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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9P0U1: Variant p.Trp25Arg

Mitochondrial import receptor subunit TOM7 homolog
Gene: TOMM7
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Variant information Variant position: help 25 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 Tryptophan (W) to Arginine (R) at position 25 (W25R, p.Trp25Arg). 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 large size and aromatic (W) to large size and basic (R) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 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 GMPGS; likely pathogenic; the orthologous mutation in mice results in growth defects, lipoatrophy and lipid accumulation in the liver. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 25 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 55 The length of the canonical sequence.
Location on the sequence: help SKEAKQRLQQLFKGSQFAIR W GFIPLVIYLGFKRGADPGMP 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                         SKEAKQRLQQLFKGSQFAIRWGFIPLVIYLGFKRGADPGMP

Mouse                         SKEAKQRLQQLFKGGQFAIRWGFIPLVIYLGFTRGADPGMP

Pig                           SKEAKQRLQQLFKGGQFAIRWGFIPLVIYLGFKRGADPGMP

Bovine                        SKEAKQRLQQLFKGGQFAIRWGFIPLVIYLGFKRGADPGMP

Caenorhabditis elegans        SPATKSFIGKTVDISTFAIQWGFVPFVVYLGFKKGAEP-MP

Baker's yeast                 SDESKERISKILTLTHNVAHYGWIPFVLYLGWAHTSN----

Fission yeast                 SEESKERLVKVFNIGKTVTHYGWIPLILWLGYTQSN----P
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 – 55 Mitochondrial import receptor subunit TOM7 homolog
Transmembrane 21 – 36 Helical
Helix 6 – 38



Literature citations
A hypomorphic variant in the translocase of the outer mitochondrial membrane complex subunit TOMM7 causes short stature and developmental delay.
Young C.; Batkovskyte D.; Kitamura M.; Shvedova M.; Mihara Y.; Akiba J.; Zhou W.; Hammarsjoe A.; Nishimura G.; Yatsuga S.; Grigelioniene G.; Kobayashi T.;
HGG Adv. 4:100148-100148(2023)
Cited for: VARIANT GMPGS ARG-25; CHARACTERIZATION OF VARIANT GMPGS ARG-25; INVOLVEMENT IN GMPGS;
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.