Incidental Mutation 'R1386:Top3b'
ID 162381
Institutional Source Beutler Lab
Gene Symbol Top3b
Ensembl Gene ENSMUSG00000022779
Gene Name topoisomerase (DNA) III beta
Synonyms Topo III beta
MMRRC Submission 039448-MU
Accession Numbers
Essential gene? Probably non essential (E-score: 0.223) question?
Stock # R1386 (G1)
Quality Score 225
Status Not validated
Chromosome 16
Chromosomal Location 16870736-16892990 bp(+) (GRCm38)
Type of Mutation missense
DNA Base Change (assembly) T to C at 16880629 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Valine to Alanine at position 112 (V112A)
Ref Sequence ENSEMBL: ENSMUSP00000118897 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000023465] [ENSMUST00000119787] [ENSMUST00000124960] [ENSMUST00000139740] [ENSMUST00000156502] [ENSMUST00000231812] [ENSMUST00000232017] [ENSMUST00000232080] [ENSMUST00000232581] [ENSMUST00000232231] [ENSMUST00000232200] [ENSMUST00000232547]
AlphaFold Q9Z321
Predicted Effect probably benign
Transcript: ENSMUST00000023465
AA Change: V112A

PolyPhen 2 Score 0.024 (Sensitivity: 0.95; Specificity: 0.81)
SMART Domains Protein: ENSMUSP00000023465
Gene: ENSMUSG00000022779
AA Change: V112A

DomainStartEndE-ValueType
TOPRIM 3 138 2.64e-27 SMART
TOP1Bc 146 242 3.84e-38 SMART
TOP1Ac 289 545 2.28e-104 SMART
low complexity region 824 850 N/A INTRINSIC
Predicted Effect noncoding transcript
Transcript: ENSMUST00000118424
Predicted Effect probably benign
Transcript: ENSMUST00000119787
AA Change: V112A

PolyPhen 2 Score 0.024 (Sensitivity: 0.95; Specificity: 0.81)
SMART Domains Protein: ENSMUSP00000112913
Gene: ENSMUSG00000022779
AA Change: V112A

DomainStartEndE-ValueType
TOPRIM 3 138 2.64e-27 SMART
TOP1Bc 146 242 3.84e-38 SMART
TOP1Ac 289 545 2.28e-104 SMART
low complexity region 824 850 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000124960
AA Change: V112A

PolyPhen 2 Score 0.295 (Sensitivity: 0.91; Specificity: 0.89)
SMART Domains Protein: ENSMUSP00000118897
Gene: ENSMUSG00000022779
AA Change: V112A

DomainStartEndE-ValueType
TOPRIM 3 118 3.89e-7 SMART
Predicted Effect noncoding transcript
Transcript: ENSMUST00000125202
Predicted Effect noncoding transcript
Transcript: ENSMUST00000135597
Predicted Effect noncoding transcript
Transcript: ENSMUST00000138618
Predicted Effect probably benign
Transcript: ENSMUST00000139740
AA Change: V112A

PolyPhen 2 Score 0.024 (Sensitivity: 0.95; Specificity: 0.81)
SMART Domains Protein: ENSMUSP00000118398
Gene: ENSMUSG00000022779
AA Change: V112A

DomainStartEndE-ValueType
TOPRIM 3 138 2.64e-27 SMART
TOP1Bc 146 242 3.84e-38 SMART
Predicted Effect noncoding transcript
Transcript: ENSMUST00000147531
Predicted Effect noncoding transcript
Transcript: ENSMUST00000150424
Predicted Effect probably benign
Transcript: ENSMUST00000156502
AA Change: V112A

PolyPhen 2 Score 0.024 (Sensitivity: 0.95; Specificity: 0.81)
SMART Domains Protein: ENSMUSP00000115491
Gene: ENSMUSG00000022779
AA Change: V112A

