UniProtKB/Swiss-Prot P06858: Variant p.Leu279Val

Lipoprotein lipase
Gene: LPL
Chromosomal location: 8p22
Variant information

Variant position:  279
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 have been found in patients and disease-association is reported in literature. However, this classification is not a definitive assessment of variant pathogenicity.
  • Polymorphism: No disease-association has been reported.
  • Unclassified: Variants have been found in patients but disease-association remains unclear.

Residue change:  From Leucine (L) to Valine (V) at position 279 (L279V, p.Leu279Val).
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:  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:  Lipoprotein lipase deficiency (LPL deficiency) [MIM:238600]: Recessive disorder usually manifesting in childhood. On a normal diet, patients often present with abdominal pain, hepatosplenomegaly, lipemia retinalis, eruptive xanthomata, and massive hypertriglyceridemia, sometimes complicated with acute pancreatitis. 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 LPL deficiency; decreases the specific activity of the enzyme; the total LPL mass is reduced compared to that of the wild-type construct.
Any additional useful information about the variant.



Sequence information

Variant position:  279
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  475
The length of the canonical sequence.

Location on the sequence:   DVDQLVKCSHERSIHLFIDS  L LNEENPSKAYRCSSKEAFEK
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.

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 28 – 475 Lipoprotein lipase
Active site 268 – 268 Charge relay system
Mutagenesis 268 – 268 H -> G. Lacks both triolein and tributyrin esterase activities.
Mutagenesis 268 – 268 H -> Q. Lacks both triolein and tributyrin esterase activities.


Literature citations

Genotype-phenotype studies of six novel LPL mutations in Chinese patients with hypertriglyceridemia.
Chan L.Y.S.; Lam C.-W.; Mak Y.-T.; Tomlinson B.; Tsang M.-W.; Baum L.; Masarei J.R.L.; Pang C.-P.;
Hum. Mutat. 20:232-233(2002)
Cited for: VARIANTS LPL DEFICIENCY THR-98; ILE-208; VAL-279; ARG-279; TYR-310; ARG-325 AND PHE-365; CHARACTERIZATION OF VARIANTS LPL DEFICIENCY THR-98; ILE-208; VAL-279; ARG-279; TYR-310; ARG-325 AND PHE-365;

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.