Incidental Mutation 'B5639:Dnmt1'
ID 550
Institutional Source Beutler Lab
Gene Symbol Dnmt1
Ensembl Gene ENSMUSG00000004099
Gene Name DNA methyltransferase (cytosine-5) 1
Synonyms MTase, Dnmt1o, Cxxc9, MommeD2
Accession Numbers

Genbank: NM_010066

Is this an essential gene? Essential (E-score: 1.000) question?
Stock # B5639 of strain 3d
Quality Score
Status Validated
Chromosome 9
Chromosomal Location 20907209-20959888 bp(-) (GRCm38)
Type of Mutation splice site
DNA Base Change (assembly) G to A at 20907968 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change
Ref Sequence ENSEMBL: ENSMUSP00000150433 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000004202] [ENSMUST00000177754] [ENSMUST00000178110] [ENSMUST00000216540]
AlphaFold P13864
Predicted Effect probably benign
Transcript: ENSMUST00000004202
SMART Domains Protein: ENSMUSP00000004202
Gene: ENSMUSG00000004099

DomainStartEndE-ValueType
DMAP_binding 16 106 1.7e-13 SMART
low complexity region 121 143 N/A INTRINSIC
low complexity region 156 166 N/A INTRINSIC
low complexity region 180 194 N/A INTRINSIC
low complexity region 273 290 N/A INTRINSIC
low complexity region 306 328 N/A INTRINSIC
Pfam:DNMT1-RFD 405 540 4.8e-46 PFAM
low complexity region 610 625 N/A INTRINSIC
Pfam:zf-CXXC 648 694 2.7e-17 PFAM
low complexity region 701 711 N/A INTRINSIC
low complexity region 719 731 N/A INTRINSIC
BAH 758 884 4.62e-31 SMART
BAH 935 1103 1.79e-37 SMART
low complexity region 1110 1124 N/A INTRINSIC
Pfam:DNA_methylase 1142 1596 1.3e-49 PFAM
low complexity region 1600 1619 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000177754
SMART Domains Protein: ENSMUSP00000136982
Gene: ENSMUSG00000004099

DomainStartEndE-ValueType
low complexity region 3 25 N/A INTRINSIC
low complexity region 37 47 N/A INTRINSIC
low complexity region 61 75 N/A INTRINSIC
low complexity region 154 171 N/A INTRINSIC
low complexity region 187 209 N/A INTRINSIC
Pfam:DNMT1-RFD 286 421 3.4e-40 PFAM
low complexity region 491 506 N/A INTRINSIC
Pfam:zf-CXXC 529 575 2.3e-17 PFAM
low complexity region 582 592 N/A INTRINSIC
low complexity region 600 612 N/A INTRINSIC
BAH 639 765 4.62e-31 SMART
BAH 816 984 1.79e-37 SMART
low complexity region 991 1005 N/A INTRINSIC
Pfam:DNA_methylase 1023 1477 1.3e-49 PFAM
low complexity region 1481 1500 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000178110
SMART Domains Protein: ENSMUSP00000136669
Gene: ENSMUSG00000004099

DomainStartEndE-ValueType
low complexity region 3 25 N/A INTRINSIC
low complexity region 38 48 N/A INTRINSIC
low complexity region 62 76 N/A INTRINSIC
low complexity region 155 172 N/A INTRINSIC
low complexity region 188 210 N/A INTRINSIC
Pfam:DNMT1-RFD 287 422 2.6e-40 PFAM
low complexity region 492 507 N/A INTRINSIC
Pfam:zf-CXXC 530 576 4.7e-17 PFAM
low complexity region 583 593 N/A INTRINSIC
low complexity region 601 613 N/A INTRINSIC
BAH 640 766 4.62e-31 SMART
BAH 817 985 1.79e-37 SMART
low complexity region 992 1006 N/A INTRINSIC
Pfam:DNA_methylase 1024 1478 8e-50 PFAM
low complexity region 1482 1501 N/A INTRINSIC
Predicted Effect noncoding transcript
Transcript: ENSMUST00000214964
Predicted Effect probably benign
Transcript: ENSMUST00000216540
Coding Region Coverage
  • 1x: 89.7%
  • 3x: 78.3%
Het Detection Efficiency 55.9%
Validation Efficiency 83% (206/248)
MGI Phenotype FUNCTION: This gene encodes a methyltransferase that preferentially methylates cytosines of CpG residues in hemimethylated DNA to generate fully methylated CpG base pairs during DNA replication. This enzyme plays roles in diverse cellular processes including cell cycle regulation, DNA repair, and telomere maintenance. The encoded protein is composed of an N-terminal domain with a nuclear localization sequence and replication fork-targeting domain, a DNA-binding CXXC domain, two bromo-adjacent homology domains, and a C-terminal catalytic domain. Mouse embryonic stem cells mutant for this gene are viable, but when introduced into the germ line, cause a recessive lethal phenotype with mutant embryos displaying stunted growth and developmental defects. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2015]
PHENOTYPE: Mutations causing partial or severe loss of function were homozygous lethal by embryonic day 9.5, with lack of appropriate genomic imprinting observed at several loci. [provided by MGI curators]
Allele List at MGI

