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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O95477: Variant p.Thr929Ile

Phospholipid-transporting ATPase ABCA1
Gene: ABCA1
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Variant information Variant position: help 929 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] 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: help From Threonine (T) to Isoleucine (I) at position 929 (T929I, p.Thr929Ile). 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: help Change from medium size and polar (T) to medium size and hydrophobic (I) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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

Variant description: help In TGD; moderately decreased protein abundance; highly decreased ATPase activity; highly decreased phospholipid translocase activity; loss protein subcellular localization to the plasma membrane. Any additional useful information about the variant.


Sequence information Variant position: help 929 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 2261 The length of the canonical sequence.
Location on the sequence: help RDGMKVAVDGLALNFYEGQI T SFLGHNGAGKTTTMSILTGL 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences.
Human                         RDGMKVAVDGLALNFYEGQITSFLGHNGAGKTTTMSILTGL

Mouse                         RDGMKVAVDGLALNFYEGQITSFLGHNGAGKTTTMSILTGL

Slime mold                    --------------FHFTKVLTDIGN----VTTNYPLLTYK

Sequence annotation in neighborhood: help 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
Mutagenesis 939 – 939 K -> M. Inhibits ATPase activity; when associated with M-1952. Decreases translocase activity; when associated with M-1952. Does not affect protein subcellular localization in plasma membrane and endosome; when associated with M-1952.
Beta strand 929 – 933



Literature citations
Differential phospholipid substrates and directional transport by ATP-binding cassette proteins ABCA1, ABCA7, and ABCA4 and disease-causing mutants.
Quazi F.; Molday R.S.;
J. Biol. Chem. 288:34414-34426(2013)
Cited for: CATALYTIC ACTIVITY; ACTIVITY REGULATION; MUTAGENESIS OF SER-100; PHE-593; LYS-939; THR-1512 AND LYS-1952; FUNCTION; VARIANTS TGD SER-590; ILE-929; SER-935; ARG-1477 AND TRP-2081; CHARACTERIZATION OF VARIANTS TGD SER-590; ILE-929; SER-935; ARG-1477 AND TRP-2081; VARIANT FHA1 LEU-2150; CHARACTERIZATION OF VARIANT FHA1 LEU-2150; SUBCELLULAR LOCATION; 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 TGD ARG-597; ILE-929 AND ARG-1477; VARIANTS FHA1 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.