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UniProtKB/Swiss-Prot P78363: Variant p.Val552Ile

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

Variant position:  552
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  US
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:  From Valine (V) to Isoleucine (I) at position 552 (V552I, p.Val552Ile).
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:  Similar physico-chemical property. Both residues are medium size and hydrophobic.
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  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:  In RP19; unknown pathological significance.
Any additional useful information about the variant.

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



Sequence information

Variant position:  552
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:   TQLTQRALSLLEENMFWAGV  V FPDMYPWTSSLPPHVKYKIR
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                         TQLTQRALSLLEENMFWAGVVFPDMYPWTSSLPPHVKYKIR

Mouse                         VQLTQRALSLLEENRFWAGVVFPGMYPWASSLPPHVKYKIR

Bovine                        FQLTQRALSLLEENRFWAGVVFPDMHPWTSSLPPHVKYKIR

Slime mold                    -----------------GGVWFPD----DSFNGNTIKYSIR

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 43 – 646 Extracellular
Beta strand 547 – 552


Literature citations

A comprehensive survey of sequence variation in the ABCA4 (ABCR) gene in Stargardt disease and age-related macular degeneration.
Rivera A.; White K.; Stoehr H.; Steiner K.; Hemmrich N.; Grimm T.; Jurklies B.; Lorenz B.; Scholl H.P.N.; Apfelstedt-Sylla E.; Weber B.H.F.;
Am. J. Hum. Genet. 67:800-813(2000)
Cited for: VARIANTS STGD1 GLU-60; THR-60; GLU-65; LEU-68; ARG-72; CYS-212; SER-230; SER-247; VAL-328; LYS-471; PRO-541; GLN-572; ARG-607; LYS-635; CYS-653; TYR-764; ARG-765; ALA-901; ILE-959; LYS-1036; VAL-1038; PRO-1063; ASP-1087; CYS-1097; CYS-1108; LEU-1380; LYS-1399; PRO-1430; VAL-1440; HIS-1443; LEU-1486; TYR-1488; MET-1537; PRO-1689; LEU-1705; THR-1733; ARG-1748; PRO-1763; LYS-1885; HIS-1898; GLU-1961; ARG-1975; SER-1977; GLY-2077; TRP-2077 AND VAL-2241; VARIANTS GLN-152; HIS-212; ARG-423; ILE-552; ARG-914; GLN-943; THR-1562; ILE-1868; MET-1921; LEU-1948; PHE-1970; ALA-2059; ASN-2177 AND VAL-2216;

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;

An augmented ABCA4 screen targeting noncoding regions reveals a deep intronic founder variant in Belgian Stargardt patients.
Bauwens M.; De Zaeytijd J.; Weisschuh N.; Kohl S.; Meire F.; Dahan K.; Depasse F.; De Jaegere S.; De Ravel T.; De Rademaeker M.; Loeys B.; Coppieters F.; Leroy B.P.; De Baere E.;
Hum. Mutat. 36:39-42(2015)
Cited for: VARIANTS CORD3 CYS-440; GLY-643; HIS-1145; GLU-1203; LEU-2050 AND ASN-2177; VARIANTS STGD1 HIS-24; GLU-65; SER-247; 431-TRP--ASP-2273 DEL; PRO-541; ARG-607; HIS-653; ALA-863; 1029-GLN--ASP-2273 DEL; VAL-1038; GLN-1300; MET-1537; TRP-1640; PRO-1763; HIS-1898; GLU-1961; PHE-1970; PHE-2027; GLN-2030 AND ARG-2033; VARIANTS RP19 MET-455 AND ILE-552; VARIANTS 681-ARG--ASP-2273 DEL; ASP-767 AND ARG-1591; VARIANT CORD3 GLU-1961;

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.