Incidental Mutation 'R2422:Top2b'
ID 249392
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms Top-2, D230016L12Rik
MMRRC Submission 040384-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.924) question?
Stock # R2422 (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: 99.1%
  • 3x: 98.5%
  • 10x: 97.1%
  • 20x: 94.5%
Validation Efficiency 99% (77/78)
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: 77 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4933409G03Rik A T 2: 68,421,864 (GRCm39) N47I probably benign Het
Actr5 T C 2: 158,478,001 (GRCm39) F457S probably damaging Het
Adamts3 A G 5: 89,831,034 (GRCm39) S1007P probably damaging Het
Adck2 C T 6: 39,560,932 (GRCm39) A440V possibly damaging Het
Birc6 T A 17: 74,967,609 (GRCm39) L301Q probably damaging Het
Ccdc121rt3 A T 5: 112,502,984 (GRCm39) V240D probably damaging Het
Ccdc18 A C 5: 108,376,454 (GRCm39) E1298D probably damaging Het
Ccdc77 A G 6: 120,316,120 (GRCm39) C186R probably benign Het
Cdk12 T G 11: 98,109,900 (GRCm39) S640R probably benign Het
Cdv3 T C 9: 103,242,317 (GRCm39) probably benign Het
Celf2 G A 2: 6,558,700 (GRCm39) T364I probably damaging Het
Cmtr2 C A 8: 110,949,413 (GRCm39) S574R probably benign Het
Col14a1 T C 15: 55,313,318 (GRCm39) L56P unknown Het
Cracdl C A 1: 37,652,556 (GRCm39) V1084L probably benign Het
Dctn1 C T 6: 83,176,782 (GRCm39) L1241F possibly damaging Het
Depdc5 T C 5: 33,148,379 (GRCm39) F1505S probably damaging Het
Dhcr24 G T 4: 106,418,291 (GRCm39) probably benign Het
Dnajc21 A G 15: 10,462,021 (GRCm39) S127P probably benign Het
Entpd7 A T 19: 43,716,527 (GRCm39) Y507F possibly damaging Het
Fbp1 T C 13: 63,019,120 (GRCm39) K24E probably benign Het
Galr1 A T 18: 82,424,048 (GRCm39) N76K probably damaging Het
Glrb A G 3: 80,767,542 (GRCm39) I226T probably damaging Het
Gm17421 T A 12: 113,333,107 (GRCm39) noncoding transcript Het
Gm4950 T A 18: 51,998,856 (GRCm39) Q33L probably benign Het
Gnat2 A T 3: 108,002,855 (GRCm39) M88L probably damaging Het
Gpr183 A G 14: 122,191,589 (GRCm39) Y311H probably damaging Het
H2-M10.5 A G 17: 37,085,891 (GRCm39) I308V probably benign Het
Hipk3 C T 2: 104,301,830 (GRCm39) G121R probably benign Het
Hjurp A G 1: 88,194,283 (GRCm39) probably benign Het
Homez C A 14: 55,095,031 (GRCm39) V226F probably benign Het
Inf2 C A 12: 112,577,258 (GRCm39) A1034D unknown Het
Kcnc4 G T 3: 107,352,863 (GRCm39) P572T probably benign Het
Kmt2d T C 15: 98,760,147 (GRCm39) E1037G unknown Het
Krt78 T C 15: 101,855,699 (GRCm39) E704G probably damaging Het
Lama1 A T 17: 68,057,548 (GRCm39) M541L probably benign Het
Lmbrd2 C T 15: 9,194,852 (GRCm39) T618M possibly damaging Het
Ly6g6e G A 17: 35,297,122 (GRCm39) R121Q probably benign Het
Mettl22 T C 16: 8,305,225 (GRCm39) F293L probably damaging Het
Mib1 T C 18: 10,751,906 (GRCm39) S263P probably damaging Het
Ndufaf1 T C 2: 119,486,218 (GRCm39) E298G probably damaging Het
Nek1 T C 8: 61,472,935 (GRCm39) V152A probably damaging Het
Nlrp4d T A 7: 10,096,872 (GRCm39) D876V probably benign Het
Or10d5 A G 9: 39,861,824 (GRCm39) L81P possibly damaging Het
Or11g7 T C 14: 50,690,893 (GRCm39) L128P probably damaging Het
Or5an11 A T 19: 12,246,283 (GRCm39) T230S probably damaging Het
Or5k15 T C 16: 58,710,328 (GRCm39) E85G probably benign Het
Pcdha11 G T 18: 37,140,325 (GRCm39) L651F probably damaging Het
Plekhg1 G A 10: 3,908,048 (GRCm39) M988I probably benign Het
Plxnb1 G A 9: 108,937,506 (GRCm39) R1169H probably benign Het
Ppp4r3a A G 12: 101,008,912 (GRCm39) probably benign Het
Pum2 A T 12: 8,798,931 (GRCm39) Q930L possibly damaging Het
Rbp4 T C 19: 38,112,792 (GRCm39) E67G probably damaging Het
Rgs9 C A 11: 109,116,603 (GRCm39) probably null Het
Semp2l1 C T 1: 32,584,942 (GRCm39) A323T possibly damaging Het
Sipa1 A T 19: 5,702,140 (GRCm39) D923E possibly damaging Het
Smc1a A G X: 150,830,971 (GRCm39) probably benign Het
Snx33 C A 9: 56,825,822 (GRCm39) M546I probably benign Het
Spag17 T A 3: 99,934,935 (GRCm39) W714R probably benign Het
Spata2 C T 2: 167,326,126 (GRCm39) R231Q probably damaging Het
Stard9 C T 2: 120,530,765 (GRCm39) R2341C probably benign Het
Tas2r116 A T 6: 132,832,557 (GRCm39) I53F possibly damaging Het
Tlk1 T C 2: 70,600,349 (GRCm39) E110G probably damaging Het
Tmem102 T A 11: 69,695,363 (GRCm39) E203V probably benign Het
Ttc23l G A 15: 10,537,652 (GRCm39) S206L probably benign Het
Ttc23l CT CTTGGATT 15: 10,537,648 (GRCm39) probably benign Het
Tyw5 A G 1: 57,435,907 (GRCm39) I82T possibly damaging Het
Uba6 A G 5: 86,280,475 (GRCm39) probably null Het
Ugcg C T 4: 59,207,798 (GRCm39) P46S probably benign Het
Unc13c T C 9: 73,838,829 (GRCm39) Y674C probably damaging Het
Vmn2r105 T A 17: 20,448,097 (GRCm39) R242S probably benign Het
Vmn2r12 A G 5: 109,234,398 (GRCm39) Y605H probably benign Het
Wdr77 A T 3: 105,867,337 (GRCm39) K62* probably null Het
Zfhx4 C A 3: 5,455,465 (GRCm39) A1153E probably benign Het
Zfp266 C A 9: 20,410,558 (GRCm39) V540L possibly damaging Het
Zfp638 C A 6: 83,943,421 (GRCm39) probably benign Het
Zfp644 A G 5: 106,785,110 (GRCm39) M479T possibly damaging Het
Zfp951 G A 5: 104,963,143 (GRCm39) T141I probably benign 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
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'- CACCATGGAGAAGTAAGCACTG -3'
(R):5'- ATTTGAAGTACTCTCCCTGAGCAG -3'

Sequencing Primer
(F):5'- GCACTGAAGATGGGATCAACTG -3'
(R):5'- TCTCCCTGAGCAGAAAAACTAAATG -3'
Posted On 2014-11-12