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UniProtKB/Swiss-Prot P02766: Variant p.Asn144Ser

Gene: TTR
Variant information

Variant position:  144
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 Asparagine (N) to Serine (S) at position 144 (N144S, p.Asn144Ser).
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 (N) to small size and polar (S)
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

Involvement in disease:  Amyloidosis, transthyretin-related (AMYL-TTR) [MIM:105210]: A hereditary generalized amyloidosis due to transthyretin amyloid deposition. Protein fibrils can form in different tissues leading to amyloid polyneuropathies, amyloidotic cardiomyopathy, carpal tunnel syndrome, systemic senile amyloidosis. The disease includes leptomeningeal amyloidosis that is characterized by primary involvement of the central nervous system. Neuropathologic examination shows amyloid in the walls of leptomeningeal vessels, in pia arachnoid, and subpial deposits. Some patients also develop vitreous amyloid deposition that leads to visual impairment (oculoleptomeningeal amyloidosis). Clinical features include seizures, stroke-like episodes, dementia, psychomotor deterioration, variable amyloid deposition in the vitreous humor. {ECO:0000269|PubMed:10036587, ECO:0000269|PubMed:10071047, ECO:0000269|PubMed:10211412, ECO:0000269|PubMed:10436378, ECO:0000269|PubMed:10439117, ECO:0000269|PubMed:10611950, ECO:0000269|PubMed:10627135, ECO:0000269|PubMed:10694917, ECO:0000269|PubMed:10842705, ECO:0000269|PubMed:10842718, ECO:0000269|PubMed:10882995, ECO:0000269|PubMed:11243784, ECO:0000269|PubMed:11445644, ECO:0000269|PubMed:11866053, ECO:0000269|PubMed:12050338, ECO:0000269|PubMed:12403615, ECO:0000269|PubMed:12557757, ECO:0000269|PubMed:12771253, ECO:0000269|PubMed:1301926, ECO:0000269|PubMed:1351039, ECO:0000269|PubMed:1362222, ECO:0000269|PubMed:1436517, ECO:0000269|PubMed:1517749, ECO:0000269|PubMed:1520326, ECO:0000269|PubMed:1520336, ECO:0000269|PubMed:15214015, ECO:0000269|PubMed:15217993, ECO:0000269|PubMed:1544214, ECO:0000269|PubMed:15478468, ECO:0000269|PubMed:1570831, ECO:0000269|PubMed:15735344, ECO:0000269|PubMed:16185074, ECO:0000269|PubMed:1656975, ECO:0000269|PubMed:16627944, ECO:0000269|PubMed:1734866, ECO:0000269|PubMed:17453626, ECO:0000269|PubMed:17503405, ECO:0000269|PubMed:17577687, ECO:0000269|PubMed:17635579, ECO:0000269|PubMed:19167329, ECO:0000269|PubMed:1932142, ECO:0000269|PubMed:2046936, ECO:0000269|PubMed:2161654, ECO:0000269|PubMed:23317988, ECO:0000269|PubMed:2363717, ECO:0000269|PubMed:2891727, ECO:0000269|PubMed:3022108, ECO:0000269|PubMed:3135807, ECO:0000269|PubMed:3722385, ECO:0000269|PubMed:3818577, ECO:0000269|PubMed:6487335, ECO:0000269|PubMed:6583672, ECO:0000269|PubMed:6651852, ECO:0000269|PubMed:7655883, ECO:0000269|PubMed:7850982, ECO:0000269|PubMed:7910950, ECO:0000269|PubMed:7914929, ECO:0000269|PubMed:7923855, ECO:0000269|PubMed:8019560, ECO:0000269|PubMed:8038017, ECO:0000269|PubMed:8081397, ECO:0000269|PubMed:8095302, ECO:0000269|PubMed:8133316, ECO:0000269|PubMed:8257997, ECO:0000269|PubMed:8352764, ECO:0000269|PubMed:8382610, ECO:0000269|PubMed:8428915, ECO:0000269|PubMed:8579098, ECO:0000269|PubMed:8990019, ECO:0000269|PubMed:9066351, ECO:0000269|PubMed:9605286, ECO:0000269|PubMed:9733771, ECO:0000269|Ref.90}. 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 AMYL-TTR.
Any additional useful information about the variant.

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

Sequence information

Variant position:  144
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  147
The length of the canonical sequence.

Location on the sequence:   RYTIAALLSPYSYSTTAVVT  N PKE
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                         RYTIAALLSPYSYSTTAVVTNPKE---

Chimpanzee                    RYTIAALLSPYSYSTTAVVTIPKE

Mouse                         HYTIAALLSPYSYSTTAVVSNPQN

Rat                           HYTIAALLSPYSYSTTAVVSNPQN

Pig                           HYTIAALLSPYSYSTTALVSSPKE

Bovine                        HYTIAALLSPYSYSTTALVSSPKA

Rabbit                        SYTIAALLSPFSYSTTAVVSNPQE

Sheep                         HYTIAALLSPYSYSTTALVSSPKE

Chicken                       HYTIAALLSPFSYSTTAVVSDPQE

Xenopus laevis                HYTIAVLLTPYSFSSTAIVSEPHD

Xenopus tropicalis            HYTIAVLLTPYSISSTAVVSEPHD

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.

Chain 21 – 147 Transthyretin
Mutagenesis 130 – 130 L -> M. Loss of tetramerization; when associated with M-107.

Literature citations

A novel type of familial transthyretin amyloidosis, ATTR Asn124Ser, with co-localization of kappa light chains.
Bergstroem J.; Patrosso M.C.; Colussi G.; Salvadore M.; Penco S.; Lando G.; Marocchi A.; Ueda A.; Nakamura M.; Ando Y.;
Amyloid 14:141-145(2007)
Cited for: VARIANT AMYL-TTR SER-144;

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.