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UniProtKB/Swiss-Prot P60953: Variant p.Tyr64Cys

Cell division control protein 42 homolog
Gene: CDC42
Variant information

Variant position:  64
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 Tyrosine (Y) to Cysteine (C) at position 64 (Y64C, p.Tyr64Cys).
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 large size and aromatic (Y) to medium size and polar (C)
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

Involvement in disease:  Takenouchi-Kosaki syndrome (TKS) [MIM:616737]: A syndrome characterized by macrothrombocytopenia, lymphedema, mental retardation, developmental delay, and distinctive facial features. {ECO:0000269|PubMed:26386261, ECO:0000269|PubMed:26708094}. 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 TKS.
Any additional useful information about the variant.

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



Sequence information

Variant position:  64
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  191
The length of the canonical sequence.

Location on the sequence:   VMIGGEPYTLGLFDTAGQED  Y DRLRPLSYPQTDVFLVCFSV
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                         VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

                              VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

Mouse                         VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

Rat                           VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

Pig                           VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

Bovine                        VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

Chicken                       VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

Caenorhabditis elegans        VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

Drosophila                    VMIGGEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

Baker's yeast                 VMIGDEPYTLGLFDTAGQEDYDRLRPLSYPSTDVFLVCFSV

Fission yeast                 VMIGDEPYTLGLFDTAGQEDYDRLRPLSYPQTDVFLVCFSV

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 – 188 Cell division control protein 42 homolog
Modified residue 64 – 64 Phosphotyrosine; by SRC
Mutagenesis 61 – 61 Q -> L. Constitutively active. Interacts with PARD6 proteins.
Helix 62 – 64


Literature citations

Macrothrombocytopenia and developmental delay with a de novo CDC42 mutation: Yet another locus for thrombocytopenia and developmental delay.
Takenouchi T.; Kosaki R.; Niizuma T.; Hata K.; Kosaki K.;
Am. J. Med. Genet. A 167A:2822-2825(2015)
Cited for: INVOLVEMENT IN TKS; VARIANT TKS CYS-64;

Further evidence of a mutation in CDC42 as a cause of a recognizable syndromic form of thrombocytopenia.
Takenouchi T.; Okamoto N.; Ida S.; Uehara T.; Kosaki K.;
Am. J. Med. Genet. A 170:852-855(2016)
Cited for: VARIANT TKS CYS-64;

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.