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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P03928: Variant p.Trp55Arg

ATP synthase protein 8
Gene: MT-ATP8
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Variant information Variant position: help 55 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 55 (W55R, p.Trp55Arg). 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 MC5DM2 and CMHI. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 55 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 68 The length of the canonical sequence.
Location on the sequence: help LPPSPKPMKMKNYNKPWEPK W TKICSLHSLPPQS 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                         LPPSPKPMKMKNYNKPWEPKWTKICSLHSLPPQS

Gorilla                       LPPLPKTMKMKNFCKPWEPKWTKIYSLHSLPPQS

                              ENPMTKSAKIAGQHNPWENKWTKIYSLLSLPPQ-

Chimpanzee                    LPPSPKPMKMKNYNKPWEPKWTKIYSLHSLPPQS

Mouse                         LAPSPKSLTTMKVKTPWELKWTKIYLPHSLPQQ-

Rat                           APPSPKTMATEKTNNPWESKWTKTYLPLSLPPQ-

Pig                           ASPESIELKTQKHSTPWEMKWTKIYLPLLLPPR-

Bovine                        HNPELTPTKMLKQNTPWETKWTKIYLPLLLPL--

Rabbit                        MNPVLKALESTSFPCPWETKWTKIYSPLSLPQH-

Goat                          HNPEL-TAKMLKHNTPWETKWTKIYLPLLLPL--

Sheep                         HNPELMTTKTPKQNTPWETKWTKIYLPLSLPL--

Cat                           SNPEPKSMTTLKQRNPWEKKWTKIYSPLSLPQQ-

Horse                         THPEVKTTKMTKHSAPWESKWTKIYSPLSLPQQ-

Chicken                       NNPANKITTTK--PTPWTWPWT------------

Xenopus laevis                NEPTTQTTEKSK-PNPWNWPWT------------

Zebrafish                     NDPTQVDAKEHK-NDTWNWPW-------------

Drosophila                    NSPKSNELKNINLNS-MNWKW-------------

Baker's yeast                 M-------------------ILRLYVSRLFISKL

Fission yeast                 R-------------------YNELFISRSIISSL

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 – 68 ATP synthase protein 8
Modified residue 54 – 54 N6-acetyllysine; alternate
Modified residue 54 – 54 N6-succinyllysine; alternate
Modified residue 57 – 57 N6-acetyllysine



Literature citations
Infantile cardiomyopathy caused by a mutation in the overlapping region of mitochondrial ATPase 6 and 8 genes.
Ware S.M.; El-Hassan N.; Kahler S.G.; Zhang Q.; Ma Y.W.; Miller E.; Wong B.; Spicer R.L.; Craigen W.J.; Kozel B.A.; Grange D.K.; Wong L.J.;
J. Med. Genet. 46:308-314(2009)
Cited for: VARIANT MC5DM2 ARG-55; INVOLVEMENT IN CMHI; VARIANT CMHI ARG-55;
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.