UniProtKB/SwissProt variant VAR

Variant information

Variant position:

636

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

Type of variant:

Polymorphism

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 Serine (S) to Arginine (R) at position 636 (S636R, p.Ser636Arg).

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 small size and polar (S) to large size and basic (R)

The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:

-1

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:

Genetic variations in TLR2 are associated with susceptibility to leprosy [MIM:246300]. Leprosy is a chronic disease associated with depressed cellular (but not humoral) immunity, the bacterium requires a lower temperature than 37 degrees Celsius and thrives particularly in peripheral Schwann cells and macrophages. The Trp-677 polymorphism in the intracellular domain of TLR2 has a role in susceptibility to lepromatous leprosy. Wild-type TLR2 mediates CD14-enhanced Mycobacterium leprae-dependent activation of NFKB1, but TLR2 containing the Trp-677 polymorphism did not. The impaired function of the Trp-677 polymorphism provides a molecular mechanism for the poor cellular immune response associated with lepromatous leprosy.

Additional information on the polymorphism described.

Other resources:

Links to websites of interest for the variant.

Variant rs137853177 [ dbSNP | Ensembl ]

Sequence information

Variant position:

636

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

Protein sequence length:

784

The length of the canonical sequence.

Location on the sequence:

WYMKMMWAWLQAKRKPRKAP S RNICYDAFVSYSERDAYWVE

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                         WYMKMMWAWLQAKRKPRKAPSRNICYDAFVSYSERDAYWVE

Gorilla                       WYMKMMWAWLQAKRKPRKAPSRNICYDAFVSYSERDAYWVE

                              WYMRMMWAWLQAKRKPRKAPSRDVCYDAFVSYSEHDSYWVE

Rhesus macaque                WYMKMMWAWLQAKRKPRKAPNRDICYDAFVSYSERDAYWVE

Chimpanzee                    WYMKMMWAWLQAKRKPRKAPSRNICYDAFVSYSERDAYWVE

Mouse                         WYLRMMWAWLQAKRKPKKAPCRDVCYDAFVSYSEQDSHWVE

Bovine                        WYMKMMWAWLQAKRKPRKAPRRDICYDAFVSYSERDSYWVE

Goat                          WYMKMMWAWLQAKRKPRKAPRRDLCYDAFVSYSEQDSYWVE

Sheep                         WYMKMMWAWLQAKRKPRKAPRRDLCYDAFVSYSERDSYWVE

Horse                         WYMKMMWAWLQAKRKPRTAPQRDICYDAFVSYSERDSYWVE

Drosophila                    MYNPIIYCWMNSRFR----------------YG--------

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.

Type	Positions	Description
Chain	21 – 784	Toll-like receptor 2
Topological domain	610 – 784	Cytoplasmic

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 ASP-89; ILE-411; HIS-571; HIS-631; ARG-636 AND GLN-753; CHARACTERIZATION OF VARIANTS ILE-411; HIS-631 AND GLN-753;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O60603: Variant p.Ser636Arg