UniProtKB/SwissProt variant VAR

Variant information

Variant position:

840

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 Tryptophan (W) to Arginine (R) at position 840 (W840R, p.Trp840Arg).

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 aromatic (W) to large size and basic (R)

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:

High density lipoprotein deficiency 1 (HDLD1) [MIM:205400]: Recessive disorder characterized by absence of high density lipoprotein (HDL) cholesterol from plasma, accumulation of cholesteryl esters, premature coronary artery disease (CAD), hepatosplenomegaly, recurrent peripheral neuropathy and progressive muscle wasting and weakness. {ECO:0000269|PubMed:10431236, ECO:0000269|PubMed:10431237, ECO:0000269|PubMed:10706591, ECO:0000269|PubMed:10938021, ECO:0000269|PubMed:11086027, ECO:0000269|PubMed:11257260, ECO:0000269|PubMed:11476961, ECO:0000269|PubMed:11476965, ECO:0000269|PubMed:11785958, ECO:0000269|PubMed:12111371, ECO:0000269|PubMed:12111381, ECO:0000269|PubMed:12407001, ECO:0000269|PubMed:14576201, ECO:0000269|PubMed:14754908, ECO:0000269|PubMed:15019541, ECO:0000269|PubMed:15158913, ECO:0000269|PubMed:15262183, ECO:0000269|PubMed:15297675, ECO:0000269|PubMed:15520867, ECO:0000269|PubMed:24097981}. 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 HDLD1.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs1322998567 [ dbSNP | Ensembl ]

Sequence information

Variant position:

840

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

Protein sequence length:

2261

The length of the canonical sequence.

Location on the sequence:

NLTTSVSMMLFDTFLYGVMT W YIEAVFPGQYGIPRPWYFPC

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                         NLTTSVSMMLFDTFLYGVMTWYIEAVFPGQYGIPRPWYFPC

Mouse                         NLTTAVSMMLFDTFLYGVMTWYIEAVFPGQYGIPRPWYFPC

Slime mold                    LLT----------------------------------FIQS

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 – 2261	Phospholipid-transporting ATPase ABCA1
Transmembrane	827 – 847	Helical
Glycosylation	820 – 820	N-linked (GlcNAc...) asparagine

Literature citations

Screening for functional sequence variations and mutations in ABCA1.
Probst M.C.; Thumann H.; Aslanidis C.; Langmann T.; Buechler C.; Patsch W.; Baralle F.E.; Dallinga-Thie G.M.; Geisel J.; Keller C.; Menys V.C.; Schmitz G.;
Atherosclerosis 175:269-279(2004)
Cited for: VARIANTS HDLD1 LEU-590; ARG-840 AND CYS-1068; VARIANTS MET-771; SER-2163 AND ILE-2244;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O95477: Variant p.Trp840Arg