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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P62266: Variant p.Phe120Ile

Small ribosomal subunit protein uS12
Gene: RPS23
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Variant information Variant position: help 120 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 Phenylalanine (F) to Isoleucine (I) at position 120 (F120I, p.Phe120Ile). 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 (F) to medium size and hydrophobic (I) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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 BTDD; decreases hydroxylation of the protein; decreases the accuracy of translation; decreases levels of incorporation of the mutant protein into polysomes; patient cells become highly sensitive to oxidative stress. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 120 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 143 The length of the canonical sequence.
Location on the sequence: help VLVAGFGRKGHAVGDIPGVR F KVVKVANVSLLALYKGKKER 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                         VLVAGFGRKGHAVGDIPGVRFKVVKVANVSLLALYKGKKER

Mouse                         VLVAGFGRKGHAVGDIPGVRFKVVKVANVSLLALYKGKKER

Rat                           VLVAGFGRKGHAVGDIPGVRFKVVKVANVSLLALYKGKKER

Pig                           VLVAGFGRKGHAVGDIPGVRFKVVKVANVSLLALYKGKKER

Bovine                        VLVAGFGRKGHAVGDIPGVRFKVVKVANVSLLALYKGKKER

Caenorhabditis elegans        VLVSGFGRSGHAVGDIPGVRFKIVKVANTSLIALFKGKKER

Drosophila                    VLVAGFGRKGHAVGDIPGVRFKVVKVANVSLLALYKEKKER

Slime mold                    VLVAGLGRSGHSVGDIPGVRFKVVKVSSVSLIAIYRGIKDK
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 2 – 143 Small ribosomal subunit protein uS12
Modified residue 135 – 135 N6-acetyllysine
Beta strand 120 – 125



Literature citations
A ribosomopathy reveals decoding defective ribosomes driving human dysmorphism.
Paolini N.A.; Attwood M.; Sondalle S.B.; Vieira C.M.; van Adrichem A.M.; di Summa F.M.; O'Donohue M.F.; Gleizes P.E.; Rachuri S.; Briggs J.W.; Fischer R.; Ratcliffe P.J.; Wlodarski M.W.; Houtkooper R.H.; von Lindern M.; Kuijpers T.W.; Dinman J.D.; Baserga S.J.; Cockman M.E.; MacInnes A.W.;
Am. J. Hum. Genet. 100:506-522(2017)
Cited for: FUNCTION; HYDROXYLATION AT PRO-62; INVOLVEMENT IN BTDD; VARIANTS BTDD LYS-67 AND ILE-120; CHARACTERIZATION OF VARIANTS BTDD LYS-67 AND ILE-120;
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.