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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P04180: Variant p.Thr298Ala

Phosphatidylcholine-sterol acyltransferase
Gene: LCAT
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Variant information Variant position: help 298 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 Alanine (A) at position 298 (T298A, p.Thr298Ala). 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 small size and hydrophobic (A) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 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: help In FED and LCATD. Any additional useful information about the variant.


Sequence information Variant position: help 298 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 440 The length of the canonical sequence.
Location on the sequence: help PSRMAWPEDHVFISTPSFNY T GRDFQRFFADLHFEEGWYMW 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                         PSRMAWPEDHVFISTPSFNYTGRDFQRFFADLHFEEGWYMW

Mouse                         PAPHVWPEDHVFISTPNFNYTVQDFERFFTDLHFEEGWHMF

Rat                           PAHHVWPEDHVFISTPNFNYTGQDFERFFADLHFEEGWHMF

Rabbit                        PSQGVWPEDHVFISTPSFNYTGRDFKRFFEDLHFEEGWYMW
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 25 – 440 Phosphatidylcholine-sterol acyltransferase
Glycosylation 296 – 296 N-linked (GlcNAc...) (complex) asparagine
Beta strand 296 – 298



Literature citations
Hypocomplementemic type II membranoproliferative glomerulonephritis in a male patient with familial lecithin-cholesterol acyltransferase deficiency due to two different allelic mutations.
Sessa A.; Battini G.; Meroni M.; Daidone G.; Carnera I.; Brambilla P.L.; Vigano G.; Giordano F.; Pallotti F.; Torri Tarelli L.; Calabresi L.; Rolleri M.; Bertolini S.;
Nephron 88:268-272(2001)
Cited for: VARIANT LCATD ALA-298; The molecular basis of lecithin:cholesterol acyltransferase deficiency syndromes: a comprehensive study of molecular and biochemical findings in 13 unrelated Italian families.
Calabresi L.; Pisciotta L.; Costantin A.; Frigerio I.; Eberini I.; Alessandrini P.; Arca M.; Bon G.B.; Boscutti G.; Busnach G.; Frasca G.; Gesualdo L.; Gigante M.; Lupattelli G.; Montali A.; Pizzolitto S.; Rabbone I.; Rolleri M.; Ruotolo G.; Sampietro T.; Sessa A.; Vaudo G.; Cantafora A.; Veglia F.; Calandra S.; Bertolini S.; Franceschini G.;
Arterioscler. Thromb. Vasc. Biol. 25:1972-1978(2005)
Cited for: VARIANTS FED GLU-70 AND ALA-298; VARIANTS LCATD CYS-164; TRP-171; ASN-205; ASN-242; HIS-268; ILE-298 AND MET-333; VARIANTS PRO-115; THR-165 AND ARG-396;
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.