Incidental Mutation 'F6893:Mepe'
ID 200
Institutional Source Beutler Lab
Gene Symbol Mepe
Ensembl Gene ENSMUSG00000053863
Gene Name matrix extracellular phosphoglycoprotein with ASARM motif (bone)
Synonyms OF45
Accession Numbers
Essential gene? Probably non essential (E-score: 0.049) question?
Stock # F6893 (G3) of strain busy
Quality Score
Status Validated
Chromosome 5
Chromosomal Location 104473195-104486477 bp(+) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to G at 104485242 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Isoleucine to Methionine at position 127 (I127M)
Ref Sequence ENSEMBL: ENSMUSP00000065200 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000066207]
AlphaFold Q8K4L6
Predicted Effect possibly damaging
Transcript: ENSMUST00000066207
AA Change: I127M

PolyPhen 2 Score 0.872 (Sensitivity: 0.83; Specificity: 0.93)
SMART Domains Protein: ENSMUSP00000065200
Gene: ENSMUSG00000053863
AA Change: I127M

DomainStartEndE-ValueType
signal peptide 1 24 N/A INTRINSIC
Pfam:Osteoregulin 29 192 4.2e-76 PFAM
low complexity region 257 272 N/A INTRINSIC
low complexity region 426 438 N/A INTRINSIC
Meta Mutation Damage Score 0.1795 question?
Coding Region Coverage
  • 1x: 88.7%
  • 3x: 74.0%
Validation Efficiency 88% (165/188)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a secreted calcium-binding phosphoprotein that belongs to the small integrin-binding ligand, N-linked glycoprotein (SIBLING) family of proteins. Members of this family are components of the extracellular matrix of bone and dentin and regulate bone mineralization. Deficiency of a similar protein in mouse results in increased bone mass. Mice lacking this gene are resistant to aging-related trabecular bone loss. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2014]
PHENOTYPE: Mice homozygous for disruptions in this gene have increased amounts of trabecular bone in their skeleton and undergo less age related bone loss. Otherwise, they display a normal phenotype. [provided by MGI curators]
Allele List at MGI

All alleles(1) : Targeted, knock-out(1)

