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UniProtKB/Swiss-Prot Q6PIJ6: Variant p.Cys206Arg

F-box only protein 38
Gene: FBXO38
Variant information

Variant position:  206
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 Cysteine (C) to Arginine (R) at position 206 (C206R, p.Cys206Arg).
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 medium size and polar (C) to large size and basic (R)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -3
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:  Neuronopathy, distal hereditary motor, 2D (HMN2D) [MIM:615575]: A disorder characterized by onset of slowly progressive distal lower limb weakness and atrophy between the second and fourth decades of life. Weakness usually begins in the calf muscles and later involves more proximal muscles. The severity is variable, and some patients have difficulty walking or running. Most also have upper limb involvement, particularly of the triceps and intrinsic hand muscles. Some patients may lose independent ambulation later in the disease course. Sensory impairment is typically not present, and cognition and bulbar function are normal. {ECO:0000269|PubMed:24207122}. 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 HMN2D; unable to promote activation of KLF7 target genes including CDKN1A and L1CAM in both cultured cells and patient-derived cells.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  206
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1188
The length of the canonical sequence.

Location on the sequence:   PIGAKIQTLHLVGVNVPEIP  C IPMLRHLYMKWVRLTKPQPF
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.

Human                         PIGAKIQTLHLVGVNVPEIPCIPMLRHLYMKWVRLTKPQPF

Mouse                         PIGAKIQTLHLVGVNVPEIPCIPMLRHLYMKWVRLTKPQPF

Caenorhabditis elegans        ---------------------------------------KY

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.

TypePositionsDescription
Chain 1 – 1188 F-box only protein 38


Literature citations

A dominant mutation in FBXO38 causes distal spinal muscular atrophy with calf predominance.
Sumner C.J.; d'Ydewalle C.; Wooley J.; Fawcett K.A.; Hernandez D.; Gardiner A.R.; Kalmar B.; Baloh R.H.; Gonzalez M.; Zuchner S.; Stanescu H.C.; Kleta R.; Mankodi A.; Cornblath D.R.; Boylan K.B.; Reilly M.M.; Greensmith L.; Singleton A.B.; Harms M.B.; Rossor A.M.; Houlden H.;
Am. J. Hum. Genet. 93:976-983(2013)
Cited for: VARIANT HMN2D ARG-206; CHARACTERIZATION OF VARIANT HMN2D ARG-206;

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.