DomainStartEndE-ValueType
TOPRIM 3 138 2.64e-27 SMART
TOP1Bc 146 234 4.29e-27 SMART
Predicted Effect noncoding transcript
Transcript: ENSMUST00000231278
Predicted Effect noncoding transcript
Transcript: ENSMUST00000231576
Predicted Effect probably benign
Transcript: ENSMUST00000231812
Predicted Effect probably benign
Transcript: ENSMUST00000232017
AA Change: V112A

PolyPhen 2 Score 0.024 (Sensitivity: 0.95; Specificity: 0.81)
Predicted Effect probably benign
Transcript: ENSMUST00000232080
AA Change: V112A

PolyPhen 2 Score 0.024 (Sensitivity: 0.95; Specificity: 0.81)
Predicted Effect probably benign
Transcript: ENSMUST00000232581
AA Change: V112A

PolyPhen 2 Score 0.024 (Sensitivity: 0.95; Specificity: 0.81)
Predicted Effect probably benign
Transcript: ENSMUST00000232231
AA Change: V112A

PolyPhen 2 Score 0.024 (Sensitivity: 0.95; Specificity: 0.81)
Predicted Effect probably benign
Transcript: ENSMUST00000232200
Predicted Effect noncoding transcript
Transcript: ENSMUST00000232380
Predicted Effect noncoding transcript
Transcript: ENSMUST00000232523
Predicted Effect noncoding transcript
Transcript: ENSMUST00000232656
Predicted Effect noncoding transcript
Transcript: ENSMUST00000232531
Predicted Effect probably benign
Transcript: ENSMUST00000232117
Predicted Effect probably benign
Transcript: ENSMUST00000232547
Coding Region Coverage
  • 1x: 98.8%
  • 3x: 97.8%
  • 10x: 94.5%
  • 20x: 87.0%
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 enzyme catalyzes the transient breaking and rejoining of a single strand of DNA which allows the strands to pass through one another, thus relaxing the supercoils and altering the topology of DNA. The enzyme interacts with DNA helicase SGS1 and plays a role in DNA recombination, cellular aging and maintenance of genome stability. Low expression of this gene may be related to higher survival rates in breast cancer patients. This gene has a pseudogene on chromosome 22. Alternate splicing results in multiple transcript variants. Additional alternatively spliced transcript variants of this gene have been described, but their full-length nature is not known. [provided by RefSeq, Aug 2013]
PHENOTYPE: Homozygous null mice develop to maturity but die prematurely showing enlargement of lymphatic organs and glomerulonephritis. Intercrossing of mutant mice progressively results in infertility that is correlated to increased aneuploidy in germ cells. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 103 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Abca6 T C 11: 110,244,255 (GRCm38) I235V probably benign Het
Acsm4 T C 7: 119,698,578 (GRCm38) I146T probably benign Het
Adgrv1 T C 13: 81,528,865 (GRCm38) N1949S probably benign Het
Afdn T C 17: 13,846,536 (GRCm38) V630A probably damaging Het
Amfr A G 8: 93,985,399 (GRCm38) V301A possibly damaging Het