Other mutations in this stock
Total: 35 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Abca14 G A 7: 119,924,261 (GRCm39) V1638M probably damaging Het
Agrn C T 4: 156,258,636 (GRCm39) R972Q probably benign Het
Anxa3 T C 5: 96,972,853 (GRCm39) probably benign Het
Bpifa6 G T 2: 153,829,078 (GRCm39) D202Y probably damaging Het
Ccdc15 G A 9: 37,226,936 (GRCm39) T346I probably damaging Homo
Celsr3 G A 9: 108,712,266 (GRCm39) R1731H probably benign Het
Ces4a A G 8: 105,873,859 (GRCm39) R443G possibly damaging Het
Chd2 T C 7: 73,157,620 (GRCm39) Q175R possibly damaging Het
Dpyd T A 3: 118,597,783 (GRCm39) probably null Het
Dscam G T 16: 96,857,660 (GRCm39) H117N possibly damaging Het
F13a1 A G 13: 37,155,999 (GRCm39) Y205H probably damaging Het
Fat3 A C 9: 15,918,085 (GRCm39) L1446R probably damaging Homo
Golga4 T C 9: 118,382,525 (GRCm39) L515S probably damaging Het
Hoxb1 A T 11: 96,256,728 (GRCm39) T26S probably benign Het
Igsf10 T G 3: 59,238,481 (GRCm39) T567P probably damaging Het
Lamb2 T C 9: 108,359,755 (GRCm39) V365A probably benign Het
Mpi A T 9: 57,453,832 (GRCm39) M230K probably benign Homo
Myh4 A G 11: 67,146,283 (GRCm39) D1447G probably null Homo
Or1f19 A G 16: 3,411,027 (GRCm39) I256V possibly damaging Het
Or1j4 A G 2: 36,740,819 (GRCm39) T254A probably benign Het
Panx2 T C 15: 88,952,213 (GRCm39) Y227H probably damaging Homo
Pdzd7 A G 19: 45,025,173 (GRCm39) W441R probably damaging Het
Poldip2 A G 11: 78,410,020 (GRCm39) I267M probably damaging Homo
Pros1 T A 16: 62,745,002 (GRCm39) V539E probably damaging Het
Sacs T C 14: 61,450,425 (GRCm39) M4157T probably benign Het
Slc45a3 A G 1: 131,909,075 (GRCm39) E424G probably benign Homo
Slc9a1 A G 4: 133,149,457 (GRCm39) E761G probably benign Homo
Stab2 G A 10: 86,691,035 (GRCm39) P2178L probably damaging Het
Syt4 C T 18: 31,577,274 (GRCm39) V27I possibly damaging Homo
Thumpd1 T A 7: 119,319,799 (GRCm39) K56* probably null Het
Tpr A G 1: 150,269,313 (GRCm39) K19E possibly damaging Homo
Ttll10 A G 4: 156,132,775 (GRCm39) I74T probably benign Het
Txnrd1 C T 10: 82,702,823 (GRCm39) Q95* probably null Homo
Zc3h7b A G 15: 81,662,872 (GRCm39) E421G possibly damaging Homo
Zc3hc1 G T 6: 30,387,525 (GRCm39) D51E probably benign Homo
Other mutations in Mepe
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00335:Mepe APN 5 104,485,843 (GRCm39) missense probably damaging 1.00
IGL01896:Mepe APN 5 104,486,135 (GRCm39) missense possibly damaging 0.85
IGL01997:Mepe APN 5 104,485,466 (GRCm39) missense probably damaging 1.00
IGL02311:Mepe APN 5 104,485,571 (GRCm39) missense probably damaging 0.98
IGL02586:Mepe APN 5 104,485,316 (GRCm39) missense probably benign 0.39
R1187:Mepe UTSW 5 104,486,114 (GRCm39) missense probably damaging 0.98
R1218:Mepe UTSW 5 104,474,939 (GRCm39) missense probably benign
R1633:Mepe UTSW 5 104,485,540 (GRCm39) missense probably benign 0.25
R2024:Mepe UTSW 5 104,474,957 (GRCm39) missense possibly damaging 0.72
R2026:Mepe UTSW 5 104,474,957 (GRCm39) missense possibly damaging 0.72
R2027:Mepe UTSW 5 104,474,957 (GRCm39) missense possibly damaging 0.72
R2393:Mepe UTSW 5 104,485,327 (GRCm39) missense possibly damaging 0.95
R2920:Mepe UTSW 5 104,486,113 (GRCm39) missense probably damaging 0.99
R3040:Mepe UTSW 5 104,485,988 (GRCm39) missense probably damaging 0.99
R3716:Mepe UTSW 5 104,485,294 (GRCm39) missense probably benign 0.25
R3973:Mepe UTSW 5 104,484,944 (GRCm39) missense probably benign
R3976:Mepe UTSW 5 104,484,944 (GRCm39) missense probably benign
R4894:Mepe UTSW 5 104,473,268 (GRCm39) missense probably damaging 0.98
R5556:Mepe UTSW 5 104,486,078 (GRCm39) missense probably damaging 1.00
R6256:Mepe UTSW 5 104,484,940 (GRCm39) missense probably benign 0.01
R6788:Mepe UTSW 5 104,486,074 (GRCm39) nonsense probably null
R7361:Mepe UTSW 5 104,485,009 (GRCm39) missense probably benign 0.41
R8431:Mepe UTSW 5 104,486,047 (GRCm39) missense possibly damaging 0.91
R8679:Mepe UTSW 5 104,485,754 (GRCm39) missense possibly damaging 0.91
R8745:Mepe UTSW 5 104,485,525 (GRCm39) missense possibly damaging 0.93
R8817:Mepe UTSW 5 104,485,151 (GRCm39) missense probably benign 0.12
Nature of Mutation
DNA sequencing using the SOLiD technique identified an A to G transition at position 447 of the Mepe transcript in exon 3 of 3 total exons.  The mutated nucleotide causes an isoleucine to methionine substitution at amino acid 127 of the encoded protein. The mutation has been confirmed by DNA sequencing using the Sanger method (Figure 1).
Protein Function and Prediction
The Mepe gene encodes a 441 amino acid secreted matrix protein that negatively regulates bone mineralization (Uniprot Q924I1). Mice homozygous for disruptions in this gene have increased amounts of trabecular bone in their skeleton and undergo less age related bone loss. Otherwise, they display a normal phenotype.
 
The I127M change is predicted to be benign by the PolyPhen program.
Posted On 2010-05-03