Incidental Mutation 'R4667:Top2b'
ID352080
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Nametopoisomerase (DNA) II beta
SynonymsD230016L12Rik, Top-2
MMRRC Submission 042012-MU
Accession Numbers
Is this an essential gene? Probably essential (E-score: 0.916) question?
Stock #R4667 (G1)
Quality Score225
Status Not validated
Chromosome14
Chromosomal Location16365179-16435462 bp(+) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) T to G at 16409189 bp
ZygosityHeterozygous
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]
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 0.426 question?
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.5%
  • 10x: 97.1%
  • 20x: 95.1%
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: 109 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4930539E08Rik G T 17: 28,908,313 Q241K possibly damaging Het
Acad8 A G 9: 26,990,627 L147P probably damaging Het
Adgra3 T A 5: 49,978,956 Y729F possibly damaging Het
Ago2 A G 15: 73,146,416 Y58H probably damaging Het
Akap13 A G 7: 75,729,094 T2128A probably damaging Het
Akap2 A T 4: 57,855,655 D328V possibly damaging Het
Ankhd1 C A 18: 36,648,021 P2042Q possibly damaging Het
Arhgef15 T C 11: 68,954,561 K155R probably benign Het
Atp10b T C 11: 43,247,518 F1209L probably damaging Het
B130006D01Rik A T 11: 95,726,509 probably benign Het
Bmpr2 T C 1: 59,867,716 L656S probably damaging Het
Btbd17 A G 11: 114,793,857 F119L possibly damaging Het
Ccdc191 G T 16: 43,931,283 K267N probably damaging Het
Ceacam20 T C 7: 19,986,027 Y495H probably damaging Het
Celf2 T C 2: 6,721,528 I47V probably benign Het
Chd9 T C 8: 91,033,800 S2058P possibly damaging Het
Clcn6 T C 4: 148,024,167 E135G possibly damaging Het
Cntn1 T A 15: 92,295,079 N687K probably damaging Het
Col1a2 A T 6: 4,512,412 M99L unknown Het
Cpeb2 T C 5: 43,233,892 probably benign Het
Csn1s2b A G 5: 87,822,311 T134A possibly damaging Het
Cst13 A T 2: 148,823,081 probably benign Het
Cyp2c66 T A 19: 39,176,656 D360E probably damaging Het
Dhx8 A G 11: 101,738,161 S179G unknown Het
Dip2b A G 15: 100,151,360 I212V probably benign Het
Dnah9 G A 11: 66,155,531 H64Y probably benign Het
Dnal1 T C 12: 84,136,700 probably benign Het
Dse T G 10: 34,153,012 Y694S probably damaging Het
Dync2h1 T C 9: 7,051,411 I3175V probably benign Het
Elf5 A G 2: 103,449,060 N209D probably damaging Het
Elovl1 A G 4: 118,430,787 Y40C probably damaging Het
Erp27 T C 6: 136,908,152 E216G possibly damaging Het
F5 G A 1: 164,174,186 V153I probably benign Het
Fam186a G A 15: 99,944,532 T1277I possibly damaging Het
Fam90a1a A T 8: 21,963,346 H239L possibly damaging Het
Fchsd2 G T 7: 101,250,449 R334L probably damaging Het
Fermt3 T C 19: 7,002,920 Y369C probably damaging Het
Fhod3 C T 18: 25,066,338 P689S probably benign Het
Fnbp1l G T 3: 122,556,567 Q332K probably benign Het
Frem3 T C 8: 80,663,420 S1767P probably damaging Het
Ggt5 T C 10: 75,603,031 L121P probably damaging Het
Gm609 A G 16: 45,444,163 S11P probably benign Het
Gphn T C 12: 78,454,817 S119P probably damaging Het
Herc2 A G 7: 56,131,253 D1222G probably damaging Het
Hmx3 T C 7: 131,544,382 I273T possibly damaging Het
Hnrnpu A G 1: 178,332,181 probably benign Het
Hspg2 C T 4: 137,539,645 T1987I possibly damaging Het
Ighv1-22 T A 12: 114,746,451 Q58L probably damaging Het
Ighv14-3 T A 12: 114,060,255 I7F probably benign Het
Kcns3 C A 12: 11,091,783 R305L probably damaging Het
Kcnu1 C T 8: 25,910,921 A699V possibly damaging Het
Kif22 A C 7: 127,033,328 L270W probably damaging Het
Lrp2 G T 2: 69,489,298 H1960Q probably benign Het
March7 C T 2: 60,241,050 Q94* probably null Het
Mcoln3 A T 3: 146,131,204 I264F probably benign Het
Mdn1 A C 4: 32,679,572 T706P probably damaging Het
Mfsd2b A G 12: 4,867,636 C137R probably benign Het
Mmp25 A G 17: 23,644,607 V83A probably benign Het
Mocos T C 18: 24,666,434 Y242H probably benign Het
