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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q15399: Variant p.His305Leu

Toll-like receptor 1
Gene: TLR1
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Variant information Variant position: help 305 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LB/B 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: help From Histidine (H) to Leucine (L) at position 305 (H305L, p.His305Leu). 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: help Change from medium size and polar (H) to medium size and hydrophobic (L) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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

Polymorphism: help Genetic variations in TLR1 may influence susceptibility to or protection against contracting leprosy and define the leprosy susceptibility locus 5 [MIM:613223]. Ser-602 is a common allele in Caucasians. It is associated with impaired cell surface expression and receptor function resulting in protection against leprosy. Additional information on the polymorphism described.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 305 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 786 The length of the canonical sequence.
Location on the sequence: help GQLDFRDFDYSGTSLKALSI H QVVSDVFGFPQSYIYEIFSN 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences.
Human                         GQLDFRDFDYSGTSLKALSIHQVVSDVFGFPQSYIYEIFSN

Mouse                         GQLAFRMFNYSDTSLKALSIHQVVTDVFSFPQSYIYSIFAN

Drosophila                    RYIAIVHPLKRRTSRRKVRIILVLIWALSCVLSAPCLLYSS

Sequence annotation in neighborhood: help 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 25 – 786 Toll-like receptor 1
Topological domain 25 – 580 Extracellular
Repeat 279 – 308 LRR 10
Beta strand 301 – 309



Literature citations
Functional characterization of naturally occurring genetic variants in the human TLR1-2-6 gene family.
Ben-Ali M.; Corre B.; Manry J.; Barreiro L.B.; Quach H.; Boniotto M.; Pellegrini S.; Quintana-Murci L.;
Hum. Mutat. 32:643-652(2011)
Cited for: VARIANTS PRO-44; THR-75; THR-80; TYR-118; SER-248; LEU-305; LEU-315; ASN-352; VAL-460; ALA-542; CYS-554; GLY-587; ILE-602; ALA-651; ALA-674; PRO-720 AND LEU-733; CHARACTERIZATION OF VARIANTS LEU-315; CYS-554; ILE-602; ALA-651 AND PRO-720;
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.