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UniProtKB/Swiss-Prot O95477: Variant p.Met1091Thr

Phospholipid-transporting ATPase ABCA1
Gene: ABCA1
Variant information

Variant position:  1091
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 Methionine (M) to Threonine (T) at position 1091 (M1091T, p.Met1091Thr).
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 hydrophobic (M) to medium size and polar (T)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -1
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 2 (HDLD2) [MIM:604091]: Inherited as autosomal dominant trait. It is characterized by moderately low HDL cholesterol, predilection toward premature coronary artery disease (CAD) and a reduction in cellular cholesterol efflux. {ECO:0000269|PubMed:10431236, ECO:0000269|PubMed:10533863, ECO:0000269|PubMed:11086027, ECO:0000269|PubMed:12009425, ECO:0000269|PubMed:12204794, ECO:0000269|PubMed:15722566, 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 HDLD2.
Any additional useful information about the variant.



Sequence information

Variant position:  1091
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:   IWELLLKYRQGRTIILSTHH  M DEADVLGDRIAIISHGKLCC
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                         IWELLLKYRQGRTIILSTHHMDEADVLGDRIAIISHGKLCC

Mouse                         IWELLLKYRQGRTIILSTHHMDEADILGDRIAIISHGKLCC

Slime mold                    IF-----------------------IVGSIFQLVFSG----

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 – 2261 Phospholipid-transporting ATPase ABCA1
Domain 899 – 1131 ABC transporter 1
Lipidation 1110 – 1110 S-palmitoyl cysteine
Lipidation 1111 – 1111 S-palmitoyl cysteine


Literature citations

Mutations in the ABC1 gene in familial HDL deficiency with defective cholesterol efflux.
Marcil M.; Brooks-Wilson A.; Clee S.M.; Roomp K.; Zhang L.-H.; Yu L.; Collins J.A.; van Dam M.; Molhuizen H.O.F.; Loubser O.; Ouellette B.F.F.; Sensen C.W.; Fichter K.; Mott S.; Denis M.; Boucher B.; Pimstone S.; Genest J. Jr.; Kastelein J.J.P.; Hayden M.R.;
Lancet 354:1341-1346(1999)
Cited for: VARIANTS HDLD2 THR-1091 AND 1893-GLU-ASP-1894 DEL; FUNCTION;

Age and residual cholesterol efflux affect HDL cholesterol levels and coronary artery disease in ABCA1 heterozygotes.
Clee S.M.; Kastelein J.J.P.; van Dam M.; Marcil M.; Roomp K.; Zwarts K.Y.; Collins J.A.; Roelants R.; Tamasawa N.; Stulc T.; Suda T.; Ceska R.; Boucher B.; Rondeau C.; DeSouich C.; Brooks-Wilson A.; Molhuizen H.O.F.; Frohlich J.; Genest J. Jr.; Hayden M.R.;
J. Clin. Invest. 106:1263-1270(2000)
Cited for: VARIANTS HDLD1 ARG-597; ILE-929 AND ARG-1477; VARIANTS HDLD2 LEU-693 DEL; THR-1091; 1893-GLU-ASP-1894 DEL AND LEU-2150;

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.