Incidental Mutation 'R2422:Top2b'
ID249392
Institutional Source Beutler Lab
Gene Symbol Top2b
Ensembl Gene ENSMUSG00000017485
Gene Nametopoisomerase (DNA) II beta
SynonymsD230016L12Rik, Top-2
MMRRC Submission 040384-MU
Accession Numbers
Is this an essential gene? Probably essential (E-score: 0.942) question?
Stock #R2422 (G1)
Quality Score225
Status 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 0.8018 question?
Coding Region Coverage
  • 1x: 99.1%
  • 3x: 98.5%
  • 10x: 97.1%
  • 20x: 94.5%
Validation Efficiency 99% (77/78)
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: 77 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
2010300C02Rik C A 1: 37,613,475 V1084L probably benign Het
4933409G03Rik A T 2: 68,591,520 N47I probably benign Het
Actr5 T C 2: 158,636,081 F457S probably damaging Het
Adamts3 A G 5: 89,683,175 S1007P probably damaging Het
Adck2 C T 6: 39,583,998 A440V possibly damaging Het
Birc6 T A 17: 74,660,614 L301Q probably damaging Het
Ccdc18 A C 5: 108,228,588 E1298D probably damaging Het
Ccdc77 A G 6: 120,339,159 C186R probably benign Het
Cdk12 T G 11: 98,219,074 S640R probably benign Het
Cdv3 T C 9: 103,365,118 probably benign Het
Celf2 G A 2: 6,553,889 T364I probably damaging Het
Cmtr2 C A 8: 110,222,781 S574R probably benign Het
Col14a1 T C 15: 55,449,922 L56P unknown Het
Dctn1 C T 6: 83,199,800 L1241F possibly damaging Het
Depdc5 T C 5: 32,991,035 F1505S probably damaging Het
Dhcr24 G T 4: 106,561,094 probably benign Het
Dnajc21 A G 15: 10,461,935 S127P probably benign Het
Entpd7 A T 19: 43,728,088 Y507F possibly damaging Het
Fbp1 T C 13: 62,871,306 K24E probably benign Het
Galr1 A T 18: 82,405,923 N76K probably damaging Het
Glrb A G 3: 80,860,235 I226T probably damaging Het
Gm17421 T A 12: 113,369,487 noncoding transcript Het
Gm4950 T A 18: 51,865,784 Q33L probably benign Het
Gm5415 C T 1: 32,545,861 A323T possibly damaging Het
Gm6583 A T 5: 112,355,118 V240D probably damaging Het
Gnat2 A T 3: 108,095,539 M88L probably damaging Het
Gpr183 A G 14: 121,954,177 Y311H probably damaging Het
H2-M10.5 A G 17: 36,774,999 I308V probably benign Het
Hipk3 C T 2: 104,471,485 G121R probably benign Het
Hjurp A G 1: 88,266,561 probably benign Het
Homez C A 14: 54,857,574 V226F probably benign Het
Inf2 C A 12: 112,610,824 A1034D unknown Het
Kcnc4 G T 3: 107,445,547 P572T probably benign Het
Kmt2d T C 15: 98,862,266 E1037G unknown Het
Krt78 T C 15: 101,947,264 E704G probably damaging Het
Lama1 A T 17: 67,750,553 M541L probably benign Het
Lmbrd2 C T 15: 9,194,765 T618M possibly damaging Het
Ly6g6e G A 17: 35,078,146 R121Q probably benign Het
Mettl22 T C 16: 8,487,361 F293L probably damaging Het
Mib1 T C 18: 10,751,906 S263P probably damaging Het
Ndufaf1 T C 2: 119,655,737 E298G probably damaging Het
Nek1 T C 8: 61,019,901 V152A probably damaging Het
Nlrp4d T A 7: 10,362,945 D876V probably benign Het
Olfr178 T C 16: 58,889,965 E85G probably benign Het
Olfr235 A T 19: 12,268,919 T230S probably damaging Het
Olfr740 T C 14: 50,453,436 L128P probably damaging Het
