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UniProtKB/Swiss-Prot O15178: Variant p.His171Arg

T-box transcription factor T
Gene: TBXT
Chromosomal location: 6q27
Variant information

Variant position:  171
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 Histidine (H) to Arginine (R) at position 171 (H171R, p.His171Arg).
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 (H) to large size and basic (R)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  0
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:  Sacral agenesis with vertebral anomalies (SAVA) [MIM:615709]: A disorder characterized by abnormalities of the spine, including sacral agenesis, abnormal ossification of all vertebral bodies, and a persistent notochordal canal during development. {ECO:0000269|PubMed:24253444}. 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 SAVA; reduced DNA binding activity; increased cell growth; altered expression of genes involved in ossification and notochord maintenance.
Any additional useful information about the variant.

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



Sequence information

Variant position:  171
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  435
The length of the canonical sequence.

Location on the sequence:   KLNGGGQIMLNSLHKYEPRI  H IVRVGGPQRMITSHCFPETQ
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.

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 – 435 T-box transcription factor T
DNA binding 51 – 219 T-box
Beta strand 165 – 174


Literature citations

Mutations in the T (brachyury) gene cause a novel syndrome consisting of sacral agenesis, abnormal ossification of the vertebral bodies and a persistent notochordal canal.
Postma A.V.; Alders M.; Sylva M.; Bilardo C.M.; Pajkrt E.; van Rijn R.R.; Schulte-Merker S.; Bulk S.; Stefanovic S.; Ilgun A.; Barnett P.; Mannens M.M.; Moorman A.F.; Oostra R.J.; van Maarle M.C.;
J. Med. Genet. 51:90-97(2014)
Cited for: INVOLVEMENT IN SAVA; VARIANT SAVA ARG-171; CHARACTERIZATION OF SAVA ARG-171; SUBCELLULAR LOCATION;

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.