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UniProtKB/Swiss-Prot O14773: Variant p.Phe481Cys

Tripeptidyl-peptidase 1
Gene: TPP1
Chromosomal location: 11p15
Variant information

Variant position:  481
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 Phenylalanine (F) to Cysteine (C) at position 481 (F481C, p.Phe481Cys).
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 large size and aromatic (F) to medium size and polar (C)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -2
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:  Ceroid lipofuscinosis, neuronal, 2 (CLN2) [MIM:204500]: A form of neuronal ceroid lipofuscinosis. Neuronal ceroid lipofuscinoses are progressive neurodegenerative, lysosomal storage diseases characterized by intracellular accumulation of autofluorescent liposomal material, and clinically by seizures, dementia, visual loss, and/or cerebral atrophy. The lipopigment pattern seen most often in CLN2 consists of curvilinear profiles. {ECO:0000269|PubMed:10330339, ECO:0000269|PubMed:10665500, ECO:0000269|PubMed:11241479, ECO:0000269|PubMed:11339651, ECO:0000269|PubMed:11589012, ECO:0000269|PubMed:12376936, ECO:0000269|PubMed:12414822, ECO:0000269|PubMed:12698559, ECO:0000269|PubMed:14736728, ECO:0000269|PubMed:19201763, ECO:0000269|PubMed:20340139, ECO:0000269|PubMed:21990111, ECO:0000269|PubMed:22612257, ECO:0000269|PubMed:9295267}. 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 CLN2.
Any additional useful information about the variant.

Sequence information

Variant position:  481
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  563
The length of the canonical sequence.

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.



Chimpanzee                    VVSNRVPIPWVSGTS----------ASTPVFGGILSLINEH

Mouse                         VVSNMVPIPWVSGTS----------ASTPVFGGILSLINEH

Rat                           VVSNMVPIPWVSGTS----------ASTPVFGGILSLINEH

Bovine                        VVSNHVPIPWVSGTS----------ASTPVFGGLLSLINEH

Slime mold                    ILYKDKLMP-IGGTS----------ASAPIIAGLLSLINDQ

Baker's yeast                 -------------------------DSDIKFAENLHVEF--


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 196 – 563 Tripeptidyl-peptidase 1
Domain 199 – 563 Peptidase S53
Active site 475 – 475 Charge relay system
Disulfide bond 365 – 526
Mutagenesis 475 – 475 S -> A. Inactive. Impaired processing.
Helix 474 – 494

Literature citations

Identification of novel CLN2 mutations shows Canadian specific NCL2 alleles.
Ju W.; Zhong R.; Moore S.; Moroziewicz D.; Currie J.R.; Parfrey P.; Brown W.T.; Zhong N.;
J. Med. Genet. 39:822-825(2002)
Cited for: VARIANTS CLN2 MET-277; PRO-278; VAL-284 AND CYS-481;

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.