Msh6 T C 17: 87,984,806 S330P possibly damaging Het
Mtus2 T C 5: 148,298,260 S1156P possibly damaging Het
Muc5b G A 7: 141,842,379 R124H unknown Het
Mybbp1a G A 11: 72,447,971 E775K possibly damaging Het
Myo10 A G 15: 25,793,153 E1272G possibly damaging Het
Nars A G 18: 64,505,231 S254P possibly damaging Het
Ncapd2 A G 6: 125,184,518 I211T possibly damaging Het
Ncoa7 A T 10: 30,690,790 W582R probably damaging Het
Npr3 T A 15: 11,905,467 D58V possibly damaging Het
Nr3c1 G T 18: 39,428,727 T430K probably benign Het
Odf2l A G 3: 145,128,040 T111A probably benign Het
Ogdh G T 11: 6,340,600 C406F probably benign Het
Olfml2a T G 2: 38,949,010 S190A probably damaging Het
Olfr148 T C 9: 39,613,738 M57T probably damaging Het
Olfr243 A G 7: 103,716,638 T15A probably benign Het
Olfr870 T C 9: 20,171,098 I158V probably benign Het
Olfr965 G T 9: 39,719,709 V161F probably benign Het
Optn T C 2: 5,033,139 K415E probably benign Het
Perm1 C A 4: 156,220,206 S803* probably null Het
Pex14 T C 4: 148,984,085 T84A probably benign Het
Pih1d2 T A 9: 50,620,952 Y103* probably null Het
Pikfyve T A 1: 65,250,273 C1235S probably damaging Het
Polr1a A G 6: 71,917,821 N171S probably benign Het
Prrx1 A G 1: 163,254,047 S201P probably benign Het
Psme2b A T 11: 48,945,666 N151K probably benign Het
Serpinb5 A T 1: 106,872,295 T72S probably benign Het
Sgsm1 A G 5: 113,260,047 probably null Het
Sipa1l2 T C 8: 125,453,470 R1063G possibly damaging Het
Slc19a3 T C 1: 83,022,799 T166A probably benign Het
Slc5a4b T C 10: 76,075,045 Y319C possibly damaging Het
Stard3nl T A 13: 19,376,519 N29Y probably damaging Het
Sult6b2 G T 6: 142,801,695 C109* probably null Het
Tcf25 A G 8: 123,397,025 E467G possibly damaging Het
Tmem177 A T 1: 119,910,220 V243D probably benign Het
Tmem2 G A 19: 21,797,351 R119H probably benign Het
Tmem2 C T 19: 21,844,781 A1180V probably benign Het
Tspan11 T A 6: 127,943,715 C208* probably null Het
Ttc1 A G 11: 43,745,317 V33A probably benign Het
Uck1 T A 2: 32,256,034 H283L probably damaging Het
Utrn A C 10: 12,698,053 V1091G probably benign Het
Vmn1r11 A T 6: 57,137,498 H49L probably damaging Het
Vmn1r160 G T 7: 22,872,053 S277I probably benign Het
Vmn1r18 A T 6: 57,390,084 S162T probably benign Het
Vps37b A G 5: 124,010,732 L80P probably damaging Het
Wfdc3 T C 2: 164,743,086 M1V probably null Het
Wrn A T 8: 33,324,338 N116K probably benign Het
Wscd2 G T 5: 113,577,272 G391V probably damaging Het
Zcchc11 G A 4: 108,495,159 E357K probably damaging Het
Zfp286 A G 11: 62,780,602 V215A probably benign Het
Zfp568 A G 7: 30,023,277 H549R probably damaging Het
Other mutations in Top2b
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00430:Top2b APN 14 16422692 missense probably benign 0.00
IGL00730:Top2b APN 14 16389831 missense probably damaging 1.00
IGL00917:Top2b APN 14 16407354 missense probably benign 0.05
IGL01959:Top2b APN 14 16422695 missense probably benign 0.19
IGL02019:Top2b APN 14 16409965 missense probably benign 0.44
IGL02119:Top2b APN 14 16406733 missense probably damaging 1.00
IGL02136:Top2b APN 14 16407103 unclassified probably benign
IGL02148:Top2b APN 14 16400488 missense probably damaging 1.00
IGL02496:Top2b APN 14 16387335 missense probably benign
IGL02503:Top2b APN 14 16407163 missense possibly damaging 0.92
IGL02672:Top2b APN 14 16409166 unclassified probably benign
IGL02721:Top2b APN 14 16409236 missense probably damaging 1.00
IGL02886:Top2b APN 14 16365688 missense possibly damaging 0.73
IGL03252:Top2b APN 14 16393163 missense possibly damaging 0.60
R0092:Top2b UTSW 14 16409263 missense probably damaging 1.00
R0201:Top2b UTSW 14 16383174 missense probably damaging 1.00
R0390:Top2b UTSW 14 16418442 missense probably benign 0.00
R0394:Top2b UTSW 14 16413556 splice site probably null
R1159:Top2b UTSW 14 16430329 missense possibly damaging 0.81
R1424:Top2b UTSW 14 16383177 missense probably damaging 1.00
