UniProtKB/SwissProt variant VAR

Variant information

Variant position:

1442

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 Asparagine (N) to Lysine (K) at position 1442 (N1442K, p.Asn1442Lys).

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 medium size and polar (N) to large size and basic (K)

The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:

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:

In STGD1; unknown pathological significance.

Any additional useful information about the variant.

Sequence information

Variant position:

1442

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:

PGSEQFTVLADVLLNKPGFG N RCLKEGWLPEYPCGNSTPWK

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                         PGSEQFTVLADVLLNKPGFGNRCLKEGWLPEYPCGNSTPWK

Mouse                         PNNEHLEVLADVLLNRPGFGNRCLKEEWLPEYPCINATSWK

Slime mold                    ------TVTQPLILDFNVYGK--------------SVTPVS

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.

Type	Positions	Description
Chain	1 – 2273	Retinal-specific phospholipid-transporting ATPase ABCA4
Topological domain	1398 – 1727	Extracellular
Disulfide bond	641 – 1490	Interchain
Beta strand	1440 – 1442

Literature citations

Detection rate of pathogenic mutations in ABCA4 using direct sequencing: clinical and research implications.
Downes S.M.; Packham E.; Cranston T.; Clouston P.; Seller A.; Nemeth A.H.;
Arch. Ophthalmol. 130:1486-1490(2012)
Cited for: VARIANTS 219-ARG--ASP-2273 DEL; HIS-576; ARG-1488; MET-1526; CYS-1557; THR-1562; GLU-1773; ASP-1794; 2040-ARG--ASP-2273 DEL AND CYS-2107; VARIANTS STGD1 TYR-54; GLN-152; ARG-184; PHE-184; CYS-212; SER-418; LYS-471; MET-643; CYS-653; 782-TRP--ASP-2273 DEL; ALA-863; GLN-943; ALA-989; ARG-991; MET-1019; LYS-1022; SER-1097; CYS-1108; LYS-1122; LEU-1129; ARG-1201; LEU-1380; LYS-1442; LEU-1486; TYR-1490; ASP-1598; ASP-1754; THR-1846; GLU-1961; PHE-2027; GLN-2030; CYS-2106; LYS-2131; TYR-2150 AND PRO-2237;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P78363: Variant p.Asn1442Lys