Incidental Mutation 'R4809:Top2b'
ID 370941
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Name topoisomerase (DNA) II beta
Synonyms Top-2, D230016L12Rik
MMRRC Submission 042428-MU
Accession Numbers
Essential gene? Probably essential (E-score: 0.924) question?
Stock # R4809 (G1)
Quality Score 225
Status Validated
Chromosome 14
Chromosomal Location 6038976-6104585 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) T to A at 16383125 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Serine to Threonine at position 38 (S38T)
Ref Sequence ENSEMBL: ENSMUSP00000017629 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000017629]
AlphaFold Q64511
Predicted Effect probably benign
Transcript: ENSMUST00000017629
AA Change: S38T

PolyPhen 2 Score 0.061 (Sensitivity: 0.94; Specificity: 0.84)
SMART Domains Protein: ENSMUSP00000017629
Gene: ENSMUSG00000017485
AA Change: S38T

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
Meta Mutation Damage Score 0.0585 question?
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.5%
  • 10x: 96.8%
  • 20x: 94.0%
Validation Efficiency 96% (96/100)
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
3425401B19Rik A G 14: 32,384,588 (GRCm39) V459A probably benign Het
Abca12 C T 1: 71,318,015 (GRCm39) A1840T probably benign Het
Abhd6 T G 14: 8,039,771 (GRCm38) M1R probably null Het
Abl1 T C 2: 31,690,254 (GRCm39) L572P probably damaging Het
Adamts2 C A 11: 50,694,517 (GRCm39) S1101R probably benign Het
Adgra2 G A 8: 27,600,507 (GRCm39) W200* probably null Het
AI661453 C A 17: 47,778,112 (GRCm39) probably benign Het
Aldh1l2 A G 10: 83,342,496 (GRCm39) F438S probably damaging Het
Ankrd49 G A 9: 14,692,510 (GRCm39) T218I possibly damaging Het
Ano7 T C 1: 93,322,288 (GRCm39) F410L probably benign Het
Aox4 T A 1: 58,305,808 (GRCm39) F1271I probably damaging Het
Aqr T C 2: 114,005,695 (GRCm39) probably benign Het
Arhgap42 A G 9: 9,180,118 (GRCm39) S54P probably damaging Het
Aunip C A 4: 134,238,450 (GRCm39) D16E possibly damaging Het
Btbd7 A G 12: 102,760,003 (GRCm39) probably null Het
Cabp4 T C 19: 4,189,290 (GRCm39) H89R probably benign Het
Ccni AAA AAACTAA 5: 93,335,429 (GRCm39) probably benign Het
Chfr C T 5: 110,306,700 (GRCm39) H410Y probably damaging Het
Churc1 C A 12: 76,829,671 (GRCm39) L111M probably damaging Het
Clasp1 C T 1: 118,388,980 (GRCm39) T113I probably benign Het
Col12a1 T A 9: 79,600,849 (GRCm39) Q745L probably benign Het
Col20a1 T C 2: 180,640,454 (GRCm39) L537P probably damaging Het
Creb5 A T 6: 53,587,411 (GRCm39) E47V probably null Het
Csnk1d A T 11: 120,854,668 (GRCm39) probably benign Het
Cts6 A T 13: 61,349,995 (GRCm39) W29R probably damaging Het
Dbt T A 3: 116,339,992 (GRCm39) I420N probably damaging Het
Det1 C A 7: 78,493,555 (GRCm39) D150Y probably damaging Het
Dlk2 A G 17: 46,609,940 (GRCm39) probably null Het
Dnmt3a A T 12: 3,950,352 (GRCm39) I639F probably damaging Het
Dock9 A T 14: 121,784,008 (GRCm39) Y1989N probably benign Het
Dsg4 A T 18: 20,599,678 (GRCm39) T765S possibly damaging Het
Entrep2 G A 7: 64,426,488 (GRCm39) T159I probably damaging Het
Epha5 C T 5: 84,253,750 (GRCm39) D548N possibly damaging Het
Fam227b T A 2: 125,958,045 (GRCm39) Y240F possibly damaging Het
Fbxw21 C T 9: 108,972,458 (GRCm39) V395I probably damaging Het
Fn1 C A 1: 71,691,959 (GRCm39) probably benign Het
Fpr-rs3 A T 17: 20,844,683 (GRCm39) S153T probably benign Het
