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UniProtKB/Swiss-Prot P25189: Variant p.Asp134Glu

Myelin protein P0
Gene: MPZ
Variant information

Variant position:  134
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LP/P [Disclaimer]
The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change:  From Aspartate (D) to Glutamate (E) at position 134 (D134E, p.Asp134Glu).
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:  Similar physico-chemical property. Both residues are medium size and acidic.
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  2
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

Variant description:  In CMT1B.
Any additional useful information about the variant.



Sequence information

Variant position:  134
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  248
The length of the canonical sequence.

Location on the sequence:   IHNLDYSDNGTFTCDVKNPP  D IVGKTSQVTLYVFEKVPTRY
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                         IHNLDYSDNGTFTCDVKNPPDIVGKTSQVTLYVFEKVPTRY

Mouse                         IHNLDYSDNGTFTCDVKNPPDIVGKTSQVTLYVFEKVPTRY

Rat                           IHNLDYSDNGTFTCDVKNPPDIVGKTSQVTLYVFEKVPTRY

Bovine                        IHNLDYGDNGTFTCDVKNPPDIVGKTSQVTLYVFEKVPTRY

Horse                         IHNLDYSDNGTFTCDVKNPPDIVGKTSQVTLYVFEKVPTRY

Chicken                       IHNLDYTDNGTFTCDVKNPPDIVGKSSQVTLYVLEKVPTRY

Xenopus laevis                VHNLELTDNGTFTCDVKNPPDVVGKSSYVHLQVQEKGPARA

Xenopus tropicalis            LHNLELIDNGTFTCDVKNPPDVVGKSSYVHLQVQEKGAARA

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 30 – 248 Myelin protein P0
Topological domain 30 – 153 Extracellular
Domain 30 – 143 Ig-like V-type
Glycosylation 122 – 122 N-linked (GlcNAc...) (complex) asparagine
Beta strand 134 – 148


Literature citations

Linkage and mutation analysis in an extended family with Charcot-Marie-Tooth disease type 1B.
Nelis E.; Timmerman V.; De Jonghe P.; Muylle L.; Martin J.-J.; Van Broeckhoven C.;
J. Med. Genet. 31:811-815(1994)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 24-248; VARIANT CMT1B GLU-134;

Screening for mutations in the peripheral myelin genes PMP22, MPZ and Cx32 (GJB1) in Russian Charcot-Marie-Tooth neuropathy patients.
Mersiyanova I.V.; Ismailov S.M.; Polyakov A.V.; Dadali E.L.; Fedotov V.P.; Nelis E.; Loefgren A.; Timmerman V.; Van Broeckhoven C.; Evgrafov O.V.;
Hum. Mutat. 15:340-347(2000)
Cited for: VARIANTS CMT1B HIS-98; GLY-134; GLU-134; THR-135; ASN-138 AND ASN-139;

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.