R1519:Top2b UTSW 14 16408953 splice site probably null
R1561:Top2b UTSW 14 16398993 missense possibly damaging 0.80
R1713:Top2b UTSW 14 16409823 missense probably benign 0.05
R1987:Top2b UTSW 14 16398916 missense probably damaging 0.99
R2219:Top2b UTSW 14 16409189 missense probably damaging 1.00
R2287:Top2b UTSW 14 16409189 missense probably damaging 1.00
R2422:Top2b UTSW 14 16409189 missense probably damaging 1.00
R2679:Top2b UTSW 14 16413947 missense probably damaging 1.00
R3687:Top2b UTSW 14 16409189 missense probably damaging 1.00
R3707:Top2b UTSW 14 16388447 missense probably damaging 1.00
R3810:Top2b UTSW 14 16409189 missense probably damaging 1.00
R3812:Top2b UTSW 14 16409189 missense probably damaging 1.00
R3815:Top2b UTSW 14 16409189 missense probably damaging 1.00
R3816:Top2b UTSW 14 16409189 missense probably damaging 1.00
R3818:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4023:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4025:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4026:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4133:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4157:Top2b UTSW 14 16384491 missense probably benign 0.42
R4179:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4180:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4300:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4376:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4377:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4492:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4549:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4550:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4581:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4582:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4628:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4630:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4668:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4669:Top2b UTSW 14 16409189 missense probably damaging 1.00
R4698:Top2b UTSW 14 16387331 nonsense probably null
R4769:Top2b UTSW 14 16398991 missense probably damaging 1.00
R4809:Top2b UTSW 14 16383125 missense probably benign 0.06
R4899:Top2b UTSW 14 16387313 missense probably damaging 1.00
R5035:Top2b UTSW 14 16409966 missense probably benign 0.01
R5621:Top2b UTSW 14 16387280 missense probably damaging 1.00
R5631:Top2b UTSW 14 16409882 missense probably damaging 1.00
R5685:Top2b UTSW 14 16413666 missense probably damaging 1.00
R5732:Top2b UTSW 14 16400106 missense possibly damaging 0.92
R5939:Top2b UTSW 14 16422786 missense probably damaging 0.96
R6007:Top2b UTSW 14 16423779 critical splice donor site probably null
R6087:Top2b UTSW 14 16409864 missense probably benign 0.14
R6144:Top2b UTSW 14 16423740 missense possibly damaging 0.48
R6196:Top2b UTSW 14 16409189 missense probably damaging 1.00
R6218:Top2b UTSW 14 16409189 missense probably damaging 1.00
R6229:Top2b UTSW 14 16409838 missense probably damaging 1.00
R6249:Top2b UTSW 14 16399006 missense probably damaging 1.00
R6337:Top2b UTSW 14 16399026 missense possibly damaging 0.77
R6353:Top2b UTSW 14 16416671 missense probably damaging 1.00
R6512:Top2b UTSW 14 16409854 missense possibly damaging 0.94
R6573:Top2b UTSW 14 16398991 missense probably damaging 1.00
R6614:Top2b UTSW 14 16407142 nonsense probably null
R6844:Top2b UTSW 14 16429383 missense possibly damaging 0.94
R6848:Top2b UTSW 14 16409958 missense possibly damaging 0.89
R6871:Top2b UTSW 14 16409189 missense probably damaging 1.00
R6895:Top2b UTSW 14 16413604 missense probably benign 0.06
X0028:Top2b UTSW 14 16384499 nonsense probably null
Predicted Primers PCR Primer
(F):5'- GCACTGAAGATGGGATCAACTG -3'
(R):5'- TTTGAAGTACTCTCCCTGAGC -3'

Sequencing Primer
(F):5'- CTGAAGATGGGATCAACTGAGAACTG -3'
(R):5'- TCTCCCTGAGCAGAAAAACTAAATG -3'
Posted On2015-10-08