Incidental Mutation 'R2219:Top2b'
ID 241359
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms Top-2, D230016L12Rik
MMRRC Submission 040221-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.924) question?
Stock # R2219 (G1)
Quality Score 225
Status Not validated
Chromosome 14
Chromosomal Location 6038976-6104585 bp(-) (GRCm39)
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: 95.0%
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: 87 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4933421I07Rik A G 7: 42,095,769 (GRCm39) Y160H probably damaging Het
Adamts16 G A 13: 70,927,637 (GRCm39) probably benign Het
Adgre1 T A 17: 57,708,912 (GRCm39) N34K possibly damaging Het
Ago2 T A 15: 73,018,260 (GRCm39) E59D probably benign Het
Akap8l G T 17: 32,553,605 (GRCm39) Q372K probably benign Het
Aox1 A G 1: 58,388,289 (GRCm39) probably null Het
Apc2 T C 10: 80,144,943 (GRCm39) V618A probably benign Het
Cacna1d A T 14: 29,764,047 (GRCm39) C2140S probably damaging Het
Cadps2 A G 6: 23,410,831 (GRCm39) L671P probably damaging Het
Capn9 C T 8: 125,335,898 (GRCm39) R529* probably null Het
Ccdc180 T A 4: 45,944,949 (GRCm39) N1452K probably damaging Het
Cdh5 A T 8: 104,869,538 (GRCm39) I755F possibly damaging Het
Cdkal1 T A 13: 29,538,741 (GRCm39) M473L probably benign Het
Cfap65 T C 1: 74,943,184 (GRCm39) I1614V probably damaging Het
Champ1 A G 8: 13,930,017 (GRCm39) H725R probably damaging Het
Cntnap5a A T 1: 116,508,369 (GRCm39) T1294S possibly damaging Het
Cops8 A C 1: 90,534,341 (GRCm39) N94T probably benign Het
Cpne7 G T 8: 123,851,177 (GRCm39) V155L probably benign Het
Dhx29 T C 13: 113,089,338 (GRCm39) V703A probably damaging Het
Dhx30 A G 9: 109,916,703 (GRCm39) L575P probably damaging Het
Dmc1 T A 15: 79,469,327 (GRCm39) H156L possibly damaging Het
Dnmt3a A G 12: 3,899,654 (GRCm39) probably benign Het
Dst C G 1: 34,209,514 (GRCm39) L869V probably damaging Het
Eif3d A T 15: 77,849,142 (GRCm39) M180K probably benign Het
Erbb3 T C 10: 128,405,740 (GRCm39) T1173A probably damaging Het
Fat4 A T 3: 39,064,364 (GRCm39) K4773N probably damaging Het
Fbn2 G A 18: 58,186,035 (GRCm39) P1771L possibly damaging Het
Fer1l4 T G 2: 155,873,684 (GRCm39) Y1207S probably damaging Het
Fermt2 G A 14: 45,713,354 (GRCm39) T87I probably benign Het
Fpr3 T A 17: 18,191,644 (GRCm39) M305K possibly damaging Het
Fzd2 A G 11: 102,496,249 (GRCm39) E231G probably benign Het
Ggcx T C 6: 72,404,965 (GRCm39) Y458H probably benign Het
Ggt7 A G 2: 155,337,639 (GRCm39) S504P probably damaging Het
Gm4884 A G 7: 40,692,910 (GRCm39) H293R possibly damaging Het
Gm5475 A G 15: 100,322,094 (GRCm39) probably benign Het
Gm5930 A T 14: 44,573,993 (GRCm39) L115M probably damaging Het
Itln1 T A 1: 171,359,115 (GRCm39) T122S probably damaging Het
Itpr3 T A 17: 27,334,027 (GRCm39) L2033Q probably benign Het
Lama2 T C 10: 26,919,565 (GRCm39) D2222G probably damaging Het
Lars2 T C 9: 123,247,845 (GRCm39) L334P probably damaging Het
Ly9 T C 1: 171,425,249 (GRCm39) probably null Het
Man1a T C 10: 53,853,145 (GRCm39) I324M probably damaging Het