Anapc16 T C 10: 59,996,457 (GRCm38) M45V probably benign Het
Ankrd12 T C 17: 65,983,380 (GRCm38) E1686G possibly damaging Het
Ap2m1 T G 16: 20,541,229 (GRCm38) H193Q probably damaging Het
Aplnr T C 2: 85,137,461 (GRCm38) W277R possibly damaging Het
Aspm C T 1: 139,478,972 (GRCm38) H1866Y possibly damaging Het
Aspm A G 1: 139,457,623 (GRCm38) E335G probably benign Het
Atp8b4 T A 2: 126,378,744 (GRCm38) D578V probably benign Het
Ccr1 T A 9: 123,963,962 (GRCm38) E177V probably benign Het
Cecr2 A G 6: 120,762,131 (GRCm38) E1245G probably damaging Het
Cep162 A T 9: 87,221,202 (GRCm38) C638S probably benign Het
Ces1b A T 8: 93,068,077 (GRCm38) I298N probably benign Het
Chdh T A 14: 30,031,434 (GRCm38) L100Q probably damaging Het
Chrnd T C 1: 87,192,590 (GRCm38) I156T probably damaging Het
Clpx G A 9: 65,326,888 (GRCm38) R605Q probably null Het
Cnga1 T A 5: 72,612,183 (GRCm38) K135* probably null Het
Col6a4 A T 9: 106,062,945 (GRCm38) V1262E probably benign Het
Cracr2b T C 7: 141,463,568 (GRCm38) L53P probably damaging Het
Crhr1 T C 11: 104,174,394 (GRCm38) S372P possibly damaging Het
Cyp11b2 T A 15: 74,851,775 (GRCm38) probably null Het
Cyp21a1 T A 17: 34,802,210 (GRCm38) D373V probably damaging Het
D6Ertd527e C G 6: 87,111,524 (GRCm38) T223S unknown Het
Ddah1 A T 3: 145,889,211 (GRCm38) Y242F probably benign Het
Dlgap3 A G 4: 127,194,926 (GRCm38) D105G possibly damaging Het
Dtl A G 1: 191,569,717 (GRCm38) V76A probably damaging Het
Dzank1 A G 2: 144,491,831 (GRCm38) S361P probably benign Het
Ehd3 T A 17: 73,820,543 (GRCm38) I157N probably damaging Het
Elk4 T C 1: 132,017,830 (GRCm38) F149L probably damaging Het
Eme2 G A 17: 24,892,918 (GRCm38) S263F probably damaging Het
Fam83a A G 15: 57,986,503 (GRCm38) R148G probably damaging Het
Farp2 C A 1: 93,620,151 (GRCm38) probably null Het
Fbxw25 T A 9: 109,654,641 (GRCm38) I168F possibly damaging Het
Fermt1 T C 2: 132,916,058 (GRCm38) D479G probably damaging Het
Fgf17 C A 14: 70,636,770 (GRCm38) R193L probably damaging Het
Foxred2 T G 15: 77,948,521 (GRCm38) probably null Het
Gad1 T C 2: 70,574,123 (GRCm38) V119A possibly damaging Het
Gas2l3 A G 10: 89,414,353 (GRCm38) V301A possibly damaging Het
Gimap8 G A 6: 48,656,653 (GRCm38) V469I probably benign Het
Gja1 A T 10: 56,387,969 (GRCm38) E141D probably benign Het
Glod4 C T 11: 76,222,003 (GRCm38) W268* probably null Het
Gm7173 C T X: 79,509,901 (GRCm38) V323I possibly damaging Het
Guf1 C T 5: 69,563,162 (GRCm38) H309Y probably benign Het
Hax1 A G 3: 89,995,849 (GRCm38) V215A probably damaging Het
Heatr9 T C 11: 83,518,825 (GRCm38) D107G probably benign Het
Hephl1 T A 9: 15,076,754 (GRCm38) Y686F probably benign Het
Hk3 T C 13: 55,007,030 (GRCm38) probably null Het
Ikbkb G T 8: 22,665,617 (GRCm38) Q620K possibly damaging Het
Il18rap C T 1: 40,531,522 (GRCm38) A208V probably benign Het
Kif26b T C 1: 178,915,644 (GRCm38) S1102P probably benign Het
