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UniProtKB/Swiss-Prot O00429: Variant p.Ala192Glu

Dynamin-1-like protein
Gene: DNM1L
Chromosomal location: 12p11.21
Variant information

Variant position:  192
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Alanine (A) to Glutamate (E) at position 192 (A192E, p.Ala192Glu).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from small size and hydrophobic (A) to medium size and acidic (E)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -1
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Involvement in disease:  Optic atrophy 5 (OPA5) [MIM:610708]: A form of optic atrophy, a disease characterized by progressive visual loss in association with a deficiency in the number of nerve fibers which arise in the retina and converge to form the optic disk, optic nerve, optic chiasm and optic tracts. OPA5 is an autosomal dominant non-syndromic form that manifests as slowly progressive visual loss with variable onset from the first to third decades. Additional ocular abnormalities may include central scotoma and dyschromatopsia. {ECO:0000269|PubMed:28969390}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In OPA5; changed localization to mitochondrion; impaired mitochondrial membrane fission.
Any additional useful information about the variant.

Sequence information

Variant position:  192
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  736
The length of the canonical sequence.

The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.






Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

Chain 1 – 736 Dynamin-1-like protein
Domain 22 – 302 Dynamin-type G
Alternative sequence 44 – 246 Missing. In isoform 7.
Mutagenesis 190 – 190 D -> A. Unable to homooligomerize. Unable to associate with MIEF2 into filaments forming the tubular structures that wrap around the scission site.
Helix 191 – 193

Literature citations

Mutations in DNM1L, as in OPA1, result indominant optic atrophy despite opposite effectson mitochondrial fusion and fission.
Gerber S.; Charif M.; Chevrollier A.; Chaumette T.; Angebault C.; Kane M.S.; Paris A.; Alban J.; Quiles M.; Delettre C.; Bonneau D.; Procaccio V.; Amati-Bonneau P.; Reynier P.; Leruez S.; Calmon R.; Boddaert N.; Funalot B.; Rio M.; Bouccara D.; Meunier I.; Sesaki H.; Kaplan J.; Hamel C.P.; Rozet J.M.; Lenaers G.;
Brain 140:2586-2596(2017)

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.