Incidental Mutation 'R0022:Top1'
ID 64784
Institutional Source Beutler Lab
Gene Symbol Top1
Ensembl Gene ENSMUSG00000070544
Gene Name topoisomerase (DNA) I
Synonyms D130064I21Rik, Top-1
MMRRC Submission 038317-MU
Accession Numbers
Essential gene? Essential (E-score: 1.000) question?
Stock # R0022 (G1)
Quality Score 180
Status Validated
Chromosome 2
Chromosomal Location 160487901-160564684 bp(+) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to C at 160544719 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Lysine to Asparagine at position 278 (K278N)
Ref Sequence ENSEMBL: ENSMUSP00000105094 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000109468]
AlphaFold Q04750
Predicted Effect possibly damaging
Transcript: ENSMUST00000109468
AA Change: K278N

PolyPhen 2 Score 0.616 (Sensitivity: 0.87; Specificity: 0.91)
SMART Domains Protein: ENSMUSP00000105094
Gene: ENSMUSG00000070544
AA Change: K278N

DomainStartEndE-ValueType
low complexity region 20 95 N/A INTRINSIC
low complexity region 150 211 N/A INTRINSIC
Blast:TOPEUc 245 321 9e-19 BLAST
low complexity region 323 339 N/A INTRINSIC
TOPEUc 362 739 4.43e-280 SMART
Predicted Effect noncoding transcript
Transcript: ENSMUST00000164510
Meta Mutation Damage Score 0.0636 question?
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.6%
  • 10x: 97.0%
  • 20x: 93.8%
Validation Efficiency 100% (68/68)
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 altering the topology of DNA. This gene is localized to chromosome 20 and has pseudogenes which reside on chromosomes 1 and 22. [provided by RefSeq, Jul 2008]
PHENOTYPE: A homozygous mutation resulted in early embryonic lethality at the 4 to 16 cell stage of development. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 57 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Agl A T 3: 116,587,485 (GRCm39) probably null Het
Arhgap29 G A 3: 121,782,586 (GRCm39) V91I possibly damaging Het
Aste1 T A 9: 105,273,823 (GRCm39) L21* probably null Het
Bpifb5 A T 2: 154,072,268 (GRCm39) D325V probably damaging Het
Btbd10 G A 7: 112,924,988 (GRCm39) Q287* probably null Het
Cdc20 T A 4: 118,292,686 (GRCm39) H354L probably damaging Het
Cdhr3 G A 12: 33,132,263 (GRCm39) T120I probably damaging Het
Col5a2 G A 1: 45,422,843 (GRCm39) R1125* probably null Het
Col9a3 A G 2: 180,261,549 (GRCm39) D613G probably damaging Het
Coro7 C T 16: 4,451,168 (GRCm39) R507H probably benign Het
Cracdl C T 1: 37,667,326 (GRCm39) R240Q probably damaging Het
Crebbp A T 16: 3,903,092 (GRCm39) V2049E probably damaging Het
Cryga T C 1: 65,142,382 (GRCm39) I4V probably damaging Het
D930020B18Rik A G 10: 121,507,675 (GRCm39) T138A probably damaging Het
Dclre1b G T 3: 103,710,464 (GRCm39) H482Q probably benign Het
Dpy19l2 A G 9: 24,607,420 (GRCm39) S14P probably benign Het
Elavl3 C A 9: 21,948,167 (GRCm39) probably benign Het
Ephb6 T C 6: 41,591,503 (GRCm39) V220A probably damaging Het
Exoc7 A T 11: 116,188,408 (GRCm39) I297N possibly damaging Het
Gdpd4 A T 7: 97,632,082 (GRCm39) N332Y probably damaging Het
