Incidental Mutation 'R4630:Top2b'
ID 349139
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms Top-2, D230016L12Rik
MMRRC Submission 041895-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.924) question?
Stock # R4630 (G1)
Quality Score 225
Status 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: 99.3%
  • 3x: 98.6%
  • 10x: 97.3%
  • 20x: 95.2%
Validation Efficiency 97% (74/76)
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: 69 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
3110070M22Rik A T 13: 119,624,622 (GRCm39) probably benign Het
Alkbh2 C T 5: 114,262,287 (GRCm39) E148K probably damaging Het
Aopep T C 13: 63,215,906 (GRCm39) S393P probably benign Het
BC024139 T G 15: 76,009,294 (GRCm39) Q240P probably benign Het
Bckdha A T 7: 25,330,884 (GRCm39) I44N probably damaging Het
Brpf1 T C 6: 113,286,867 (GRCm39) Y32H probably damaging Het
Catip A G 1: 74,408,072 (GRCm39) probably benign Het
Ccdc138 T C 10: 58,409,477 (GRCm39) L602P probably damaging Het
Cilp A T 9: 65,187,162 (GRCm39) T1086S probably benign Het
Comp A T 8: 70,827,032 (GRCm39) I58F possibly damaging Het
Crygs T C 16: 22,624,268 (GRCm39) E113G possibly damaging Het
Dnmt3b C T 2: 153,512,235 (GRCm39) R319* probably null Het
Eif3a A G 19: 60,758,366 (GRCm39) I804T unknown Het
Eif3a A T 19: 60,766,424 (GRCm39) H301Q probably benign Het
Elf3 A T 1: 135,184,478 (GRCm39) probably benign Het
Fads2b C A 2: 85,348,990 (GRCm39) G41* probably null Het
Gm10384 A G 15: 36,872,017 (GRCm39) noncoding transcript Het
Gm11627 T A 11: 102,469,657 (GRCm39) probably benign Het
Gpr183 A T 14: 122,192,261 (GRCm39) Y87N probably damaging Het
Gpr183 G C 14: 122,192,262 (GRCm39) Y86* probably null Het
Gpr26 T C 7: 131,568,709 (GRCm39) V18A probably damaging Het
Herc1 T A 9: 66,340,996 (GRCm39) probably null Het
Hint2 C T 4: 43,656,396 (GRCm39) probably benign Het
Jag1 A T 2: 136,927,899 (GRCm39) D837E probably damaging Het
Jmjd1c C A 10: 66,993,753 (GRCm39) S78* probably null Het
Kcnd3 C T 3: 105,566,082 (GRCm39) A421V probably damaging Het
Krt1 C T 15: 101,754,622 (GRCm39) G543S unknown Het
Lalba T C 15: 98,380,549 (GRCm39) M2V probably benign Het
Lama1 T A 17: 68,101,295 (GRCm39) D1929E probably benign Het
Macf1 T C 4: 123,367,432 (GRCm39) K878R possibly damaging Het
Mboat4 T C 8: 34,591,108 (GRCm39) S182P probably damaging Het
Muc5b A T 7: 141,411,721 (GRCm39) T1556S unknown Het
Myo1g T C 11: 6,469,047 (GRCm39) Y85C probably damaging Het
Ncapd2 C A 6: 125,156,196 (GRCm39) probably null Het
Nox3 T C 17: 3,744,257 (GRCm39) D96G possibly damaging Het
Or10a48 T C 7: 108,424,802 (GRCm39) M135V probably damaging Het
Or1e17 T C 11: 73,831,822 (GRCm39) L250P probably damaging Het
Or6c212 A G 10: 129,559,350 (GRCm39) L21P probably damaging Het
Pacs1 C T 19: 5,206,384 (GRCm39) probably null Het
Pgap4 C G 4: 49,586,254 (GRCm39) V305L probably benign Het
Pgm5 C A 19: 24,812,110 (GRCm39) G141* probably null Het
Pik3r4 A G 9: 105,532,098 (GRCm39) M557V probably benign Het
Pld4 T A 12: 112,731,498 (GRCm39) V217D probably damaging Het
Pphln1-ps1 T C 16: 13,495,278 (GRCm39) S126P probably damaging Het
Ppp1r3c T C 19: 36,710,915 (GRCm39) E285G probably benign Het
Pradc1 T A 6: 85,424,275 (GRCm39) M24L possibly damaging Het
Prepl T C 17: 85,390,659 (GRCm39) T100A probably benign Het
Rmi2 C T 16: 10,704,073 (GRCm39) T138I probably benign Het
Rtkn A T 6: 83,129,163 (GRCm39) K540* probably null Het
Sag C A 1: 87,762,340 (GRCm39) T335K probably damaging Het
Setd4 A G 16: 93,388,114 (GRCm39) L124P probably benign Het
Sh3gl2 A G 4: 85,297,646 (GRCm39) D208G probably damaging Het
Sult4a1 T C 15: 83,989,779 (GRCm39) T8A possibly damaging Het
Tert A G 13: 73,797,110 (GRCm39) D1116G probably damaging Het
Tlr4 A G 4: 66,757,477 (GRCm39) E90G probably benign Het
Tmem123 T C 9: 7,791,393 (GRCm39) L164P probably damaging Het
Trak1 G A 9: 121,283,491 (GRCm39) R419Q probably benign Het
Trp53bp1 G T 2: 121,038,368 (GRCm39) A1490D probably damaging Het
Ttc16 T C 2: 32,665,389 (GRCm39) probably benign Het
Tyw5 T A 1: 57,427,686 (GRCm39) Q306L probably damaging Het
Ube2j2 T A 4: 156,039,715 (GRCm39) I14N probably damaging Het
Vmn2r103 T C 17: 20,013,958 (GRCm39) I250T probably benign Het
Zar1 A G 5: 72,738,249 (GRCm39) V51A probably benign Het
Zbtb38 T G 9: 96,570,904 (GRCm39) N60T probably damaging Het
Zfp354a T C 11: 50,961,045 (GRCm39) S417P probably damaging Het
Zfp410 A T 12: 84,372,510 (GRCm39) D112V probably damaging Het
Zfp518a C T 19: 40,901,423 (GRCm39) Q451* probably null Het
Zfp64 T C 2: 168,768,463 (GRCm39) N383S possibly damaging Het
Zfp687 A T 3: 94,919,799 (GRCm39) probably null 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
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'- GCACTGAAGATGGGATCAACTG -3'
(R):5'- TTGAAGTACTCTCCCTGAGCAG -3'

Sequencing Primer
(F):5'- CTGAAGATGGGATCAACTGAGAACTG -3'
(R):5'- TCTCCCTGAGCAGAAAAACTAAATG -3'
Posted On 2015-10-08