Mast3 T C 8: 71,233,607 (GRCm39) E994G probably damaging Het
Mettl21a A T 1: 64,655,442 (GRCm39) V46E probably damaging Het
Mmp15 A G 8: 96,096,801 (GRCm39) D398G probably benign Het
Mybpc1 T A 10: 88,391,540 (GRCm39) D319V probably damaging Het
Or10ad1c T A 15: 98,084,848 (GRCm39) K277* probably null Het
Or4a47 A T 2: 89,665,769 (GRCm39) D173E probably damaging Het
Or4a78 A T 2: 89,498,211 (GRCm39) N6K possibly damaging Het
Or4c35 G A 2: 89,808,256 (GRCm39) V45I possibly damaging Het
Or4f61 A T 2: 111,922,752 (GRCm39) I98N probably damaging Het
Or5b113 T A 19: 13,342,901 (GRCm39) I303N possibly damaging Het
Or5p5 G A 7: 107,414,429 (GRCm39) V213I probably benign Het
Or9m1 A C 2: 87,733,269 (GRCm39) Y250* probably null Het
Otogl C T 10: 107,692,838 (GRCm39) C882Y probably damaging Het
Parp10 A G 15: 76,117,783 (GRCm39) Y868H probably damaging Het
Pick1 T A 15: 79,123,899 (GRCm39) I90N probably damaging Het
Piezo1 C T 8: 123,218,227 (GRCm39) V1170I probably benign Het
Pim3 G A 15: 88,747,115 (GRCm39) V54I possibly damaging Het
Pinlyp T C 7: 24,245,433 (GRCm39) probably benign Het
Pira12 A T 7: 3,900,488 (GRCm39) N87K probably benign Het
Ppfia3 G A 7: 45,004,314 (GRCm39) Q473* probably null Het
Rab3gap2 G A 1: 185,008,113 (GRCm39) G1056E probably damaging Het
Ralgapa2 G A 2: 146,263,599 (GRCm39) T706I probably benign Het
Reln T C 5: 22,177,045 (GRCm39) T1874A possibly damaging Het
Rftn1 C A 17: 50,476,173 (GRCm39) M1I probably null Het
Ros1 T A 10: 52,042,175 (GRCm39) Q250L probably damaging Het
Slc11a1 T A 1: 74,419,824 (GRCm39) F166I probably damaging Het
Slc17a9 A G 2: 180,373,755 (GRCm39) T59A probably benign Het
Slc26a5 T C 5: 22,028,476 (GRCm39) K364R probably damaging Het
Slitrk2 T C X: 65,698,754 (GRCm39) I415T probably damaging Het
Stom A G 2: 35,211,613 (GRCm39) I136T possibly damaging Het
Strc G T 2: 121,195,004 (GRCm39) P1728T probably damaging Het
Telo2 C A 17: 25,322,673 (GRCm39) V640F probably benign Het
Tg T C 15: 66,553,782 (GRCm39) V399A probably benign Het
Tmem214 A G 5: 31,030,975 (GRCm39) K383E possibly damaging Het
Tomm40l A T 1: 171,049,550 (GRCm39) L13* probably null Het
Tonsl A T 15: 76,518,840 (GRCm39) N526K probably damaging Het
Tymp T A 15: 89,258,965 (GRCm39) M240L probably benign Het
Ubr2 A T 17: 47,296,968 (GRCm39) S271T possibly damaging Het
Uggt2 A T 14: 119,312,749 (GRCm39) N353K probably damaging Het
Ugt2b35 T A 5: 87,151,191 (GRCm39) F266I possibly damaging Het
Vmn2r103 C T 17: 20,013,909 (GRCm39) R234W probably damaging Het
Zfp109 C A 7: 23,927,886 (GRCm39) D508Y probably damaging Het
Zfp623 T C 15: 75,819,379 (GRCm39) S112P possibly damaging Het
Zfp735 A G 11: 73,601,851 (GRCm39) N265S possibly damaging Het
Zfp879 A G 11: 50,724,094 (GRCm39) C321R 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
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
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'- TAAGCACTGAAGATGGGATCAACTG -3'
(R):5'- TGAAGTACTCTCCCTGAGCAG -3'

Sequencing Primer
(F):5'- CTGAAGATGGGATCAACTGAGAACTG -3'
(R):5'- TCTCCCTGAGCAGAAAAACTAAATG -3'
Posted On 2014-10-15