OMIA 001508-9615 : Myotubular myopathy 1 in Canis lupus familiaris

Possibly relevant human trait(s) and/or gene(s) (MIM number): 310400

Mendelian trait/disorder: yes

Mode of inheritance: X-linked recessive

Considered a defect: yes

Key variant known: yes

Year key variant first reported: 2010

Cross-species summary: Also known as X-linked myotubular myopathy (XLMTM)

Inheritance: Beggs et al. (2010) presented pedigree information that was inconsistent with autosomal recessive inheritance but consistent with X-linked recessive inheritance.

Molecular basis: Based on the close histopathological resemblance to human MTM1 (see link to MIM entry above), Beggs et al. (2010) sequenced all 15 exons of the comparative candidate MTM1 gene in two affected male Labrador Retrievers, one obligate female carrier Labrador Retriever, and several non-affected dogs from other breeds. A potentially causative missense mutation (c.465C>A; p.N155K) in exon 7 was confirmed by further sequencing ("seven affected males, representing each of the affected families, were found to be hemizygous for this change, whereas three obligate female carriers were all heterozygous") and genotyping (the mutation "was not seen in any of 237 unrelated and unaffected Labrador Retrievers from throughout North America, Europe, and Australia, nor was it detected in any of 59 additional control dogs from 25 other breeds").

Shelton et al. (2015) sequenced the same gene in a group of Australian Rottweilers segregating in a similar (X-linked) manner for very similar clinical signs, and discovered a different causal missense mutation (c.1151A>C; p.Q384P) in exon 11. Subsequent genotyping of this mutation in UK Rottweilers and other (unrelated) Australian Rottweliers showed no trace of the mutation, suggesting that this mutation is fairly new.

Breeds: Labrador Retriever, Rottweiler.

Associated gene:

Symbol Description Species Chr Location OMIA gene details page Other Links
MTM1 myotubularin 1 Canis lupus familiaris X NC_051843.1 (121040671..121137182) MTM1 Homologene, Ensembl, NCBI gene


By default, variants are sorted chronologically by year of publication, to provide a historical perspective. Readers can re-sort on any column by clicking on the column header. Click it again to sort in a descending order. To create a multiple-field sort, hold down Shift while clicking on the second, third etc relevant column headers.

WARNING! Inclusion of a variant in this table does not automatically mean that it should be used for DNA testing. Anyone contemplating the use of any of these variants for DNA testing should examine critically the relevant evidence (especially in breeds other than the breed in which the variant was first described). If it is decided to proceed, the location and orientation of the variant sequence should be checked very carefully.

Breed(s) Variant Phenotype Gene Allele Type of Variant Reference Sequence Chr. g. or m. c. or n. p. Verbal Description EVA ID Year Published PubMed ID(s) Acknowledgements
Rottweiler Myotubular myopathy 1 MTM1 missense c.1151A>C p.Q384P 2015 25664165
Labrador Retriever Myotubular myopathy 1 MTM1 missense c.465C>A p.N155K 2010 20682747


Note: the references are listed in reverse chronological order (from the most recent year to the earliest year), and alphabetically by first author within a year.
2017 Mack, D.L., Poulard, K., Goddard, M.A., Latournerie, V., Snyder, J.M., Grange, R.W., Elverman, M.R., Denard, J., Veron, P., Buscara, L., Le Bec, C., Hogrel, J.Y., Brezovec, A.G., Meng, H., Yang, L., Liu, F., O'Callaghan, M., Gopal, N., Kelly, V.E., Smith, B.K., Strande, J.L., Mavilio, F., Beggs, A.H., Mingozzi, F., Lawlor, M.W., Buj-Bello, A., Childers, M.K. :
Systemic AAV8-Mediated Gene Therapy Drives Whole-Body Correction of Myotubular Myopathy in Dogs. Mol Ther :, 2017. Pubmed reference: 28237839. DOI: 10.1016/j.ymthe.2017.02.004.
2016 Lawlor, M.W., Beggs, A.H., Buj-Bello, A., Childers, M.K., Dowling, J.J., James, E.S., Meng, H., Moore, S.A., Prasad, S., Schoser, B., Sewry, C.A. :
Skeletal Muscle Pathology in X-Linked Myotubular Myopathy: Review With Cross-Species Comparisons. J Neuropathol Exp Neurol 75:102-10, 2016. Pubmed reference: 26823526. DOI: 10.1093/jnen/nlv020.
2015 Goddard, M.A., Mack, D.L., Czerniecki, S.M., Kelly, V.E., Snyder, J.M., Grange, R.W., Lawlor, M.W., Smith, B.K., Beggs, A.H., Childers, M.K. :
Muscle pathology, limb strength, walking gait, respiratory function and neurological impairment establish disease progression in the p.N155K canine model of X-linked myotubular myopathy. Ann Transl Med 3:262, 2015. Pubmed reference: 26605308. DOI: 10.3978/j.issn.2305-5839.2015.10.31.
Shelton, G.D., Rider, B.E., Child, G., Tzannes, S., Guo, L.T., Moghadaszadeh, B., Troiano, E.C., Haase, B., Wade, C.M., Beggs, A.H. :
X-linked myotubular myopathy in Rottweiler dogs is caused by a missense mutation in Exon 11 of the MTM1 gene. Skelet Muscle 5:1, 2015. Pubmed reference: 25664165. DOI: 10.1186/s13395-014-0025-3.
Snyder, J.M., Meisner, A., Mack, D., Goddard, M., Coulter, I.T., Grange, R., Childers, M.K. :
Validity of a Neurological Scoring System for Canine X-Linked Myotubular Myopathy. Hum Gene Ther Clin Dev 26:131-7, 2015. Pubmed reference: 26086764. DOI: 10.1089/humc.2015.049.
2012 Grange, R.W., Doering, J., Mitchell, E., Holder, M.N., Guan, X., Goddard, M., Tegeler, C., Beggs, A.H., Childers, M.K. :
Muscle function in A canine model of X-linked myotubular myopathy. Muscle Nerve 46:588-91, 2012. Pubmed reference: 22987702. DOI: 10.1002/mus.23463.
2010 Beggs, A.H., Böhm, J., Snead, E., Kozlowski, M., Maurer, M., Minor, K., Childers, M.K., Taylor, S.M., Hitte, C., Mickelson, J.R., Guo, L.T., Mizisin, A.P., Buj-Bello, A., Tiret, L., Laporte, J., Shelton, G.D. :
MTM1 mutation associated with X-linked myotubular myopathy in Labrador Retrievers. Proc Natl Acad Sci U S A 107:14697-702, 2010. Pubmed reference: 20682747. DOI: 10.1073/pnas.1003677107.
2008 Cosford, KL., Taylor, SM., Thompson, L., Shelton, GD. :
A possible new inherited myopathy in a young Labrador retriever. Can Vet J 49:393-7, 2008. Pubmed reference: 18481550.

Edit History

  • Created by Frank Nicholas on 26 Oct 2010
  • Changed by Frank Nicholas on 28 Sep 2011
  • Changed by Frank Nicholas on 12 Dec 2011
  • Changed by Frank Nicholas on 24 Feb 2015
  • Changed by Frank Nicholas on 15 Oct 2016