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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9NRR2: Variant p.Leu204Ile

Tryptase gamma
Gene: TPSG1
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Variant information Variant position: help 204 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LB/B 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 Leucine (L) to Isoleucine (I) at position 204 (L204I, p.Leu204Ile). 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 Similar physico-chemical property. Both residues are medium size and hydrophobic. The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 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

Polymorphism: help There are two alleles; gamma-I and gamma-II which differ by 5 residues. Additional information on the polymorphism described.
Variant description: help In allele gamma-II. Any additional useful information about the variant.


Sequence information Variant position: help 204 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 321 The length of the canonical sequence.
Location on the sequence: help VSVVDTETCRRDYPGPGGSI L QPDMLCARGPGDACQDDSGG 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                         VSVVDTETCRRDYPGPGGSILQPDMLCARGPGDACQDDSGG

Mouse                         VSVVDVKTCSQAYNSPNGSLIQPDMLCARGPGDACQDDSGG

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 20 – 321 Tryptase gamma
Chain 38 – 321 Tryptase gamma heavy chain
Domain 38 – 270 Peptidase S1
Active site 222 – 222 Charge relay system
Disulfide bond 159 – 228
Disulfide bond 192 – 210



Literature citations
Characterization of human gamma-tryptases, novel members of the chromosome 16p mast cell tryptase and prostasin gene families.
Caughey G.H.; Raymond W.W.; Blount J.L.; Hau L.W.; Pallaoro M.; Wolters P.J.; Verghese G.M.;
J. Immunol. 164:6566-6575(2000)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANTS MET-60; MET-126; THR-132; SER-160; ILE-204; ILE-239 AND LEU-288;
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.