Ggct C A 6: 54,962,887 (GRCm39) E175* probably null Het
Gm5316 T C 6: 122,877,354 (GRCm39) noncoding transcript Het
Hoxa7 T C 6: 52,194,363 (GRCm39) N8S probably damaging Het
Ifi208 A G 1: 173,510,612 (GRCm39) T256A possibly damaging Het
Il12rb2 A G 6: 67,275,903 (GRCm39) F630S probably damaging Het
Kit A G 5: 75,783,657 (GRCm39) N378S probably benign Het
Lmntd1 T A 6: 145,375,716 (GRCm39) Y74F probably benign Het
Lrp1b A T 2: 40,888,050 (GRCm39) probably benign Het
Ltbp1 T A 17: 75,671,355 (GRCm39) V1194D probably damaging Het
Mc5r T G 18: 68,471,853 (GRCm39) S71A probably benign Het
Mcm7 T C 5: 138,162,981 (GRCm39) *390W probably null Het
Myo18a T C 11: 77,734,059 (GRCm39) probably null Het
Naa25 C A 5: 121,556,039 (GRCm39) L276M probably damaging Het
Nlrp1a T G 11: 71,014,207 (GRCm39) T348P probably damaging Het
Nlrp1b T G 11: 71,052,755 (GRCm39) K888T possibly damaging Het
Or4f53 A G 2: 111,087,994 (GRCm39) Y178C probably benign Het
Pabpc6 A T 17: 9,888,145 (GRCm39) N135K probably benign Het
Pdzd2 G A 15: 12,371,691 (GRCm39) A2568V possibly damaging Het
Pik3r2 A G 8: 71,223,545 (GRCm39) F346S probably damaging Het
Pkd1 T C 17: 24,813,793 (GRCm39) W4086R probably damaging Het
Plekhb2 G A 1: 34,905,320 (GRCm39) probably benign Het
Plxnb2 A G 15: 89,047,479 (GRCm39) probably null Het
Pmfbp1 C T 8: 110,252,039 (GRCm39) R395W probably damaging Het
Pnldc1 A G 17: 13,109,006 (GRCm39) Y497H probably damaging Het
Ppp1ca T G 19: 4,244,580 (GRCm39) V213G possibly damaging Het
Rapgef2 G A 3: 78,995,207 (GRCm39) R814C probably damaging Het
Relch T A 1: 105,619,627 (GRCm39) probably benign Het
Rnasel A T 1: 153,636,521 (GRCm39) I634F probably damaging Het
Rnf157 A T 11: 116,240,276 (GRCm39) probably benign Het
Ryr3 A G 2: 112,471,011 (GRCm39) S4567P probably damaging Het
Smcr8 T A 11: 60,671,185 (GRCm39) W778R probably damaging Het
Stat1 T A 1: 52,179,789 (GRCm39) L333Q probably damaging Het
Strc A G 2: 121,198,874 (GRCm39) L1391P probably damaging Het
Tek G A 4: 94,725,509 (GRCm39) V592M probably damaging Het
Utrn C T 10: 12,585,700 (GRCm39) probably benign Het
Wdr7 T C 18: 63,910,705 (GRCm39) I699T probably damaging Het
Zfp30 A G 7: 29,491,860 (GRCm39) E119G possibly damaging Het
Other mutations in Top1
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL02168:Top1 APN 2 160,546,893 (GRCm39) splice site probably null
IGL03083:Top1 APN 2 160,545,498 (GRCm39) missense probably damaging 0.97
IGL03242:Top1 APN 2 160,557,653 (GRCm39) missense probably damaging 1.00
IGL03369:Top1 APN 2 160,535,647 (GRCm39) missense unknown
Mainspring UTSW 2 160,556,158 (GRCm39) missense probably damaging 0.98
Taut UTSW 2 160,562,921 (GRCm39) missense probably damaging 0.99
unwind UTSW 2 160,546,739 (GRCm39) missense probably damaging 1.00
R0449:Top1 UTSW 2 160,554,628 (GRCm39) nonsense probably null
R0501:Top1 UTSW 2 160,556,079 (GRCm39) missense probably damaging 1.00
R0564:Top1 UTSW 2 160,556,185 (GRCm39) missense probably damaging 0.98
R0946:Top1 UTSW 2 160,554,588 (GRCm39) nonsense probably null