All alleles(109) : Targeted, knock-out(5) Targeted, other(11) Gene trapped(92) Chemically induced(1)

Other mutations in this stock
Total: 15 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Eno1 A G 4: 150,245,112 probably benign Het
Ercc8 G A 13: 108,160,723 G56R probably damaging Homo
Gm8773 C T 5: 5,574,060 probably benign Homo
Idh1 A G 1: 65,165,098 probably null Homo
Incenp G A 19: 9,893,818 T149I unknown Het
Olfr1155 G A 2: 87,943,598 S10F probably benign Het
Olfr181 A T 16: 58,926,526 I15K probably benign Homo
Pdk2 T C 11: 95,032,498 D100G possibly damaging Homo
Prss56 T C 1: 87,187,170 L465P probably benign Homo
Slc10a3 G A X: 74,369,539 P416L probably damaging Homo
Syne2 C A 12: 75,929,790 T1243K probably benign Het
Vwf T C 6: 125,642,984 Y1542H probably damaging Homo
Zc3h13 G A 14: 75,316,039 R302Q probably damaging Het
Zfhx4 G T 3: 5,403,175 G2798W probably damaging Homo
Zfp667 A G 7: 6,290,545 T15A probably damaging Het
Other mutations in Dnmt1
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00334:Dnmt1 APN 9 20910270 missense possibly damaging 0.94
IGL01093:Dnmt1 APN 9 20909785 missense possibly damaging 0.88
IGL01160:Dnmt1 APN 9 20917319 missense possibly damaging 0.90
IGL01704:Dnmt1 APN 9 20910180 missense probably damaging 1.00
IGL02105:Dnmt1 APN 9 20907882 missense unknown
IGL02124:Dnmt1 APN 9 20908549 missense probably damaging 1.00
IGL02188:Dnmt1 APN 9 20941738 nonsense probably null
IGL02409:Dnmt1 APN 9 20926497 missense probably benign 0.00
IGL02579:Dnmt1 APN 9 20918120 missense possibly damaging 0.79
IGL02625:Dnmt1 APN 9 20927146 missense probably benign 0.01
IGL02794:Dnmt1 APN 9 20936551 missense probably benign
IGL02795:Dnmt1 APN 9 20927111 missense probably benign 0.12
IGL02938:Dnmt1 APN 9 20941373 missense probably benign 0.23
IGL03245:Dnmt1 APN 9 20915760 missense probably damaging 0.99
IGL03303:Dnmt1 APN 9 20926710 missense probably benign
Blankslate UTSW 9 20912225 missense possibly damaging 0.86
BB003:Dnmt1 UTSW 9 20907559 missense unknown
BB013:Dnmt1 UTSW 9 20907559 missense unknown
PIT4576001:Dnmt1 UTSW 9 20911775 missense probably benign 0.28
R0071:Dnmt1 UTSW 9 20908620 missense probably damaging 0.99
R0180:Dnmt1 UTSW 9 20908620 missense probably damaging 0.99
R0368:Dnmt1 UTSW 9 20941757 missense probably damaging 0.99
R0387:Dnmt1 UTSW 9 20918213 missense probably damaging 1.00
R0529:Dnmt1 UTSW 9 20911550 missense probably damaging 1.00
R0532:Dnmt1 UTSW 9 20918556 splice site probably benign
R0612:Dnmt1 UTSW 9 20918193 missense probably damaging 0.98
R1109:Dnmt1 UTSW 9 20922388 missense probably damaging 1.00
R1298:Dnmt1 UTSW 9 20941456 missense probably benign
R1345:Dnmt1 UTSW 9 20908518 missense probably damaging 1.00
R1472:Dnmt1 UTSW 9 20932176 missense probably benign 0.28
R1654:Dnmt1 UTSW 9 20936574 missense possibly damaging 0.75
R1817:Dnmt1 UTSW 9 20927126 missense probably benign
R1836:Dnmt1 UTSW 9 20918246 missense probably damaging 1.00
R1957:Dnmt1 UTSW 9 20927146 missense probably benign 0.01
R1958:Dnmt1 UTSW 9 20927146 missense probably benign 0.01
R2097:Dnmt1 UTSW 9 20909788 missense probably benign 0.00
R2145:Dnmt1 UTSW 9 20937155 splice site probably benign
R2326:Dnmt1 UTSW 9 20924146 splice site probably benign
R4199:Dnmt1 UTSW 9 20938118 missense probably benign 0.00
R4456:Dnmt1 UTSW 9 20909842 missense probably damaging 1.00
R4518:Dnmt1 UTSW 9 20911978 missense probably benign 0.00
R4586:Dnmt1 UTSW 9 20926693 missense probably benign 0.05
R4836:Dnmt1 UTSW 9 20908558 missense probably damaging 1.00
