39) E363G probably benign Het
Other mutations in Top2a
AlleleSourceChrCoordTypePredicted EffectPPH Score
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
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
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 2012-04-20
Science Writer Anne Murray