Kif5b A T 18: 6,226,383 (GRCm38) D147E probably damaging Het
Klhl3 T C 13: 58,030,433 (GRCm38) T348A probably damaging Het
Krt10 T C 11: 99,385,920 (GRCm38) probably benign Het
Lama3 A T 18: 12,477,370 (GRCm38) H1124L probably benign Het
Lin7a A T 10: 107,412,122 (GRCm38) Q96L unknown Het
Ly6c2 T G 15: 75,110,589 (GRCm38) I37L probably benign Het
Mov10l1 A G 15: 89,011,386 (GRCm38) Y585C possibly damaging Het
Msr1 G A 8: 39,589,293 (GRCm38) Q414* probably null Het
Myh13 T C 11: 67,370,950 (GRCm38) C1900R possibly damaging Het
Obscn T A 11: 59,133,853 (GRCm38) N454Y probably damaging Het
Olfml2b T G 1: 170,681,162 (GRCm38) Y530D probably damaging Het
Olfr1057 A G 2: 86,374,921 (GRCm38) F164L probably damaging Het
Olfr1206 T A 2: 88,865,353 (GRCm38) F249L probably benign Het
Olfr1377 T C 11: 50,985,367 (GRCm38) F222S probably damaging Het
Olfr1449 A T 19: 12,935,139 (GRCm38) T134S probably benign Het
Olfr591 T A 7: 103,173,367 (GRCm38) H90L probably benign Het
Olfr868 T A 9: 20,101,582 (GRCm38) N274K probably benign Het
Pde10a T G 17: 8,953,742 (GRCm38) V648G probably damaging Het
Pde7b T A 10: 20,418,801 (GRCm38) H258L probably damaging Het
Pik3cb A G 9: 99,064,027 (GRCm38) V582A possibly damaging Het
Plxnb1 T C 9: 109,101,023 (GRCm38) S316P probably benign Het
Pmpca C T 2: 26,392,518 (GRCm38) T246I probably damaging Het
Reep3 A T 10: 67,063,009 (GRCm38) V32D possibly damaging Het
Rfx4 A G 10: 84,863,285 (GRCm38) M252V probably damaging Het
Rnf168 C A 16: 32,298,963 (GRCm38) D447E probably damaging Het
Rnf31 T C 14: 55,596,764 (GRCm38) V518A probably damaging Het
Rnpc3 A T 3: 113,613,784 (GRCm38) L340* probably null Het
Scn2a A G 2: 65,688,741 (GRCm38) E437G probably damaging Het
Scnn1b C A 7: 121,902,488 (GRCm38) N175K possibly damaging Het
Slc39a11 T A 11: 113,247,724 (GRCm38) I344F probably benign Het
Slc9a2 T A 1: 40,719,018 (GRCm38) L239Q probably damaging Het
Smg5 T C 3: 88,355,671 (GRCm38) F794L probably damaging Het
Smim13 C T 13: 41,272,692 (GRCm38) S68L possibly damaging Het
Sos2 A T 12: 69,614,658 (GRCm38) Y680N probably damaging Het
Spag6 T A 2: 18,734,246 (GRCm38) M329K possibly damaging Het
Spire2 G A 8: 123,361,366 (GRCm38) probably null Het
Tdrd9 T A 12: 112,044,804 (GRCm38) V1149D probably benign Het
Tns3 T A 11: 8,518,261 (GRCm38) Y321F probably benign Het
Trafd1 G A 5: 121,379,652 (GRCm38) T26I probably damaging Het
Ttc28 G A 5: 111,225,677 (GRCm38) S962N probably damaging Het
Vmn2r78 T C 7: 86,915,407 (GRCm38) L20S unknown Het
Vmn2r82 A T 10: 79,378,711 (GRCm38) D176V probably damaging Het
Vps13b T C 15: 35,923,312 (GRCm38) F3778L probably damaging Het
Vwa3b T C 1: 37,051,881 (GRCm38) probably null Het
Vwc2 C T 11: 11,154,262 (GRCm38) P265S probably damaging Het
Zbtb9 T A 17: 26,974,638 (GRCm38) I339N probably damaging Het
Zfp335 T C 2: 164,898,241 (GRCm38) T764A probably benign Het
