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UniProtKB/Swiss-Prot P78363: Variant p.Arg1129Leu

Retinal-specific phospholipid-transporting ATPase ABCA4
Gene: ABCA4
Variant information

Variant position:  1129
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Arginine (R) to Leucine (L) at position 1129 (R1129L, p.Arg1129Leu).
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:  Change from large size and basic (R) to medium size and hydrophobic (L)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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

Involvement in disease:  Macular degeneration, age-related, 2 (ARMD2) [MIM:153800]: A form of age-related macular degeneration, a multifactorial eye disease and the most common cause of irreversible vision loss in the developed world. In most patients, the disease is manifest as ophthalmoscopically visible yellowish accumulations of protein and lipid that lie beneath the retinal pigment epithelium and within an elastin-containing structure known as Bruch membrane. {ECO:0000269|PubMed:19028736, ECO:0000269|PubMed:9295268}. Note=Disease susceptibility is associated with variations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Involvement in disease:  Stargardt disease 1 (STGD1) [MIM:248200]: A common hereditary macular degeneration. It is characterized by decreased central vision, atrophy of the macula and underlying retinal pigment epithelium, and frequent presence of prominent flecks in the posterior pole of the retina. {ECO:0000269|PubMed:10090887, ECO:0000269|PubMed:10206579, ECO:0000269|PubMed:10612508, ECO:0000269|PubMed:10634594, ECO:0000269|PubMed:10711710, ECO:0000269|PubMed:10746567, ECO:0000269|PubMed:10958763, ECO:0000269|PubMed:11328725, ECO:0000269|PubMed:11385708, ECO:0000269|PubMed:11527935, ECO:0000269|PubMed:11594993, ECO:0000269|PubMed:18977788, ECO:0000269|PubMed:24097981, ECO:0000269|PubMed:24444108, ECO:0000269|PubMed:9054934, ECO:0000269|PubMed:9490294, ECO:0000269|PubMed:9503029, ECO:0000269|PubMed:9781034, ECO:0000269|PubMed:9973280}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In ARMD2 and STGD1; also found in patients with fundus flavimaculatus; reduced ATP-binding capacity.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  1129
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  2273
The length of the canonical sequence.

Location on the sequence:   SGRTIIMSTHHMDEADLLGD  R IAIIAQGRLYCSGTPLFLKN
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: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         SGRTIIMSTHHMDEADLLGDRIAIIAQGRLYCSGTPLFLKN

Mouse                         SGRTIIMSTHHMDEADLLGDRIAIISQGRLYCSGTPLFLKN

Slime mold                    ENKTIILVSHYLEECDILSNTISIIANGELKCNGSSLFLKN

Sequence annotation in neighborhood:  
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 – 2273 Retinal-specific phospholipid-transporting ATPase ABCA4
Topological domain 857 – 1376 Cytoplasmic
Domain 929 – 1160 ABC transporter 1


Literature citations

Molecular analysis of the ABCA4 gene for reliable detection of allelic variations in Spanish patients: identification of 21 novel variants.
Aguirre-Lamban J.; Riveiro-Alvarez R.; Maia-Lopes S.; Cantalapiedra D.; Vallespin E.; Avila-Fernandez A.; Villaverde-Montero C.; Trujillo-Tiebas M.J.; Ramos C.; Ayuso C.;
Br. J. Ophthalmol. 93:614-621(2009)
Cited for: VARIANTS ARMD2 GLU-762; LEU-1129; CYS-1724; SER-1977; ASN-2047 AND TYR-2137; VARIANT ILE-552;

Frequency of ABCA4 mutations in 278 Spanish controls: an insight into the prevalence of autosomal recessive Stargardt disease.
Riveiro-Alvarez R.; Aguirre-Lamban J.; Lopez-Martinez M.A.; Trujillo-Tiebas M.J.; Cantalapiedra D.; Vallespin E.; Avila-Fernandez A.; Ramos C.; Ayuso C.;
Br. J. Ophthalmol. 93:1359-1364(2009)
Cited for: VARIANTS STGD1 VAL-156; CYS-212; LYS-380; ARG-550; PRO-572; TRP-602; ARG-607; CYS-653; ASP-767; ILE-897; ALA-901; MET-931; SER-965; MET-1019; HIS-1108; LEU-1129; LEU-1380; ILE-1433; LEU-1486; TYR-1490; GLN-1640; TRP-1640; ARG-1748; ASP-1799; PRO-1940; GLU-1961; SER-1977; PHE-2027; ARG-2060; HIS-2107; TYR-2150 AND VAL-2241;

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.