Incidental Mutation 'R8381:Top1'
ID 646932
Institutional Source Beutler Lab
Gene Symbol Top1
Ensembl Gene ENSMUSG00000070544
Gene Name topoisomerase (DNA) I
Synonyms D130064I21Rik, Top-1
MMRRC Submission 067748-MU
Accession Numbers
Essential gene? Essential (E-score: 1.000) question?
Stock # R8381 (G1)
Quality Score 225.009
Status Not validated
Chromosome 2
Chromosomal Location 160487901-160564684 bp(+) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to G at 160545594 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Methionine to Valine at position 321 (M321V)
Ref Sequence ENSEMBL: ENSMUSP00000105094 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000109468]
AlphaFold Q04750
Predicted Effect probably null
Transcript: ENSMUST00000109468
AA Change: M321V

PolyPhen 2 Score 0.766 (Sensitivity: 0.85; Specificity: 0.92)
SMART Domains Protein: ENSMUSP00000105094
Gene: ENSMUSG00000070544
AA Change: M321V

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
Coding Region Coverage
  • 1x: 100.0%
  • 3x: 99.9%
  • 10x: 99.7%
  • 20x: 98.9%
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 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: 40 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4930579F01Rik C T 3: 137,879,282 (GRCm39) probably null Het
Actrt3 A G 3: 30,651,985 (GRCm39) *370R probably null Het
Adam34 A G 8: 44,104,847 (GRCm39) I266T possibly damaging Het
Bhlhe40 TG TGG 6: 108,641,818 (GRCm39) 254 probably null Het
Celsr2 T C 3: 108,302,952 (GRCm39) N2507S probably damaging Het
E2f8 T C 7: 48,527,710 (GRCm39) D144G probably damaging Het
Eif4enif1 T C 11: 3,177,470 (GRCm39) S346P probably damaging Het
Fbln5 A G 12: 101,728,114 (GRCm39) F270S probably benign Het
Fnip2 T A 3: 79,373,000 (GRCm39) D1026V probably damaging Het
Fubp3 G A 2: 31,482,509 (GRCm39) probably null Het
Gjb6 T C 14: 57,361,919 (GRCm39) E114G probably benign Het
Gpr160 A G 3: 30,949,930 (GRCm39) M1V probably null Het
Hey2 A G 10: 30,709,986 (GRCm39) S256P probably damaging Het
Hnrnpll A T 17: 80,337,920 (GRCm39) H590Q probably damaging Het
Ice2 T A 9: 69,317,453 (GRCm39) H192Q probably damaging Het
Ighv1-20 T A 12: 114,687,501 (GRCm39) Q81L probably benign Het
Ighv5-2 T A 12: 113,542,325 (GRCm39) H51L probably benign Het
Jkampl A T 6: 73,445,895 (GRCm39) V218E probably damaging Het
Kif27 T C 13: 58,438,991 (GRCm39) D1190G probably benign Het
Klk1b1 C T 7: 43,619,767 (GRCm39) R109C possibly damaging Het
Mettl14 A G 3: 123,168,447 (GRCm39) Y198H probably damaging Het
Nlrp6 C T 7: 140,503,754 (GRCm39) A620V possibly damaging Het
Obsl1 G T 1: 75,480,501 (GRCm39) F374L possibly damaging Het
Or51b6 T C 7: 103,556,146 (GRCm39) F164L Het
Or5h22 A G 16: 58,895,225 (GRCm39) S73P probably damaging Het
Or8h10 T C 2: 86,808,373 (GRCm39) I256V probably benign Het
Pcbp4 G A 9: 106,338,488 (GRCm39) A138T probably damaging Het
Pramel52-ps C T 5: 94,531,881 (GRCm39) T255I probably damaging Het
Rnf17 TG T 14: 56,661,999 (GRCm39) 132 probably null Het
Robo3 T A 9: 37,341,056 (GRCm39) D72V probably damaging Het
Slc16a5 A G 11: 115,360,716 (GRCm39) S300G probably benign Het
Smg6 C T 11: 74,822,566 (GRCm39) R670W probably damaging Het
Smok3c C T 5: 138,063,824 (GRCm39) T437I probably benign Het
Stk36 A G 1: 74,672,333 (GRCm39) I931V probably benign Het
Syk T C 13: 52,787,085 (GRCm39) Y383H probably benign Het
Tacc2 T A 7: 130,225,972 (GRCm39) S886T probably benign Het
Ttc17 A G 2: 94,132,166 (GRCm39) L598P probably damaging Het
Xdh T G 17: 74,219,456 (GRCm39) I648L probably benign Het
Zfhx4 A C 3: 5,447,676 (GRCm39) K1126T probably benign Het
Zfp729b T C 13: 67,739,617 (GRCm39) T883A 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
R0022:Top1 UTSW 2 160,544,719 (GRCm39) missense possibly damaging 0.62
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
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'- ATTGAGGTTGGCTTCCCTTC -3'
(R):5'- AGCTGCCAGTTAGCACAAC -3'

Sequencing Primer
(F):5'- GAGGTTGGCTTCCCTTCTAGACAC -3'
(R):5'- TGCCAGTTAGCACAACACATACATG -3'
Posted On 2020-09-02