Zfp366 T A 13: 99,246,555 (GRCm38) V742D probably damaging Het
Zfp709 A T 8: 71,890,662 (GRCm38) Y645F probably damaging Het
Zmym2 T A 14: 56,913,091 (GRCm38) C424S probably damaging Het
Other mutations in Top3b
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00823:Top3b APN 16 16,887,622 (GRCm38) missense probably damaging 0.97
IGL01512:Top3b APN 16 16,891,422 (GRCm38) missense possibly damaging 0.74
IGL01552:Top3b APN 16 16,887,823 (GRCm38) splice site probably benign
IGL01738:Top3b APN 16 16,880,604 (GRCm38) missense probably benign 0.04
IGL02090:Top3b APN 16 16,891,470 (GRCm38) missense possibly damaging 0.81
R0143:Top3b UTSW 16 16,883,525 (GRCm38) missense probably damaging 0.97
R0883:Top3b UTSW 16 16,879,437 (GRCm38) splice site probably benign
R1440:Top3b UTSW 16 16,892,777 (GRCm38) nonsense probably null
R1958:Top3b UTSW 16 16,884,302 (GRCm38) missense possibly damaging 0.52
R1970:Top3b UTSW 16 16,883,519 (GRCm38) missense probably damaging 1.00
R4211:Top3b UTSW 16 16,882,532 (GRCm38) splice site probably null
R4292:Top3b UTSW 16 16,883,519 (GRCm38) missense probably damaging 1.00
R4307:Top3b UTSW 16 16,889,617 (GRCm38) splice site probably benign
R4832:Top3b UTSW 16 16,890,662 (GRCm38) nonsense probably null
R5047:Top3b UTSW 16 16,891,418 (GRCm38) missense probably benign 0.00
R5364:Top3b UTSW 16 16,886,970 (GRCm38) missense probably benign 0.00
R5590:Top3b UTSW 16 16,891,577 (GRCm38) intron probably benign
R5604:Top3b UTSW 16 16,889,535 (GRCm38) nonsense probably null
R5719:Top3b UTSW 16 16,885,836 (GRCm38) missense probably damaging 1.00
R5969:Top3b UTSW 16 16,883,565 (GRCm38) critical splice donor site probably null
R6018:Top3b UTSW 16 16,892,892 (GRCm38) missense probably damaging 1.00
R6144:Top3b UTSW 16 16,879,141 (GRCm38) splice site probably null
R6155:Top3b UTSW 16 16,891,509 (GRCm38) missense probably damaging 1.00
R6341:Top3b UTSW 16 16,879,071 (GRCm38) missense probably damaging 0.98
R6700:Top3b UTSW 16 16,892,669 (GRCm38) missense possibly damaging 0.48
R7417:Top3b UTSW 16 16,877,850 (GRCm38) start gained probably benign
R7586:Top3b UTSW 16 16,891,368 (GRCm38) missense probably benign 0.44
R7747:Top3b UTSW 16 16,887,721 (GRCm38) missense probably benign 0.17
R8382:Top3b UTSW 16 16,888,003 (GRCm38) missense probably damaging 1.00
R8438:Top3b UTSW 16 16,891,500 (GRCm38) missense probably benign 0.04
R9142:Top3b UTSW 16 16,883,435 (GRCm38) missense probably damaging 1.00
R9311:Top3b UTSW 16 16,882,699 (GRCm38) critical splice donor site probably null
R9630:Top3b UTSW 16 16,892,490 (GRCm38) missense probably benign 0.03
X0011:Top3b UTSW 16 16,890,189 (GRCm38) missense probably benign 0.00
Predicted Primers PCR Primer
(F):5'- ACAGCCTCGCTGTAGACTGCTTCTTG -3'
(R):5'- TGAAACTTGCACCCACCCAGAATGG -3'

Sequencing Primer
(F):5'- TGTAGACTGCTTCTTGCTCAG -3'
(R):5'- cagaggagggcatcagatac -3'
Posted On 2014-03-17