R5014:Dnmt1 UTSW 9 20912254 missense probably benign 0.07
R5338:Dnmt1 UTSW 9 20952719 missense probably benign 0.44
R5385:Dnmt1 UTSW 9 20918480 missense probably damaging 1.00
R5579:Dnmt1 UTSW 9 20920205 missense probably damaging 1.00
R5645:Dnmt1 UTSW 9 20922147 missense probably damaging 1.00
R5719:Dnmt1 UTSW 9 20912595 missense possibly damaging 0.86
R5881:Dnmt1 UTSW 9 20952717 missense probably damaging 0.97
R6039:Dnmt1 UTSW 9 20926420 intron probably benign
R6039:Dnmt1 UTSW 9 20926420 intron probably benign
R6143:Dnmt1 UTSW 9 20927134 missense probably benign 0.30
R6342:Dnmt1 UTSW 9 20909793 nonsense probably null
R6374:Dnmt1 UTSW 9 20924045 missense possibly damaging 0.73
R6953:Dnmt1 UTSW 9 20918526 missense probably benign
R6990:Dnmt1 UTSW 9 20915814 nonsense probably null
R7089:Dnmt1 UTSW 9 20908489 missense probably damaging 0.99
R7463:Dnmt1 UTSW 9 20912225 missense possibly damaging 0.86
R7522:Dnmt1 UTSW 9 20920202 missense probably damaging 0.99
R7695:Dnmt1 UTSW 9 20913985 missense probably null 1.00
R7785:Dnmt1 UTSW 9 20922049 missense probably damaging 0.98
R7926:Dnmt1 UTSW 9 20907559 missense unknown
R8037:Dnmt1 UTSW 9 20941564 missense probably damaging 0.99
R8038:Dnmt1 UTSW 9 20941564 missense probably damaging 0.99
R8424:Dnmt1 UTSW 9 20918540 missense probably benign 0.07
R8692:Dnmt1 UTSW 9 20941781 missense probably damaging 1.00
R9016:Dnmt1 UTSW 9 20936559 missense possibly damaging 0.67
R9101:Dnmt1 UTSW 9 20941543 missense probably damaging 1.00
R9200:Dnmt1 UTSW 9 20908600 missense probably benign 0.00
R9248:Dnmt1 UTSW 9 20922112 missense possibly damaging 0.94
R9317:Dnmt1 UTSW 9 20918279 missense probably damaging 0.99
R9352:Dnmt1 UTSW 9 20929088 missense probably benign 0.00
R9438:Dnmt1 UTSW 9 20915894 missense probably benign
RF003:Dnmt1 UTSW 9 20910131 nonsense probably null
RF004:Dnmt1 UTSW 9 20910127 nonsense probably null
RF011:Dnmt1 UTSW 9 20910128 nonsense probably null
RF011:Dnmt1 UTSW 9 20910144 nonsense probably null
RF015:Dnmt1 UTSW 9 20910124 nonsense probably null
RF015:Dnmt1 UTSW 9 20910129 nonsense probably null
RF017:Dnmt1 UTSW 9 20910126 nonsense probably null
RF023:Dnmt1 UTSW 9 20910131 nonsense probably null
RF024:Dnmt1 UTSW 9 20910130 nonsense probably null
RF024:Dnmt1 UTSW 9 20910138 small insertion probably benign
RF025:Dnmt1 UTSW 9 20910120 nonsense probably null
RF025:Dnmt1 UTSW 9 20910135 nonsense probably null
RF029:Dnmt1 UTSW 9 20910123 nonsense probably null
RF034:Dnmt1 UTSW 9 20910120 nonsense probably null
RF037:Dnmt1 UTSW 9 20910119 critical splice donor site probably benign
RF037:Dnmt1 UTSW 9 20910133 nonsense probably null
RF037:Dnmt1 UTSW 9 20910141 nonsense probably null
RF042:Dnmt1 UTSW 9 20910119 nonsense probably null
RF045:Dnmt1 UTSW 9 20910129 nonsense probably null
RF045:Dnmt1 UTSW 9 20910137 small insertion probably benign
RF047:Dnmt1 UTSW 9 20910125 nonsense probably null
RF048:Dnmt1 UTSW 9 20910126 nonsense probably null
RF054:Dnmt1 UTSW 9 20910139 nonsense probably null
RF055:Dnmt1 UTSW 9 20910128 nonsense probably null
RF055:Dnmt1 UTSW 9 20910135 nonsense probably null
RF055:Dnmt1 UTSW 9 20910136 small insertion probably benign
RF059:Dnmt1 UTSW 9 20910138 small insertion probably benign
RF059:Dnmt1 UTSW 9 20910139 nonsense probably null
RF060:Dnmt1 UTSW 9 20910142 nonsense probably null
RF061:Dnmt1 UTSW 9 20910130 nonsense probably null
X0026:Dnmt1 UTSW 9 20913914 missense probably damaging 1.00
Z1176:Dnmt1 UTSW 9 20915863 missense probably damaging 0.99
Z1176:Dnmt1 UTSW 9 20926554 missense probably benign 0.00
Nature of Mutation