R0972:Top1 UTSW 2 160,562,945 (GRCm39) missense probably damaging 1.00
R0976:Top1 UTSW 2 160,559,343 (GRCm39) missense possibly damaging 0.86
R1534:Top1 UTSW 2 160,556,152 (GRCm39) missense probably damaging 1.00
R1608:Top1 UTSW 2 160,545,515 (GRCm39) missense probably benign 0.01
R1655:Top1 UTSW 2 160,545,616 (GRCm39) critical splice donor site probably null
R1818:Top1 UTSW 2 160,557,643 (GRCm39) missense probably damaging 1.00
R1937:Top1 UTSW 2 160,512,042 (GRCm39) missense unknown
R2055:Top1 UTSW 2 160,544,748 (GRCm39) splice site probably benign
R2104:Top1 UTSW 2 160,546,739 (GRCm39) missense probably damaging 1.00
R3705:Top1 UTSW 2 160,544,744 (GRCm39) critical splice donor site probably null
R3769:Top1 UTSW 2 160,563,442 (GRCm39) missense probably damaging 1.00
R3770:Top1 UTSW 2 160,563,442 (GRCm39) missense probably damaging 1.00
R3801:Top1 UTSW 2 160,544,688 (GRCm39) missense probably damaging 1.00
R3804:Top1 UTSW 2 160,544,688 (GRCm39) missense probably damaging 1.00
R3928:Top1 UTSW 2 160,529,669 (GRCm39) splice site probably benign
R4598:Top1 UTSW 2 160,562,885 (GRCm39) missense possibly damaging 0.89
R4651:Top1 UTSW 2 160,554,637 (GRCm39) missense probably damaging 1.00
R4652:Top1 UTSW 2 160,554,637 (GRCm39) missense probably damaging 1.00
R4742:Top1 UTSW 2 160,545,490 (GRCm39) critical splice acceptor site probably null
R5523:Top1 UTSW 2 160,544,695 (GRCm39) nonsense probably null
R6292:Top1 UTSW 2 160,540,061 (GRCm39) missense probably benign 0.19
R6724:Top1 UTSW 2 160,554,616 (GRCm39) missense probably damaging 1.00
R7354:Top1 UTSW 2 160,546,878 (GRCm39) missense probably damaging 1.00
R7461:Top1 UTSW 2 160,554,762 (GRCm39) splice site probably null
R7843:Top1 UTSW 2 160,556,176 (GRCm39) missense possibly damaging 0.90
R7855:Top1 UTSW 2 160,556,008 (GRCm39) missense probably damaging 1.00
R8100:Top1 UTSW 2 160,540,155 (GRCm39) nonsense probably null
R8302:Top1 UTSW 2 160,545,496 (GRCm39) missense probably damaging 1.00
R8377:Top1 UTSW 2 160,488,009 (GRCm39) start gained probably benign
R8380:Top1 UTSW 2 160,559,315 (GRCm39) missense probably benign 0.00
R8381:Top1 UTSW 2 160,545,594 (GRCm39) missense probably null 0.77
R8392:Top1 UTSW 2 160,559,374 (GRCm39) nonsense probably null
R8713:Top1 UTSW 2 160,559,360 (GRCm39) missense probably damaging 0.98
R8773:Top1 UTSW 2 160,556,158 (GRCm39) missense probably damaging 0.98
R8844:Top1 UTSW 2 160,563,469 (GRCm39) missense probably damaging 1.00
R8949:Top1 UTSW 2 160,547,182 (GRCm39) missense possibly damaging 0.77
R8992:Top1 UTSW 2 160,562,921 (GRCm39) missense probably damaging 0.99
R9133:Top1 UTSW 2 160,545,591 (GRCm39) nonsense probably null
R9799:Top1 UTSW 2 160,563,406 (GRCm39) missense probably damaging 1.00
X0027:Top1 UTSW 2 160,563,438 (GRCm39) nonsense probably null
Predicted Primers PCR Primer
(F):5'- TGTTATCACTGTGTGTCAGCAGACC -3'
(R):5'- TGCAGAAACAATGCTTCCTTTGCTC -3'

Sequencing Primer
(F):5'- AGCAGACCTTTGTACACCTTGG -3'
(R):5'- CTGTTTAACCTAATCTGATAAGCTCC -3'
Posted On 2013-08-06