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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q8TD43: Variant p.Ile1040Thr

Transient receptor potential cation channel subfamily M member 4
Gene: TRPM4
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Variant information Variant position: help 1040 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 Isoleucine (I) to Threonine (T) at position 1040 (I1040T, p.Ile1040Thr). 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 hydrophobic (I) to medium size and polar (T) 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 EKVP6; increased calcium activated cation channel activity; increased keratinocytes proliferation and differentiation; no effect on localization at cell membrane. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 1040 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1214 The length of the canonical sequence.
Location on the sequence: help VVLLLVIFLLVANILLVNLL I AMFSYTFGKVQGNSDLYWKA 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                         VVLLLVIFLLVANILLVNLLIAMFSYTFGKVQGNSDLYWKA

Mouse                         VVLLLIVFLLVANILLLNLLIAMFSYTFSKVHGNSDLYWKA

Rat                           VVLLLIVFLLVANILLLNLLIAMFSYTFNKVHGNSDLYWKA
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 – 1214 Transient receptor potential cation channel subfamily M member 4
Transmembrane 1020 – 1040 Helical
Mutagenesis 1049 – 1049 K -> A. Becomes insensitive to decavanadate's voltage modulation effect.
Mutagenesis 1059 – 1059 K -> Q. Does not affect PIP2-binding.
Helix 1034 – 1070



Literature citations
Gain-of-Function Mutations in TRPM4 Activation Gate Cause Progressive Symmetric Erythrokeratodermia.
Wang H.; Xu Z.; Lee B.H.; Vu S.; Hu L.; Lee M.; Bu D.; Cao X.; Hwang S.; Yang Y.; Zheng J.; Lin Z.;
J. Invest. Dermatol. 139:1089-1097(2019)
Cited for: FUNCTION; INVOLVEMENT IN EKVP6; TISSUE SPECIFICITY; VARIANTS EKVP6 MET-1033 AND THR-1040; CHARACTERIZATION OF VARIANTS EKVP6 MET-1033 AND THR-1040;
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.