Home  |  Contact

UniProtKB/Swiss-Prot Q8TEA7: Variant p.Leu551Pro

TBC domain-containing protein kinase-like protein
Gene: TBCK
Variant information

Variant position:  551
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 Leucine (L) to Proline (P) at position 551 (L551P, p.Leu551Pro).
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 hydrophobic.
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:  Hypotonia, infantile, with psychomotor retardation and characteristic facies 3 (IHPRF3) [MIM:616900]: An autosomal recessive neurodevelopmental disorder characterized by profound developmental disability, intellectual disability and severe hypotonia. Many patients have seizures, and show brain atrophy, dysgenesis of the corpus callosum and white-matter changes on neuroimaging. Non-specific facial dysmorphism is noted in some individuals. {ECO:0000269|PubMed:25558065, ECO:0000269|PubMed:27040691, ECO:0000269|PubMed:27040692}. 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 IHPRF3.
Any additional useful information about the variant.



Sequence information

Variant position:  551
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  893
The length of the canonical sequence.

Location on the sequence:   VLKAWVVSHPDLVYWQGLDS  L CAPFLYLNFNNEALAYACMS
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                         VLKAWVVSHPDLV-YWQGLDSLCAPFLYLNFNNEALAYACMS

Mouse                         VLKAWVVSHPDLV-YWQGLDSLCAPFLYLNFNNEALAYACM

Chicken                       VLKAWVVSHPDLV-YWQGLDSLCAPFLYLNFNNEALAYACM

Slime mold                    ILKAWSLLNLEKGCYWQGLDNVASPFLVHHFFNEPIAFASL

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 – 893 TBC domain-containing protein kinase-like protein
Domain 466 – 651 Rab-GAP TBC


Literature citations

Mutations in TBCK, encoding TBC1-domain-containing kinase, lead to a recognizable syndrome of intellectual disability and hypotonia.
Bhoj E.J.; Li D.; Harr M.; Edvardson S.; Elpeleg O.; Chisholm E.; Juusola J.; Douglas G.; Guillen Sacoto M.J.; Siquier-Pernet K.; Saadi A.; Bole-Feysot C.; Nitschke P.; Narravula A.; Walke M.; Horner M.B.; Day-Salvatore D.L.; Jayakar P.; Vergano S.A.; Tarnopolsky M.A.; Hegde M.; Colleaux L.; Crino P.; Hakonarson H.;
Am. J. Hum. Genet. 98:782-788(2016)
Cited for: FUNCTION; INVOLVEMENT IN IHPRF3; VARIANT IHPRF3 PRO-551;

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.