Incidental Mutation 'R3508:Tk2'
Institutional Source Beutler Lab
Gene Symbol Tk2
Ensembl Gene ENSMUSG00000035824
Gene Namethymidine kinase 2, mitochondrial
MMRRC Submission 040664-MU
Accession Numbers
Is this an essential gene? Probably essential (E-score: 0.828) question?
Stock #R3508 (G1)
Quality Score225
Status Not validated
Chromosomal Location104226685-104248558 bp(-) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) C to T at 104231193 bp
Amino Acid Change Valine to Isoleucine at position 174 (V174I)
Ref Sequence ENSEMBL: ENSMUSP00000148642 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000050211] [ENSMUST00000211995] [ENSMUST00000212209] [ENSMUST00000212275]
Predicted Effect probably benign
Transcript: ENSMUST00000050211
AA Change: V174I

PolyPhen 2 Score 0.003 (Sensitivity: 0.98; Specificity: 0.44)
SMART Domains Protein: ENSMUSP00000053616
Gene: ENSMUSG00000035824
AA Change: V174I

low complexity region 2 35 N/A INTRINSIC
Pfam:dNK 58 267 1.2e-67 PFAM
Predicted Effect probably benign
Transcript: ENSMUST00000211995
Predicted Effect noncoding transcript
Transcript: ENSMUST00000212165
Predicted Effect probably benign
Transcript: ENSMUST00000212209
Predicted Effect probably benign
Transcript: ENSMUST00000212275
AA Change: V174I