Olfr975 A G 9: 39,950,528 L81P possibly damaging Het
Pcdha11 G T 18: 37,007,272 L651F probably damaging Het
Plekhg1 G A 10: 3,958,048 M988I probably benign Het
Plxnb1 G A 9: 109,108,438 R1169H probably benign Het
Ppp4r3a A G 12: 101,042,653 probably benign Het
Pum2 A T 12: 8,748,931 Q930L possibly damaging Het
Rbp4 T C 19: 38,124,344 E67G probably damaging Het
Rgs9 C A 11: 109,225,777 probably null Het
Sipa1 A T 19: 5,652,112 D923E possibly damaging Het
Smc1a A G X: 152,047,975 probably benign Het
Snx33 C A 9: 56,918,538 M546I probably benign Het
Spag17 T A 3: 100,027,619 W714R probably benign Het
Spata2 C T 2: 167,484,206 R231Q probably damaging Het
Stard9 C T 2: 120,700,284 R2341C probably benign Het
Tas2r116 A T 6: 132,855,594 I53F possibly damaging Het
Tlk1 T C 2: 70,770,005 E110G probably damaging Het
Tmem102 T A 11: 69,804,537 E203V probably benign Het
Ttc23l CT CTTGGATT 15: 10,537,562 probably benign Het
Ttc23l G A 15: 10,537,566 S206L probably benign Het
Tyw5 A G 1: 57,396,748 I82T possibly damaging Het
Uba6 A G 5: 86,132,616 probably null Het
Ugcg C T 4: 59,207,798 P46S probably benign Het
Unc13c T C 9: 73,931,547 Y674C probably damaging Het
Vmn2r105 T A 17: 20,227,835 R242S probably benign Het
Vmn2r12 A G 5: 109,086,532 Y605H probably benign Het
Wdr77 A T 3: 105,960,021 K62* probably null Het
Zfhx4 C A 3: 5,390,405 A1153E probably benign Het
Zfp266 C A 9: 20,499,262 V540L possibly damaging Het
Zfp638 C A 6: 83,966,439 probably benign Het
Zfp644 A G 5: 106,637,244 M479T possibly damaging Het
Zfp951 G A 5: 104,815,277 T141I probably benign 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
PIT4434001:Top2b UTSW 14 16423780 critical splice donor site probably null
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
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
R4667: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
R7162:Top2b UTSW 14 16416653 missense probably benign 0.00
R7247:Top2b UTSW 14 16416962 missense probably benign 0.08
R7250:Top2b UTSW 14 16420411 missense probably benign
R7359:Top2b UTSW 14 16407376 missense probably null 1.00
R7365:Top2b UTSW 14 16416649 missense probably benign 0.04
R7493:Top2b UTSW 14 16416605 missense probably benign 0.00
R7528:Top2b UTSW 14 16395427 nonsense probably null
R7562:Top2b UTSW 14 16412946 missense probably benign 0.04
R7594:Top2b UTSW 14 16428587 missense probably benign
R7670:Top2b UTSW 14 16416620 missense possibly damaging 0.61
R7894:Top2b UTSW 14 16413081 missense possibly damaging 0.68
R7977:Top2b UTSW 14 16413081 missense possibly damaging 0.68
R8031:Top2b UTSW 14 16412986 missense probably damaging 0.98
X0028:Top2b UTSW 14 16384499 nonsense probably null
Z1176:Top2b UTSW 14 16395434 missense probably damaging 1.00
Z1177:Top2b UTSW 14 16416953 missense probably benign
Predicted Primers PCR Primer
(F):5'- CACCATGGAGAAGTAAGCACTG -3'
(R):5'- ATTTGAAGTACTCTCCCTGAGCAG -3'

Sequencing Primer
(F):5'- GCACTGAAGATGGGATCAACTG -3'
(R):5'- TCTCCCTGAGCAGAAAAACTAAATG -3'
Posted On2014-11-12