UniProtKB/SwissProt variant VAR

Variant information

Variant position:

1553

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 Leucine (L) to Proline (P) at position 1553 (L1553P, p.Leu1553Pro).

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

Involvement in disease:

Pulmonary surfactant metabolism dysfunction 3 (SMDP3) [MIM:610921]: A rare lung disorder due to impaired surfactant homeostasis. It is characterized by alveolar filling with floccular material that stains positive using the periodic acid-Schiff method and is derived from surfactant phospholipids and protein components. Excessive lipoproteins accumulation in the alveoli results in severe respiratory distress. {ECO:0000269|PubMed:15044640}. 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 SMDP3.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs121909183 [ dbSNP | Ensembl ]

Sequence information

Variant position:

1553

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

Protein sequence length:

1704

The length of the canonical sequence.

Location on the sequence:

PAVIFLDEPSTGMDPVARRL L WDTVARARESGKAIIITSHS

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                         PAVIFLDEPSTGMDPVARRLLWDTVARARESGKAIIITSHS

Mouse                         PAVIFLDEPSTGMDPVARRLLWDTVARARESGKAIVITSHS

Slime mold                    PSVCFLDEVSAGVDPVVARFMWNVITELKK-DKVIILTTHS

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 – 1704	ATP-binding cassette sub-family A member 3
Domain	1381 – 1614	ABC transporter 2
Alternative sequence	210 – 1704	Missing. In isoform 2.

Literature citations

ABCA3 gene mutations in newborns with fatal surfactant deficiency.
Shulenin S.; Nogee L.M.; Annilo T.; Wert S.E.; Whitsett J.A.; Dean M.;
N. Engl. J. Med. 350:1296-1303(2004)
Cited for: VARIANTS SMDP3 PRO-101; ASP-568; PRO-1553 AND PRO-1591;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q99758: Variant p.Leu1553Pro