Frem2 A G 3: 53,561,316 (GRCm39) F1064L probably benign Het
Gas2l3 CACTCGTCATACT CACT 10: 89,266,820 (GRCm39) probably benign Het
Gjd2 C T 2: 113,842,022 (GRCm39) G152R probably damaging Het
Gpr75 T C 11: 30,842,154 (GRCm39) I353T possibly damaging Het
Grb7 T C 11: 98,342,262 (GRCm39) V145A possibly damaging Het
Igkv4-73 G A 6: 69,174,807 (GRCm39) R40W unknown Het
Kif1c C T 11: 70,617,183 (GRCm39) A839V probably benign Het
Krt31 G A 11: 99,940,748 (GRCm39) A125V possibly damaging Het
Lamb1 A G 12: 31,328,525 (GRCm39) Y163C probably damaging Het
Mars1 G T 10: 127,136,084 (GRCm39) T535K probably damaging Het
Mdc1 T C 17: 36,159,993 (GRCm39) probably null Het
Micos10 C G 4: 138,858,268 (GRCm39) W10S probably damaging Het
Micu1 C T 10: 59,576,644 (GRCm39) H167Y probably benign Het
Mrgprb1 C T 7: 48,097,739 (GRCm39) V58I possibly damaging Het
Ncoa7 T A 10: 30,647,758 (GRCm39) E6V possibly damaging Het
Nectin3 A C 16: 46,268,523 (GRCm39) probably benign Het
Or13a18 A G 7: 140,190,987 (GRCm39) K295E probably damaging Het
Or4k44 C T 2: 111,367,956 (GRCm39) C226Y probably benign Het
Or52ab7 T A 7: 102,977,730 (GRCm39) Y12* probably null Het
Or8k38 T A 2: 86,488,029 (GRCm39) M258L possibly damaging Het
Pex16 T C 2: 92,206,983 (GRCm39) S54P probably damaging Het
Pik3cg A T 12: 32,254,080 (GRCm39) S636T possibly damaging Het
Plin5 A G 17: 56,423,855 (GRCm39) S27P probably benign Het
Ptch1 A T 13: 63,661,522 (GRCm39) D1068E probably damaging Het
Ptprq T C 10: 107,399,036 (GRCm39) T1960A probably damaging Het
Rap1gap2 T C 11: 74,298,800 (GRCm39) probably benign Het
Rcc2 G A 4: 140,444,353 (GRCm39) R348Q probably damaging Het
Rhbdd3 C A 11: 5,055,949 (GRCm39) A377D probably damaging Het
Rpl7 T G 1: 16,172,189 (GRCm39) probably benign Het
Scn11a G T 9: 119,648,936 (GRCm39) D42E probably benign Het
Scube3 C T 17: 28,384,147 (GRCm39) R549W probably damaging Het
Sil1 A T 18: 35,458,428 (GRCm39) M189K probably damaging Het
Slc39a6 G A 18: 24,718,531 (GRCm39) Q225* probably null Het
Slc7a15 A T 12: 8,589,002 (GRCm39) C182S probably benign Het
Spata21 G A 4: 140,824,431 (GRCm39) probably null Het
Stim2 T C 5: 54,267,955 (GRCm39) V417A probably damaging Het
Szt2 T C 4: 118,246,182 (GRCm39) D993G probably damaging Het
Tet3 A G 6: 83,379,928 (GRCm39) S747P probably benign Het
Tmem86a C G 7: 46,702,678 (GRCm39) S34R possibly damaging Het
Trim33 A T 3: 103,236,572 (GRCm39) T561S possibly damaging Het
Ttc39a C T 4: 109,273,218 (GRCm39) Q25* probably null Het
Urb1 A G 16: 90,556,730 (GRCm39) I1816T possibly damaging Het
Usp24 T C 4: 106,270,873 (GRCm39) probably null Het
Usp36 A C 11: 118,153,896 (GRCm39) L840R probably damaging Het
Usp50 C A 2: 126,619,773 (GRCm39) probably benign Het
Vangl2 A G 1: 171,837,230 (GRCm39) V193A possibly damaging Het
Vmn1r62 T A 7: 5,678,866 (GRCm39) H182Q probably benign Het
Vmn2r124 A T 17: 18,294,007 (GRCm39) Y698F probably benign Het
Wls C T 3: 159,603,082 (GRCm39) T165I probably benign Het
Zfp808 G T 13: 62,319,106 (GRCm39) E112* 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
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
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'- ACCTGCTCTACTAATTCTGATCAG -3'
(R):5'- GTCTCGCGCATTGTCTTAGC -3'

Sequencing Primer
(F):5'- TGTCTAAGTGCTAGTGATAGGTAAC -3'
(R):5'- GCGCATTGTCTTAGCTCCTCTG -3'
Posted On 2016-02-04