DNA sequencing using the SOLiD technique identified a C to T transition at position 44906 of the genomic DNA sequence of Dnmt1 (NC_000075, sense strand).  The mutation lies in the splice acceptor site of intron 37 of the 39 exon gene, and affects a cytosine base seven nucleotides from the next exon.  The mutation has been confirmed by DNA sequencing using the Sanger method (see trace files for B5639).

Protein Function and Prediction

DNA (cytosine-5)-methyltransferase 1 (Dnmt1) methylates CpG residues, preferentially those that exist in hemimethylated DNA (Uniprot P13864).  As such, Dnmt1 is essential for the transmission of epigenetic information from parent to offspring, and acts to maintain methylation patterns established during development.  Dnmt1 associates with DNA replication sites during S phase, and maintains the methylation pattern in the newly synthesized strand.  It associates with chromatin during G2 and M phases, and coordinates DNA and histone methylation by direct binding to HDAC2.  It has been shown to associate with Dnmt3b and regulate the activation of Bag1 gene expression by modulating dimethylation of histone H3 at lysines 4 and 9.  Mutations causing partial or severe loss of function were homozygous lethal by embryonic day 9.5, with lack of appropriate genomic imprinting observed at several loci.

 

Alternative splicing of three 5’ exons of Dnmt1 yields three transcripts (each specifically expressed in distinct tissues) that subsequently result in two translation products, a 1620 amino acid protein, and a 1602 amino acid protein.  Dnmt1 contains Bromo Adjacent Homology (BAH) domains I and II, a zinc finger domain, a catalytic DNA methyltransferase domain, and a nuclear localization signal.  It functions as a homodimer. 

 

The mutation may cause skipping of exon 38, and a frameshift thereafter.  Because the frameshift would affect the catalytic domain, it is likely that protein function would be compromised.

Posted On 2010-11-23