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UniProtKB/Swiss-Prot P21580: Variant p.Cys243Tyr

Tumor necrosis factor alpha-induced protein 3
Gene: TNFAIP3
Chromosomal location: 6q23
Variant information

Variant position:  243
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 Cysteine (C) to Tyrosine (Y) at position 243 (C243Y, p.Cys243Tyr).
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 (C) to large size and aromatic (Y)
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:  Autoinflammatory syndrome, familial, Behcet-like (AISBL) [MIM:616744]: An autosomal dominant, autoinflammatory disorder with early onset, characterized by ulceration of mucosal surfaces, particularly in the oral and genital areas. Additional variable features include skin rash, uveitis, and polyarthritis. {ECO:0000269|PubMed:26642243, ECO:0000269|PubMed:27175295}. 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 AISBL; increases inflammatory cytokine secretion; increases NF-kappaB signaling.
Any additional useful information about the variant.



Sequence information

Variant position:  243
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  790
The length of the canonical sequence.

Location on the sequence:   NFAPLKVGGIYLPLHWPAQE  C YRYPIVLGYDSHHFVPLVTL
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                         NFAPLKVGGIYLPLHWPAQECYRYPIVLGYDSHHFVPLVTL

Mouse                         NFAPLKVGGIYLPLHWPAQECYRYPIVLGYDSQHFVPLVTL

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 2 – 790 Tumor necrosis factor alpha-induced protein 3
Chain 2 – 439 A20p50
Domain 92 – 263 OTU
Region 58 – 300 TRAF-binding
Active site 256 – 256 Proton acceptor
Mutagenesis 224 – 224 F -> A. Strongly reduced 'Lys-48' deubiquitinase activity.
Mutagenesis 227 – 227 L -> A. Strongly reduced 'Lys-48' deubiquitinase activity.
Mutagenesis 256 – 256 H -> A. Loss of deubiquitinase activity.


Literature citations

Novel heterozygous C243Y A20/TNFAIP3 gene mutation is responsible for chronic inflammation in autosomal-dominant Behcet's disease.
Shigemura T.; Kaneko N.; Kobayashi N.; Kobayashi K.; Takeuchi Y.; Nakano N.; Masumoto J.; Agematsu K.;
RMD Open 2:E000223-E000223(2016)
Cited for: VARIANT AISBL TYR-243; CHARACTERIZATION OF VARIANT AISBL TYR-243;

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.