PolyPhen 2 Score 0.003 (Sensitivity: 0.98; Specificity: 0.44)
Predicted Effect noncoding transcript
Transcript: ENSMUST00000212805
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.6%
  • 10x: 97.3%
  • 20x: 95.0%
Validation Efficiency
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a deoxyribonucleoside kinase that specifically phosphorylates thymidine, deoxycytidine, and deoxyuridine. The encoded enzyme localizes to the mitochondria and is required for mitochondrial DNA synthesis. Mutations in this gene are associated with a myopathic form of mitochondrial DNA depletion syndrome. Alternate splicing results in multiple transcript variants encoding distinct isoforms, some of which lack transit peptide, so are not localized to mitochondria. [provided by RefSeq, Dec 2012]
PHENOTYPE: Knock-out mice die at 2-4 wks of age showing stunted growth, hypothermia, progressive mtDNA loss, aberrant myocardial fibers and altered adipose tissue structure. Knock-in mutant mice show encephalomyelopathy, impaired gait, mtDNA loss, altered mt dNTP pools and respiratory chain enzyme activities. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 62 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
1700014D04Rik A T 13: 59,742,505 Y500* probably null Het
Abca8a A T 11: 110,063,165 F816L probably benign Het
Adgrl3 C A 5: 81,724,256 N932K probably damaging Het
Apol8 T C 15: 77,749,443 E311G probably damaging Het
Atad2b G A 12: 4,950,595 probably null Het
Carmil1 A G 13: 24,019,676 probably benign Het
Cdc20b T C 13: 113,081,042 S332P possibly damaging Het
Cep162 A G 9: 87,231,977 probably null Het
Cfap54 T A 10: 92,885,424 S2482C unknown Het
Cnpy1 T C 5: 28,207,367 E107G probably damaging Het
Crtac1 C T 19: 42,304,741 V310I probably benign Het
Csmd3 CCTTTGCGCTT CCTT 15: 47,741,236 probably null Het
Elmo1 T C 13: 20,605,232 I706T probably damaging Het
F12 T C 13: 55,421,059 T297A probably benign Het
Fanci A G 7: 79,433,472 I736V probably benign Het
Fbn1 T C 2: 125,306,327 N2667S probably benign Het
Flt4 T C 11: 49,634,114 S596P probably damaging Het
Fndc1 G A 17: 7,765,108 R1329* probably null Het
Gjd4 G T 18: 9,280,811 S89* probably null Het
H2-M10.1 T G 17: 36,325,614 R99S possibly damaging Het
Homer3 T A 8: 70,291,355 V243D probably benign Het
Hspa14 A G 2: 3,491,008 S437P probably damaging Het
Inpp1 A T 1: 52,799,391 I33N probably damaging Het
Ipo5 T A 14: 120,939,544 Y714N probably damaging Het
Kif27 T C 13: 58,313,212 E898G possibly damaging Het
Klhdc7b T A 15: 89,386,892 M1K probably null Het
Krt83 A G 15: 101,488,158 Y241H probably benign Het
Mfsd4b1 A G 10: 40,002,719 I394T probably benign Het
Micall1 A G 15: 79,122,765 D264G probably damaging Het
Mms22l T G 4: 24,586,224 D905E probably benign Het
Musk A G 4: 58,327,347 D217G probably damaging Het
Napb T C 2: 148,698,960 T236A probably benign Het
Nbn T A 4: 15,962,387 D38E probably damaging Het
Ncaph T C 2: 127,127,193 N87D probably benign Het
Olfr1251 A G 2: 89,667,472 V138A probably benign Het
Pcdhb13 T A 18: 37,443,151 V194E probably damaging Het
Pck1 T C 2: 173,158,384 V536A possibly damaging Het
Pld5 C T 1: 175,994,037 G188S probably damaging Het
Plekha8 T C 6: 54,613,194 V48A probably damaging Het
Pnkd A G 1: 74,350,634 T306A probably benign Het
Ppm1k T C 6: 57,514,990 E279G probably damaging Het
Ppm1l G T 3: 69,549,480 K243N possibly damaging Het
Ppp1r13b T C 12: 111,872,367 T26A probably damaging Het
Rtel1 T C 2: 181,322,409 V67A probably benign Het
Rxfp4 T C 3: 88,652,592 E184G probably damaging Het
Scp2d1 A G 2: 144,823,998 I86V probably benign Het
Sec16a G T 2: 26,425,850 P1718Q probably damaging Het
Sgcg T A 14: 61,221,746 T245S probably benign Het
Slc18a2 A G 19: 59,273,557 T215A probably benign Het
Sorcs1 G A 19: 50,225,175 R705C probably damaging Het
Sox17 G T 1: 4,492,155 P146Q probably damaging Het
Sybu T A 15: 44,673,082 E616V probably damaging Het
Tmc5 G A 7: 118,645,395 V499I probably benign Het
Tmem110 C T 14: 30,872,580 L217F probably damaging Het
Tonsl T C 15: 76,639,756 T15A probably benign Het
Ttll12 A G 15: 83,580,630 I448T probably damaging Het
Ttn A G 2: 76,753,757 S22336P probably damaging Het
Ubap1 C A 4: 41,379,163 H126N probably damaging Het
Upf1 C T 8: 70,338,460 R544H probably damaging Het
Vmn2r84 T C 10: 130,390,908 N354D probably damaging Het
Vpreb3 A C 10: 75,949,203 H45P probably benign Het
Zc3h13 T A 14: 75,308,940 Y160* probably null Het
Other mutations in Tk2
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL02447:Tk2 APN 8 104241138 missense probably damaging 1.00
IGL02525:Tk2 APN 8 104243400 missense probably benign 0.02
IGL03211:Tk2 APN 8 104243441 missense probably damaging 1.00
R0333:Tk2 UTSW 8 104248514 unclassified probably benign
R0691:Tk2 UTSW 8 104231192 missense probably benign 0.16
R1851:Tk2 UTSW 8 104248445 nonsense probably null
R3605:Tk2 UTSW 8 104231171 missense possibly damaging 0.95
R4161:Tk2 UTSW 8 104238833 missense probably benign 0.00
R5328:Tk2 UTSW 8 104229299 splice site probably null
R5546:Tk2 UTSW 8 104247683 missense possibly damaging 0.51
R6909:Tk2 UTSW 8 104236810 nonsense probably null
R8098:Tk2 UTSW 8 104231172 missense probably benign 0.05
R8354:Tk2 UTSW 8 104241114 critical splice donor site probably null
R8357:Tk2 UTSW 8 104236818 missense probably damaging 1.00
R8454:Tk2 UTSW 8 104241114 critical splice donor site probably null
R8457:Tk2 UTSW 8 104236818 missense probably damaging 1.00
Predicted Primers PCR Primer

Sequencing Primer
Posted On2015-02-18