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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9NSU2: Variant p.Glu198Lys

Three-prime repair exonuclease 1
Gene: TREX1
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Variant information Variant position: help 198 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] 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 Glutamate (E) to Lysine (K) at position 198 (E198K, p.Glu198Lys). 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 acidic (E) to large size and basic (K) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 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

Variant description: help In AGS1; increases ubiquitination levels; no effect on exonuclease activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 198 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 314 The length of the canonical sequence.
Location on the sequence: help SLGSIYTRLYGQSPPDSHTA E GDVLALLSICQWRPQALLRW 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                         SLGSIYTRLYGQSPPDSHTAEGDVLALLSICQWRPQALLRW

Mouse                         SLGSIYTRLYWQAPTDSHTAEGDVLTLLSICQWKPQALLQW

Bovine                        SLGSVYTRLYGQAPPDSHTAEGDVLALLSVCQWRPRALLRW

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 1 – 314 Three-prime repair exonuclease 1
Active site 195 – 195 Proton donor/acceptor
Binding site 200 – 200
Binding site 200 – 200
Helix 197 – 208



Literature citations
The TREX1 C-terminal region controls cellular localization through ubiquitination.
Orebaugh C.D.; Fye J.M.; Harvey S.; Hollis T.; Wilkinson J.C.; Perrino F.W.;
J. Biol. Chem. 288:28881-28892(2013)
Cited for: INTERACTION WITH UBQLN1; UBIQUITINATION; CHARACTERIZATION OF VARIANTS AGS1 ALA-122; LYS-198; ASN-200 AND PRO-303; CHARACTERIZATION OF VARIANTS SLE LEU-290 AND CYS-305; MUTAGENESIS OF LYS-30; LYS-66; LYS-75; LYS-160; LYS-175; LYS-242; LYS-271 AND LYS-277; Expanding the phenotypic spectrum of lupus erythematosus in Aicardi-Goutieres syndrome.
Ramantani G.; Kohlhase J.; Hertzberg C.; Innes A.M.; Engel K.; Hunger S.; Borozdin W.; Mah J.K.; Ungerath K.; Walkenhorst H.; Richardt H.H.; Buckard J.; Bevot A.; Siegel C.; von Stuelpnagel C.; Ikonomidou C.; Thomas K.; Proud V.; Niemann F.; Wieczorek D.; Haeusler M.; Niggemann P.; Baltaci V.; Conrad K.; Lebon P.; Lee-Kirsch M.A.;
Arthritis Rheum. 62:1469-1477(2010)
Cited for: VARIANTS AGS1 HIS-114; LYS-198 AND HIS-200; VARIANT SLE HIS-200;
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.